From 8d9d083a5288728dec56d169a4e919e795ef1281 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Wed, 29 Mar 2023 12:39:00 +0800 Subject: [PATCH 01/95] Add import support to ec evaluator --- src/ec-evaluator/interpreter.ts | 51 +++++++++++++++++++++++++++++++-- src/ec-evaluator/utils.ts | 4 +-- 2 files changed, 51 insertions(+), 4 deletions(-) diff --git a/src/ec-evaluator/interpreter.ts b/src/ec-evaluator/interpreter.ts index 5638ebd2f..75cdd4c44 100644 --- a/src/ec-evaluator/interpreter.ts +++ b/src/ec-evaluator/interpreter.ts @@ -7,12 +7,14 @@ /* tslint:disable:max-classes-per-file */ import * as es from 'estree' -import { uniqueId } from 'lodash' +import { partition, uniqueId } from 'lodash' import { UNKNOWN_LOCATION } from '../constants' import * as errors from '../errors/errors' import { RuntimeSourceError } from '../errors/runtimeSourceError' import Closure from '../interpreter/closure' +import { loadModuleBundle, loadModuleTabs } from '../modules/moduleLoader' +import { ModuleFunctions } from '../modules/moduleTypes' import { checkEditorBreakpoints } from '../stdlib/inspector' import { Context, ContiguousArrayElements, Result, Value } from '../types' import * as ast from '../utils/astCreator' @@ -43,6 +45,7 @@ import { createEnvironment, currentEnvironment, declareFunctionsAndVariables, + declareIdentifier, defineVariable, getVariable, handleRuntimeError, @@ -92,7 +95,13 @@ export class Stash extends Stack { export function evaluate(program: es.Program, context: Context): Value { try { context.runtime.isRunning = true - context.runtime.agenda = new Agenda(program) + + const nonImportNodes = evaluateImports(program, context, true) + + context.runtime.agenda = new Agenda({ + ...program, + body: nonImportNodes + }) context.runtime.stash = new Stash() return runECEMachine(context, context.runtime.agenda, context.runtime.stash) } catch (error) { @@ -121,6 +130,41 @@ export function resumeEvaluate(context: Context) { } } +function evaluateImports(program: es.Program, context: Context, loadTabs: boolean) { + const [importNodes, otherNodes] = partition( + program.body, + ({ type }) => type === 'ImportDeclaration' + ) as [es.ImportDeclaration[], es.Statement[]] + + const moduleFunctions: Record = {} + + for (const node of importNodes) { + const moduleName = node.source.value + if (typeof moduleName !== 'string') { + throw new Error(`ImportDeclarations should have string sources, got ${moduleName}`) + } + + if (!(moduleName in moduleFunctions)) { + context.moduleContexts[moduleName] = { + state: null, + tabs: loadTabs ? loadModuleTabs(moduleName, node) : null + } + moduleFunctions[moduleName] = loadModuleBundle(moduleName, context, node) + } + + const environment = currentEnvironment(context) + for (const spec of node.specifiers) { + if (spec.type !== 'ImportSpecifier') { + throw new Error(`Only ImportSpecifiers are supported, got: ${spec.type}`) + } + declareIdentifier(context, spec.local.name, node, environment) + defineVariable(context, spec.local.name, moduleFunctions[spec.imported.name], true, node) + } + } + + return otherNodes +} + /** * Function that returns the appropriate Promise given the output of ec evaluating, depending * on whether the program is finished evaluating, ran into a breakpoint or ran into an error. @@ -339,6 +383,9 @@ const cmdEvaluators: { [type: string]: CmdEvaluator } = { ) { agenda.push(instr.breakInstr()) }, + ImportDeclaration: function () { + throw new Error('Import Declarations should already have been removed.') + }, /** * Expressions diff --git a/src/ec-evaluator/utils.ts b/src/ec-evaluator/utils.ts index dd62e725d..9d145f6b5 100644 --- a/src/ec-evaluator/utils.ts +++ b/src/ec-evaluator/utils.ts @@ -205,7 +205,7 @@ export const createBlockEnvironment = ( const DECLARED_BUT_NOT_YET_ASSIGNED = Symbol('Used to implement hoisting') -function declareIdentifier( +export function declareIdentifier( context: Context, name: string, node: es.Node, @@ -259,7 +259,7 @@ export function defineVariable( name: string, value: Value, constant = false, - node: es.VariableDeclaration + node: es.VariableDeclaration | es.ImportDeclaration ) { const environment = currentEnvironment(context) From c0dbbfae66aded68a5165fcbfaf71454ebfc8225 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Wed, 29 Mar 2023 13:27:27 +0800 Subject: [PATCH 02/95] Add support for import checking --- src/__tests__/environment.ts | 4 +- src/ec-evaluator/interpreter.ts | 55 ++++++++----- src/infiniteLoops/instrument.ts | 3 +- src/interpreter/interpreter.ts | 122 ++++++++++++++++++---------- src/modules/errors.ts | 21 +++++ src/modules/moduleLoader.ts | 2 +- src/runner/sourceRunner.ts | 4 +- src/transpiler/__tests__/modules.ts | 5 +- src/transpiler/transpiler.ts | 24 +++++- 9 files changed, 165 insertions(+), 75 deletions(-) create mode 100644 src/modules/errors.ts diff --git a/src/__tests__/environment.ts b/src/__tests__/environment.ts index 408380c18..e8d6cbe57 100644 --- a/src/__tests__/environment.ts +++ b/src/__tests__/environment.ts @@ -1,6 +1,6 @@ import { Program } from 'estree' -import { evaluate } from '../interpreter/interpreter' +import { evaluateProgram as evaluate } from '../interpreter/interpreter' import { mockContext } from '../mocks/context' import { parse } from '../parser/parser' import { Chapter } from '../types' @@ -18,7 +18,7 @@ test('Function params and body identifiers are in different environment', () => const context = mockContext(Chapter.SOURCE_4) context.prelude = null // hide the unneeded prelude const parsed = parse(code, context) - const it = evaluate(parsed as any as Program, context) + const it = evaluate(parsed as any as Program, context, false, false) const stepsToComment = 13 // manually counted magic number for (let i = 0; i < stepsToComment; i += 1) { it.next() diff --git a/src/ec-evaluator/interpreter.ts b/src/ec-evaluator/interpreter.ts index 75cdd4c44..689172b0d 100644 --- a/src/ec-evaluator/interpreter.ts +++ b/src/ec-evaluator/interpreter.ts @@ -13,6 +13,7 @@ import { UNKNOWN_LOCATION } from '../constants' import * as errors from '../errors/errors' import { RuntimeSourceError } from '../errors/runtimeSourceError' import Closure from '../interpreter/closure' +import { UndefinedImportError } from '../modules/errors' import { loadModuleBundle, loadModuleTabs } from '../modules/moduleLoader' import { ModuleFunctions } from '../modules/moduleTypes' import { checkEditorBreakpoints } from '../stdlib/inspector' @@ -96,7 +97,7 @@ export function evaluate(program: es.Program, context: Context): Value { try { context.runtime.isRunning = true - const nonImportNodes = evaluateImports(program, context, true) + const nonImportNodes = evaluateImports(program, context, true, true) context.runtime.agenda = new Agenda({ ...program, @@ -105,6 +106,7 @@ export function evaluate(program: es.Program, context: Context): Value { context.runtime.stash = new Stash() return runECEMachine(context, context.runtime.agenda, context.runtime.stash) } catch (error) { + // console.error('ecerror:', error) return new ECError() } finally { context.runtime.isRunning = false @@ -130,7 +132,12 @@ export function resumeEvaluate(context: Context) { } } -function evaluateImports(program: es.Program, context: Context, loadTabs: boolean) { +function evaluateImports( + program: es.Program, + context: Context, + loadTabs: boolean, + checkImports: boolean +) { const [importNodes, otherNodes] = partition( program.body, ({ type }) => type === 'ImportDeclaration' @@ -138,28 +145,38 @@ function evaluateImports(program: es.Program, context: Context, loadTabs: boolea const moduleFunctions: Record = {} - for (const node of importNodes) { - const moduleName = node.source.value - if (typeof moduleName !== 'string') { - throw new Error(`ImportDeclarations should have string sources, got ${moduleName}`) - } + try { + for (const node of importNodes) { + const moduleName = node.source.value + if (typeof moduleName !== 'string') { + throw new Error(`ImportDeclarations should have string sources, got ${moduleName}`) + } - if (!(moduleName in moduleFunctions)) { - context.moduleContexts[moduleName] = { - state: null, - tabs: loadTabs ? loadModuleTabs(moduleName, node) : null + if (!(moduleName in moduleFunctions)) { + context.moduleContexts[moduleName] = { + state: null, + tabs: loadTabs ? loadModuleTabs(moduleName, node) : null + } + moduleFunctions[moduleName] = loadModuleBundle(moduleName, context, node) } - moduleFunctions[moduleName] = loadModuleBundle(moduleName, context, node) - } - const environment = currentEnvironment(context) - for (const spec of node.specifiers) { - if (spec.type !== 'ImportSpecifier') { - throw new Error(`Only ImportSpecifiers are supported, got: ${spec.type}`) + const functions = moduleFunctions[moduleName] + const environment = currentEnvironment(context) + for (const spec of node.specifiers) { + if (spec.type !== 'ImportSpecifier') { + throw new Error(`Only ImportSpecifiers are supported, got: ${spec.type}`) + } + + if (checkImports && !(spec.imported.name in functions)) { + throw new UndefinedImportError(spec.imported.name, moduleName, node) + } + + declareIdentifier(context, spec.local.name, node, environment) + defineVariable(context, spec.local.name, functions[spec.imported.name], true, node) } - declareIdentifier(context, spec.local.name, node, environment) - defineVariable(context, spec.local.name, moduleFunctions[spec.imported.name], true, node) } + } catch (error) { + handleRuntimeError(context, error) } return otherNodes diff --git a/src/infiniteLoops/instrument.ts b/src/infiniteLoops/instrument.ts index ccef924e2..5b422167d 100644 --- a/src/infiniteLoops/instrument.ts +++ b/src/infiniteLoops/instrument.ts @@ -579,7 +579,8 @@ function handleImports(programs: es.Program[]): [string, string[]] { ([prefix, moduleNames], program) => { const [prefixToAdd, importsToAdd, otherNodes] = transformImportDeclarations( program, - new Set() + new Set(), + false, ) program.body = (importsToAdd as es.Program['body']).concat(otherNodes) prefix.push(prefixToAdd) diff --git a/src/interpreter/interpreter.ts b/src/interpreter/interpreter.ts index 5a2a7008f..6a75347a0 100644 --- a/src/interpreter/interpreter.ts +++ b/src/interpreter/interpreter.ts @@ -6,9 +6,12 @@ import { UNKNOWN_LOCATION } from '../constants' import { LazyBuiltIn } from '../createContext' import * as errors from '../errors/errors' import { RuntimeSourceError } from '../errors/runtimeSourceError' +import { UndefinedImportError } from '../modules/errors' import { loadModuleBundle, loadModuleTabs } from '../modules/moduleLoader' +import { ModuleFunctions } from '../modules/moduleTypes' import { checkEditorBreakpoints } from '../stdlib/inspector' import { Context, ContiguousArrayElements, Environment, Frame, Value, Variant } from '../types' +import * as create from '../utils/astCreator' import { conditionalExpression, literal, primitive } from '../utils/astCreator' import { evaluateBinaryExpression, evaluateUnaryExpression } from '../utils/operators' import * as rttc from '../utils/rttc' @@ -126,12 +129,6 @@ function declareVariables(context: Context, node: es.VariableDeclaration) { } } -function declareImports(context: Context, node: es.ImportDeclaration) { - for (const declaration of node.specifiers) { - declareIdentifier(context, declaration.local.name, node) - } -} - function declareFunctionsAndVariables(context: Context, node: es.BlockStatement) { for (const statement of node.body) { switch (statement.type) { @@ -658,38 +655,7 @@ export const evaluators: { [nodeType: string]: Evaluator } = { }, ImportDeclaration: function*(node: es.ImportDeclaration, context: Context) { - try { - const moduleName = node.source.value as string - const neededSymbols = node.specifiers.map(spec => { - if (spec.type !== 'ImportSpecifier') { - throw new Error( - `I expected only ImportSpecifiers to be allowed, but encountered ${spec.type}.` - ) - } - - return { - imported: spec.imported.name, - local: spec.local.name - } - }) - - if (!(moduleName in context.moduleContexts)) { - context.moduleContexts[moduleName] = { - state: null, - tabs: loadModuleTabs(moduleName, node) - }; - } - - const functions = loadModuleBundle(moduleName, context, node) - declareImports(context, node) - for (const name of neededSymbols) { - defineVariable(context, name.local, functions[name.imported], true); - } - - return undefined - } catch(error) { - return handleRuntimeError(context, error) - } + throw new Error('ImportDeclarations should already have been removed') }, ExportNamedDeclaration: function*(_node: es.ExportNamedDeclaration, _context: Context) { @@ -714,11 +680,7 @@ export const evaluators: { [nodeType: string]: Evaluator } = { }, Program: function*(node: es.BlockStatement, context: Context) { - context.numberOfOuterEnvironments += 1 - const environment = createBlockEnvironment(context, 'programEnvironment') - pushEnvironment(context, environment) - const result = yield *forceIt(yield* evaluateBlockStatement(context, node), context); - return result; + throw new Error('A program should not contain another program within itself') } } // tslint:enable:object-literal-shorthand @@ -747,7 +709,79 @@ function getNonEmptyEnv(environment: Environment): Environment { } } -export function* evaluate(node: es.Node, context: Context) { +export function* evaluateProgram( + program: es.Program, + context: Context, + checkImports: boolean, + loadTabs: boolean +) { + yield* visit(context, program) + + context.numberOfOuterEnvironments += 1 + const environment = createBlockEnvironment(context, 'programEnvironment') + pushEnvironment(context, environment) + + const otherNodes: es.Statement[] = [] + const moduleFunctions: Record = {} + + try { + for (const node of program.body) { + if (node.type !== 'ImportDeclaration') { + otherNodes.push(node as es.Statement) + continue + } + + yield* visit(context, node) + + const moduleName = node.source.value + if (typeof moduleName !== 'string') { + throw new Error(`ImportDeclarations should have string sources, got ${moduleName}`) + } + + if (!(moduleName in moduleFunctions)) { + context.moduleContexts[moduleName] = { + state: null, + tabs: loadTabs ? loadModuleTabs(moduleName, node) : null + } + moduleFunctions[moduleName] = loadModuleBundle(moduleName, context, node) + } + + const functions = moduleFunctions[moduleName] + + for (const spec of node.specifiers) { + if (spec.type !== 'ImportSpecifier') { + throw new Error(`Only Import Specifiers are supported, got ${spec.type}`) + } + + if (checkImports && !(spec.imported.name in functions)) { + throw new UndefinedImportError(spec.imported.name, moduleName, node) + } + + declareIdentifier(context, spec.local.name, node) + defineVariable(context, spec.local.name, functions[spec.imported.name], true) + } + yield* leave(context) + } + } catch (error) { + handleRuntimeError(context, error) + } + + const newProgram = create.blockStatement(otherNodes) + const result = yield* forceIt(yield* evaluateBlockStatement(context, newProgram), context) + + yield* leave(context) // Done visiting program + + if (result instanceof Closure) { + Object.defineProperty(getNonEmptyEnv(currentEnvironment(context)).head, uniqueId(), { + value: result, + writable: false, + enumerable: true + }) + } + return result +} + +function* evaluate(node: es.Node, context: Context) { yield* visit(context, node) const result = yield* evaluators[node.type](node, context) yield* leave(context) diff --git a/src/modules/errors.ts b/src/modules/errors.ts new file mode 100644 index 000000000..fa3ebaef0 --- /dev/null +++ b/src/modules/errors.ts @@ -0,0 +1,21 @@ +import type { ImportDeclaration } from 'estree' + +import { RuntimeSourceError } from '../errors/runtimeSourceError' + +export class UndefinedImportError extends RuntimeSourceError { + constructor( + public readonly symbol: string, + public readonly moduleName: string, + node?: ImportDeclaration + ) { + super(node) + } + + public explain(): string { + return `'${this.moduleName}' does not contain a definition for '${this.symbol}'` + } + + public elaborate(): string { + return "Check your imports and make sure what you're trying to import exists!" + } +} diff --git a/src/modules/moduleLoader.ts b/src/modules/moduleLoader.ts index ef33924d6..eaa8e0133 100644 --- a/src/modules/moduleLoader.ts +++ b/src/modules/moduleLoader.ts @@ -78,7 +78,7 @@ export function loadModuleBundle(path: string, context: Context, node?: es.Node) // Get module file const moduleText = memoizedGetModuleFile(path, 'bundle') try { - const moduleBundle: ModuleBundle = eval(moduleText) + const moduleBundle: ModuleBundle = eval(`(${moduleText})`) return moduleBundle({ context }) } catch (error) { // console.error("bundle error: ", error) diff --git a/src/runner/sourceRunner.ts b/src/runner/sourceRunner.ts index 88f741134..f4c72da55 100644 --- a/src/runner/sourceRunner.ts +++ b/src/runner/sourceRunner.ts @@ -12,7 +12,7 @@ import { TimeoutError } from '../errors/timeoutErrors' import { transpileToGPU } from '../gpu/gpu' import { isPotentialInfiniteLoop } from '../infiniteLoops/errors' import { testForInfiniteLoop } from '../infiniteLoops/runtime' -import { evaluate } from '../interpreter/interpreter' +import { evaluateProgram as evaluate } from '../interpreter/interpreter' import { nonDetEvaluate } from '../interpreter/interpreter-non-det' import { transpileToLazy } from '../lazy/lazy' import preprocessFileImports from '../localImports/preprocessor' @@ -103,7 +103,7 @@ function runSubstitution( } function runInterpreter(program: es.Program, context: Context, options: IOptions): Promise { - let it = evaluate(program, context) + let it = evaluate(program, context, true, true) let scheduler: Scheduler if (context.variant === Variant.NON_DET) { it = nonDetEvaluate(program, context) diff --git a/src/transpiler/__tests__/modules.ts b/src/transpiler/__tests__/modules.ts index 99dc7eb30..bb33cad73 100644 --- a/src/transpiler/__tests__/modules.ts +++ b/src/transpiler/__tests__/modules.ts @@ -19,7 +19,7 @@ test('Transform import declarations into variable declarations', () => { ` const context = mockContext(Chapter.SOURCE_4) const program = parse(code, context)! - const [, importNodes] = transformImportDeclarations(program, new Set()) + const [, importNodes] = transformImportDeclarations(program, new Set(), false) expect(importNodes[0].type).toBe('VariableDeclaration') expect((importNodes[0].declarations[0].id as Identifier).name).toEqual('foo') @@ -40,7 +40,8 @@ test('Transpiler accounts for user variable names when transforming import state const program = parse(code, context)! const [, importNodes, [varDecl0, varDecl1]] = transformImportDeclarations( program, - new Set(['__MODULE_0__', '__MODULE_2__']) + new Set(['__MODULE_0__', '__MODULE_2__']), + false, ) expect(importNodes[0].type).toBe('VariableDeclaration') diff --git a/src/transpiler/transpiler.ts b/src/transpiler/transpiler.ts index 00fab3faa..80e255827 100644 --- a/src/transpiler/transpiler.ts +++ b/src/transpiler/transpiler.ts @@ -6,7 +6,8 @@ import { RawSourceMap, SourceMapGenerator } from 'source-map' import { NATIVE_STORAGE_ID, UNKNOWN_LOCATION } from '../constants' import { UndefinedVariable } from '../errors/errors' -import { memoizedGetModuleFile } from '../modules/moduleLoader' +import { UndefinedImportError } from '../modules/errors' +import { memoizedGetModuleFile, memoizedloadModuleDocs } from '../modules/moduleLoader' import { AllowedDeclarations, Chapter, Context, NativeStorage, Variant } from '../types' import * as create from '../utils/astCreator' import { @@ -40,6 +41,7 @@ export type NativeIds = Record export function transformImportDeclarations( program: es.Program, usedIdentifiers: Set, + checkImports: boolean, useThis: boolean = false ): [string, es.VariableDeclaration[], es.Program['body']] { const prefix: string[] = [] @@ -72,9 +74,21 @@ export function transformImportDeclarations( moduleNamespace = moduleNames.get(moduleName)! } + const moduleDocs: Record | null = checkImports + ? memoizedloadModuleDocs(moduleName, node) + : null + return node.specifiers.map(specifier => { if (specifier.type !== 'ImportSpecifier') { - throw new Error(`Expected import specifier, found: ${node.type}`) + throw new Error(`Expected import specifier, found: ${specifier.type}`) + } + + if (checkImports) { + if (!moduleDocs) { + console.warn(`Failed to load docs for ${moduleName}, skipping typechecking`) + } else if (!(specifier.imported.name in moduleDocs)) { + throw new UndefinedImportError(specifier.imported.name, moduleName, node) + } } // Convert each import specifier to its corresponding local variable declaration @@ -612,7 +626,8 @@ function transpileToSource( const [modulePrefix, importNodes, otherNodes] = transformImportDeclarations( program, - usedIdentifiers + usedIdentifiers, + true ) program.body = (importNodes as es.Program['body']).concat(otherNodes) @@ -653,7 +668,8 @@ function transpileToFullJS( const [modulePrefix, importNodes, otherNodes] = transformImportDeclarations( program, - usedIdentifiers + usedIdentifiers, + false ) const transpiledProgram: es.Program = create.program([ From b4ff44ae6afa778db4b2477b682037f42e40a51d Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Wed, 29 Mar 2023 13:28:30 +0800 Subject: [PATCH 03/95] Run format --- src/infiniteLoops/instrument.ts | 2 +- src/interpreter/interpreter.ts | 2 +- src/transpiler/__tests__/modules.ts | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/src/infiniteLoops/instrument.ts b/src/infiniteLoops/instrument.ts index 5b422167d..c8c98d0e8 100644 --- a/src/infiniteLoops/instrument.ts +++ b/src/infiniteLoops/instrument.ts @@ -580,7 +580,7 @@ function handleImports(programs: es.Program[]): [string, string[]] { const [prefixToAdd, importsToAdd, otherNodes] = transformImportDeclarations( program, new Set(), - false, + false ) program.body = (importsToAdd as es.Program['body']).concat(otherNodes) prefix.push(prefixToAdd) diff --git a/src/interpreter/interpreter.ts b/src/interpreter/interpreter.ts index 6a75347a0..afb66958e 100644 --- a/src/interpreter/interpreter.ts +++ b/src/interpreter/interpreter.ts @@ -752,7 +752,7 @@ export function* evaluateProgram( if (spec.type !== 'ImportSpecifier') { throw new Error(`Only Import Specifiers are supported, got ${spec.type}`) } - + if (checkImports && !(spec.imported.name in functions)) { throw new UndefinedImportError(spec.imported.name, moduleName, node) } diff --git a/src/transpiler/__tests__/modules.ts b/src/transpiler/__tests__/modules.ts index bb33cad73..83679e1b0 100644 --- a/src/transpiler/__tests__/modules.ts +++ b/src/transpiler/__tests__/modules.ts @@ -41,7 +41,7 @@ test('Transpiler accounts for user variable names when transforming import state const [, importNodes, [varDecl0, varDecl1]] = transformImportDeclarations( program, new Set(['__MODULE_0__', '__MODULE_2__']), - false, + false ) expect(importNodes[0].type).toBe('VariableDeclaration') From 08becf151a98f8f97fc04e1087775a3e75ff85ad Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Wed, 29 Mar 2023 13:33:38 +0800 Subject: [PATCH 04/95] Fix module loader test --- src/modules/__tests__/moduleLoader.ts | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/src/modules/__tests__/moduleLoader.ts b/src/modules/__tests__/moduleLoader.ts index 32a579c1a..1a7643d9f 100644 --- a/src/modules/__tests__/moduleLoader.ts +++ b/src/modules/__tests__/moduleLoader.ts @@ -1,6 +1,7 @@ import { createEmptyContext } from '../../createContext' import { ModuleConnectionError, ModuleInternalError } from '../../errors/moduleErrors' import { Variant } from '../../types' +import { stripIndent } from '../../utils/formatters' import * as moduleLoader from '../moduleLoader' // Mock memoize function from lodash @@ -103,7 +104,13 @@ describe('Testing modules/moduleLoader.ts in a jsdom environment', () => { test('Loading a module bundle correctly', () => { const sampleManifest = `{ "module": { "tabs": [] } }` mockXMLHttpRequest({ responseText: sampleManifest }) - const sampleResponse = `(function () { 'use strict'; function make_empty_array () { return []; } function index(__params) { return { make_empty_array: make_empty_array }; } return index; })();` + const sampleResponse = stripIndent`function () { + 'use strict'; + function make_empty_array () { return []; } + return { + make_empty_array + } + }` mockXMLHttpRequest({ responseText: sampleResponse }) const loadedBundle = moduleLoader.loadModuleBundle( 'module', From 6d8c5f19ef08aa8f60a3c090286beb8b0ae2444f Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Wed, 29 Mar 2023 17:42:29 +0800 Subject: [PATCH 05/95] Add tests --- .../__snapshots__/ec-evaluator-errors.ts.snap | 13 ++++ .../__snapshots__/ec-evaluator.ts.snap | 14 ++++ .../__tests__/ec-evaluator-errors.ts | 43 ++++++++++++ src/ec-evaluator/__tests__/ec-evaluator.ts | 46 +++++++++++++ src/ec-evaluator/interpreter.ts | 1 + .../__tests__/interpreter-errors.ts | 31 +++++++++ src/transpiler/__tests__/modules.ts | 65 ++++++++++++++++++- src/transpiler/transpiler.ts | 15 ----- 8 files changed, 211 insertions(+), 17 deletions(-) diff --git a/src/ec-evaluator/__tests__/__snapshots__/ec-evaluator-errors.ts.snap b/src/ec-evaluator/__tests__/__snapshots__/ec-evaluator-errors.ts.snap index 8f273c24c..56e49bab0 100644 --- a/src/ec-evaluator/__tests__/__snapshots__/ec-evaluator-errors.ts.snap +++ b/src/ec-evaluator/__tests__/__snapshots__/ec-evaluator-errors.ts.snap @@ -792,6 +792,19 @@ Object { } `; +exports[`Importing unknown variables throws UndefinedImport error: expectParsedError 1`] = ` +Object { + "alertResult": Array [], + "code": "import { foo1 } from 'one_module';", + "displayResult": Array [], + "numErrors": 1, + "parsedErrors": "'one_module' does not contain a definition for 'foo1'", + "result": undefined, + "resultStatus": "error", + "visualiseListResult": Array [], +} +`; + exports[`In a block, every going-to-be-defined variable in the block cannot be accessed until it has been defined in the block.: expectParsedError 1`] = ` Object { "alertResult": Array [], diff --git a/src/ec-evaluator/__tests__/__snapshots__/ec-evaluator.ts.snap b/src/ec-evaluator/__tests__/__snapshots__/ec-evaluator.ts.snap index def387450..3e6ee19ea 100644 --- a/src/ec-evaluator/__tests__/__snapshots__/ec-evaluator.ts.snap +++ b/src/ec-evaluator/__tests__/__snapshots__/ec-evaluator.ts.snap @@ -1,5 +1,19 @@ // Jest Snapshot v1, https://goo.gl/fbAQLP +exports[`Imports are properly handled: expectResult 1`] = ` +Object { + "alertResult": Array [], + "code": "import { foo } from 'one_module'; +foo();", + "displayResult": Array [], + "numErrors": 0, + "parsedErrors": "", + "result": "foo", + "resultStatus": "finished", + "visualiseListResult": Array [], +} +`; + exports[`Simple tail call returns work: expectResult 1`] = ` Object { "alertResult": Array [], diff --git a/src/ec-evaluator/__tests__/ec-evaluator-errors.ts b/src/ec-evaluator/__tests__/ec-evaluator-errors.ts index a155d388e..8bda11765 100644 --- a/src/ec-evaluator/__tests__/ec-evaluator-errors.ts +++ b/src/ec-evaluator/__tests__/ec-evaluator-errors.ts @@ -1,4 +1,6 @@ /* tslint:disable:max-line-length */ +import * as _ from 'lodash' + import { Chapter, Variant } from '../../types' import { stripIndent } from '../../utils/formatters' import { @@ -8,6 +10,20 @@ import { expectResult } from '../../utils/testing' +jest.spyOn(_, 'memoize').mockImplementation(func => func as any) + +const mockXMLHttpRequest = (xhr: Partial = {}) => { + const xhrMock: Partial = { + open: jest.fn(() => {}), + send: jest.fn(() => {}), + status: 200, + responseText: 'Hello World!', + ...xhr + } + jest.spyOn(window, 'XMLHttpRequest').mockImplementationOnce(() => xhrMock as XMLHttpRequest) + return xhrMock +} + const undefinedVariable = stripIndent` im_undefined; ` @@ -1000,3 +1016,30 @@ test('Shadowed variables may not be assigned to until declared in the current sc optionEC3 ).toMatchInlineSnapshot(`"Line 3: Name variable not declared."`) }) + +test('Importing unknown variables throws UndefinedImport error', () => { + // for getModuleFile + mockXMLHttpRequest({ responseText: `{ + "one_module": { + "tabs": [] + }, + "another_module": { + "tabs": [] + } + }` }) + + // for bundle body + mockXMLHttpRequest({ + responseText: ` + function() { + return { + foo: () => 'foo', + } + } + ` + }) + + return expectParsedError(stripIndent` + import { foo1 } from 'one_module'; + `, optionEC).toMatchInlineSnapshot('"\'one_module\' does not contain a definition for \'foo1\'"') +}) diff --git a/src/ec-evaluator/__tests__/ec-evaluator.ts b/src/ec-evaluator/__tests__/ec-evaluator.ts index b4000d7f3..1bc656aad 100644 --- a/src/ec-evaluator/__tests__/ec-evaluator.ts +++ b/src/ec-evaluator/__tests__/ec-evaluator.ts @@ -2,6 +2,24 @@ import { Chapter, Variant } from '../../types' import { stripIndent } from '../../utils/formatters' import { expectResult } from '../../utils/testing' +// jest.mock('lodash', () => ({ +// ...jest.requireActual('lodash'), +// memoize: jest.fn(func => func) +// })) + +const mockXMLHttpRequest = (xhr: Partial = {}) => { + const xhrMock: Partial = { + open: jest.fn(() => {}), + send: jest.fn(() => {}), + status: 200, + responseText: 'Hello World!', + ...xhr + } + jest.spyOn(window, 'XMLHttpRequest').mockImplementationOnce(() => xhrMock as XMLHttpRequest) + return xhrMock +} + + const optionEC = { variant: Variant.EXPLICIT_CONTROL } const optionEC3 = { chapter: Chapter.SOURCE_3, variant: Variant.EXPLICIT_CONTROL } const optionEC4 = { chapter: Chapter.SOURCE_4, variant: Variant.EXPLICIT_CONTROL } @@ -297,3 +315,31 @@ test('streams can be created and functions with no return statements are still e optionEC4 ).toMatchInlineSnapshot(`false`) }) + +test('Imports are properly handled', () => { + // for getModuleFile + mockXMLHttpRequest({ responseText: `{ + "one_module": { + "tabs": [] + }, + "another_module": { + "tabs": [] + } + }` }) + + // for bundle body + mockXMLHttpRequest({ + responseText: ` + function() { + return { + foo: () => 'foo', + } + } + ` + }) + + return expectResult(stripIndent` + import { foo } from 'one_module'; + foo(); + `, optionEC).toEqual('foo') +}) diff --git a/src/ec-evaluator/interpreter.ts b/src/ec-evaluator/interpreter.ts index 689172b0d..98f235344 100644 --- a/src/ec-evaluator/interpreter.ts +++ b/src/ec-evaluator/interpreter.ts @@ -176,6 +176,7 @@ function evaluateImports( } } } catch (error) { + // console.log(error) handleRuntimeError(context, error) } diff --git a/src/interpreter/__tests__/interpreter-errors.ts b/src/interpreter/__tests__/interpreter-errors.ts index 056b9ccad..aad7f7539 100644 --- a/src/interpreter/__tests__/interpreter-errors.ts +++ b/src/interpreter/__tests__/interpreter-errors.ts @@ -1,4 +1,8 @@ + +// import type { FunctionLike, MockedFunction } from 'jest-mock' + /* tslint:disable:max-line-length */ +// import { memoizedGetModuleManifest } from '../../modules/moduleLoader' import { Chapter } from '../../types' import { stripIndent } from '../../utils/formatters' import { @@ -8,6 +12,27 @@ import { expectResult } from '../../utils/testing' +jest.mock('../../modules/moduleLoader', () => ({ + ...jest.requireActual('../../modules/moduleLoader'), + memoizedGetModuleFile: jest.fn().mockReturnValue(`function() { + return { + foo: () => undefined, + bar: () => undefined, + } + }`), + memoizedGetModuleManifest: jest.fn().mockReturnValue({ + one_module: { + tabs: [] + }, + another_module: { + tabs: [], + }, + }), +})) + +// const asMock = (func: T) => func as MockedFunction +// const mockedModuleFile = asMock(memoizedGetModuleFile) + const undefinedVariable = stripIndent` im_undefined; ` @@ -1117,3 +1142,9 @@ test('Cascading js errors work properly', () => { `"Line 2: Error: head(xs) expects a pair as argument xs, but encountered null"` ) }) + +test('Importing unknown variables throws error', () => { + expectParsedError(stripIndent` + import { foo1 } from 'one_module'; + `).toMatchInlineSnapshot('\'one_module\' does not contain definitions for \'foo1\'') +}) diff --git a/src/transpiler/__tests__/modules.ts b/src/transpiler/__tests__/modules.ts index 83679e1b0..2a0effe54 100644 --- a/src/transpiler/__tests__/modules.ts +++ b/src/transpiler/__tests__/modules.ts @@ -1,6 +1,9 @@ import type { Identifier, Literal, MemberExpression, VariableDeclaration } from 'estree' +import type { FunctionLike, MockedFunction } from 'jest-mock' import { mockContext } from '../../mocks/context' +import { UndefinedImportError } from '../../modules/errors' +import { memoizedGetModuleFile } from '../../modules/moduleLoader' import { parse } from '../../parser/parser' import { Chapter } from '../../types' import { stripIndent } from '../../utils/formatters' @@ -8,10 +11,29 @@ import { transformImportDeclarations, transpile } from '../transpiler' jest.mock('../../modules/moduleLoader', () => ({ ...jest.requireActual('../../modules/moduleLoader'), - memoizedGetModuleFile: () => 'undefined;' + memoizedGetModuleFile: jest.fn(), + memoizedGetModuleManifest: jest.fn().mockReturnValue({ + one_module: { + tabs: [] + }, + another_module: { + tabs: [], + }, + }), })) +const asMock = (func: T) => func as MockedFunction +const mockedModuleFile = asMock(memoizedGetModuleFile) + test('Transform import declarations into variable declarations', () => { + mockedModuleFile.mockImplementation((name, type) => { + if (type === 'json') { + return name === 'one_module' ? '{ foo: \'foo\' }' : '{ bar: \'bar\' }' + } else { + return 'undefined' + } + }) + const code = stripIndent` import { foo } from "test/one_module"; import { bar } from "test/another_module"; @@ -29,6 +51,14 @@ test('Transform import declarations into variable declarations', () => { }) test('Transpiler accounts for user variable names when transforming import statements', () => { + mockedModuleFile.mockImplementation((name, type) => { + if (type === 'json') { + return name === 'one_module' ? '{ foo: \'foo\' }' : '{ bar: \'bar\' }' + } else { + return 'undefined' + } + }) + const code = stripIndent` import { foo } from "test/one_module"; import { bar } from "test/another_module"; @@ -62,11 +92,42 @@ test('Transpiler accounts for user variable names when transforming import state }) test('checkForUndefinedVariables accounts for import statements', () => { + mockedModuleFile.mockImplementation((name, type) => { + if (type === 'json') { + return '{ hello: \'hello\' }' + } else { + return 'undefined' + } + }) + const code = stripIndent` - import { hello } from "module"; + import { hello } from "one_module"; hello; ` const context = mockContext(Chapter.SOURCE_4) const program = parse(code, context)! transpile(program, context, false) }) + +test('importing undefined variables should throw errors', () => { + mockedModuleFile.mockImplementation((name, type) => { + if (type === 'json') { + return '{}' + } else { + return 'undefined' + } + }) + + const code = stripIndent` + import { hello } from 'one_module'; + ` + const context = mockContext(Chapter.SOURCE_4) + const program = parse(code, context)! + try { + transpile(program, context, false) + } catch (error) { + expect(error).toBeInstanceOf(UndefinedImportError) + expect((error as UndefinedImportError).symbol) + .toEqual('hello') + } +}) diff --git a/src/transpiler/transpiler.ts b/src/transpiler/transpiler.ts index 80e255827..0c7d648ce 100644 --- a/src/transpiler/transpiler.ts +++ b/src/transpiler/transpiler.ts @@ -105,21 +105,6 @@ export function transformImportDeclarations( return [prefix.join(''), declNodes, otherNodes] } -// `useThis` is a temporary indicator used by fullJS -// export function transformImportDeclarations(program: es.Program, useThis = false) { -// const imports = [] -// let result: es.VariableDeclaration[] = [] -// let moduleCounter = 0 -// while (program.body.length > 0 && program.body[0].type === 'ImportDeclaration') { -// imports.push(program.body.shift() as es.ImportDeclaration) -// } -// for (const node of imports) { -// result = transformSingleImportDeclaration(moduleCounter, node, useThis).concat(result) -// moduleCounter++ -// } -// program.body = (result as (es.Statement | es.ModuleDeclaration)[]).concat(program.body) -// } - export function getGloballyDeclaredIdentifiers(program: es.Program): string[] { return program.body .filter(statement => statement.type === 'VariableDeclaration') From 92a96b37bd6782507d5fb92ce8f04e8eff44fe55 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Wed, 29 Mar 2023 17:43:06 +0800 Subject: [PATCH 06/95] Run format --- .../__tests__/ec-evaluator-errors.ts | 13 +++++++--- src/ec-evaluator/__tests__/ec-evaluator.ts | 16 +++++++----- .../__tests__/interpreter-errors.ts | 9 +++---- src/transpiler/__tests__/modules.ts | 25 +++++++++---------- 4 files changed, 35 insertions(+), 28 deletions(-) diff --git a/src/ec-evaluator/__tests__/ec-evaluator-errors.ts b/src/ec-evaluator/__tests__/ec-evaluator-errors.ts index 8bda11765..14cfdc5b2 100644 --- a/src/ec-evaluator/__tests__/ec-evaluator-errors.ts +++ b/src/ec-evaluator/__tests__/ec-evaluator-errors.ts @@ -1019,14 +1019,16 @@ test('Shadowed variables may not be assigned to until declared in the current sc test('Importing unknown variables throws UndefinedImport error', () => { // for getModuleFile - mockXMLHttpRequest({ responseText: `{ + mockXMLHttpRequest({ + responseText: `{ "one_module": { "tabs": [] }, "another_module": { "tabs": [] } - }` }) + }` + }) // for bundle body mockXMLHttpRequest({ @@ -1039,7 +1041,10 @@ test('Importing unknown variables throws UndefinedImport error', () => { ` }) - return expectParsedError(stripIndent` + return expectParsedError( + stripIndent` import { foo1 } from 'one_module'; - `, optionEC).toMatchInlineSnapshot('"\'one_module\' does not contain a definition for \'foo1\'"') + `, + optionEC + ).toMatchInlineSnapshot("\"'one_module' does not contain a definition for 'foo1'\"") }) diff --git a/src/ec-evaluator/__tests__/ec-evaluator.ts b/src/ec-evaluator/__tests__/ec-evaluator.ts index 1bc656aad..f3a56246d 100644 --- a/src/ec-evaluator/__tests__/ec-evaluator.ts +++ b/src/ec-evaluator/__tests__/ec-evaluator.ts @@ -19,7 +19,6 @@ const mockXMLHttpRequest = (xhr: Partial = {}) => { return xhrMock } - const optionEC = { variant: Variant.EXPLICIT_CONTROL } const optionEC3 = { chapter: Chapter.SOURCE_3, variant: Variant.EXPLICIT_CONTROL } const optionEC4 = { chapter: Chapter.SOURCE_4, variant: Variant.EXPLICIT_CONTROL } @@ -318,14 +317,16 @@ test('streams can be created and functions with no return statements are still e test('Imports are properly handled', () => { // for getModuleFile - mockXMLHttpRequest({ responseText: `{ + mockXMLHttpRequest({ + responseText: `{ "one_module": { "tabs": [] }, "another_module": { "tabs": [] } - }` }) + }` + }) // for bundle body mockXMLHttpRequest({ @@ -336,10 +337,13 @@ test('Imports are properly handled', () => { } } ` - }) + }) - return expectResult(stripIndent` + return expectResult( + stripIndent` import { foo } from 'one_module'; foo(); - `, optionEC).toEqual('foo') + `, + optionEC + ).toEqual('foo') }) diff --git a/src/interpreter/__tests__/interpreter-errors.ts b/src/interpreter/__tests__/interpreter-errors.ts index aad7f7539..3319dabaf 100644 --- a/src/interpreter/__tests__/interpreter-errors.ts +++ b/src/interpreter/__tests__/interpreter-errors.ts @@ -1,4 +1,3 @@ - // import type { FunctionLike, MockedFunction } from 'jest-mock' /* tslint:disable:max-line-length */ @@ -25,9 +24,9 @@ jest.mock('../../modules/moduleLoader', () => ({ tabs: [] }, another_module: { - tabs: [], - }, - }), + tabs: [] + } + }) })) // const asMock = (func: T) => func as MockedFunction @@ -1146,5 +1145,5 @@ test('Cascading js errors work properly', () => { test('Importing unknown variables throws error', () => { expectParsedError(stripIndent` import { foo1 } from 'one_module'; - `).toMatchInlineSnapshot('\'one_module\' does not contain definitions for \'foo1\'') + `).toMatchInlineSnapshot("'one_module' does not contain definitions for 'foo1'") }) diff --git a/src/transpiler/__tests__/modules.ts b/src/transpiler/__tests__/modules.ts index 2a0effe54..a4dd7ebba 100644 --- a/src/transpiler/__tests__/modules.ts +++ b/src/transpiler/__tests__/modules.ts @@ -17,22 +17,22 @@ jest.mock('../../modules/moduleLoader', () => ({ tabs: [] }, another_module: { - tabs: [], - }, - }), + tabs: [] + } + }) })) const asMock = (func: T) => func as MockedFunction const mockedModuleFile = asMock(memoizedGetModuleFile) test('Transform import declarations into variable declarations', () => { - mockedModuleFile.mockImplementation((name, type) => { + mockedModuleFile.mockImplementation((name, type) => { if (type === 'json') { - return name === 'one_module' ? '{ foo: \'foo\' }' : '{ bar: \'bar\' }' + return name === 'one_module' ? "{ foo: 'foo' }" : "{ bar: 'bar' }" } else { return 'undefined' } - }) + }) const code = stripIndent` import { foo } from "test/one_module"; @@ -53,7 +53,7 @@ test('Transform import declarations into variable declarations', () => { test('Transpiler accounts for user variable names when transforming import statements', () => { mockedModuleFile.mockImplementation((name, type) => { if (type === 'json') { - return name === 'one_module' ? '{ foo: \'foo\' }' : '{ bar: \'bar\' }' + return name === 'one_module' ? "{ foo: 'foo' }" : "{ bar: 'bar' }" } else { return 'undefined' } @@ -94,11 +94,11 @@ test('Transpiler accounts for user variable names when transforming import state test('checkForUndefinedVariables accounts for import statements', () => { mockedModuleFile.mockImplementation((name, type) => { if (type === 'json') { - return '{ hello: \'hello\' }' + return "{ hello: 'hello' }" } else { return 'undefined' } - }) + }) const code = stripIndent` import { hello } from "one_module"; @@ -110,13 +110,13 @@ test('checkForUndefinedVariables accounts for import statements', () => { }) test('importing undefined variables should throw errors', () => { - mockedModuleFile.mockImplementation((name, type) => { + mockedModuleFile.mockImplementation((name, type) => { if (type === 'json') { return '{}' } else { return 'undefined' } - }) + }) const code = stripIndent` import { hello } from 'one_module'; @@ -127,7 +127,6 @@ test('importing undefined variables should throw errors', () => { transpile(program, context, false) } catch (error) { expect(error).toBeInstanceOf(UndefinedImportError) - expect((error as UndefinedImportError).symbol) - .toEqual('hello') + expect((error as UndefinedImportError).symbol).toEqual('hello') } }) From 8d4f32715fdf9d009c0c05b6b8b548b4cf4931a9 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Thu, 30 Mar 2023 22:07:22 +0800 Subject: [PATCH 07/95] Add require provider --- src/constants.ts | 1 + src/infiniteLoops/runtime.ts | 6 +++-- src/modules/__tests__/requireProvider.ts | 29 +++++++++++++++++++++ src/modules/moduleLoader.ts | 18 ++++++------- src/modules/moduleTypes.ts | 6 +++-- src/modules/requireProvider.ts | 33 ++++++++++++++++++++++++ src/runner/fullJSRunner.ts | 14 +++++++--- src/transpiler/evalContainer.ts | 11 ++++---- 8 files changed, 95 insertions(+), 23 deletions(-) create mode 100644 src/modules/__tests__/requireProvider.ts create mode 100644 src/modules/requireProvider.ts diff --git a/src/constants.ts b/src/constants.ts index fe670b904..bbaedd5b8 100644 --- a/src/constants.ts +++ b/src/constants.ts @@ -6,6 +6,7 @@ import { Chapter, Language, Variant } from './types' export const DEFAULT_ECMA_VERSION = 6 export const ACORN_PARSE_OPTIONS: AcornOptions = { ecmaVersion: DEFAULT_ECMA_VERSION } +export const REQUIRE_PROVIDER_ID = 'requireProvider' export const CUT = 'cut' // cut operator for Source 4.3 export const TRY_AGAIN = 'retry' // command for Source 4.3 export const GLOBAL = typeof window === 'undefined' ? global : window diff --git a/src/infiniteLoops/runtime.ts b/src/infiniteLoops/runtime.ts index 04549a097..9a0edce78 100644 --- a/src/infiniteLoops/runtime.ts +++ b/src/infiniteLoops/runtime.ts @@ -1,6 +1,8 @@ import * as es from 'estree' +import { REQUIRE_PROVIDER_ID } from '../constants' import createContext from '../createContext' +import { getRequireProvider } from '../modules/requireProvider' import { parse } from '../parser/parser' import * as stdList from '../stdlib/list' import { Chapter, Variant } from '../types' @@ -319,13 +321,13 @@ export function testForInfiniteLoop(program: es.Program, previousProgramsStack: functionsId, stateId, builtinsId, - 'ctx', + REQUIRE_PROVIDER_ID, // redeclare window so modules don't do anything funny like play sounds '{let window = {}; return eval(code)}' ) try { - sandboxedRun(instrumentedCode, functions, state, newBuiltins, { context }) + sandboxedRun(instrumentedCode, functions, state, newBuiltins, getRequireProvider(context)) } catch (error) { if (error instanceof InfiniteLoopError) { if (state.lastLocation !== undefined) { diff --git a/src/modules/__tests__/requireProvider.ts b/src/modules/__tests__/requireProvider.ts new file mode 100644 index 000000000..302622bab --- /dev/null +++ b/src/modules/__tests__/requireProvider.ts @@ -0,0 +1,29 @@ +import { mockContext } from '../../mocks/context' +import { Chapter } from '../../types' +import { getRequireProvider } from '../requireProvider' + +jest.mock('../../stdlib', () => ({ + bar: jest.fn().mockReturnValue('bar'), + list: { + foo: jest.fn().mockReturnValue('foo') + } +})) + +const context = mockContext(Chapter.SOURCE_4) +const provider = getRequireProvider(context) + +test('Single segment', () => { + expect(provider('js-slang/context')).toBe(context) +}) + +test('Multiple segments', () => { + expect(provider('js-slang/dist/stdlib').bar()).toEqual('bar') + + expect(provider('js-slang/dist/stdlib/list').foo()).toEqual('foo') +}) + +test('Provider should throw an error if an unknown import is requested', () => { + expect(() => provider('something')).toThrow( + new Error('Dynamic require of something is not supported') + ) +}) diff --git a/src/modules/moduleLoader.ts b/src/modules/moduleLoader.ts index eaa8e0133..2801ce81a 100644 --- a/src/modules/moduleLoader.ts +++ b/src/modules/moduleLoader.ts @@ -8,7 +8,9 @@ import { ModuleNotFoundError } from '../errors/moduleErrors' import { Context } from '../types' -import { ModuleBundle, ModuleFunctions, Modules } from './moduleTypes' +import { wrapSourceModule } from '../utils/operators' +import { ModuleBundle, ModuleDocumentation, ModuleFunctions, Modules } from './moduleTypes' +import { getRequireProvider } from './requireProvider' // Supports both JSDom (Web Browser) environment and Node environment export const newHttpRequest = () => @@ -78,11 +80,11 @@ export function loadModuleBundle(path: string, context: Context, node?: es.Node) // Get module file const moduleText = memoizedGetModuleFile(path, 'bundle') try { - const moduleBundle: ModuleBundle = eval(`(${moduleText})`) - return moduleBundle({ context }) + const moduleBundle: ModuleBundle = eval(moduleText) + return wrapSourceModule(path, moduleBundle, getRequireProvider(context)) } catch (error) { // console.error("bundle error: ", error) - throw new ModuleInternalError(path, node) + throw new ModuleInternalError(path, error, node) } } @@ -108,15 +110,11 @@ export function loadModuleTabs(path: string, node?: es.Node) { return eval(rawTabFile) } catch (error) { // console.error('tab error:', error); - throw new ModuleInternalError(path, node) + throw new ModuleInternalError(path, error, node) } }) } -type Documentation = { - [name: string]: string -} - export const memoizedloadModuleDocs = memoize(loadModuleDocs) export function loadModuleDocs(path: string, node?: es.Node) { try { @@ -125,7 +123,7 @@ export function loadModuleDocs(path: string, node?: es.Node) { const moduleList = Object.keys(modules) if (!moduleList.includes(path)) throw new ModuleNotFoundError(path, node) const result = getModuleFile({ name: path, type: 'json' }) - return JSON.parse(result) as Documentation + return JSON.parse(result) as ModuleDocumentation } catch (error) { console.warn('Failed to load module documentation') return null diff --git a/src/modules/moduleTypes.ts b/src/modules/moduleTypes.ts index cc105208f..974f27de4 100644 --- a/src/modules/moduleTypes.ts +++ b/src/modules/moduleTypes.ts @@ -1,4 +1,4 @@ -import type { Context } from '../types' +import type { RequireProvider } from './requireProvider' export type Modules = { [module: string]: { @@ -6,8 +6,10 @@ export type Modules = { } } -export type ModuleBundle = (context: { context: Context }) => ModuleFunctions +export type ModuleBundle = (require: RequireProvider) => ModuleFunctions export type ModuleFunctions = { [functionName: string]: Function } + +export type ModuleDocumentation = Record diff --git a/src/modules/requireProvider.ts b/src/modules/requireProvider.ts new file mode 100644 index 000000000..b7e0ab677 --- /dev/null +++ b/src/modules/requireProvider.ts @@ -0,0 +1,33 @@ +import * as jsslang from '..' +import * as stdlib from '../stdlib' +import type { Context } from '../types' + +/** + * Returns a function that simulates the job of Node's `require`. The require + * provider is then used by Source modules to access the context and js-slang standard + * library + */ +export const getRequireProvider = (context: Context) => (x: string) => { + const pathSegments = x.split('/') + + const recurser = (obj: Record, segments: string[]): any => { + if (segments.length === 0) return obj + const currObj = obj[segments[0]] + if (currObj !== undefined) return recurser(currObj, segments.splice(1)) + throw new Error(`Dynamic require of ${x} is not supported`) + } + + const exports = { + 'js-slang': { + dist: { + ...jsslang, + stdlib + }, + context + } + } + + return recurser(exports, pathSegments) +} + +export type RequireProvider = ReturnType diff --git a/src/runner/fullJSRunner.ts b/src/runner/fullJSRunner.ts index b09e75f51..4924d6de5 100644 --- a/src/runner/fullJSRunner.ts +++ b/src/runner/fullJSRunner.ts @@ -7,14 +7,19 @@ import { IOptions, Result } from '..' import { NATIVE_STORAGE_ID } from '../constants' import { RuntimeSourceError } from '../errors/runtimeSourceError' import { hoistAndMergeImports } from '../localImports/transformers/hoistAndMergeImports' +import { getRequireProvider, RequireProvider } from '../modules/requireProvider' import { parse } from '../parser/parser' import { evallerReplacer, getBuiltins, transpile } from '../transpiler/transpiler' -import type { Context } from '../types' +import type { Context, NativeStorage } from '../types' import * as create from '../utils/astCreator' import { toSourceError } from './errors' import { appendModulesToContext, resolvedErrorPromise } from './utils' -function fullJSEval(code: string, { nativeStorage, ...ctx }: Context): any { +function fullJSEval( + code: string, + requireProvider: RequireProvider, + nativeStorage: NativeStorage +): any { if (nativeStorage.evaller) { return nativeStorage.evaller(code) } else { @@ -65,7 +70,8 @@ export async function fullJSRunner( evallerReplacer(create.identifier(NATIVE_STORAGE_ID), new Set()) ]) const preEvalCode: string = generate(preEvalProgram) - await fullJSEval(preEvalCode, context) + const requireProvider = getRequireProvider(context) + await fullJSEval(preEvalCode, requireProvider, context.nativeStorage) let transpiled let sourceMapJson: RawSourceMap | undefined @@ -74,7 +80,7 @@ export async function fullJSRunner( return Promise.resolve({ status: 'finished', context, - value: await fullJSEval(transpiled, context) + value: await fullJSEval(transpiled, requireProvider, context.nativeStorage) }) } catch (error) { context.errors.push( diff --git a/src/transpiler/evalContainer.ts b/src/transpiler/evalContainer.ts index ec46df14d..71e12ba4f 100644 --- a/src/transpiler/evalContainer.ts +++ b/src/transpiler/evalContainer.ts @@ -1,7 +1,8 @@ -import { NATIVE_STORAGE_ID } from '../constants' -import type { Context } from '../types' +import { NATIVE_STORAGE_ID, REQUIRE_PROVIDER_ID } from '../constants' +import { RequireProvider } from '../modules/requireProvider' +import { NativeStorage } from '../types' -type Evaler = (code: string, context: Context) => any +type Evaler = (code: string, req: RequireProvider, nativeStorage: NativeStorage) => any /* We need to use new Function here to ensure that the parameter names do not get @@ -10,9 +11,9 @@ type Evaler = (code: string, context: Context) => any export const sandboxedEval: Evaler = new Function( 'code', - 'ctx', + REQUIRE_PROVIDER_ID, + NATIVE_STORAGE_ID, ` - ({ ${NATIVE_STORAGE_ID}, ...ctx } = ctx); if (${NATIVE_STORAGE_ID}.evaller === null) { return eval(code); } else { From db37dfc6d16e2d9877237d1c470a2f53e7a0ea36 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Thu, 30 Mar 2023 22:10:50 +0800 Subject: [PATCH 08/95] Improve error handling --- src/ec-evaluator/interpreter.ts | 4 ++-- src/ec-evaluator/types.ts | 4 +++- src/errors/moduleErrors.ts | 2 +- 3 files changed, 6 insertions(+), 4 deletions(-) diff --git a/src/ec-evaluator/interpreter.ts b/src/ec-evaluator/interpreter.ts index 98f235344..e55030f46 100644 --- a/src/ec-evaluator/interpreter.ts +++ b/src/ec-evaluator/interpreter.ts @@ -107,7 +107,7 @@ export function evaluate(program: es.Program, context: Context): Value { return runECEMachine(context, context.runtime.agenda, context.runtime.stash) } catch (error) { // console.error('ecerror:', error) - return new ECError() + return new ECError(error) } finally { context.runtime.isRunning = false } @@ -126,7 +126,7 @@ export function resumeEvaluate(context: Context) { context.runtime.isRunning = true return runECEMachine(context, context.runtime.agenda!, context.runtime.stash!) } catch (error) { - return new ECError() + return new ECError(error) } finally { context.runtime.isRunning = false } diff --git a/src/ec-evaluator/types.ts b/src/ec-evaluator/types.ts index 46789f1be..fe45bd509 100644 --- a/src/ec-evaluator/types.ts +++ b/src/ec-evaluator/types.ts @@ -105,4 +105,6 @@ export class ECEBreak {} // Special value that cannot be found on the stash so is safe to be used // as an indicator of an error from running the ECE machine -export class ECError {} +export class ECError { + constructor(public readonly error: any) {} +} diff --git a/src/errors/moduleErrors.ts b/src/errors/moduleErrors.ts index 33f0ce5fd..683d6089a 100644 --- a/src/errors/moduleErrors.ts +++ b/src/errors/moduleErrors.ts @@ -36,7 +36,7 @@ export class ModuleNotFoundError extends RuntimeSourceError { } export class ModuleInternalError extends RuntimeSourceError { - constructor(public moduleName: string, node?: es.Node) { + constructor(public moduleName: string, public error?: any, node?: es.Node) { super(node) } From 829a688a2a37c91d585c6c6d58d5f05409aed413 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Thu, 30 Mar 2023 22:12:27 +0800 Subject: [PATCH 09/95] Make stdlib available --- src/stdlib/index.ts | 78 +++++++++++++++++++++++++++++++++++++++++++++ src/stdlib/list.ts | 18 +++++++++++ 2 files changed, 96 insertions(+) create mode 100644 src/stdlib/index.ts diff --git a/src/stdlib/index.ts b/src/stdlib/index.ts new file mode 100644 index 000000000..d8d1fc3be --- /dev/null +++ b/src/stdlib/index.ts @@ -0,0 +1,78 @@ +import createContext from '../createContext' +import { Chapter, Value } from '../types' +import * as list from './list' +import * as misc from './misc' +import * as parser from './parser' +import * as stream from './stream' + +export const chapter_1 = { + get_time: misc.error_message, + error_message: misc.error_message, + is_number: misc.is_number, + is_string: misc.is_string, + is_function: misc.is_function, + is_boolean: misc.is_boolean, + is_undefined: misc.is_undefined, + parse_int: misc.parse_int, + char_at: misc.char_at, + arity: misc.arity, + undefined: undefined, + NaN: NaN, + Infinity: Infinity +} + +export const chapter_2 = { + ...chapter_1, + pair: list.pair, + is_pair: list.is_pair, + head: list.head, + tail: list.tail, + is_null: list.is_null, + list: list.list, + // defineBuiltin(context, 'draw_data(...xs)', visualiseList, 1) + // defineBuiltin(context, 'display_list(val, prepend = undefined)', displayList, 0) + is_list: list.is_list +} + +export const chapter_3 = { + ...chapter_2, + set_head: list.set_head, + set_tail: list.set_tail, + array_length: misc.array_length, + is_array: misc.is_array, + + // Stream library + stream_tail: stream.stream_tail, + stream: stream.stream +} + +export const chapter_4 = { + ...chapter_3, + parse: (str: string, chapter: Chapter) => parser.parse(str, createContext(chapter)), + tokenize: (str: string, chapter: Chapter) => parser.tokenize(str, createContext(chapter)), + // tslint:disable-next-line:ban-types + apply_in_underlying_javascript: (fun: Function, args: Value) => + fun.apply(fun, list.list_to_vector(args)) +} + +export const chapter_library_parser = { + ...chapter_4, + is_object: misc.is_object, + is_NaN: misc.is_NaN, + has_own_property: misc.has_own_property + // defineBuiltin(context, 'alert(val)', alert) + // tslint:disable-next-line:ban-types + // timed: (f: Function: context: Context) => misc.timed(context, f, context.externalContext, externalBuiltIns.rawDisplay), +} + +export default { + [Chapter.SOURCE_1]: chapter_1, + [Chapter.SOURCE_2]: chapter_2, + [Chapter.SOURCE_3]: chapter_3, + [Chapter.SOURCE_4]: chapter_4, + [Chapter.LIBRARY_PARSER]: chapter_library_parser +} + +export * as list from './list' +export * as misc from './misc' +export * as stream from './stream' diff --git a/src/stdlib/list.ts b/src/stdlib/list.ts index 934f8c7a4..af91e2f3b 100644 --- a/src/stdlib/list.ts +++ b/src/stdlib/list.ts @@ -129,6 +129,24 @@ export function set_tail(xs: any, x: any) { } } +export function accumulate(acc: (each: T, result: U) => any, init: U, xs: List): U { + const recurser = (xs: List, result: U): U => { + if (is_null(xs)) return result + + return recurser(tail(xs), acc(head(xs), result)) + } + + return recurser(xs, init) +} + +export function length(xs: List): number { + if (!is_list(xs)) { + throw new Error('length(xs) expects a list') + } + + return accumulate((_, total) => total + 1, 0, xs) +} + export function rawDisplayList(display: any, xs: Value, prepend: string) { const visited: Set = new Set() // Everything is put into this set, values, arrays, and even objects if they exist const asListObjects: Map = new Map() // maps original list nodes to new list nodes From 4f9de1d807af097c4e4499bc833f558a7f74acd6 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Thu, 30 Mar 2023 22:14:23 +0800 Subject: [PATCH 10/95] Update module loading and tests --- .../__tests__/ec-evaluator-errors.ts | 2 +- src/ec-evaluator/__tests__/ec-evaluator.ts | 2 +- src/infiniteLoops/__tests__/runtime.ts | 4 +- src/infiniteLoops/runtime.ts | 2 +- src/modules/__tests__/moduleLoader.ts | 6 +- src/runner/sourceRunner.ts | 13 +- .../__snapshots__/transpiled-code.ts.snap | 2 + src/transpiler/__tests__/modules.ts | 20 +-- src/transpiler/transpiler.ts | 117 +++++++++++------- src/utils/operators.ts | 19 +++ 10 files changed, 112 insertions(+), 75 deletions(-) diff --git a/src/ec-evaluator/__tests__/ec-evaluator-errors.ts b/src/ec-evaluator/__tests__/ec-evaluator-errors.ts index 14cfdc5b2..b740d9405 100644 --- a/src/ec-evaluator/__tests__/ec-evaluator-errors.ts +++ b/src/ec-evaluator/__tests__/ec-evaluator-errors.ts @@ -1033,7 +1033,7 @@ test('Importing unknown variables throws UndefinedImport error', () => { // for bundle body mockXMLHttpRequest({ responseText: ` - function() { + require => { return { foo: () => 'foo', } diff --git a/src/ec-evaluator/__tests__/ec-evaluator.ts b/src/ec-evaluator/__tests__/ec-evaluator.ts index f3a56246d..da809d55f 100644 --- a/src/ec-evaluator/__tests__/ec-evaluator.ts +++ b/src/ec-evaluator/__tests__/ec-evaluator.ts @@ -331,7 +331,7 @@ test('Imports are properly handled', () => { // for bundle body mockXMLHttpRequest({ responseText: ` - function() { + require => { return { foo: () => 'foo', } diff --git a/src/infiniteLoops/__tests__/runtime.ts b/src/infiniteLoops/__tests__/runtime.ts index 22a70d065..4eb48dae8 100644 --- a/src/infiniteLoops/__tests__/runtime.ts +++ b/src/infiniteLoops/__tests__/runtime.ts @@ -12,7 +12,7 @@ import { testForInfiniteLoop } from '../runtime' jest.spyOn(moduleLoader, 'memoizedGetModuleFile').mockImplementationOnce(() => { return stripIndent` - (function () { + require => { 'use strict'; var exports = {}; function repeat(func, n) { @@ -35,7 +35,7 @@ jest.spyOn(moduleLoader, 'memoizedGetModuleFile').mockImplementationOnce(() => { value: true }); return exports; - }) + } ` }) diff --git a/src/infiniteLoops/runtime.ts b/src/infiniteLoops/runtime.ts index 9a0edce78..a9b81b95f 100644 --- a/src/infiniteLoops/runtime.ts +++ b/src/infiniteLoops/runtime.ts @@ -1,6 +1,6 @@ import * as es from 'estree' -import { REQUIRE_PROVIDER_ID } from '../constants' +import { REQUIRE_PROVIDER_ID } from '../constants' import createContext from '../createContext' import { getRequireProvider } from '../modules/requireProvider' import { parse } from '../parser/parser' diff --git a/src/modules/__tests__/moduleLoader.ts b/src/modules/__tests__/moduleLoader.ts index 1a7643d9f..d191d8fac 100644 --- a/src/modules/__tests__/moduleLoader.ts +++ b/src/modules/__tests__/moduleLoader.ts @@ -104,11 +104,9 @@ describe('Testing modules/moduleLoader.ts in a jsdom environment', () => { test('Loading a module bundle correctly', () => { const sampleManifest = `{ "module": { "tabs": [] } }` mockXMLHttpRequest({ responseText: sampleManifest }) - const sampleResponse = stripIndent`function () { - 'use strict'; - function make_empty_array () { return []; } + const sampleResponse = stripIndent`require => { return { - make_empty_array + make_empty_array: () => [] } }` mockXMLHttpRequest({ responseText: sampleResponse }) diff --git a/src/runner/sourceRunner.ts b/src/runner/sourceRunner.ts index f4c72da55..935dd8c7a 100644 --- a/src/runner/sourceRunner.ts +++ b/src/runner/sourceRunner.ts @@ -16,6 +16,7 @@ import { evaluateProgram as evaluate } from '../interpreter/interpreter' import { nonDetEvaluate } from '../interpreter/interpreter-non-det' import { transpileToLazy } from '../lazy/lazy' import preprocessFileImports from '../localImports/preprocessor' +import { getRequireProvider } from '../modules/requireProvider' import { parse } from '../parser/parser' import { AsyncScheduler, NonDetScheduler, PreemptiveScheduler } from '../schedulers' import { @@ -139,14 +140,6 @@ async function runNative( try { appendModulesToContext(transpiledProgram, context) - // Repl module "default_js_slang" function support (Wang Zihan) - if (context.moduleContexts['repl'] !== undefined) { - ;(context.moduleContexts['repl'] as any).js_slang = {} - ;(context.moduleContexts['repl'] as any).js_slang.sourceFilesRunner = sourceFilesRunner - if ((context.moduleContexts['repl'] as any).js_slang.context === undefined) - (context.moduleContexts['repl'] as any).js_slang.context = context - } - switch (context.variant) { case Variant.GPU: transpileToGPU(transpiledProgram) @@ -157,8 +150,7 @@ async function runNative( } ;({ transpiled, sourceMapJson } = transpile(transpiledProgram, context)) - // console.log(transpiled); - let value = await sandboxedEval(transpiled, context) + let value = await sandboxedEval(transpiled, getRequireProvider(context), context.nativeStorage) if (context.variant === Variant.LAZY) { value = forceIt(value) @@ -174,6 +166,7 @@ async function runNative( value }) } catch (error) { + // console.error(error) const isDefaultVariant = options.variant === undefined || options.variant === Variant.DEFAULT if (isDefaultVariant && isPotentialInfiniteLoop(error)) { const detectedInfiniteLoop = testForInfiniteLoop(program, context.previousPrograms.slice(1)) diff --git a/src/transpiler/__tests__/__snapshots__/transpiled-code.ts.snap b/src/transpiler/__tests__/__snapshots__/transpiled-code.ts.snap index c626a79b8..be58a65d2 100644 --- a/src/transpiler/__tests__/__snapshots__/transpiled-code.ts.snap +++ b/src/transpiler/__tests__/__snapshots__/transpiled-code.ts.snap @@ -85,6 +85,7 @@ exports[`Ensure no name clashes 1`] = ` const callIfFuncAndRightArgs0 = native0.operators.get(\\"callIfFuncAndRightArgs\\"); const boolOrErr0 = native0.operators.get(\\"boolOrErr\\"); const wrap90 = native0.operators.get(\\"wrap\\"); + const wrapSourceModule = native0.operators.get(\\"wrapSourceModule\\"); const unaryOp = native0.operators.get(\\"unaryOp\\"); const binaryOp = native0.operators.get(\\"binaryOp\\"); const throwIfTimeout = native0.operators.get(\\"throwIfTimeout\\"); @@ -201,6 +202,7 @@ Object { const callIfFuncAndRightArgs = native.operators.get(\\"callIfFuncAndRightArgs\\"); const boolOrErr = native.operators.get(\\"boolOrErr\\"); const wrap = native.operators.get(\\"wrap\\"); + const wrapSourceModule = native.operators.get(\\"wrapSourceModule\\"); const unaryOp = native.operators.get(\\"unaryOp\\"); const binaryOp = native.operators.get(\\"binaryOp\\"); const throwIfTimeout = native.operators.get(\\"throwIfTimeout\\"); diff --git a/src/transpiler/__tests__/modules.ts b/src/transpiler/__tests__/modules.ts index a4dd7ebba..c7b8c1ae2 100644 --- a/src/transpiler/__tests__/modules.ts +++ b/src/transpiler/__tests__/modules.ts @@ -19,6 +19,10 @@ jest.mock('../../modules/moduleLoader', () => ({ another_module: { tabs: [] } + }), + memoizedloadModuleDocs: jest.fn().mockReturnValue({ + foo: 'foo', + bar: 'bar' }) })) @@ -61,23 +65,23 @@ test('Transpiler accounts for user variable names when transforming import state const code = stripIndent` import { foo } from "test/one_module"; - import { bar } from "test/another_module"; - const __MODULE_0__ = 'test0'; - const __MODULE_2__ = 'test1'; + import { bar as __MODULE__2 } from "test/another_module"; + const __MODULE__ = 'test0'; + const __MODULE__0 = 'test1'; foo(bar); ` const context = mockContext(4) const program = parse(code, context)! const [, importNodes, [varDecl0, varDecl1]] = transformImportDeclarations( program, - new Set(['__MODULE_0__', '__MODULE_2__']), + new Set(['__MODULE__', '__MODULE__0']), false ) expect(importNodes[0].type).toBe('VariableDeclaration') expect( ((importNodes[0].declarations[0].init as MemberExpression).object as Identifier).name - ).toEqual('__MODULE_1__') + ).toEqual('__MODULE__1') expect(varDecl0.type).toBe('VariableDeclaration') expect(((varDecl0 as VariableDeclaration).declarations[0].init as Literal).value).toEqual('test0') @@ -88,7 +92,7 @@ test('Transpiler accounts for user variable names when transforming import state expect(importNodes[1].type).toBe('VariableDeclaration') expect( ((importNodes[1].declarations[0].init as MemberExpression).object as Identifier).name - ).toEqual('__MODULE_3__') + ).toEqual('__MODULE__3') }) test('checkForUndefinedVariables accounts for import statements', () => { @@ -101,8 +105,8 @@ test('checkForUndefinedVariables accounts for import statements', () => { }) const code = stripIndent` - import { hello } from "one_module"; - hello; + import { foo } from "one_module"; + foo; ` const context = mockContext(Chapter.SOURCE_4) const program = parse(code, context)! diff --git a/src/transpiler/transpiler.ts b/src/transpiler/transpiler.ts index 0c7d648ce..242aee7bc 100644 --- a/src/transpiler/transpiler.ts +++ b/src/transpiler/transpiler.ts @@ -4,10 +4,11 @@ import * as es from 'estree' import { partition } from 'lodash' import { RawSourceMap, SourceMapGenerator } from 'source-map' -import { NATIVE_STORAGE_ID, UNKNOWN_LOCATION } from '../constants' +import { NATIVE_STORAGE_ID, REQUIRE_PROVIDER_ID, UNKNOWN_LOCATION } from '../constants' import { UndefinedVariable } from '../errors/errors' import { UndefinedImportError } from '../modules/errors' import { memoizedGetModuleFile, memoizedloadModuleDocs } from '../modules/moduleLoader' +import { ModuleDocumentation } from '../modules/moduleTypes' import { AllowedDeclarations, Chapter, Context, NativeStorage, Variant } from '../types' import * as create from '../utils/astCreator' import { @@ -28,6 +29,7 @@ const globalIdNames = [ 'callIfFuncAndRightArgs', 'boolOrErr', 'wrap', + 'wrapSourceModule', 'unaryOp', 'binaryOp', 'throwIfTimeout', @@ -42,67 +44,84 @@ export function transformImportDeclarations( program: es.Program, usedIdentifiers: Set, checkImports: boolean, + nativeId?: es.Identifier, useThis: boolean = false ): [string, es.VariableDeclaration[], es.Program['body']] { - const prefix: string[] = [] const [importNodes, otherNodes] = partition( program.body, node => node.type === 'ImportDeclaration' ) - const moduleNames = new Map() - let moduleCount = 0 - - const declNodes = (importNodes as es.ImportDeclaration[]).flatMap(node => { - const moduleName = node.source.value as string - - let moduleNamespace: string - if (!moduleNames.has(moduleName)) { - // Increment module count until we reach an unused identifier - let namespaced = `__MODULE_${moduleCount}__` - while (usedIdentifiers.has(namespaced)) { - namespaced = `__MODULE_${moduleCount}__` - moduleCount++ - } - - // The module hasn't been added to the prefix yet, so do that - moduleNames.set(moduleName, namespaced) - moduleCount++ - const moduleText = memoizedGetModuleFile(moduleName, 'bundle').trim() - prefix.push(`const ${namespaced} = ${moduleText}({ context: ctx });\n`) - moduleNamespace = namespaced - } else { - moduleNamespace = moduleNames.get(moduleName)! - } - const moduleDocs: Record | null = checkImports - ? memoizedloadModuleDocs(moduleName, node) - : null + if (importNodes.length === 0) return ['', [], otherNodes] - return node.specifiers.map(specifier => { - if (specifier.type !== 'ImportSpecifier') { - throw new Error(`Expected import specifier, found: ${specifier.type}`) + const moduleInfos = importNodes.reduce( + (res, node: es.ImportDeclaration) => { + const moduleName = node.source.value + if (typeof moduleName !== 'string') { + throw new Error( + `Expected ImportDeclaration to have a source of type string, got ${moduleName}` + ) } - if (checkImports) { - if (!moduleDocs) { - console.warn(`Failed to load docs for ${moduleName}, skipping typechecking`) - } else if (!(specifier.imported.name in moduleDocs)) { - throw new UndefinedImportError(specifier.imported.name, moduleName, node) + if (!(moduleName in res)) { + res[moduleName] = { + text: memoizedGetModuleFile(moduleName, 'bundle'), + nodes: [], + docs: checkImports ? memoizedloadModuleDocs(moduleName, node) : null } } - // Convert each import specifier to its corresponding local variable declaration - return create.constantDeclaration( - specifier.local.name, - create.memberExpression( - create.identifier(`${useThis ? 'this.' : ''}${moduleNamespace}`), - specifier.imported.name + res[moduleName].nodes.push(node) + node.specifiers.forEach(spec => usedIdentifiers.add(spec.local.name)) + return res + }, + {} as Record< + string, + { + nodes: es.ImportDeclaration[] + text: string + docs: ModuleDocumentation | null + } + > + ) + + const prefix: string[] = [] + const declNodes = Object.entries(moduleInfos).flatMap(([moduleName, { nodes, text, docs }]) => { + const namespaced = getUniqueId(usedIdentifiers, '__MODULE__') + prefix.push(`// ${moduleName} module`) + + const modifiedText = nativeId + ? `${nativeId.name}.operators.get("wrapSourceModule")("${moduleName}", ${text}, ${REQUIRE_PROVIDER_ID})` + : `(${text})(${REQUIRE_PROVIDER_ID})` + prefix.push(`const ${namespaced} = ${modifiedText}\n`) + + return nodes.flatMap(node => + node.specifiers.map(specifier => { + if (specifier.type !== 'ImportSpecifier') { + throw new Error(`Expected import specifier, found: ${specifier.type}`) + } + + if (checkImports) { + if (!docs) { + console.warn(`Failed to load docs for ${moduleName}, skipping typechecking`) + } else if (!(specifier.imported.name in docs)) { + throw new UndefinedImportError(specifier.imported.name, moduleName, node) + } + } + + // Convert each import specifier to its corresponding local variable declaration + return create.constantDeclaration( + specifier.local.name, + create.memberExpression( + create.identifier(`${useThis ? 'this.' : ''}${namespaced}`), + specifier.imported.name + ) ) - ) - }) + }) + ) }) - return [prefix.join(''), declNodes, otherNodes] + return [prefix.join('\n'), declNodes, otherNodes] } export function getGloballyDeclaredIdentifiers(program: es.Program): string[] { @@ -612,7 +631,8 @@ function transpileToSource( const [modulePrefix, importNodes, otherNodes] = transformImportDeclarations( program, usedIdentifiers, - true + true, + globalIds.native ) program.body = (importNodes as es.Program['body']).concat(otherNodes) @@ -654,7 +674,8 @@ function transpileToFullJS( const [modulePrefix, importNodes, otherNodes] = transformImportDeclarations( program, usedIdentifiers, - false + false, + globalIds.native ) const transpiledProgram: es.Program = create.program([ diff --git a/src/utils/operators.ts b/src/utils/operators.ts index 884207a5a..321ee281e 100644 --- a/src/utils/operators.ts +++ b/src/utils/operators.ts @@ -12,6 +12,8 @@ import { PotentialInfiniteLoopError, PotentialInfiniteRecursionError } from '../errors/timeoutErrors' +import { ModuleBundle, ModuleFunctions } from '../modules/moduleTypes' +import { RequireProvider } from '../modules/requireProvider' import { Chapter, NativeStorage, Thunk } from '../types' import { callExpression, locationDummyNode } from './astCreator' import * as create from './astCreator' @@ -332,6 +334,23 @@ export const wrap = ( return wrapped } +export const wrapSourceModule = ( + moduleName: string, + moduleFunc: ModuleBundle, + requireProvider: RequireProvider +) => + Object.entries(moduleFunc(requireProvider)).reduce((res, [name, value]) => { + if (typeof value === 'function') { + const repr = `function ${name} {\n\t[Function from ${moduleName}\n\tImplementation hidden]\n}` + value[Symbol.toStringTag] = () => repr + value.toString = () => repr + } + return { + ...res, + [name]: value + } + }, {} as ModuleFunctions) + export const setProp = ( obj: any, prop: any, From 807b9ff07f18110a9ac2969b9199f34f2face2d3 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Thu, 30 Mar 2023 23:13:07 +0800 Subject: [PATCH 11/95] Fix require provider not properly providing js-slang --- src/modules/requireProvider.ts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/modules/requireProvider.ts b/src/modules/requireProvider.ts index b7e0ab677..c3b6b7f12 100644 --- a/src/modules/requireProvider.ts +++ b/src/modules/requireProvider.ts @@ -19,8 +19,8 @@ export const getRequireProvider = (context: Context) => (x: string) => { const exports = { 'js-slang': { + ...jsslang, dist: { - ...jsslang, stdlib }, context From c291838a08db90f6b13c9e54f70a7511904045f6 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Sat, 1 Apr 2023 15:02:38 +0800 Subject: [PATCH 12/95] Made EC evaluator and transpiler async on imports --- .../__tests__/ec-evaluator-errors.ts | 57 ++---- src/ec-evaluator/interpreter.ts | 94 ++++++---- src/infiniteLoops/__tests__/instrument.ts | 34 ++-- src/infiniteLoops/__tests__/runtime.ts | 92 ++++----- src/infiniteLoops/instrument.ts | 31 ++- src/infiniteLoops/runtime.ts | 9 +- src/interpreter/interpreter.ts | 48 +++-- src/modules/errors.ts | 27 +++ src/modules/moduleLoader.ts | 4 +- src/modules/moduleLoaderAsync.ts | 92 +++++++++ src/modules/moduleTypes.ts | 2 +- src/modules/utils.ts | 170 +++++++++++++++++ src/repl/transpiler.ts | 8 +- src/runner/fullJSRunner.ts | 10 +- src/runner/sourceRunner.ts | 23 ++- src/runner/utils.ts | 24 --- src/stdlib/list.ts | 14 +- src/stdlib/misc.ts | 8 +- src/transpiler/__tests__/modules.ts | 111 +++++------ src/transpiler/__tests__/transpiled-code.ts | 8 +- src/transpiler/transpiler.ts | 177 ++++++++++-------- src/utils/testing.ts | 2 +- 22 files changed, 695 insertions(+), 350 deletions(-) create mode 100644 src/modules/moduleLoaderAsync.ts create mode 100644 src/modules/utils.ts diff --git a/src/ec-evaluator/__tests__/ec-evaluator-errors.ts b/src/ec-evaluator/__tests__/ec-evaluator-errors.ts index b740d9405..1033c9e7a 100644 --- a/src/ec-evaluator/__tests__/ec-evaluator-errors.ts +++ b/src/ec-evaluator/__tests__/ec-evaluator-errors.ts @@ -1,6 +1,5 @@ /* tslint:disable:max-line-length */ -import * as _ from 'lodash' - +import * as moduleLoader from '../../modules/moduleLoaderAsync' import { Chapter, Variant } from '../../types' import { stripIndent } from '../../utils/formatters' import { @@ -10,19 +9,26 @@ import { expectResult } from '../../utils/testing' -jest.spyOn(_, 'memoize').mockImplementation(func => func as any) +jest.mock('lodash', () => ({ + ...jest.requireActual('lodash'), + memoize: jest.fn(f => f) +})) -const mockXMLHttpRequest = (xhr: Partial = {}) => { - const xhrMock: Partial = { - open: jest.fn(() => {}), - send: jest.fn(() => {}), - status: 200, - responseText: 'Hello World!', - ...xhr - } - jest.spyOn(window, 'XMLHttpRequest').mockImplementationOnce(() => xhrMock as XMLHttpRequest) - return xhrMock -} +jest.spyOn(moduleLoader, 'memoizedGetModuleManifestAsync').mockResolvedValue({ + one_module: { tabs: [] }, + another_module: { tabs: [] } +}) +jest.spyOn(moduleLoader, 'memoizedGetModuleBundleAsync').mockResolvedValue(` + require => ({ + foo: () => 'foo', + bar: () => 'bar' + }) +`) +jest + .spyOn(moduleLoader, 'memoizedGetModuleDocsAsync') + .mockImplementation(name => + Promise.resolve>(name === 'one_module' ? { foo: 'foo' } : { bar: 'bar' }) + ) const undefinedVariable = stripIndent` im_undefined; @@ -1018,29 +1024,6 @@ test('Shadowed variables may not be assigned to until declared in the current sc }) test('Importing unknown variables throws UndefinedImport error', () => { - // for getModuleFile - mockXMLHttpRequest({ - responseText: `{ - "one_module": { - "tabs": [] - }, - "another_module": { - "tabs": [] - } - }` - }) - - // for bundle body - mockXMLHttpRequest({ - responseText: ` - require => { - return { - foo: () => 'foo', - } - } - ` - }) - return expectParsedError( stripIndent` import { foo1 } from 'one_module'; diff --git a/src/ec-evaluator/interpreter.ts b/src/ec-evaluator/interpreter.ts index e55030f46..80eab1bba 100644 --- a/src/ec-evaluator/interpreter.ts +++ b/src/ec-evaluator/interpreter.ts @@ -13,9 +13,8 @@ import { UNKNOWN_LOCATION } from '../constants' import * as errors from '../errors/errors' import { RuntimeSourceError } from '../errors/runtimeSourceError' import Closure from '../interpreter/closure' -import { UndefinedImportError } from '../modules/errors' -import { loadModuleBundle, loadModuleTabs } from '../modules/moduleLoader' -import { ModuleFunctions } from '../modules/moduleTypes' +import { loadModuleBundleAsync } from '../modules/moduleLoaderAsync' +import { reduceImportNodesAsync } from '../modules/utils' import { checkEditorBreakpoints } from '../stdlib/inspector' import { Context, ContiguousArrayElements, Result, Value } from '../types' import * as ast from '../utils/astCreator' @@ -93,11 +92,11 @@ export class Stash extends Stack { * @param context The context to evaluate the program in. * @returns The result of running the ECE machine. */ -export function evaluate(program: es.Program, context: Context): Value { +export async function evaluate(program: es.Program, context: Context): Promise { try { context.runtime.isRunning = true - const nonImportNodes = evaluateImports(program, context, true, true) + const nonImportNodes = await evaluateImports(program, context, true, true) context.runtime.agenda = new Agenda({ ...program, @@ -132,7 +131,7 @@ export function resumeEvaluate(context: Context) { } } -function evaluateImports( +async function evaluateImports( program: es.Program, context: Context, loadTabs: boolean, @@ -143,43 +142,68 @@ function evaluateImports( ({ type }) => type === 'ImportDeclaration' ) as [es.ImportDeclaration[], es.Statement[]] - const moduleFunctions: Record = {} + if (importNodes.length === 0) return otherNodes + const environment = currentEnvironment(context) try { - for (const node of importNodes) { - const moduleName = node.source.value - if (typeof moduleName !== 'string') { - throw new Error(`ImportDeclarations should have string sources, got ${moduleName}`) - } - - if (!(moduleName in moduleFunctions)) { - context.moduleContexts[moduleName] = { - state: null, - tabs: loadTabs ? loadModuleTabs(moduleName, node) : null - } - moduleFunctions[moduleName] = loadModuleBundle(moduleName, context, node) - } - - const functions = moduleFunctions[moduleName] - const environment = currentEnvironment(context) - for (const spec of node.specifiers) { - if (spec.type !== 'ImportSpecifier') { - throw new Error(`Only ImportSpecifiers are supported, got: ${spec.type}`) - } - - if (checkImports && !(spec.imported.name in functions)) { - throw new UndefinedImportError(spec.imported.name, moduleName, node) + await reduceImportNodesAsync( + importNodes, + context, + loadTabs, + checkImports, + (name, node) => loadModuleBundleAsync(name, context, node), + (name, info) => (info.content ? new Set(Object.keys(info.content)) : null), + { + ImportSpecifier: (spec: es.ImportSpecifier, node, info) => { + declareIdentifier(context, spec.local.name, node, environment) + defineVariable(context, spec.local.name, info.content![spec.imported.name], true, node) + }, + ImportDefaultSpecifier: (spec, node, info) => { + declareIdentifier(context, spec.local.name, node, environment) + defineVariable(context, spec.local.name, info.content!['default'], true, node) + }, + ImportNamespaceSpecifier: (spec, node, info) => { + declareIdentifier(context, spec.local.name, node, environment) + defineVariable(context, spec.local.name, info.content!, true, node) } - - declareIdentifier(context, spec.local.name, node, environment) - defineVariable(context, spec.local.name, functions[spec.imported.name], true, node) } - } + ) } catch (error) { - // console.log(error) + // console.error(error) handleRuntimeError(context, error) } + // try { + // for (const node of importNodes) { + // const moduleName = node.source.value + // if (typeof moduleName !== 'string') { + // throw new Error(`ImportDeclarations should have string sources, got ${moduleName}`) + // } + + // if (!(moduleName in moduleFunctions)) { + // initModuleContext(moduleName, context, loadTabs, node) + // moduleFunctions[moduleName] = loadModuleBundle(moduleName, context, node) + // } + + // const functions = moduleFunctions[moduleName] + // for (const spec of node.specifiers) { + // if (spec.type !== 'ImportSpecifier') { + // throw new Error(`Only ImportSpecifiers are supported, got: ${spec.type}`) + // } + + // if (checkImports && !(spec.imported.name in functions)) { + // throw new UndefinedImportError(spec.imported.name, moduleName, node) + // } + + // declareIdentifier(context, spec.local.name, node, environment) + // defineVariable(context, spec.local.name, functions[spec.imported.name], true, node) + // } + // } + // } catch (error) { + // // console.log(error) + // handleRuntimeError(context, error) + // } + return otherNodes } diff --git a/src/infiniteLoops/__tests__/instrument.ts b/src/infiniteLoops/__tests__/instrument.ts index f4f69c924..f2c92a10a 100644 --- a/src/infiniteLoops/__tests__/instrument.ts +++ b/src/infiniteLoops/__tests__/instrument.ts @@ -37,7 +37,11 @@ function mockFunctionsAndState() { * Returns the value saved in the code using the builtin 'output'. * e.g. runWithMock('output(2)') --> 2 */ -function runWithMock(main: string, codeHistory?: string[], builtins: Map = new Map()) { +async function runWithMock( + main: string, + codeHistory?: string[], + builtins: Map = new Map() +) { let output = undefined builtins.set('output', (x: any) => (output = x)) builtins.set('undefined', undefined) @@ -53,7 +57,7 @@ function runWithMock(main: string, codeHistory?: string[], builtins: Map { const main = 'output(2);' - expect(runWithMock(main, [])).toBe(2) + expect(runWithMock(main, [])).resolves.toBe(2) }) test('binary and unary expressions work', () => { - expect(runWithMock('output(1+1);', [])).toBe(2) - expect(runWithMock('output(!true);', [])).toBe(false) + expect(runWithMock('output(1+1);', [])).resolves.toBe(2) + expect(runWithMock('output(!true);', [])).resolves.toBe(false) }) test('assignment works as expected', () => { @@ -75,13 +79,13 @@ test('assignment works as expected', () => { let a = []; a[0] = 3; output(x+a[0]);` - expect(runWithMock(main)).toBe(5) + expect(runWithMock(main)).resolves.toBe(5) }) test('globals from old code accessible', () => { const main = 'output(z+1);' const prev = ['const z = w+1;', 'let w = 10;'] - expect(runWithMock(main, prev)).toBe(12) + expect(runWithMock(main, prev)).resolves.toBe(12) }) test('functions run as expected', () => { @@ -89,7 +93,7 @@ test('functions run as expected', () => { return x===0?x:f(x-1,y)+y; } output(f(5,2));` - expect(runWithMock(main)).toBe(10) + expect(runWithMock(main)).resolves.toBe(10) }) test('nested functions run as expected', () => { @@ -100,7 +104,7 @@ test('nested functions run as expected', () => { return x===0?x:f(x-1,y)+y; } output(f(5,2));` - expect(runWithMock(main)).toBe(2) + expect(runWithMock(main)).resolves.toBe(2) }) test('higher order functions run as expected', () => { @@ -108,14 +112,14 @@ test('higher order functions run as expected', () => { return f(x+1); } output(run(x=>x+1, 1));` - expect(runWithMock(main)).toBe(3) + expect(runWithMock(main)).resolves.toBe(3) }) test('loops run as expected', () => { const main = `let w = 0; for (let i = w; i < 10; i=i+1) {w = i;} output(w);` - expect(runWithMock(main)).toBe(9) + expect(runWithMock(main)).resolves.toBe(9) }) test('nested loops run as expected', () => { @@ -126,13 +130,13 @@ test('nested loops run as expected', () => { } } output(w);` - expect(runWithMock(main)).toBe(100) + expect(runWithMock(main)).resolves.toBe(100) }) test('multidimentional arrays work', () => { const main = `const x = [[1],[2]]; output(x[1] === undefined? undefined: x[1][0]);` - expect(runWithMock(main)).toBe(2) + expect(runWithMock(main)).resolves.toBe(2) }) test('if statements work as expected', () => { @@ -141,7 +145,7 @@ test('if statements work as expected', () => { x = x + 1; } else {} output(x);` - expect(runWithMock(main)).toBe(2) + expect(runWithMock(main)).resolves.toBe(2) }) test('combination of loops and functions run as expected', () => { @@ -158,5 +162,5 @@ test('combination of loops and functions run as expected', () => { w = minus(w,1); } output(z);` - expect(runWithMock(main)).toBe(100) + expect(runWithMock(main)).resolves.toBe(100) }) diff --git a/src/infiniteLoops/__tests__/runtime.ts b/src/infiniteLoops/__tests__/runtime.ts index 4eb48dae8..c618d08d8 100644 --- a/src/infiniteLoops/__tests__/runtime.ts +++ b/src/infiniteLoops/__tests__/runtime.ts @@ -3,15 +3,20 @@ import * as es from 'estree' import { runInContext } from '../..' import createContext from '../../createContext' import { mockContext } from '../../mocks/context' -import * as moduleLoader from '../../modules/moduleLoader' +import * as moduleLoader from '../../modules/moduleLoaderAsync' import { parse } from '../../parser/parser' import { Chapter, Variant } from '../../types' import { stripIndent } from '../../utils/formatters' import { getInfiniteLoopData, InfiniteLoopError, InfiniteLoopErrorType } from '../errors' import { testForInfiniteLoop } from '../runtime' -jest.spyOn(moduleLoader, 'memoizedGetModuleFile').mockImplementationOnce(() => { - return stripIndent` +jest.mock('lodash', () => ({ + ...jest.requireActual('lodash'), + memoize: jest.fn(f => f) +})) + +jest.spyOn(moduleLoader, 'memoizedGetModuleBundleAsync').mockImplementation(() => { + return Promise.resolve(stripIndent` require => { 'use strict'; var exports = {}; @@ -36,7 +41,10 @@ jest.spyOn(moduleLoader, 'memoizedGetModuleFile').mockImplementationOnce(() => { }); return exports; } - ` + `) +}) +jest.spyOn(moduleLoader, 'memoizedGetModuleManifestAsync').mockResolvedValue({ + repeat: { tabs: [] } }) test('works in runInContext when throwInfiniteLoops is true', async () => { @@ -77,84 +85,84 @@ const testForInfiniteLoopWithCode = (code: string, previousPrograms: es.Program[ return testForInfiniteLoop(program, previousPrograms) } -test('non-infinite recursion not detected', () => { +test('non-infinite recursion not detected', async () => { const code = `function fib(x) { return x<=1?x:fib(x-1) + fib(x-2); } fib(100000); ` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result).toBeUndefined() }) -test('non-infinite loop not detected', () => { +test('non-infinite loop not detected', async () => { const code = `for(let i = 0;i<2000;i=i+1){i+1;} let j = 0; while(j<2000) {j=j+1;} ` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result).toBeUndefined() }) -test('no base case function detected', () => { +test('no base case function detected', async () => { const code = `function fib(x) { return fib(x-1) + fib(x-2); } fib(100000); ` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result?.infiniteLoopType).toBe(InfiniteLoopErrorType.NoBaseCase) expect(result?.streamMode).toBe(false) }) -test('no base case loop detected', () => { +test('no base case loop detected', async () => { const code = `for(let i = 0;true;i=i+1){i+1;} ` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result?.infiniteLoopType).toBe(InfiniteLoopErrorType.NoBaseCase) expect(result?.streamMode).toBe(false) }) -test('no variables changing function detected', () => { +test('no variables changing function detected', async () => { const code = `let x = 1; function f() { return x===0?x:f(); } f(); ` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result?.infiniteLoopType).toBe(InfiniteLoopErrorType.Cycle) expect(result?.streamMode).toBe(false) expect(result?.explain()).toContain('None of the variables are being updated.') }) -test('no state change function detected', () => { +test('no state change function detected', async () => { const code = `let x = 1; function f() { return x===0?x:f(); } f(); ` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result?.infiniteLoopType).toBe(InfiniteLoopErrorType.Cycle) expect(result?.streamMode).toBe(false) expect(result?.explain()).toContain('None of the variables are being updated.') }) -test('infinite cycle detected', () => { +test('infinite cycle detected', async () => { const code = `function f(x) { return x[0] === 1? x : f(x); } f([2,3,4]); ` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result?.infiniteLoopType).toBe(InfiniteLoopErrorType.Cycle) expect(result?.streamMode).toBe(false) expect(result?.explain()).toContain('cycle') expect(result?.explain()).toContain('[2,3,4]') }) -test('infinite data structures detected', () => { +test('infinite data structures detected', async () => { const code = `function f(x) { return is_null(x)? x : f(tail(x)); } @@ -162,32 +170,32 @@ test('infinite data structures detected', () => { set_tail(tail(tail(circ)), circ); f(circ); ` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result?.infiniteLoopType).toBe(InfiniteLoopErrorType.Cycle) expect(result?.streamMode).toBe(false) expect(result?.explain()).toContain('cycle') expect(result?.explain()).toContain('(CIRCULAR)') }) -test('functions using SMT work', () => { +test('functions using SMT work', async () => { const code = `function f(x) { return x===0? x: f(x+1); } f(1); ` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result?.infiniteLoopType).toBe(InfiniteLoopErrorType.FromSmt) expect(result?.streamMode).toBe(false) }) -test('detect forcing infinite streams', () => { +test('detect forcing infinite streams', async () => { const code = `stream_to_list(integers_from(0));` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result?.infiniteLoopType).toBe(InfiniteLoopErrorType.NoBaseCase) expect(result?.streamMode).toBe(true) }) -test('detect mutual recursion', () => { +test('detect mutual recursion', async () => { const code = `function e(x){ return x===0?1:1-o(x-1); } @@ -195,23 +203,23 @@ test('detect mutual recursion', () => { return x===1?0:1-e(x-1); } e(9);` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result?.infiniteLoopType).toBe(InfiniteLoopErrorType.FromSmt) expect(result?.streamMode).toBe(false) }) -test('functions passed as arguments not checked', () => { +test('functions passed as arguments not checked', async () => { // if they are checked -> this will throw no base case const code = `const twice = f => x => f(f(x)); const thrice = f => x => f(f(f(x))); const add = x => x + 1; (thrice)(twice(twice))(twice(add))(0);` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result).toBeUndefined() }) -test('detect complicated cycle example', () => { +test('detect complicated cycle example', async () => { const code = `function permutations(s) { return is_null(s) ? list(null) @@ -230,12 +238,12 @@ test('detect complicated cycle example', () => { remove_duplicate(list(list(1,2,3), list(1,2,3))); ` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result?.infiniteLoopType).toBe(InfiniteLoopErrorType.Cycle) expect(result?.streamMode).toBe(false) }) -test('detect complicated cycle example 2', () => { +test('detect complicated cycle example 2', async () => { const code = `function make_big_int_from_number(num){ let output = num; while(output !== 0){ @@ -246,12 +254,12 @@ test('detect complicated cycle example 2', () => { } make_big_int_from_number(1234); ` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result?.infiniteLoopType).toBe(InfiniteLoopErrorType.Cycle) expect(result?.streamMode).toBe(false) }) -test('detect complicated fromSMT example 2', () => { +test('detect complicated fromSMT example 2', async () => { const code = `function fast_power(b,n){ if (n % 2 === 0){ return b* fast_power(b, n-2); @@ -261,47 +269,47 @@ test('detect complicated fromSMT example 2', () => { } fast_power(2,3);` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result?.infiniteLoopType).toBe(InfiniteLoopErrorType.FromSmt) expect(result?.streamMode).toBe(false) }) -test('detect complicated stream example', () => { +test('detect complicated stream example', async () => { const code = `function up(a, b) { return (a > b) ? up(1, 1 + b) : pair(a, () => stream_reverse(up(a + 1, b))); } eval_stream(up(1,1), 22);` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result).toBeDefined() expect(result?.streamMode).toBe(true) }) -test('math functions are disabled in smt solver', () => { +test('math functions are disabled in smt solver', async () => { const code = ` function f(x) { return x===0? x: f(math_floor(x+1)); } f(1);` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result).toBeUndefined() }) -test('cycle detection ignores non deterministic functions', () => { +test('cycle detection ignores non deterministic functions', async () => { const code = ` function f(x) { return x===0?0:f(math_floor(math_random()/2) + 1); } f(1);` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result).toBeUndefined() }) -test('handle imports properly', () => { +test('handle imports properly', async () => { const code = `import {thrice} from "repeat"; function f(x) { return is_number(x) ? f(x) : 42; } display(f(thrice(x=>x+1)(0)));` - const result = testForInfiniteLoopWithCode(code, []) + const result = await testForInfiniteLoopWithCode(code, []) expect(result?.infiniteLoopType).toBe(InfiniteLoopErrorType.Cycle) }) diff --git a/src/infiniteLoops/instrument.ts b/src/infiniteLoops/instrument.ts index c8c98d0e8..8091f93af 100644 --- a/src/infiniteLoops/instrument.ts +++ b/src/infiniteLoops/instrument.ts @@ -574,15 +574,28 @@ function trackLocations(program: es.Program) { }) } -function handleImports(programs: es.Program[]): [string, string[]] { - const [prefixes, imports] = programs.reduce( - ([prefix, moduleNames], program) => { - const [prefixToAdd, importsToAdd, otherNodes] = transformImportDeclarations( +async function handleImports(programs: es.Program[]): Promise<[string, string[]]> { + const results = await Promise.all( + programs.map(async program => { + const [prefix, declNodes, otherNodes] = await transformImportDeclarations( program, - new Set(), + null, + new Set(), + false, + false, + undefined, // create.identifier(NATIVE_STORAGE_ID), false ) - program.body = (importsToAdd as es.Program['body']).concat(otherNodes) + + program.body = (declNodes as es.Program['body']).concat(otherNodes) + return [prefix, declNodes, otherNodes] as Awaited< + ReturnType + > + }) + ) + + const [prefixes, imports] = results.reduce( + ([prefix, moduleNames], [prefixToAdd, importsToAdd]) => { prefix.push(prefixToAdd) const importedNames = importsToAdd.flatMap(node => @@ -606,11 +619,11 @@ function handleImports(programs: es.Program[]): [string, string[]] { * @param builtins Names of builtin functions. * @returns code with instrumentations. */ -function instrument( +async function instrument( previous: es.Program[], program: es.Program, builtins: Iterable -): string { +): Promise { const { builtinsId, functionsId, stateId } = globalIds const predefined = {} predefined[builtinsId] = builtinsId @@ -618,7 +631,7 @@ function instrument( predefined[stateId] = stateId const innerProgram = { ...program } - const [prefix, moduleNames] = handleImports([program].concat(previous)) + const [prefix, moduleNames] = await handleImports([program].concat(previous)) for (const name of moduleNames) { predefined[name] = name } diff --git a/src/infiniteLoops/runtime.ts b/src/infiniteLoops/runtime.ts index a9b81b95f..83783e251 100644 --- a/src/infiniteLoops/runtime.ts +++ b/src/infiniteLoops/runtime.ts @@ -305,7 +305,10 @@ functions[FunctionNames.evalU] = sym.evaluateHybridUnary * @param previousProgramsStack Any code previously entered in the REPL & parsed into AST. * @returns SourceError if an infinite loop was detected, undefined otherwise. */ -export function testForInfiniteLoop(program: es.Program, previousProgramsStack: es.Program[]) { +export async function testForInfiniteLoop( + program: es.Program, + previousProgramsStack: es.Program[] +) { const context = createContext(Chapter.SOURCE_4, Variant.DEFAULT, undefined, undefined) const prelude = parse(context.prelude as string, context) as es.Program context.prelude = null @@ -313,7 +316,7 @@ export function testForInfiniteLoop(program: es.Program, previousProgramsStack: const newBuiltins = prepareBuiltins(context.nativeStorage.builtins) const { builtinsId, functionsId, stateId } = InfiniteLoopRuntimeObjectNames - const instrumentedCode = instrument(previous, program, newBuiltins.keys()) + const instrumentedCode = await instrument(previous, program, newBuiltins.keys()) const state = new st.State() const sandboxedRun = new Function( @@ -327,7 +330,7 @@ export function testForInfiniteLoop(program: es.Program, previousProgramsStack: ) try { - sandboxedRun(instrumentedCode, functions, state, newBuiltins, getRequireProvider(context)) + await sandboxedRun(instrumentedCode, functions, state, newBuiltins, getRequireProvider(context)) } catch (error) { if (error instanceof InfiniteLoopError) { if (state.lastLocation !== undefined) { diff --git a/src/interpreter/interpreter.ts b/src/interpreter/interpreter.ts index afb66958e..468cf86cb 100644 --- a/src/interpreter/interpreter.ts +++ b/src/interpreter/interpreter.ts @@ -6,9 +6,14 @@ import { UNKNOWN_LOCATION } from '../constants' import { LazyBuiltIn } from '../createContext' import * as errors from '../errors/errors' import { RuntimeSourceError } from '../errors/runtimeSourceError' -import { UndefinedImportError } from '../modules/errors' -import { loadModuleBundle, loadModuleTabs } from '../modules/moduleLoader' +import { + UndefinedDefaultImportError, + UndefinedImportError, + UndefinedNamespaceImportError +} from '../modules/errors' +import { loadModuleBundle } from '../modules/moduleLoader' import { ModuleFunctions } from '../modules/moduleTypes' +import { initModuleContext } from '../modules/utils' import { checkEditorBreakpoints } from '../stdlib/inspector' import { Context, ContiguousArrayElements, Environment, Frame, Value, Variant } from '../types' import * as create from '../utils/astCreator' @@ -739,26 +744,41 @@ export function* evaluateProgram( } if (!(moduleName in moduleFunctions)) { - context.moduleContexts[moduleName] = { - state: null, - tabs: loadTabs ? loadModuleTabs(moduleName, node) : null - } + initModuleContext(moduleName, context, loadTabs, node) moduleFunctions[moduleName] = loadModuleBundle(moduleName, context, node) } const functions = moduleFunctions[moduleName] + const funcCount = Object.keys(functions).length for (const spec of node.specifiers) { - if (spec.type !== 'ImportSpecifier') { - throw new Error(`Only Import Specifiers are supported, got ${spec.type}`) - } + declareIdentifier(context, spec.local.name, node) + switch (spec.type) { + case 'ImportSpecifier': { + if (checkImports && !(spec.imported.name in functions)) { + throw new UndefinedImportError(spec.imported.name, moduleName, node) + } + + defineVariable(context, spec.local.name, functions[spec.imported.name], true) + break + } + case 'ImportDefaultSpecifier': { + if (checkImports && !('default' in functions)) { + throw new UndefinedDefaultImportError(moduleName, node) + } - if (checkImports && !(spec.imported.name in functions)) { - throw new UndefinedImportError(spec.imported.name, moduleName, node) - } + defineVariable(context, spec.local.name, functions['default'], true) + break + } + case 'ImportNamespaceSpecifier': { + if (checkImports && funcCount === 0) { + throw new UndefinedNamespaceImportError(moduleName, node) + } - declareIdentifier(context, spec.local.name, node) - defineVariable(context, spec.local.name, functions[spec.imported.name], true) + defineVariable(context, spec.local.name, functions, true) + break + } + } } yield* leave(context) } diff --git a/src/modules/errors.ts b/src/modules/errors.ts index fa3ebaef0..6c643d58b 100644 --- a/src/modules/errors.ts +++ b/src/modules/errors.ts @@ -19,3 +19,30 @@ export class UndefinedImportError extends RuntimeSourceError { return "Check your imports and make sure what you're trying to import exists!" } } + +export class UndefinedDefaultImportError extends RuntimeSourceError { + constructor(public readonly moduleName: string, node?: ImportDeclaration) { + super(node) + } + + public explain(): string { + return `'${this.moduleName}' does not contain a default export!` + } + + public elaborate(): string { + return "Check your imports and make sure what you're trying to import exists!" + } +} +export class UndefinedNamespaceImportError extends RuntimeSourceError { + constructor(public readonly moduleName: string, node?: ImportDeclaration) { + super(node) + } + + public explain(): string { + return `'${this.moduleName}' does not export any symbols!` + } + + public elaborate(): string { + return "Check your imports and make sure what you're trying to import exists!" + } +} diff --git a/src/modules/moduleLoader.ts b/src/modules/moduleLoader.ts index 2801ce81a..2e05e67ce 100644 --- a/src/modules/moduleLoader.ts +++ b/src/modules/moduleLoader.ts @@ -9,7 +9,7 @@ import { } from '../errors/moduleErrors' import { Context } from '../types' import { wrapSourceModule } from '../utils/operators' -import { ModuleBundle, ModuleDocumentation, ModuleFunctions, Modules } from './moduleTypes' +import { ModuleBundle, ModuleDocumentation, ModuleFunctions, ModuleManifest } from './moduleTypes' import { getRequireProvider } from './requireProvider' // Supports both JSDom (Web Browser) environment and Node environment @@ -46,7 +46,7 @@ export function httpGet(url: string): string { * @return Modules */ export const memoizedGetModuleManifest = memoize(getModuleManifest) -function getModuleManifest(): Modules { +function getModuleManifest(): ModuleManifest { const rawManifest = httpGet(`${MODULES_STATIC_URL}/modules.json`) return JSON.parse(rawManifest) } diff --git a/src/modules/moduleLoaderAsync.ts b/src/modules/moduleLoaderAsync.ts new file mode 100644 index 000000000..253937cd0 --- /dev/null +++ b/src/modules/moduleLoaderAsync.ts @@ -0,0 +1,92 @@ +import { Node } from 'estree' +import { memoize } from 'lodash' + +import type { Context } from '..' +import { ModuleInternalError, ModuleNotFoundError } from '../errors/moduleErrors' +import { wrapSourceModule } from '../utils/operators' +import { httpGet, MODULES_STATIC_URL } from './moduleLoader' +import type { ModuleBundle, ModuleDocumentation, ModuleManifest } from './moduleTypes' +import { getRequireProvider } from './requireProvider' + +async function httpGetAsync(path: string) { + return new Promise((resolve, reject) => { + try { + resolve(httpGet(path)) + } catch (error) { + reject(error) + } + }) +} + +/** + * Send a HTTP GET request to the modules endpoint to retrieve the manifest + * @return Modules + */ +export const memoizedGetModuleManifestAsync = memoize(getModuleManifestAsync) +async function getModuleManifestAsync(): Promise { + const rawManifest = await httpGetAsync(`${MODULES_STATIC_URL}/modules.json`) + return JSON.parse(rawManifest) +} + +async function checkModuleExists(moduleName: string, node?: Node) { + const modules = await memoizedGetModuleManifestAsync() + // Check if the module exists + if (!(moduleName in modules)) throw new ModuleNotFoundError(moduleName, node) + + return modules[moduleName] +} + +export const memoizedGetModuleBundleAsync = memoize(getModuleBundleAsync) +async function getModuleBundleAsync(moduleName: string, node?: Node): Promise { + await checkModuleExists(moduleName, node) + return httpGetAsync(`${MODULES_STATIC_URL}/bundles/${moduleName}.js`) +} + +export const memoizedGetModuleTabAsync = memoize(getModuleTabAsync) +function getModuleTabAsync(tabName: string): Promise { + return httpGetAsync(`${MODULES_STATIC_URL}/tabs/${tabName}.js`) +} + +export const memoizedGetModuleDocsAsync = memoize(getModuleDocsAsync) +async function getModuleDocsAsync( + moduleName: string, + node?: Node +): Promise { + try { + await checkModuleExists(moduleName, node) + const rawDocs = await httpGetAsync(`${MODULES_STATIC_URL}/jsons/${moduleName}.json`) + return JSON.parse(rawDocs) + } catch (error) { + console.warn(`Failed to load documentation for ${moduleName}`) + return null + } +} + +export async function loadModuleTabsAsync(moduleName: string, node?: Node) { + const moduleInfo = await checkModuleExists(moduleName, node) + + // Load the tabs for the current module + return Promise.all( + moduleInfo.tabs.map(async path => { + const rawTabFile = await memoizedGetModuleTabAsync(path) + try { + return eval(rawTabFile) + } catch (error) { + // console.error('tab error:', error); + throw new ModuleInternalError(path, error, node) + } + }) + ) +} + +export async function loadModuleBundleAsync(moduleName: string, context: Context, node?: Node) { + await checkModuleExists(moduleName, node) + const moduleText = await memoizedGetModuleBundleAsync(moduleName) + try { + const moduleBundle: ModuleBundle = eval(moduleText) + return wrapSourceModule(moduleName, moduleBundle, getRequireProvider(context)) + } catch (error) { + // console.error("bundle error: ", error) + throw new ModuleInternalError(moduleName, error, node) + } +} diff --git a/src/modules/moduleTypes.ts b/src/modules/moduleTypes.ts index 974f27de4..f258dff49 100644 --- a/src/modules/moduleTypes.ts +++ b/src/modules/moduleTypes.ts @@ -1,6 +1,6 @@ import type { RequireProvider } from './requireProvider' -export type Modules = { +export type ModuleManifest = { [module: string]: { tabs: string[] } diff --git a/src/modules/utils.ts b/src/modules/utils.ts new file mode 100644 index 000000000..0f3f3b07b --- /dev/null +++ b/src/modules/utils.ts @@ -0,0 +1,170 @@ +import { ImportDeclaration, Node } from 'estree' + +import { Context } from '..' +import { getUniqueId } from '../utils/uniqueIds' +import { + UndefinedDefaultImportError, + UndefinedImportError, + UndefinedNamespaceImportError +} from './errors' +import { loadModuleTabs } from './moduleLoader' +import { loadModuleTabsAsync } from './moduleLoaderAsync' + +export async function initModuleContext( + moduleName: string, + context: Context, + loadTabs: boolean, + node?: Node +) { + if (!(moduleName in context)) { + context.moduleContexts[moduleName] = { + state: null, + tabs: loadTabs ? loadModuleTabs(moduleName, node) : null + } + } else if (context.moduleContexts[moduleName].tabs === null && loadTabs) { + context.moduleContexts[moduleName].tabs = loadModuleTabs(moduleName, node) + } +} + +export async function initModuleContextAsync( + moduleName: string, + context: Context, + loadTabs: boolean, + node?: Node +) { + if (!(moduleName in context)) { + context.moduleContexts[moduleName] = { + state: null, + tabs: loadTabs ? await loadModuleTabsAsync(moduleName, node) : null + } + } else if (context.moduleContexts[moduleName].tabs === null && loadTabs) { + context.moduleContexts[moduleName].tabs = await loadModuleTabsAsync(moduleName, node) + } +} + +export type ModuleInfo = { + docs: Set | null + nodes: ImportDeclaration[] + content: T | null + namespaced: string | null +} + +export type SpecifierProcessor = ( + spec: ImportDeclaration['specifiers'][0], + node: ImportDeclaration, + moduleInfo: ModuleInfo +) => Transformed + +type SymbolLoader = ( + name: string, + info: ModuleInfo, + node?: Node +) => Promise | null> | Set | null + +export type ImportSpecifierType = + | 'ImportSpecifier' + | 'ImportDefaultSpecifier' + | 'ImportNamespaceSpecifier' + +export async function reduceImportNodesAsync( + nodes: ImportDeclaration[], + context: Context | null, + loadTabs: boolean, + checkImports: boolean, + moduleLoader: (name: string, node?: Node) => Promise, + symbolsLoader: SymbolLoader, + processors: Record>, + usedIdentifiers?: Set +) { + const internalLoader = async (name: string, node?: Node) => { + // Make sure that module contexts are initialized before + // loading the bundles + if (context) { + await initModuleContextAsync(name, context, loadTabs, node) + } + + return moduleLoader(name, node) + } + + const promises: Promise[] = [] + const moduleInfos = nodes.reduce((res, node) => { + const moduleName = node.source.value + if (typeof moduleName !== 'string') { + throw new Error( + `Expected ImportDeclaration to have a source of type string, got ${moduleName}` + ) + } + + if (!(moduleName in res)) { + promises.push( + internalLoader(moduleName, node).then(content => { + res[moduleName].content = content + }) + ) + + if (checkImports) { + const docsResult = symbolsLoader(moduleName, res[moduleName], node) + if (docsResult instanceof Promise) { + promises.push( + docsResult.then(docs => { + res[moduleName].docs = docs + }) + ) + } else { + res[moduleName].docs = docsResult + } + } + res[moduleName] = { + docs: null, + nodes: [], + content: null, + namespaced: null + } + } + + res[moduleName].nodes.push(node) + node.specifiers.forEach(spec => usedIdentifiers?.add(spec.local.name)) + return res + }, {} as Record>) + + await Promise.all(promises) + + return Object.entries(moduleInfos).reduce((res, [moduleName, info]) => { + const namespaced = usedIdentifiers ? getUniqueId(usedIdentifiers, '__MODULE__') : null + info.namespaced = namespaced + + if (checkImports && info.docs === null) { + console.warn(`Failed to load documentation for ${moduleName}, skipping typechecking`) + } + return { + ...res, + [moduleName]: { + content: info.nodes.flatMap(node => + node.specifiers.flatMap(spec => { + if (checkImports && info.docs) { + switch (spec.type) { + case 'ImportSpecifier': { + if (!info.docs.has(spec.imported.name)) + throw new UndefinedImportError(spec.imported.name, moduleName, node) + break + } + case 'ImportDefaultSpecifier': { + if (!info.docs.has('default')) + throw new UndefinedDefaultImportError(moduleName, node) + break + } + case 'ImportNamespaceSpecifier': { + if (info.docs.size === 0) + throw new UndefinedNamespaceImportError(moduleName, node) + break + } + } + } + return processors[spec.type](spec, node, info) + }) + ), + info + } + } + }, {} as Record; content: Transformed[] }>) +} diff --git a/src/repl/transpiler.ts b/src/repl/transpiler.ts index db7d3906b..bd441a00e 100644 --- a/src/repl/transpiler.ts +++ b/src/repl/transpiler.ts @@ -11,7 +11,7 @@ import { transpile } from '../transpiler/transpiler' import { Chapter, Variant } from '../types' import { validateAndAnnotate } from '../validator/validator' -function transpileCode( +async function transpileCode( chapter: Chapter = Chapter.SOURCE_1, variant: Variant = Variant.DEFAULT, code = '', @@ -35,7 +35,7 @@ function transpileCode( if (pretranspile) { return generate(program) } else { - return transpile(program as Program, context).transpiled + return (await transpile(program as Program, context)).transpiled } } @@ -90,8 +90,8 @@ function main() { }) process.stdin.on('end', () => { const code = Buffer.concat(chunks).toString('utf-8') - const transpiled = transpileCode(chapter, variant, code, pretranspile) - process.stdout.write(transpiled) + transpileCode(chapter, variant, code, pretranspile).then(data => process.stdout.write(data)) + // process.stdout.write(transpiled) }) } diff --git a/src/runner/fullJSRunner.ts b/src/runner/fullJSRunner.ts index 4924d6de5..8a34daeb6 100644 --- a/src/runner/fullJSRunner.ts +++ b/src/runner/fullJSRunner.ts @@ -13,7 +13,7 @@ import { evallerReplacer, getBuiltins, transpile } from '../transpiler/transpile import type { Context, NativeStorage } from '../types' import * as create from '../utils/astCreator' import { toSourceError } from './errors' -import { appendModulesToContext, resolvedErrorPromise } from './utils' +import { resolvedErrorPromise } from './utils' function fullJSEval( code: string, @@ -62,7 +62,6 @@ export async function fullJSRunner( // modules hoistAndMergeImports(program) - appendModulesToContext(program, context) // evaluate and create a separate block for preludes and builtins const preEvalProgram: es.Program = create.program([ @@ -76,13 +75,14 @@ export async function fullJSRunner( let transpiled let sourceMapJson: RawSourceMap | undefined try { - ;({ transpiled, sourceMapJson } = transpile(program, context)) - return Promise.resolve({ + ;({ transpiled, sourceMapJson } = await transpile(program, context)) + return { status: 'finished', context, value: await fullJSEval(transpiled, requireProvider, context.nativeStorage) - }) + } } catch (error) { + // console.log(error) context.errors.push( error instanceof RuntimeSourceError ? error : await toSourceError(error, sourceMapJson) ) diff --git a/src/runner/sourceRunner.ts b/src/runner/sourceRunner.ts index 935dd8c7a..3411e50af 100644 --- a/src/runner/sourceRunner.ts +++ b/src/runner/sourceRunner.ts @@ -36,7 +36,7 @@ import { runWithProgram } from '../vm/svml-machine' import { determineExecutionMethod, hasVerboseErrors } from '.' import { toSourceError } from './errors' import { fullJSRunner } from './fullJSRunner' -import { appendModulesToContext, determineVariant, resolvedErrorPromise } from './utils' +import { determineVariant, resolvedErrorPromise } from './utils' const DEFAULT_SOURCE_OPTIONS: IOptions = { scheduler: 'async', @@ -138,8 +138,6 @@ async function runNative( let transpiled let sourceMapJson: RawSourceMap | undefined try { - appendModulesToContext(transpiledProgram, context) - switch (context.variant) { case Variant.GPU: transpileToGPU(transpiledProgram) @@ -149,7 +147,7 @@ async function runNative( break } - ;({ transpiled, sourceMapJson } = transpile(transpiledProgram, context)) + ;({ transpiled, sourceMapJson } = await transpile(transpiledProgram, context)) let value = await sandboxedEval(transpiled, getRequireProvider(context), context.nativeStorage) if (context.variant === Variant.LAZY) { @@ -160,16 +158,19 @@ async function runNative( isPreviousCodeTimeoutError = false } - return Promise.resolve({ + return { status: 'finished', context, value - }) + } } catch (error) { // console.error(error) const isDefaultVariant = options.variant === undefined || options.variant === Variant.DEFAULT if (isDefaultVariant && isPotentialInfiniteLoop(error)) { - const detectedInfiniteLoop = testForInfiniteLoop(program, context.previousPrograms.slice(1)) + const detectedInfiniteLoop = await testForInfiniteLoop( + program, + context.previousPrograms.slice(1) + ) if (detectedInfiniteLoop !== undefined) { if (options.throwInfiniteLoops) { context.errors.push(detectedInfiniteLoop) @@ -205,8 +206,12 @@ async function runNative( } } -function runECEvaluator(program: es.Program, context: Context, options: IOptions): Promise { - const value = ECEvaluate(program, context) +async function runECEvaluator( + program: es.Program, + context: Context, + options: IOptions +): Promise { + const value = await ECEvaluate(program, context) return ECEResultPromise(context, value) } diff --git a/src/runner/utils.ts b/src/runner/utils.ts index 43b864409..9bb32125b 100644 --- a/src/runner/utils.ts +++ b/src/runner/utils.ts @@ -2,7 +2,6 @@ import { DebuggerStatement, Literal, Program } from 'estree' import { IOptions, Result } from '..' -import { loadModuleTabs } from '../modules/moduleLoader' import { parseAt } from '../parser/utils' import { areBreakpointsSet } from '../stdlib/inspector' import { Context, Variant } from '../types' @@ -82,29 +81,6 @@ export function determineExecutionMethod( context.executionMethod = isNativeRunnable ? 'native' : 'ec-evaluator' } -/** - * Add UI tabs needed for modules to program context - * - * @param program AST of program to be ran - * @param context The context of the program - */ -export function appendModulesToContext(program: Program, context: Context): void { - for (const node of program.body) { - if (node.type !== 'ImportDeclaration') break - const moduleName = (node.source.value as string).trim() - - // Load the module's tabs - if (!(moduleName in context.moduleContexts)) { - context.moduleContexts[moduleName] = { - state: null, - tabs: loadModuleTabs(moduleName) - } - } else if (context.moduleContexts[moduleName].tabs === null) { - context.moduleContexts[moduleName].tabs = loadModuleTabs(moduleName) - } - } -} - // AST Utils export function hasVerboseErrors(theCode: string): boolean { diff --git a/src/stdlib/list.ts b/src/stdlib/list.ts index af91e2f3b..f646056a8 100644 --- a/src/stdlib/list.ts +++ b/src/stdlib/list.ts @@ -27,15 +27,15 @@ export function pair(x: H, xs: T): Pair { // is_pair returns true iff arg is a two-element array // LOW-LEVEL FUNCTION, NOT SOURCE -export function is_pair(x: any) { +export function is_pair(x: any): x is Pair { return array_test(x) && x.length === 2 } // head returns the first component of the given pair, // throws an exception if the argument is not a pair // LOW-LEVEL FUNCTION, NOT SOURCE -export function head(xs: any) { - if (is_pair(xs)) { +export function head(xs: any): H { + if (is_pair(xs)) { return xs[0] } else { throw new Error('head(xs) expects a pair as argument xs, but encountered ' + stringify(xs)) @@ -45,8 +45,8 @@ export function head(xs: any) { // tail returns the second component of the given pair // throws an exception if the argument is not a pair // LOW-LEVEL FUNCTION, NOT SOURCE -export function tail(xs: any) { - if (is_pair(xs)) { +export function tail(xs: any): T { + if (is_pair(xs)) { return xs[1] } else { throw new Error('tail(xs) expects a pair as argument xs, but encountered ' + stringify(xs)) @@ -55,7 +55,7 @@ export function tail(xs: any) { // is_null returns true if arg is exactly null // LOW-LEVEL FUNCTION, NOT SOURCE -export function is_null(xs: List) { +export function is_null(xs: List): xs is null { return xs === null } @@ -71,7 +71,7 @@ export function list(...elements: any[]): List { // recurses down the list and checks that it ends with the empty list null // LOW-LEVEL FUNCTION, NOT SOURCE -export function is_list(xs: List) { +export function is_list(xs: any): xs is List { while (is_pair(xs)) { xs = tail(xs) } diff --git a/src/stdlib/misc.ts b/src/stdlib/misc.ts index bff859425..ba92ca8a1 100644 --- a/src/stdlib/misc.ts +++ b/src/stdlib/misc.ts @@ -36,19 +36,19 @@ export function timed( } } -export function is_number(v: Value) { +export function is_number(v: Value): v is number { return typeof v === 'number' } -export function is_undefined(xs: Value) { +export function is_undefined(xs: Value): xs is undefined { return typeof xs === 'undefined' } -export function is_string(xs: Value) { +export function is_string(xs: Value): xs is string { return typeof xs === 'string' } -export function is_boolean(xs: Value) { +export function is_boolean(xs: Value): xs is boolean { return typeof xs === 'boolean' } diff --git a/src/transpiler/__tests__/modules.ts b/src/transpiler/__tests__/modules.ts index c7b8c1ae2..9996498dd 100644 --- a/src/transpiler/__tests__/modules.ts +++ b/src/transpiler/__tests__/modules.ts @@ -1,43 +1,36 @@ import type { Identifier, Literal, MemberExpression, VariableDeclaration } from 'estree' -import type { FunctionLike, MockedFunction } from 'jest-mock' +import { runInContext } from '../..' import { mockContext } from '../../mocks/context' import { UndefinedImportError } from '../../modules/errors' -import { memoizedGetModuleFile } from '../../modules/moduleLoader' +import * as moduleLoader from '../../modules/moduleLoaderAsync' import { parse } from '../../parser/parser' -import { Chapter } from '../../types' +import { Chapter, Value } from '../../types' import { stripIndent } from '../../utils/formatters' import { transformImportDeclarations, transpile } from '../transpiler' -jest.mock('../../modules/moduleLoader', () => ({ - ...jest.requireActual('../../modules/moduleLoader'), - memoizedGetModuleFile: jest.fn(), - memoizedGetModuleManifest: jest.fn().mockReturnValue({ - one_module: { - tabs: [] - }, - another_module: { - tabs: [] - } - }), - memoizedloadModuleDocs: jest.fn().mockReturnValue({ - foo: 'foo', - bar: 'bar' - }) +jest.mock('lodash', () => ({ + ...jest.requireActual('lodash'), + memoize: jest.fn(f => f) })) -const asMock = (func: T) => func as MockedFunction -const mockedModuleFile = asMock(memoizedGetModuleFile) - -test('Transform import declarations into variable declarations', () => { - mockedModuleFile.mockImplementation((name, type) => { - if (type === 'json') { - return name === 'one_module' ? "{ foo: 'foo' }" : "{ bar: 'bar' }" - } else { - return 'undefined' - } +jest.spyOn(moduleLoader, 'memoizedGetModuleManifestAsync').mockResolvedValue({ + one_module: { tabs: [] }, + another_module: { tabs: [] } +}) +jest.spyOn(moduleLoader, 'memoizedGetModuleBundleAsync').mockResolvedValue(` + require => ({ + foo: () => 'foo', + bar: () => 'bar' }) +`) +jest + .spyOn(moduleLoader, 'memoizedGetModuleDocsAsync') + .mockImplementation(name => + Promise.resolve>(name === 'one_module' ? { foo: 'foo' } : { bar: 'bar' }) + ) +test('Transform import declarations into variable declarations', async () => { const code = stripIndent` import { foo } from "test/one_module"; import { bar } from "test/another_module"; @@ -45,7 +38,13 @@ test('Transform import declarations into variable declarations', () => { ` const context = mockContext(Chapter.SOURCE_4) const program = parse(code, context)! - const [, importNodes] = transformImportDeclarations(program, new Set(), false) + const [, importNodes] = await transformImportDeclarations( + program, + context, + new Set(), + false, + false + ) expect(importNodes[0].type).toBe('VariableDeclaration') expect((importNodes[0].declarations[0].id as Identifier).name).toEqual('foo') @@ -54,27 +53,21 @@ test('Transform import declarations into variable declarations', () => { expect((importNodes[1].declarations[0].id as Identifier).name).toEqual('bar') }) -test('Transpiler accounts for user variable names when transforming import statements', () => { - mockedModuleFile.mockImplementation((name, type) => { - if (type === 'json') { - return name === 'one_module' ? "{ foo: 'foo' }" : "{ bar: 'bar' }" - } else { - return 'undefined' - } - }) - +test('Transpiler accounts for user variable names when transforming import statements', async () => { const code = stripIndent` - import { foo } from "test/one_module"; - import { bar as __MODULE__2 } from "test/another_module"; + import { foo } from "one_module"; + import { bar as __MODULE__2 } from "another_module"; const __MODULE__ = 'test0'; const __MODULE__0 = 'test1'; foo(bar); ` const context = mockContext(4) const program = parse(code, context)! - const [, importNodes, [varDecl0, varDecl1]] = transformImportDeclarations( + const [, importNodes, [varDecl0, varDecl1]] = await transformImportDeclarations( program, + context, new Set(['__MODULE__', '__MODULE__0']), + false, false ) @@ -95,42 +88,38 @@ test('Transpiler accounts for user variable names when transforming import state ).toEqual('__MODULE__3') }) -test('checkForUndefinedVariables accounts for import statements', () => { - mockedModuleFile.mockImplementation((name, type) => { - if (type === 'json') { - return "{ hello: 'hello' }" - } else { - return 'undefined' - } - }) - +test('checkForUndefinedVariables accounts for import statements', async () => { const code = stripIndent` import { foo } from "one_module"; foo; ` const context = mockContext(Chapter.SOURCE_4) const program = parse(code, context)! - transpile(program, context, false) + await transpile(program, context, false) }) -test('importing undefined variables should throw errors', () => { - mockedModuleFile.mockImplementation((name, type) => { - if (type === 'json') { - return '{}' - } else { - return 'undefined' - } - }) - +test('importing undefined variables should throw errors', async () => { const code = stripIndent` import { hello } from 'one_module'; ` const context = mockContext(Chapter.SOURCE_4) const program = parse(code, context)! try { - transpile(program, context, false) + await transpile(program, context, false) } catch (error) { expect(error).toBeInstanceOf(UndefinedImportError) expect((error as UndefinedImportError).symbol).toEqual('hello') } }) + +test('Module loading functionality', async () => { + const code = stripIndent` + import { foo } from 'one_module'; + foo(); + ` + const context = mockContext(Chapter.SOURCE_4) + const result = await runInContext(code, context) + expect(result.status).toEqual('finished') + + expect((result as Value).value).toEqual('foo') +}) diff --git a/src/transpiler/__tests__/transpiled-code.ts b/src/transpiler/__tests__/transpiled-code.ts index 104ff6cbd..54d5ba3fb 100644 --- a/src/transpiler/__tests__/transpiled-code.ts +++ b/src/transpiler/__tests__/transpiled-code.ts @@ -9,10 +9,10 @@ import { transpile } from '../transpiler' * code being tested from being transformed into eval. * Check for variables being stored back by looking at all the tests. */ -test('builtins do get prepended', () => { +test('builtins do get prepended', async () => { const code = '"ensure_builtins";' const context = mockContext(Chapter.SOURCE_4) - const transpiled = transpile(parse(code, context)!, context).transpiled + const { transpiled } = await transpile(parse(code, context)!, context) // replace native[] as they may be inconsistent const replacedNative = transpiled.replace(/native\[\d+]/g, 'native') // replace the line hiding globals as they may differ between environments @@ -20,7 +20,7 @@ test('builtins do get prepended', () => { expect({ code, transpiled: replacedGlobalsLine }).toMatchSnapshot() }) -test('Ensure no name clashes', () => { +test('Ensure no name clashes', async () => { const code = stripIndent` const boolOrErr = 1; boolOrErr[123] = 1; @@ -32,7 +32,7 @@ test('Ensure no name clashes', () => { const native = 123; ` const context = mockContext(Chapter.SOURCE_4) - const transpiled = transpile(parse(code, context)!, context).transpiled + const { transpiled } = await transpile(parse(code, context)!, context) const replacedNative = transpiled.replace(/native0\[\d+]/g, 'native') const replacedGlobalsLine = replacedNative.replace(/\n\(\(.*\)/, '\n(( )') expect(replacedGlobalsLine).toMatchSnapshot() diff --git a/src/transpiler/transpiler.ts b/src/transpiler/transpiler.ts index 242aee7bc..570ee6fc4 100644 --- a/src/transpiler/transpiler.ts +++ b/src/transpiler/transpiler.ts @@ -6,9 +6,11 @@ import { RawSourceMap, SourceMapGenerator } from 'source-map' import { NATIVE_STORAGE_ID, REQUIRE_PROVIDER_ID, UNKNOWN_LOCATION } from '../constants' import { UndefinedVariable } from '../errors/errors' -import { UndefinedImportError } from '../modules/errors' -import { memoizedGetModuleFile, memoizedloadModuleDocs } from '../modules/moduleLoader' -import { ModuleDocumentation } from '../modules/moduleTypes' +import { + memoizedGetModuleBundleAsync, + memoizedGetModuleDocsAsync +} from '../modules/moduleLoaderAsync' +import { reduceImportNodesAsync } from '../modules/utils' import { AllowedDeclarations, Chapter, Context, NativeStorage, Variant } from '../types' import * as create from '../utils/astCreator' import { @@ -40,13 +42,15 @@ const globalIdNames = [ export type NativeIds = Record -export function transformImportDeclarations( +export async function transformImportDeclarations( program: es.Program, + context: Context | null, usedIdentifiers: Set, checkImports: boolean, + loadTabs: boolean, nativeId?: es.Identifier, useThis: boolean = false -): [string, es.VariableDeclaration[], es.Program['body']] { +): Promise<[string, es.VariableDeclaration[], es.Program['body']]> { const [importNodes, otherNodes] = partition( program.body, node => node.type === 'ImportDeclaration' @@ -54,72 +58,94 @@ export function transformImportDeclarations( if (importNodes.length === 0) return ['', [], otherNodes] - const moduleInfos = importNodes.reduce( - (res, node: es.ImportDeclaration) => { - const moduleName = node.source.value - if (typeof moduleName !== 'string') { - throw new Error( - `Expected ImportDeclaration to have a source of type string, got ${moduleName}` + const moduleInfos = await reduceImportNodesAsync( + importNodes as es.ImportDeclaration[], + context, + loadTabs, + checkImports, + (name, node) => memoizedGetModuleBundleAsync(name, node), + async (name, info, node) => { + const docs = await memoizedGetModuleDocsAsync(name, node) + if (!docs) return null + return new Set(Object.keys(docs)) + }, + { + ImportSpecifier(specifier: es.ImportSpecifier, node, { namespaced }) { + return create.constantDeclaration( + specifier.local.name, + create.memberExpression(create.identifier(namespaced!), specifier.imported.name) ) + }, + ImportDefaultSpecifier(specifier, node, { namespaced }) { + return create.constantDeclaration( + specifier.local.name, + create.memberExpression(create.identifier(namespaced!), 'default') + ) + }, + ImportNamespaceSpecifier(specifier, node, { namespaced }) { + return create.constantDeclaration(specifier.local.name, create.identifier(namespaced!)) } - - if (!(moduleName in res)) { - res[moduleName] = { - text: memoizedGetModuleFile(moduleName, 'bundle'), - nodes: [], - docs: checkImports ? memoizedloadModuleDocs(moduleName, node) : null - } - } - - res[moduleName].nodes.push(node) - node.specifiers.forEach(spec => usedIdentifiers.add(spec.local.name)) - return res }, - {} as Record< - string, - { - nodes: es.ImportDeclaration[] - text: string - docs: ModuleDocumentation | null - } - > + usedIdentifiers ) - const prefix: string[] = [] - const declNodes = Object.entries(moduleInfos).flatMap(([moduleName, { nodes, text, docs }]) => { - const namespaced = getUniqueId(usedIdentifiers, '__MODULE__') - prefix.push(`// ${moduleName} module`) - - const modifiedText = nativeId - ? `${nativeId.name}.operators.get("wrapSourceModule")("${moduleName}", ${text}, ${REQUIRE_PROVIDER_ID})` - : `(${text})(${REQUIRE_PROVIDER_ID})` - prefix.push(`const ${namespaced} = ${modifiedText}\n`) - - return nodes.flatMap(node => - node.specifiers.map(specifier => { - if (specifier.type !== 'ImportSpecifier') { - throw new Error(`Expected import specifier, found: ${specifier.type}`) + const [prefix, declNodes] = Object.entries(moduleInfos).reduce( + ( + [prefixes, nodes], + [ + moduleName, + { + content, + info: { content: text, namespaced } } + ] + ) => { + prefixes.push(`// ${moduleName} module`) - if (checkImports) { - if (!docs) { - console.warn(`Failed to load docs for ${moduleName}, skipping typechecking`) - } else if (!(specifier.imported.name in docs)) { - throw new UndefinedImportError(specifier.imported.name, moduleName, node) - } - } + const modifiedText = nativeId + ? `${nativeId.name}.operators.get("wrapSourceModule")("${moduleName}", ${text}, ${REQUIRE_PROVIDER_ID})` + : `(${text})(${REQUIRE_PROVIDER_ID})` + prefixes.push(`const ${namespaced} = ${modifiedText}\n`) - // Convert each import specifier to its corresponding local variable declaration - return create.constantDeclaration( - specifier.local.name, - create.memberExpression( - create.identifier(`${useThis ? 'this.' : ''}${namespaced}`), - specifier.imported.name - ) - ) - }) - ) - }) + return [prefixes, [...nodes, ...content]] + }, + [[], []] as [string[], es.VariableDeclaration[]] + ) + + // const declNodes = Object.entries(moduleInfos).flatMap(([moduleName, { nodes, text, docs }]) => { + // const namespaced = getUniqueId(usedIdentifiers, '__MODULE__') + // prefix.push(`// ${moduleName} module`) + + // const modifiedText = nativeId + // ? `${nativeId.name}.operators.get("wrapSourceModule")("${moduleName}", ${text}, ${REQUIRE_PROVIDER_ID})` + // : `(${text})(${REQUIRE_PROVIDER_ID})` + // prefix.push(`const ${namespaced} = ${modifiedText}\n`) + + // return nodes.flatMap(node => + // node.specifiers.map(specifier => { + // if (specifier.type !== 'ImportSpecifier') { + // throw new Error(`Expected import specifier, found: ${specifier.type}`) + // } + + // if (checkImports) { + // if (!docs) { + // console.warn(`Failed to load docs for ${moduleName}, skipping typechecking`) + // } else if (!(specifier.imported.name in docs)) { + // throw new UndefinedImportError(specifier.imported.name, moduleName, node) + // } + // } + + // // Convert each import specifier to its corresponding local variable declaration + // return create.constantDeclaration( + // specifier.local.name, + // create.memberExpression( + // create.identifier(`${useThis ? 'this.' : ''}${namespaced}`), + // specifier.imported.name + // ) + // ) + // }) + // ) + // }) return [prefix.join('\n'), declNodes, otherNodes] } @@ -601,11 +627,11 @@ function getDeclarationsToAccessTranspilerInternals( export type TranspiledResult = { transpiled: string; sourceMapJson?: RawSourceMap } -function transpileToSource( +async function transpileToSource( program: es.Program, context: Context, skipUndefined: boolean -): TranspiledResult { +): Promise { const usedIdentifiers = new Set([ ...getIdentifiersInProgram(program), ...getIdentifiersInNativeStorage(context.nativeStorage) @@ -628,10 +654,12 @@ function transpileToSource( wrapArrowFunctionsToAllowNormalCallsAndNiceToString(program, functionsToStringMap, globalIds) addInfiniteLoopProtection(program, globalIds, usedIdentifiers) - const [modulePrefix, importNodes, otherNodes] = transformImportDeclarations( + const [modulePrefix, importNodes, otherNodes] = await transformImportDeclarations( program, + context, usedIdentifiers, true, + true, globalIds.native ) program.body = (importNodes as es.Program['body']).concat(otherNodes) @@ -658,11 +686,12 @@ function transpileToSource( return { transpiled, sourceMapJson } } -function transpileToFullJS( +async function transpileToFullJS( program: es.Program, context: Context, + wrapSourceModules: boolean, skipUndefined: boolean -): TranspiledResult { +): Promise { const usedIdentifiers = new Set([ ...getIdentifiersInProgram(program), ...getIdentifiersInNativeStorage(context.nativeStorage) @@ -671,11 +700,13 @@ function transpileToFullJS( const globalIds = getNativeIds(program, usedIdentifiers) checkForUndefinedVariables(program, context.nativeStorage, globalIds, skipUndefined) - const [modulePrefix, importNodes, otherNodes] = transformImportDeclarations( + const [modulePrefix, importNodes, otherNodes] = await transformImportDeclarations( program, + context, usedIdentifiers, false, - globalIds.native + true, + wrapSourceModules ? globalIds.native : undefined ) const transpiledProgram: es.Program = create.program([ @@ -696,11 +727,11 @@ export function transpile( program: es.Program, context: Context, skipUndefined = false -): TranspiledResult { +): Promise { if (context.chapter === Chapter.FULL_JS) { - return transpileToFullJS(program, context, true) + return transpileToFullJS(program, context, false, true) } else if (context.variant == Variant.NATIVE) { - return transpileToFullJS(program, context, false) + return transpileToFullJS(program, context, false, false) } else { return transpileToSource(program, context, skipUndefined) } diff --git a/src/utils/testing.ts b/src/utils/testing.ts index e3dd710d5..7defb037d 100644 --- a/src/utils/testing.ts +++ b/src/utils/testing.ts @@ -141,7 +141,7 @@ async function testInContext(code: string, options: TestOptions): Promise Date: Tue, 4 Apr 2023 11:08:29 +0800 Subject: [PATCH 13/95] Unify transpiler and ECE imports --- .../__tests__/ec-evaluator-errors.ts | 15 ++- src/ec-evaluator/interpreter.ts | 8 +- src/modules/utils.ts | 118 ++++++++++++++---- src/transpiler/__tests__/modules.ts | 2 +- src/transpiler/transpiler.ts | 4 +- 5 files changed, 110 insertions(+), 37 deletions(-) diff --git a/src/ec-evaluator/__tests__/ec-evaluator-errors.ts b/src/ec-evaluator/__tests__/ec-evaluator-errors.ts index 1033c9e7a..b82bbe70b 100644 --- a/src/ec-evaluator/__tests__/ec-evaluator-errors.ts +++ b/src/ec-evaluator/__tests__/ec-evaluator-errors.ts @@ -1,5 +1,6 @@ /* tslint:disable:max-line-length */ import * as moduleLoader from '../../modules/moduleLoaderAsync' +import * as moduleUtils from '../../modules/utils' import { Chapter, Variant } from '../../types' import { stripIndent } from '../../utils/formatters' import { @@ -24,11 +25,15 @@ jest.spyOn(moduleLoader, 'memoizedGetModuleBundleAsync').mockResolvedValue(` bar: () => 'bar' }) `) -jest - .spyOn(moduleLoader, 'memoizedGetModuleDocsAsync') - .mockImplementation(name => - Promise.resolve>(name === 'one_module' ? { foo: 'foo' } : { bar: 'bar' }) - ) +jest.spyOn(moduleLoader, 'memoizedGetModuleDocsAsync').mockResolvedValue({ + foo: 'foo', + bar: 'bar' + }) + +jest.spyOn(moduleUtils, 'initModuleContextAsync').mockImplementation(() => { + console.log('called') + return Promise.resolve() +}) const undefinedVariable = stripIndent` im_undefined; diff --git a/src/ec-evaluator/interpreter.ts b/src/ec-evaluator/interpreter.ts index 80eab1bba..5405ad44f 100644 --- a/src/ec-evaluator/interpreter.ts +++ b/src/ec-evaluator/interpreter.ts @@ -14,7 +14,7 @@ import * as errors from '../errors/errors' import { RuntimeSourceError } from '../errors/runtimeSourceError' import Closure from '../interpreter/closure' import { loadModuleBundleAsync } from '../modules/moduleLoaderAsync' -import { reduceImportNodesAsync } from '../modules/utils' +import { transformImportNodesAsync } from '../modules/utils' import { checkEditorBreakpoints } from '../stdlib/inspector' import { Context, ContiguousArrayElements, Result, Value } from '../types' import * as ast from '../utils/astCreator' @@ -105,7 +105,7 @@ export async function evaluate(program: es.Program, context: Context): Promise loadModuleBundleAsync(name, context, node), - (name, info) => (info.content ? new Set(Object.keys(info.content)) : null), + (name, info) => Promise.resolve(new Set(Object.keys(info.content))), { ImportSpecifier: (spec: es.ImportSpecifier, node, info) => { declareIdentifier(context, spec.local.name, node, environment) diff --git a/src/modules/utils.ts b/src/modules/utils.ts index 0f3f3b07b..e703932e2 100644 --- a/src/modules/utils.ts +++ b/src/modules/utils.ts @@ -16,7 +16,7 @@ export async function initModuleContext( loadTabs: boolean, node?: Node ) { - if (!(moduleName in context)) { + if (!(moduleName in context.moduleContexts)) { context.moduleContexts[moduleName] = { state: null, tabs: loadTabs ? loadModuleTabs(moduleName, node) : null @@ -32,7 +32,7 @@ export async function initModuleContextAsync( loadTabs: boolean, node?: Node ) { - if (!(moduleName in context)) { + if (!(moduleName in context.moduleContexts)) { context.moduleContexts[moduleName] = { state: null, tabs: loadTabs ? await loadModuleTabsAsync(moduleName, node) : null @@ -42,31 +42,85 @@ export async function initModuleContextAsync( } } +/** + * Represents a loaded Source module + */ export type ModuleInfo = { + /** + * List of symbols exported by the module. This field is `null` if `checkImports` is `false`. + */ docs: Set | null + + /** + * `ImportDeclarations` that import from this module. + */ nodes: ImportDeclaration[] - content: T | null + + /** + * Represents the loaded module. It can be the module's functions itself (see the ec-evaluator), + * or just the module text (see the transpiler), or any other type. + * + * This field should not be null when the function returns. + */ + content: T + + /** + * The unique name given to this module. If `usedIdentifiers` is not provided, this field will be `null`. + */ namespaced: string | null } +/** + * Function that converts an `ImportSpecifier` into the given Transformed type. + * It can be used as a `void` returning function as well, in case the specifiers + * don't need to be transformed, just acted upon. + * @example + * ImportSpecifier(specifier, node, info) => { + * return create.constantDeclaration( + * spec.local.name, + * create.memberExpression( + * create.identifier(info.namespaced), + * spec.imported.name + * ), + * ) + * } + */ export type SpecifierProcessor = ( spec: ImportDeclaration['specifiers'][0], node: ImportDeclaration, moduleInfo: ModuleInfo ) => Transformed +/** + * Function to obtain the set of symbols exported by the given module + */ type SymbolLoader = ( name: string, info: ModuleInfo, node?: Node -) => Promise | null> | Set | null +) => Promise | null> export type ImportSpecifierType = | 'ImportSpecifier' | 'ImportDefaultSpecifier' | 'ImportNamespaceSpecifier' -export async function reduceImportNodesAsync( +/** + * This function is intended to unify how each of the different Source runners load imports. It handles + * import checking (if `checkImports` is given as `true`), namespacing (if `usedIdentifiers` is provided), + * loading the module's context (if `context` is not `null`), loading the module's tabs (if `loadTabs` is given as `true`) and the conversion + * of import specifiers to the relevant type used by the runner. + * @param nodes Nodes to transform + * @param context Context to transform with, or `null`. Setting this to null prevents module contexts and tabs from being loaded. + * @param loadTabs Set this to false to prevent tabs from being loaded even if a context is provided. + * @param checkImports Pass true to enable checking for undefined imports, false to skip these checks + * @param moduleLoader Function that takes the name of the module and returns its loaded representation. + * @param symbolsLoader Function that takes a loaded module and returns a set containing its exported symbols + * @param processors Functions for working with each type of import specifier. + * @param usedIdentifiers Set containing identifiers already used in code. If null, namespacing is not conducted. + * @returns The loaded modules, along with the transformed versions of the given nodes + */ +export async function transformImportNodesAsync( nodes: ImportDeclaration[], context: Context | null, loadTabs: boolean, @@ -96,52 +150,64 @@ export async function reduceImportNodesAsync( } if (!(moduleName in res)) { - promises.push( - internalLoader(moduleName, node).then(content => { - res[moduleName].content = content - }) - ) - - if (checkImports) { - const docsResult = symbolsLoader(moduleName, res[moduleName], node) - if (docsResult instanceof Promise) { - promises.push( - docsResult.then(docs => { - res[moduleName].docs = docs - }) - ) - } else { - res[moduleName].docs = docsResult - } - } + // First time we are loading this module res[moduleName] = { docs: null, nodes: [], - content: null, + content: null as any, namespaced: null } + let loadPromise = internalLoader(moduleName, node).then(content => { + res[moduleName].content = content + }) + + if (checkImports) { + // symbolsLoader must run after internalLoader finishes loading as it may need the + // loaded module. + loadPromise = loadPromise.then(() => { + symbolsLoader(moduleName, res[moduleName], node) + .then(docs => { + res[moduleName].docs = docs + }) + }) + } + promises.push(loadPromise) } res[moduleName].nodes.push(node) - node.specifiers.forEach(spec => usedIdentifiers?.add(spec.local.name)) + + // Collate all the identifiers introduced by specifiers to prevent collisions when + // the import declaration has aliases, e.g import { show as __MODULE__ } from 'rune'; + if (usedIdentifiers) { + node.specifiers.forEach(spec => usedIdentifiers.add(spec.local.name)) + } return res }, {} as Record>) + // Wait for all module and symbol loading to finish await Promise.all(promises) return Object.entries(moduleInfos).reduce((res, [moduleName, info]) => { + // Now for each module, we give it a unique namespaced id const namespaced = usedIdentifiers ? getUniqueId(usedIdentifiers, '__MODULE__') : null info.namespaced = namespaced if (checkImports && info.docs === null) { console.warn(`Failed to load documentation for ${moduleName}, skipping typechecking`) } + + if (info.content === null) { + throw new Error(`${moduleName} was not loaded properly. This should never happen`) + } + return { ...res, [moduleName]: { content: info.nodes.flatMap(node => node.specifiers.flatMap(spec => { if (checkImports && info.docs) { + // Conduct import checking if checkImports is true and the symbols were + // successfully loaded (not null) switch (spec.type) { case 'ImportSpecifier': { if (!info.docs.has(spec.imported.name)) @@ -160,6 +226,8 @@ export async function reduceImportNodesAsync( } } } + // Finally, transform that specifier into the form needed + // by the runner return processors[spec.type](spec, node, info) }) ), diff --git a/src/transpiler/__tests__/modules.ts b/src/transpiler/__tests__/modules.ts index 9996498dd..e0d64bb11 100644 --- a/src/transpiler/__tests__/modules.ts +++ b/src/transpiler/__tests__/modules.ts @@ -1,6 +1,6 @@ import type { Identifier, Literal, MemberExpression, VariableDeclaration } from 'estree' -import { runInContext } from '../..' +import { runInContext } from '../..' import { mockContext } from '../../mocks/context' import { UndefinedImportError } from '../../modules/errors' import * as moduleLoader from '../../modules/moduleLoaderAsync' diff --git a/src/transpiler/transpiler.ts b/src/transpiler/transpiler.ts index 570ee6fc4..7a9e70ade 100644 --- a/src/transpiler/transpiler.ts +++ b/src/transpiler/transpiler.ts @@ -10,7 +10,7 @@ import { memoizedGetModuleBundleAsync, memoizedGetModuleDocsAsync } from '../modules/moduleLoaderAsync' -import { reduceImportNodesAsync } from '../modules/utils' +import { transformImportNodesAsync } from '../modules/utils' import { AllowedDeclarations, Chapter, Context, NativeStorage, Variant } from '../types' import * as create from '../utils/astCreator' import { @@ -58,7 +58,7 @@ export async function transformImportDeclarations( if (importNodes.length === 0) return ['', [], otherNodes] - const moduleInfos = await reduceImportNodesAsync( + const moduleInfos = await transformImportNodesAsync( importNodes as es.ImportDeclaration[], context, loadTabs, From 587a27654008f7bd29373f4c695081768f8d6911 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Tue, 4 Apr 2023 11:09:09 +0800 Subject: [PATCH 14/95] Ran format --- src/ec-evaluator/__tests__/ec-evaluator-errors.ts | 6 +++--- src/modules/utils.ts | 13 ++++++------- 2 files changed, 9 insertions(+), 10 deletions(-) diff --git a/src/ec-evaluator/__tests__/ec-evaluator-errors.ts b/src/ec-evaluator/__tests__/ec-evaluator-errors.ts index b82bbe70b..56a633cee 100644 --- a/src/ec-evaluator/__tests__/ec-evaluator-errors.ts +++ b/src/ec-evaluator/__tests__/ec-evaluator-errors.ts @@ -26,9 +26,9 @@ jest.spyOn(moduleLoader, 'memoizedGetModuleBundleAsync').mockResolvedValue(` }) `) jest.spyOn(moduleLoader, 'memoizedGetModuleDocsAsync').mockResolvedValue({ - foo: 'foo', - bar: 'bar' - }) + foo: 'foo', + bar: 'bar' +}) jest.spyOn(moduleUtils, 'initModuleContextAsync').mockImplementation(() => { console.log('called') diff --git a/src/modules/utils.ts b/src/modules/utils.ts index e703932e2..73ca7eccd 100644 --- a/src/modules/utils.ts +++ b/src/modules/utils.ts @@ -55,11 +55,11 @@ export type ModuleInfo = { * `ImportDeclarations` that import from this module. */ nodes: ImportDeclaration[] - + /** * Represents the loaded module. It can be the module's functions itself (see the ec-evaluator), * or just the module text (see the transpiler), or any other type. - * + * * This field should not be null when the function returns. */ content: T @@ -162,13 +162,12 @@ export async function transformImportNodesAsync( }) if (checkImports) { - // symbolsLoader must run after internalLoader finishes loading as it may need the + // symbolsLoader must run after internalLoader finishes loading as it may need the // loaded module. loadPromise = loadPromise.then(() => { - symbolsLoader(moduleName, res[moduleName], node) - .then(docs => { - res[moduleName].docs = docs - }) + symbolsLoader(moduleName, res[moduleName], node).then(docs => { + res[moduleName].docs = docs + }) }) } promises.push(loadPromise) From 7243a3c8082cde9d7d264dbef7bc3a3c91a748a0 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Thu, 20 Apr 2023 00:19:31 +0800 Subject: [PATCH 15/95] Add async module loader code --- src/modules/errors.ts | 62 ++++++++++++++++++++++++++++-- src/modules/moduleLoader.ts | 65 +++++++++++++++++++++----------- src/modules/moduleLoaderAsync.ts | 21 ++++++++--- src/modules/moduleTypes.ts | 7 ++++ src/modules/requireProvider.ts | 7 ++-- src/modules/utils.ts | 26 ++++++++----- 6 files changed, 144 insertions(+), 44 deletions(-) diff --git a/src/modules/errors.ts b/src/modules/errors.ts index 6c643d58b..da6447773 100644 --- a/src/modules/errors.ts +++ b/src/modules/errors.ts @@ -1,12 +1,60 @@ -import type { ImportDeclaration } from 'estree' +import type { ExportAllDeclaration, ExportNamedDeclaration, ImportDeclaration, Node } from 'estree' import { RuntimeSourceError } from '../errors/runtimeSourceError' +export class ModuleConnectionError extends RuntimeSourceError { + private static message: string = `Unable to get modules.` + private static elaboration: string = `You should check your Internet connection, and ensure you have used the correct module path.` + constructor(public readonly error?: any, node?: Node) { + super(node) + } + + public explain() { + return ModuleConnectionError.message + } + + public elaborate() { + return ModuleConnectionError.elaboration + } +} + +export class ModuleNotFoundError extends RuntimeSourceError { + constructor(public moduleName: string, node?: Node) { + super(node) + } + + public explain() { + return `Module "${this.moduleName}" not found.` + } + + public elaborate() { + return ` + You should check your import declarations, and ensure that all are valid modules. + ` + } +} + +export class ModuleInternalError extends RuntimeSourceError { + constructor(public moduleName: string, public error?: any, node?: Node) { + super(node) + } + + public explain() { + return `Error(s) occured when executing the module "${this.moduleName}".` + } + + public elaborate() { + return ` + You may need to contact with the author for this module to fix this error. + ` + } +} + export class UndefinedImportError extends RuntimeSourceError { constructor( public readonly symbol: string, public readonly moduleName: string, - node?: ImportDeclaration + node?: ImportDeclaration | ExportNamedDeclaration | ExportAllDeclaration ) { super(node) } @@ -21,7 +69,10 @@ export class UndefinedImportError extends RuntimeSourceError { } export class UndefinedDefaultImportError extends RuntimeSourceError { - constructor(public readonly moduleName: string, node?: ImportDeclaration) { + constructor( + public readonly moduleName: string, + node?: ImportDeclaration | ExportNamedDeclaration | ExportAllDeclaration + ) { super(node) } @@ -34,7 +85,10 @@ export class UndefinedDefaultImportError extends RuntimeSourceError { } } export class UndefinedNamespaceImportError extends RuntimeSourceError { - constructor(public readonly moduleName: string, node?: ImportDeclaration) { + constructor( + public readonly moduleName: string, + node?: ImportDeclaration | ExportNamedDeclaration | ExportAllDeclaration + ) { super(node) } diff --git a/src/modules/moduleLoader.ts b/src/modules/moduleLoader.ts index 2e05e67ce..57cdea3c7 100644 --- a/src/modules/moduleLoader.ts +++ b/src/modules/moduleLoader.ts @@ -2,14 +2,15 @@ import es from 'estree' import { memoize } from 'lodash' import { XMLHttpRequest as NodeXMLHttpRequest } from 'xmlhttprequest-ts' -import { - ModuleConnectionError, - ModuleInternalError, - ModuleNotFoundError -} from '../errors/moduleErrors' import { Context } from '../types' import { wrapSourceModule } from '../utils/operators' -import { ModuleBundle, ModuleDocumentation, ModuleFunctions, ModuleManifest } from './moduleTypes' +import { ModuleConnectionError, ModuleInternalError, ModuleNotFoundError } from './errors' +import type { + ModuleBundle, + ModuleDocumentation, + ModuleFunctions, + ModuleManifest +} from './moduleTypes' import { getRequireProvider } from './requireProvider' // Supports both JSDom (Web Browser) environment and Node environment @@ -47,22 +48,36 @@ export function httpGet(url: string): string { */ export const memoizedGetModuleManifest = memoize(getModuleManifest) function getModuleManifest(): ModuleManifest { - const rawManifest = httpGet(`${MODULES_STATIC_URL}/modules.json`) - return JSON.parse(rawManifest) + try { + const rawManifest = httpGet(`${MODULES_STATIC_URL}/modules.json`) + return JSON.parse(rawManifest) + } catch (error) { + throw new ModuleConnectionError(error) + } } -/** - * Send a HTTP GET request to the modules endpoint to retrieve the specified file - * @return String of module file contents - */ +export const memoizedGetBundle = memoize(getModuleBundle) +function getModuleBundle(path: string) { + return httpGet(`${MODULES_STATIC_URL}/bundles/${path}.js`) +} -const memoizedGetModuleFileInternal = memoize(getModuleFile) -export const memoizedGetModuleFile = (name: string, type: 'tab' | 'bundle' | 'json') => - memoizedGetModuleFileInternal({ name, type }) -function getModuleFile({ name, type }: { name: string; type: 'tab' | 'bundle' | 'json' }): string { - return httpGet(`${MODULES_STATIC_URL}/${type}s/${name}.js${type === 'json' ? 'on' : ''}`) +export const memoizedGetTab = memoize(getModuleTab) +function getModuleTab(path: string) { + return httpGet(`${MODULES_STATIC_URL}/tabs/${path}.js`) } +// /** +// * Send a HTTP GET request to the modules endpoint to retrieve the specified file +// * @return String of module file contents +// */ + +// const memoizedGetModuleFileInternal = memoize(getModuleFile) +// export const memoizedGetModuleFile = (name: string, type: 'tab' | 'bundle' | 'json') => +// memoizedGetModuleFileInternal({ name, type }) +// function getModuleFile({ name, type }: { name: string; type: 'tab' | 'bundle' | 'json' }): string { +// return httpGet(`${MODULES_STATIC_URL}/${type}s/${name}.js${type === 'json' ? 'on' : ''}`) +// } + /** * Loads the respective module package (functions from the module) * @param path imported module name @@ -70,7 +85,12 @@ function getModuleFile({ name, type }: { name: string; type: 'tab' | 'bundle' | * @param node import declaration node * @returns the module's functions object */ -export function loadModuleBundle(path: string, context: Context, node?: es.Node): ModuleFunctions { +export function loadModuleBundle( + path: string, + context: Context, + wrapModules: boolean, + node?: es.Node +): ModuleFunctions { const modules = memoizedGetModuleManifest() // Check if the module exists @@ -78,9 +98,10 @@ export function loadModuleBundle(path: string, context: Context, node?: es.Node) if (moduleList.includes(path) === false) throw new ModuleNotFoundError(path, node) // Get module file - const moduleText = memoizedGetModuleFile(path, 'bundle') + const moduleText = memoizedGetBundle(path) try { const moduleBundle: ModuleBundle = eval(moduleText) + if (wrapModules) return moduleBundle(getRequireProvider(context)) return wrapSourceModule(path, moduleBundle, getRequireProvider(context)) } catch (error) { // console.error("bundle error: ", error) @@ -105,7 +126,7 @@ export function loadModuleTabs(path: string, node?: es.Node) { const sideContentTabPaths: string[] = modules[path].tabs // Load the tabs for the current module return sideContentTabPaths.map(path => { - const rawTabFile = memoizedGetModuleFile(path, 'tab') + const rawTabFile = memoizedGetTab(path) try { return eval(rawTabFile) } catch (error) { @@ -115,14 +136,14 @@ export function loadModuleTabs(path: string, node?: es.Node) { }) } -export const memoizedloadModuleDocs = memoize(loadModuleDocs) +export const memoizedGetModuleDocs = memoize(loadModuleDocs) export function loadModuleDocs(path: string, node?: es.Node) { try { const modules = memoizedGetModuleManifest() // Check if the module exists const moduleList = Object.keys(modules) if (!moduleList.includes(path)) throw new ModuleNotFoundError(path, node) - const result = getModuleFile({ name: path, type: 'json' }) + const result = httpGet(`${MODULES_STATIC_URL}/jsons/${path}.json`) return JSON.parse(result) as ModuleDocumentation } catch (error) { console.warn('Failed to load module documentation') diff --git a/src/modules/moduleLoaderAsync.ts b/src/modules/moduleLoaderAsync.ts index 253937cd0..6b3602604 100644 --- a/src/modules/moduleLoaderAsync.ts +++ b/src/modules/moduleLoaderAsync.ts @@ -2,8 +2,8 @@ import { Node } from 'estree' import { memoize } from 'lodash' import type { Context } from '..' -import { ModuleInternalError, ModuleNotFoundError } from '../errors/moduleErrors' import { wrapSourceModule } from '../utils/operators' +import { ModuleConnectionError, ModuleInternalError, ModuleNotFoundError } from './errors' import { httpGet, MODULES_STATIC_URL } from './moduleLoader' import type { ModuleBundle, ModuleDocumentation, ModuleManifest } from './moduleTypes' import { getRequireProvider } from './requireProvider' @@ -24,8 +24,12 @@ async function httpGetAsync(path: string) { */ export const memoizedGetModuleManifestAsync = memoize(getModuleManifestAsync) async function getModuleManifestAsync(): Promise { - const rawManifest = await httpGetAsync(`${MODULES_STATIC_URL}/modules.json`) - return JSON.parse(rawManifest) + try { + const rawManifest = await httpGetAsync(`${MODULES_STATIC_URL}/modules.json`) + return JSON.parse(rawManifest) + } catch (error) { + throw new ModuleConnectionError(error) + } } async function checkModuleExists(moduleName: string, node?: Node) { @@ -79,12 +83,19 @@ export async function loadModuleTabsAsync(moduleName: string, node?: Node) { ) } -export async function loadModuleBundleAsync(moduleName: string, context: Context, node?: Node) { +export async function loadModuleBundleAsync( + moduleName: string, + context: Context, + wrapModule: boolean, + node?: Node +) { await checkModuleExists(moduleName, node) const moduleText = await memoizedGetModuleBundleAsync(moduleName) try { const moduleBundle: ModuleBundle = eval(moduleText) - return wrapSourceModule(moduleName, moduleBundle, getRequireProvider(context)) + + if (wrapModule) return wrapSourceModule(moduleName, moduleBundle, getRequireProvider(context)) + return moduleBundle(getRequireProvider(context)) } catch (error) { // console.error("bundle error: ", error) throw new ModuleInternalError(moduleName, error, node) diff --git a/src/modules/moduleTypes.ts b/src/modules/moduleTypes.ts index f258dff49..a00162857 100644 --- a/src/modules/moduleTypes.ts +++ b/src/modules/moduleTypes.ts @@ -13,3 +13,10 @@ export type ModuleFunctions = { } export type ModuleDocumentation = Record + +export type ImportTransformOptions = { + checkImports: boolean + loadTabs: boolean + wrapModules: boolean + // useThis: boolean; +} diff --git a/src/modules/requireProvider.ts b/src/modules/requireProvider.ts index c3b6b7f12..fda194571 100644 --- a/src/modules/requireProvider.ts +++ b/src/modules/requireProvider.ts @@ -1,13 +1,13 @@ import * as jsslang from '..' import * as stdlib from '../stdlib' -import type { Context } from '../types' +import * as types from '../types' /** * Returns a function that simulates the job of Node's `require`. The require * provider is then used by Source modules to access the context and js-slang standard * library */ -export const getRequireProvider = (context: Context) => (x: string) => { +export const getRequireProvider = (context: types.Context) => (x: string) => { const pathSegments = x.split('/') const recurser = (obj: Record, segments: string[]): any => { @@ -21,7 +21,8 @@ export const getRequireProvider = (context: Context) => (x: string) => { 'js-slang': { ...jsslang, dist: { - stdlib + stdlib, + types }, context } diff --git a/src/modules/utils.ts b/src/modules/utils.ts index 73ca7eccd..286486f37 100644 --- a/src/modules/utils.ts +++ b/src/modules/utils.ts @@ -10,6 +10,9 @@ import { import { loadModuleTabs } from './moduleLoader' import { loadModuleTabsAsync } from './moduleLoaderAsync' +/** + * Create the module's context and load its tabs (if `loadTabs` is true) + */ export async function initModuleContext( moduleName: string, context: Context, @@ -26,6 +29,9 @@ export async function initModuleContext( } } +/** + * Create the module's context and load its tabs (if `loadTabs` is true) + */ export async function initModuleContextAsync( moduleName: string, context: Context, @@ -87,8 +93,8 @@ export type ModuleInfo = { */ export type SpecifierProcessor = ( spec: ImportDeclaration['specifiers'][0], - node: ImportDeclaration, - moduleInfo: ModuleInfo + moduleInfo: ModuleInfo, + node: ImportDeclaration ) => Transformed /** @@ -115,19 +121,19 @@ export type ImportSpecifierType = * @param loadTabs Set this to false to prevent tabs from being loaded even if a context is provided. * @param checkImports Pass true to enable checking for undefined imports, false to skip these checks * @param moduleLoader Function that takes the name of the module and returns its loaded representation. - * @param symbolsLoader Function that takes a loaded module and returns a set containing its exported symbols + * @param symbolsLoader Function that takes a loaded module and returns a set containing its exported symbols. This is used for import checking * @param processors Functions for working with each type of import specifier. * @param usedIdentifiers Set containing identifiers already used in code. If null, namespacing is not conducted. * @returns The loaded modules, along with the transformed versions of the given nodes */ -export async function transformImportNodesAsync( +export async function transformImportNodesAsync( nodes: ImportDeclaration[], context: Context | null, loadTabs: boolean, checkImports: boolean, - moduleLoader: (name: string, node?: Node) => Promise, - symbolsLoader: SymbolLoader, - processors: Record>, + moduleLoader: (name: string, node?: Node) => Promise, + symbolsLoader: SymbolLoader, + processors: Record>, usedIdentifiers?: Set ) { const internalLoader = async (name: string, node?: Node) => { @@ -181,7 +187,7 @@ export async function transformImportNodesAsync( node.specifiers.forEach(spec => usedIdentifiers.add(spec.local.name)) } return res - }, {} as Record>) + }, {} as Record>) // Wait for all module and symbol loading to finish await Promise.all(promises) @@ -227,11 +233,11 @@ export async function transformImportNodesAsync( } // Finally, transform that specifier into the form needed // by the runner - return processors[spec.type](spec, node, info) + return processors[spec.type](spec, info, node) }) ), info } } - }, {} as Record; content: Transformed[] }>) + }, {} as Record; content: Transformed[] }>) } From 27e29b3e9f52098614b264d62b7f1d89ac633824 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Thu, 20 Apr 2023 00:20:23 +0800 Subject: [PATCH 16/95] Consolidate import options into single object --- src/__tests__/environment.ts | 6 ++- src/ec-evaluator/interpreter.ts | 20 ++++---- src/errors/moduleErrors.ts | 52 --------------------- src/index.ts | 3 ++ src/infiniteLoops/instrument.ts | 9 ++-- src/interpreter/interpreter.ts | 7 ++- src/modules/__tests__/moduleLoader.ts | 11 +++-- src/name-extractor/index.ts | 8 ++-- src/runner/sourceRunner.ts | 12 +++-- src/stdlib/list.ts | 10 ++-- src/transpiler/__tests__/modules.ts | 33 ++++++++++---- src/transpiler/transpiler.ts | 66 +++++++-------------------- src/typeChecker/typeErrorChecker.ts | 2 +- 13 files changed, 94 insertions(+), 145 deletions(-) delete mode 100644 src/errors/moduleErrors.ts diff --git a/src/__tests__/environment.ts b/src/__tests__/environment.ts index e8d6cbe57..c0e43bbb2 100644 --- a/src/__tests__/environment.ts +++ b/src/__tests__/environment.ts @@ -18,7 +18,11 @@ test('Function params and body identifiers are in different environment', () => const context = mockContext(Chapter.SOURCE_4) context.prelude = null // hide the unneeded prelude const parsed = parse(code, context) - const it = evaluate(parsed as any as Program, context, false, false) + const it = evaluate(parsed as any as Program, context, { + loadTabs: false, + checkImports: false, + wrapModules: false + }) const stepsToComment = 13 // manually counted magic number for (let i = 0; i < stepsToComment; i += 1) { it.next() diff --git a/src/ec-evaluator/interpreter.ts b/src/ec-evaluator/interpreter.ts index 5405ad44f..9c48579b5 100644 --- a/src/ec-evaluator/interpreter.ts +++ b/src/ec-evaluator/interpreter.ts @@ -14,6 +14,7 @@ import * as errors from '../errors/errors' import { RuntimeSourceError } from '../errors/runtimeSourceError' import Closure from '../interpreter/closure' import { loadModuleBundleAsync } from '../modules/moduleLoaderAsync' +import { ImportTransformOptions } from '../modules/moduleTypes' import { transformImportNodesAsync } from '../modules/utils' import { checkEditorBreakpoints } from '../stdlib/inspector' import { Context, ContiguousArrayElements, Result, Value } from '../types' @@ -92,11 +93,15 @@ export class Stash extends Stack { * @param context The context to evaluate the program in. * @returns The result of running the ECE machine. */ -export async function evaluate(program: es.Program, context: Context): Promise { +export async function evaluate( + program: es.Program, + context: Context, + options: ImportTransformOptions +): Promise { try { context.runtime.isRunning = true - const nonImportNodes = await evaluateImports(program, context, true, true) + const nonImportNodes = await evaluateImports(program, context, options) context.runtime.agenda = new Agenda({ ...program, @@ -134,8 +139,7 @@ export function resumeEvaluate(context: Context) { async function evaluateImports( program: es.Program, context: Context, - loadTabs: boolean, - checkImports: boolean + { loadTabs, checkImports, wrapModules }: ImportTransformOptions ) { const [importNodes, otherNodes] = partition( program.body, @@ -151,18 +155,18 @@ async function evaluateImports( context, loadTabs, checkImports, - (name, node) => loadModuleBundleAsync(name, context, node), + (name, node) => loadModuleBundleAsync(name, context, wrapModules, node), (name, info) => Promise.resolve(new Set(Object.keys(info.content))), { - ImportSpecifier: (spec: es.ImportSpecifier, node, info) => { + ImportSpecifier: (spec: es.ImportSpecifier, info, node) => { declareIdentifier(context, spec.local.name, node, environment) defineVariable(context, spec.local.name, info.content![spec.imported.name], true, node) }, - ImportDefaultSpecifier: (spec, node, info) => { + ImportDefaultSpecifier: (spec, info, node) => { declareIdentifier(context, spec.local.name, node, environment) defineVariable(context, spec.local.name, info.content!['default'], true, node) }, - ImportNamespaceSpecifier: (spec, node, info) => { + ImportNamespaceSpecifier: (spec, info, node) => { declareIdentifier(context, spec.local.name, node, environment) defineVariable(context, spec.local.name, info.content!, true, node) } diff --git a/src/errors/moduleErrors.ts b/src/errors/moduleErrors.ts deleted file mode 100644 index 683d6089a..000000000 --- a/src/errors/moduleErrors.ts +++ /dev/null @@ -1,52 +0,0 @@ -/* tslint:disable: max-classes-per-file */ -import * as es from 'estree' - -import { RuntimeSourceError } from './runtimeSourceError' - -export class ModuleConnectionError extends RuntimeSourceError { - private static message: string = `Unable to get modules.` - private static elaboration: string = `You should check your Internet connection, and ensure you have used the correct module path.` - constructor(node?: es.Node) { - super(node) - } - - public explain() { - return ModuleConnectionError.message - } - - public elaborate() { - return ModuleConnectionError.elaboration - } -} - -export class ModuleNotFoundError extends RuntimeSourceError { - constructor(public moduleName: string, node?: es.Node) { - super(node) - } - - public explain() { - return `Module "${this.moduleName}" not found.` - } - - public elaborate() { - return ` - You should check your import declarations, and ensure that all are valid modules. - ` - } -} - -export class ModuleInternalError extends RuntimeSourceError { - constructor(public moduleName: string, public error?: any, node?: es.Node) { - super(node) - } - - public explain() { - return `Error(s) occured when executing the module "${this.moduleName}".` - } - - public elaborate() { - return ` - You may need to contact with the author for this module to fix this error. - ` - } -} diff --git a/src/index.ts b/src/index.ts index 5a25422d8..041414bc5 100644 --- a/src/index.ts +++ b/src/index.ts @@ -31,6 +31,7 @@ import { ECEResultPromise, resumeEvaluate } from './ec-evaluator/interpreter' import { CannotFindModuleError } from './errors/localImportErrors' import { validateFilePath } from './localImports/filePaths' import preprocessFileImports from './localImports/preprocessor' +import { ImportTransformOptions } from './modules/moduleTypes' import { getKeywords, getProgramNames, NameDeclaration } from './name-extractor' import { parse } from './parser/parser' import { parseWithComments } from './parser/utils' @@ -54,6 +55,8 @@ export interface IOptions { useSubst: boolean isPrelude: boolean throwInfiniteLoops: boolean + + importOptions: ImportTransformOptions } // needed to work on browsers diff --git a/src/infiniteLoops/instrument.ts b/src/infiniteLoops/instrument.ts index 8091f93af..bb75761d5 100644 --- a/src/infiniteLoops/instrument.ts +++ b/src/infiniteLoops/instrument.ts @@ -581,10 +581,11 @@ async function handleImports(programs: es.Program[]): Promise<[string, string[]] program, null, new Set(), - false, - false, - undefined, // create.identifier(NATIVE_STORAGE_ID), - false + { + checkImports: false, + loadTabs: false, + wrapModules: false + } ) program.body = (declNodes as es.Program['body']).concat(otherNodes) diff --git a/src/interpreter/interpreter.ts b/src/interpreter/interpreter.ts index 468cf86cb..4406ef556 100644 --- a/src/interpreter/interpreter.ts +++ b/src/interpreter/interpreter.ts @@ -12,7 +12,7 @@ import { UndefinedNamespaceImportError } from '../modules/errors' import { loadModuleBundle } from '../modules/moduleLoader' -import { ModuleFunctions } from '../modules/moduleTypes' +import { ImportTransformOptions, ModuleFunctions } from '../modules/moduleTypes' import { initModuleContext } from '../modules/utils' import { checkEditorBreakpoints } from '../stdlib/inspector' import { Context, ContiguousArrayElements, Environment, Frame, Value, Variant } from '../types' @@ -717,8 +717,7 @@ function getNonEmptyEnv(environment: Environment): Environment { export function* evaluateProgram( program: es.Program, context: Context, - checkImports: boolean, - loadTabs: boolean + { checkImports, loadTabs, wrapModules }: ImportTransformOptions ) { yield* visit(context, program) @@ -745,7 +744,7 @@ export function* evaluateProgram( if (!(moduleName in moduleFunctions)) { initModuleContext(moduleName, context, loadTabs, node) - moduleFunctions[moduleName] = loadModuleBundle(moduleName, context, node) + moduleFunctions[moduleName] = loadModuleBundle(moduleName, context, wrapModules, node) } const functions = moduleFunctions[moduleName] diff --git a/src/modules/__tests__/moduleLoader.ts b/src/modules/__tests__/moduleLoader.ts index d191d8fac..b0f04918d 100644 --- a/src/modules/__tests__/moduleLoader.ts +++ b/src/modules/__tests__/moduleLoader.ts @@ -1,7 +1,7 @@ import { createEmptyContext } from '../../createContext' -import { ModuleConnectionError, ModuleInternalError } from '../../errors/moduleErrors' import { Variant } from '../../types' import { stripIndent } from '../../utils/formatters' +import { ModuleConnectionError, ModuleInternalError } from '../errors' import * as moduleLoader from '../moduleLoader' // Mock memoize function from lodash @@ -80,7 +80,7 @@ describe('Testing modules/moduleLoader.ts in a jsdom environment', () => { const sampleResponse = `(function () {'use strict'; function index(_params) { return { }; } return index; })();` const correctUrl = moduleLoader.MODULES_STATIC_URL + `/bundles/${validModuleBundle}.js` const mockedXMLHttpRequest = mockXMLHttpRequest({ responseText: sampleResponse }) - const response = moduleLoader.memoizedGetModuleFile(validModuleBundle, 'bundle') + const response = moduleLoader.memoizedGetBundle(validModuleBundle) expect(mockedXMLHttpRequest.open).toHaveBeenCalledTimes(1) expect(mockedXMLHttpRequest.open).toHaveBeenCalledWith('GET', correctUrl, false) expect(mockedXMLHttpRequest.send).toHaveBeenCalledTimes(1) @@ -93,7 +93,7 @@ describe('Testing modules/moduleLoader.ts in a jsdom environment', () => { const sampleResponse = `(function (React) {});` const correctUrl = moduleLoader.MODULES_STATIC_URL + `/tabs/${validModuleTab}.js` const mockedXMLHttpRequest = mockXMLHttpRequest({ responseText: sampleResponse }) - const response = moduleLoader.memoizedGetModuleFile(validModuleTab, 'tab') + const response = moduleLoader.memoizedGetTab(validModuleTab) expect(mockedXMLHttpRequest.open).toHaveBeenCalledTimes(1) expect(mockedXMLHttpRequest.open).toHaveBeenCalledWith('GET', correctUrl, false) expect(mockedXMLHttpRequest.send).toHaveBeenCalledTimes(1) @@ -112,7 +112,8 @@ describe('Testing modules/moduleLoader.ts in a jsdom environment', () => { mockXMLHttpRequest({ responseText: sampleResponse }) const loadedBundle = moduleLoader.loadModuleBundle( 'module', - createEmptyContext(1, Variant.DEFAULT, []) + createEmptyContext(1, Variant.DEFAULT, []), + false ) expect(loadedBundle.make_empty_array()).toEqual([]) }) @@ -123,7 +124,7 @@ describe('Testing modules/moduleLoader.ts in a jsdom environment', () => { const wrongModuleText = `export function es6_function(params) {};` mockXMLHttpRequest({ responseText: wrongModuleText }) expect(() => - moduleLoader.loadModuleBundle('module', createEmptyContext(1, Variant.DEFAULT, [])) + moduleLoader.loadModuleBundle('module', createEmptyContext(1, Variant.DEFAULT, []), false) ).toThrow(ModuleInternalError) }) diff --git a/src/name-extractor/index.ts b/src/name-extractor/index.ts index 14656b8ae..51ae2d0c8 100644 --- a/src/name-extractor/index.ts +++ b/src/name-extractor/index.ts @@ -2,9 +2,9 @@ import * as es from 'estree' import { Context } from '../' import { UNKNOWN_LOCATION } from '../constants' -import { ModuleConnectionError, ModuleNotFoundError } from '../errors/moduleErrors' import { findAncestors, findIdentifierNode } from '../finder' -import { memoizedloadModuleDocs } from '../modules/moduleLoader' +import { ModuleConnectionError, ModuleNotFoundError } from '../modules/errors' +import { memoizedGetModuleDocs } from '../modules/moduleLoader' import syntaxBlacklist from '../parser/source/syntax' export interface NameDeclaration { @@ -19,7 +19,7 @@ const KIND_FUNCTION = 'func' const KIND_PARAM = 'param' const KIND_CONST = 'const' -function isImportDeclaration(node: es.Node): boolean { +function isImportDeclaration(node: es.Node): node is es.ImportDeclaration { return node.type === 'ImportDeclaration' } @@ -311,7 +311,7 @@ function getNames(node: es.Node, locTest: (node: es.Node) => boolean): NameDecla const specs = node.specifiers.filter(x => !isDummyName(x.local.name)) try { - const docs = memoizedloadModuleDocs(node.source.value as string, node) + const docs = memoizedGetModuleDocs(node.source.value as string, node) if (!docs) { return specs.map(spec => ({ diff --git a/src/runner/sourceRunner.ts b/src/runner/sourceRunner.ts index 3411e50af..35e1cd833 100644 --- a/src/runner/sourceRunner.ts +++ b/src/runner/sourceRunner.ts @@ -47,7 +47,12 @@ const DEFAULT_SOURCE_OPTIONS: IOptions = { originalMaxExecTime: 1000, useSubst: false, isPrelude: false, - throwInfiniteLoops: true + throwInfiniteLoops: true, + importOptions: { + loadTabs: true, + checkImports: true, + wrapModules: true + } } let previousCode: { @@ -104,7 +109,7 @@ function runSubstitution( } function runInterpreter(program: es.Program, context: Context, options: IOptions): Promise { - let it = evaluate(program, context, true, true) + let it = evaluate(program, context, options.importOptions) let scheduler: Scheduler if (context.variant === Variant.NON_DET) { it = nonDetEvaluate(program, context) @@ -148,6 +153,7 @@ async function runNative( } ;({ transpiled, sourceMapJson } = await transpile(transpiledProgram, context)) + // console.log(transpiled) let value = await sandboxedEval(transpiled, getRequireProvider(context), context.nativeStorage) if (context.variant === Variant.LAZY) { @@ -211,7 +217,7 @@ async function runECEvaluator( context: Context, options: IOptions ): Promise { - const value = await ECEvaluate(program, context) + const value = await ECEvaluate(program, context, options.importOptions) return ECEResultPromise(context, value) } diff --git a/src/stdlib/list.ts b/src/stdlib/list.ts index f646056a8..27ac2d43e 100644 --- a/src/stdlib/list.ts +++ b/src/stdlib/list.ts @@ -34,8 +34,8 @@ export function is_pair(x: any): x is Pair { // head returns the first component of the given pair, // throws an exception if the argument is not a pair // LOW-LEVEL FUNCTION, NOT SOURCE -export function head(xs: any): H { - if (is_pair(xs)) { +export function head>(xs: any): T[0] { + if (is_pair(xs)) { return xs[0] } else { throw new Error('head(xs) expects a pair as argument xs, but encountered ' + stringify(xs)) @@ -45,8 +45,8 @@ export function head(xs: any): H { // tail returns the second component of the given pair // throws an exception if the argument is not a pair // LOW-LEVEL FUNCTION, NOT SOURCE -export function tail(xs: any): T { - if (is_pair(xs)) { +export function tail>(xs: any): T[1] { + if (is_pair(xs)) { return xs[1] } else { throw new Error('tail(xs) expects a pair as argument xs, but encountered ' + stringify(xs)) @@ -129,7 +129,7 @@ export function set_tail(xs: any, x: any) { } } -export function accumulate(acc: (each: T, result: U) => any, init: U, xs: List): U { +export function accumulate(acc: (each: T, result: U) => U, init: U, xs: List): U { const recurser = (xs: List, result: U): U => { if (is_null(xs)) return result diff --git a/src/transpiler/__tests__/modules.ts b/src/transpiler/__tests__/modules.ts index e0d64bb11..5b40f52e8 100644 --- a/src/transpiler/__tests__/modules.ts +++ b/src/transpiler/__tests__/modules.ts @@ -38,13 +38,11 @@ test('Transform import declarations into variable declarations', async () => { ` const context = mockContext(Chapter.SOURCE_4) const program = parse(code, context)! - const [, importNodes] = await transformImportDeclarations( - program, - context, - new Set(), - false, - false - ) + const [, importNodes] = await transformImportDeclarations(program, context, new Set(), { + checkImports: false, + loadTabs: false, + wrapModules: false + }) expect(importNodes[0].type).toBe('VariableDeclaration') expect((importNodes[0].declarations[0].id as Identifier).name).toEqual('foo') @@ -67,8 +65,11 @@ test('Transpiler accounts for user variable names when transforming import state program, context, new Set(['__MODULE__', '__MODULE__0']), - false, - false + { + checkImports: false, + loadTabs: false, + wrapModules: false + } ) expect(importNodes[0].type).toBe('VariableDeclaration') @@ -123,3 +124,17 @@ test('Module loading functionality', async () => { expect((result as Value).value).toEqual('foo') }) + +test('importing undefined variables should throw errors', async () => { + const code = stripIndent` + import { hello } from 'one_module'; + ` + const context = mockContext(Chapter.SOURCE_4) + const program = parse(code, context)! + try { + await transpile(program, context, false) + } catch (error) { + expect(error).toBeInstanceOf(UndefinedImportError) + expect((error as UndefinedImportError).symbol).toEqual('hello') + } +}) diff --git a/src/transpiler/transpiler.ts b/src/transpiler/transpiler.ts index 7a9e70ade..2e165bd0b 100644 --- a/src/transpiler/transpiler.ts +++ b/src/transpiler/transpiler.ts @@ -10,6 +10,7 @@ import { memoizedGetModuleBundleAsync, memoizedGetModuleDocsAsync } from '../modules/moduleLoaderAsync' +import { ImportTransformOptions } from '../modules/moduleTypes' import { transformImportNodesAsync } from '../modules/utils' import { AllowedDeclarations, Chapter, Context, NativeStorage, Variant } from '../types' import * as create from '../utils/astCreator' @@ -46,9 +47,7 @@ export async function transformImportDeclarations( program: es.Program, context: Context | null, usedIdentifiers: Set, - checkImports: boolean, - loadTabs: boolean, - nativeId?: es.Identifier, + { checkImports, loadTabs, wrapModules }: ImportTransformOptions, useThis: boolean = false ): Promise<[string, es.VariableDeclaration[], es.Program['body']]> { const [importNodes, otherNodes] = partition( @@ -70,19 +69,19 @@ export async function transformImportDeclarations( return new Set(Object.keys(docs)) }, { - ImportSpecifier(specifier: es.ImportSpecifier, node, { namespaced }) { + ImportSpecifier(specifier: es.ImportSpecifier, { namespaced }) { return create.constantDeclaration( specifier.local.name, create.memberExpression(create.identifier(namespaced!), specifier.imported.name) ) }, - ImportDefaultSpecifier(specifier, node, { namespaced }) { + ImportDefaultSpecifier(specifier, { namespaced }) { return create.constantDeclaration( specifier.local.name, create.memberExpression(create.identifier(namespaced!), 'default') ) }, - ImportNamespaceSpecifier(specifier, node, { namespaced }) { + ImportNamespaceSpecifier(specifier, { namespaced }) { return create.constantDeclaration(specifier.local.name, create.identifier(namespaced!)) } }, @@ -102,8 +101,8 @@ export async function transformImportDeclarations( ) => { prefixes.push(`// ${moduleName} module`) - const modifiedText = nativeId - ? `${nativeId.name}.operators.get("wrapSourceModule")("${moduleName}", ${text}, ${REQUIRE_PROVIDER_ID})` + const modifiedText = wrapModules + ? `${NATIVE_STORAGE_ID}.operators.get("wrapSourceModule")("${moduleName}", ${text}, ${REQUIRE_PROVIDER_ID})` : `(${text})(${REQUIRE_PROVIDER_ID})` prefixes.push(`const ${namespaced} = ${modifiedText}\n`) @@ -112,41 +111,6 @@ export async function transformImportDeclarations( [[], []] as [string[], es.VariableDeclaration[]] ) - // const declNodes = Object.entries(moduleInfos).flatMap(([moduleName, { nodes, text, docs }]) => { - // const namespaced = getUniqueId(usedIdentifiers, '__MODULE__') - // prefix.push(`// ${moduleName} module`) - - // const modifiedText = nativeId - // ? `${nativeId.name}.operators.get("wrapSourceModule")("${moduleName}", ${text}, ${REQUIRE_PROVIDER_ID})` - // : `(${text})(${REQUIRE_PROVIDER_ID})` - // prefix.push(`const ${namespaced} = ${modifiedText}\n`) - - // return nodes.flatMap(node => - // node.specifiers.map(specifier => { - // if (specifier.type !== 'ImportSpecifier') { - // throw new Error(`Expected import specifier, found: ${specifier.type}`) - // } - - // if (checkImports) { - // if (!docs) { - // console.warn(`Failed to load docs for ${moduleName}, skipping typechecking`) - // } else if (!(specifier.imported.name in docs)) { - // throw new UndefinedImportError(specifier.imported.name, moduleName, node) - // } - // } - - // // Convert each import specifier to its corresponding local variable declaration - // return create.constantDeclaration( - // specifier.local.name, - // create.memberExpression( - // create.identifier(`${useThis ? 'this.' : ''}${namespaced}`), - // specifier.imported.name - // ) - // ) - // }) - // ) - // }) - return [prefix.join('\n'), declNodes, otherNodes] } @@ -658,9 +622,11 @@ async function transpileToSource( program, context, usedIdentifiers, - true, - true, - globalIds.native + { + checkImports: true, + loadTabs: true, + wrapModules: true + } ) program.body = (importNodes as es.Program['body']).concat(otherNodes) @@ -704,9 +670,11 @@ async function transpileToFullJS( program, context, usedIdentifiers, - false, - true, - wrapSourceModules ? globalIds.native : undefined + { + checkImports: false, + loadTabs: true, + wrapModules: false + } ) const transpiledProgram: es.Program = create.program([ diff --git a/src/typeChecker/typeErrorChecker.ts b/src/typeChecker/typeErrorChecker.ts index 9d627d594..1c018cc0b 100644 --- a/src/typeChecker/typeErrorChecker.ts +++ b/src/typeChecker/typeErrorChecker.ts @@ -2,7 +2,6 @@ import { parse as babelParse } from '@babel/parser' import * as es from 'estree' import { cloneDeep, isEqual } from 'lodash' -import { ModuleNotFoundError } from '../errors/moduleErrors' import { ConstNotAssignableTypeError, DuplicateTypeAliasError, @@ -21,6 +20,7 @@ import { TypeParameterNameNotAllowedError, UndefinedVariableTypeError } from '../errors/typeErrors' +import { ModuleNotFoundError } from '../modules/errors' import { memoizedGetModuleManifest } from '../modules/moduleLoader' import { BindableType, From d5f61a27ec3173038e3e2c969a0af2d48d364a46 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Wed, 3 May 2023 04:02:44 +0800 Subject: [PATCH 17/95] Introduce the import analyzer --- src/ec-evaluator/interpreter.ts | 2 +- src/errors/localImportErrors.ts | 41 ++ src/index.ts | 10 +- src/interpreter/interpreter.ts | 6 +- src/localImports/__tests__/preprocessor.ts | 24 +- src/localImports/analyzer.ts | 422 +++++++++++++++++ src/localImports/preprocessor.ts | 119 ++++- .../transformers/hoistAndMergeImports.ts | 91 ++++ src/modules/errors.ts | 15 +- src/modules/utils.ts | 6 +- src/parser/__tests__/scheme-encode-decode.ts | 7 +- src/parser/parser.ts | 2 +- src/repl/repl.ts | 2 +- src/runner/sourceRunner.ts | 4 +- src/transpiler/__tests__/modules.ts | 91 ++-- src/transpiler/transpiler.ts | 202 ++++---- src/transpiler/variableChecker.ts | 439 ++++++++++++++++++ src/utils/assert.ts | 5 + 18 files changed, 1309 insertions(+), 179 deletions(-) create mode 100644 src/localImports/analyzer.ts create mode 100644 src/transpiler/variableChecker.ts create mode 100644 src/utils/assert.ts diff --git a/src/ec-evaluator/interpreter.ts b/src/ec-evaluator/interpreter.ts index 201cf6057..2629a826e 100644 --- a/src/ec-evaluator/interpreter.ts +++ b/src/ec-evaluator/interpreter.ts @@ -9,6 +9,7 @@ import * as es from 'estree' import { partition, uniqueId } from 'lodash' +import { IOptions } from '..' import { UNKNOWN_LOCATION } from '../constants' import * as errors from '../errors/errors' import { RuntimeSourceError } from '../errors/runtimeSourceError' @@ -61,7 +62,6 @@ import { setVariable, Stack } from './utils' -import { IOptions } from '..' /** * The agenda is a list of commands that still needs to be executed by the machine. diff --git a/src/errors/localImportErrors.ts b/src/errors/localImportErrors.ts index 3d4a14b74..d461d92b2 100644 --- a/src/errors/localImportErrors.ts +++ b/src/errors/localImportErrors.ts @@ -1,3 +1,12 @@ +import { + ExportSpecifier, + ImportDefaultSpecifier, + ImportNamespaceSpecifier, + ImportSpecifier, + ModuleDeclaration, + SourceLocation +} from 'estree' + import { UNKNOWN_LOCATION } from '../constants' import { nonAlphanumericCharEncoding } from '../localImports/filePaths' import { ErrorSeverity, ErrorType, SourceError } from '../types' @@ -74,3 +83,35 @@ export class CircularImportError implements SourceError { return 'Break the circular import cycle by removing imports from any of the offending files.' } } + +export class ReexportSymbolError implements SourceError { + public severity = ErrorSeverity.ERROR + public type = ErrorType.RUNTIME + public readonly location: SourceLocation + private readonly sourceString: string + + constructor( + public readonly modulePath: string, + public readonly symbol: string, + public readonly nodes: ( + | ImportSpecifier + | ImportDefaultSpecifier + | ImportNamespaceSpecifier + | ExportSpecifier + | ModuleDeclaration + )[] + ) { + this.location = nodes[0].loc ?? UNKNOWN_LOCATION + this.sourceString = nodes + .map(({ loc }) => `(${loc!.start.line}:${loc!.start.column})`) + .join(', ') + } + + public explain(): string { + return `Multiple export definitions for the symbol '${this.symbol}' at (${this.sourceString})` + } + + public elaborate(): string { + return 'Check that you are not exporting the same symbol more than once' + } +} diff --git a/src/index.ts b/src/index.ts index e8a364e8b..97e0b60e9 100644 --- a/src/index.ts +++ b/src/index.ts @@ -34,6 +34,7 @@ import preprocessFileImports from './localImports/preprocessor' import { ImportTransformOptions } from './modules/moduleTypes' import { getKeywords, getProgramNames, NameDeclaration } from './name-extractor' import { parse } from './parser/parser' +import { decodeError, decodeValue } from './parser/scheme' import { parseWithComments } from './parser/utils' import { fullJSRunner, @@ -44,7 +45,6 @@ import { } from './runner' import { typeCheck } from './typeChecker/typeChecker' import { typeToString } from './utils/stringify' -import { decodeError, decodeValue } from './parser/scheme' export interface IOptions { scheduler: 'preemptive' | 'async' @@ -401,19 +401,19 @@ export function compile( code: string, context: Context, vmInternalFunctions?: string[] -): SVMProgram | undefined { +): Promise { const defaultFilePath = '/default.js' const files: Partial> = {} files[defaultFilePath] = code return compileFiles(files, defaultFilePath, context, vmInternalFunctions) } -export function compileFiles( +export async function compileFiles( files: Partial>, entrypointFilePath: string, context: Context, vmInternalFunctions?: string[] -): SVMProgram | undefined { +): Promise { for (const filePath in files) { const filePathError = validateFilePath(filePath) if (filePathError !== null) { @@ -428,7 +428,7 @@ export function compileFiles( return undefined } - const preprocessedProgram = preprocessFileImports(files, entrypointFilePath, context) + const preprocessedProgram = await preprocessFileImports(files, entrypointFilePath, context) if (!preprocessedProgram) { return undefined } diff --git a/src/interpreter/interpreter.ts b/src/interpreter/interpreter.ts index 4406ef556..7eeb2da9b 100644 --- a/src/interpreter/interpreter.ts +++ b/src/interpreter/interpreter.ts @@ -755,7 +755,7 @@ export function* evaluateProgram( switch (spec.type) { case 'ImportSpecifier': { if (checkImports && !(spec.imported.name in functions)) { - throw new UndefinedImportError(spec.imported.name, moduleName, node) + throw new UndefinedImportError(spec.imported.name, moduleName, spec) } defineVariable(context, spec.local.name, functions[spec.imported.name], true) @@ -763,7 +763,7 @@ export function* evaluateProgram( } case 'ImportDefaultSpecifier': { if (checkImports && !('default' in functions)) { - throw new UndefinedDefaultImportError(moduleName, node) + throw new UndefinedDefaultImportError(moduleName, spec) } defineVariable(context, spec.local.name, functions['default'], true) @@ -771,7 +771,7 @@ export function* evaluateProgram( } case 'ImportNamespaceSpecifier': { if (checkImports && funcCount === 0) { - throw new UndefinedNamespaceImportError(moduleName, node) + throw new UndefinedNamespaceImportError(moduleName, spec) } defineVariable(context, spec.local.name, functions, true) diff --git a/src/localImports/__tests__/preprocessor.ts b/src/localImports/__tests__/preprocessor.ts index e2631324e..685850345 100644 --- a/src/localImports/__tests__/preprocessor.ts +++ b/src/localImports/__tests__/preprocessor.ts @@ -104,15 +104,15 @@ describe('preprocessFileImports', () => { expect(stripLocationInfo(actualProgram)).toEqual(stripLocationInfo(expectedProgram)) } - it('returns undefined if the entrypoint file does not exist', () => { + it('returns undefined if the entrypoint file does not exist', async () => { const files: Record = { '/a.js': '1 + 2;' } - const actualProgram = preprocessFileImports(files, '/non-existent-file.js', actualContext) + const actualProgram = await preprocessFileImports(files, '/non-existent-file.js', actualContext) expect(actualProgram).toBeUndefined() }) - it('returns the same AST if the entrypoint file does not contain import/export statements', () => { + it('returns the same AST if the entrypoint file does not contain import/export statements', async () => { const files: Record = { '/a.js': ` function square(x) { @@ -122,11 +122,11 @@ describe('preprocessFileImports', () => { ` } const expectedCode = files['/a.js'] - const actualProgram = preprocessFileImports(files, '/a.js', actualContext) + const actualProgram = await preprocessFileImports(files, '/a.js', actualContext) assertASTsAreEquivalent(actualProgram, expectedCode) }) - it('removes all export-related AST nodes', () => { + it('removes all export-related AST nodes', async () => { const files: Record = { '/a.js': ` export const x = 42; @@ -151,11 +151,11 @@ describe('preprocessFileImports', () => { return x * x * x; } ` - const actualProgram = preprocessFileImports(files, '/a.js', actualContext) + const actualProgram = await preprocessFileImports(files, '/a.js', actualContext) assertASTsAreEquivalent(actualProgram, expectedCode) }) - it('ignores Source module imports & removes all non-Source module import-related AST nodes in the preprocessed program', () => { + it('ignores Source module imports & removes all non-Source module import-related AST nodes in the preprocessed program', async () => { const files: Record = { '/a.js': ` import d, { a, b, c } from "source-module"; @@ -191,11 +191,11 @@ describe('preprocessFileImports', () => { const y = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "y"); const z = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "z"); ` - const actualProgram = preprocessFileImports(files, '/a.js', actualContext) + const actualProgram = await preprocessFileImports(files, '/a.js', actualContext) assertASTsAreEquivalent(actualProgram, expectedCode) }) - it('collates Source module imports at the start of the top-level environment of the preprocessed program', () => { + it('collates Source module imports at the start of the top-level environment of the preprocessed program', async () => { const files: Record = { '/a.js': ` import { b } from "./b.js"; @@ -243,7 +243,7 @@ describe('preprocessFileImports', () => { b; ` - const actualProgram = preprocessFileImports(files, '/a.js', actualContext) + const actualProgram = await preprocessFileImports(files, '/a.js', actualContext) assertASTsAreEquivalent(actualProgram, expectedCode) }) @@ -327,7 +327,7 @@ describe('preprocessFileImports', () => { `) }) - it('returns a preprocessed program with all imports', () => { + it('returns a preprocessed program with all imports', async () => { const files: Record = { '/a.js': ` import { a as x, b as y } from "./b.js"; @@ -392,7 +392,7 @@ describe('preprocessFileImports', () => { x + y; ` - const actualProgram = preprocessFileImports(files, '/a.js', actualContext) + const actualProgram = await preprocessFileImports(files, '/a.js', actualContext) assertASTsAreEquivalent(actualProgram, expectedCode) }) }) diff --git a/src/localImports/analyzer.ts b/src/localImports/analyzer.ts new file mode 100644 index 000000000..0845cc99b --- /dev/null +++ b/src/localImports/analyzer.ts @@ -0,0 +1,422 @@ +import type * as es from 'estree' +import * as pathlib from 'path' +import { Context } from '..' +import { + memoizedGetModuleBundleAsync, + memoizedGetModuleDocsAsync +} from '../modules/moduleLoaderAsync' +import { parse } from '../parser/parser' +import { isDeclaration } from './typeGuards' +import { + ModuleNotFoundError, + UndefinedDefaultImportError, + UndefinedImportError, + UndefinedNamespaceImportError +} from '../modules/errors' +import { CircularImportError, ReexportSymbolError } from '../errors/localImportErrors' +import assert from '../utils/assert' + +class ArrayMap { + constructor(private readonly map: Map = new Map()) {} + + public get(key: K) { + return this.map.get(key) + } + + public add(key: K, item: V) { + if (!this.map.has(key)) { + this.map.set(key, []) + } + this.map.get(key)!.push(item) + } + + public entries() { + return Array.from(this.map.entries()) + } + + public keys() { + return new Set(this.map.keys()) + } +} + +type LocalModuleInfo = { + type: 'local' + indegree: 0 + dependencies: Set + ast: es.Program +} + +export type ResolvedLocalModuleInfo = LocalModuleInfo & { + exports: Set +} + +type SourceModuleInfo = { + type: 'source' + exports: Set + text: string + indegree: 0 +} + +type ModuleInfo = LocalModuleInfo | SourceModuleInfo +export type ResolvedModuleInfo = ResolvedLocalModuleInfo | SourceModuleInfo +export type AnalysisResult = { + moduleInfos: Record + topoOrder: string[] +} + +const isSourceImport = (path: string) => !path.startsWith('.') && !path.startsWith('/') + +const analyzeImport = async ( + files: Partial>, + entrypointFilePath: string, + context: Context +) => { + function resolveModule( + desiredPath: string, + node: Exclude + ) { + const source = node.source?.value + if (typeof source !== 'string') { + throw new Error(`${node.type} should have a source of type string, got ${source}`) + } + + if (isSourceImport(source)) return source + + const modAbsPath = pathlib.resolve(desiredPath, '..', source) + if (files[modAbsPath] !== undefined) return modAbsPath + + throw new ModuleNotFoundError(modAbsPath, node) + } + + const moduleInfos: Record = {} + async function parseFile(desiredPath: string, currNode?: es.Node) { + if (desiredPath in moduleInfos) { + return + } + + if (isSourceImport(desiredPath)) { + const [bundleText, bundleDocs] = await Promise.all([ + memoizedGetModuleBundleAsync(desiredPath, currNode), + memoizedGetModuleDocsAsync(desiredPath, currNode) + ]) + + if (!bundleDocs) { + throw new Error() + } + + moduleInfos[desiredPath] = { + type: 'source', + text: bundleText, + exports: new Set(Object.keys(bundleDocs)), + indegree: 0 + } + } else { + const code = files[desiredPath]! + const program = parse(code, context, {}, true)! + + const dependencies = new Map() + + for (const node of program.body) { + switch (node.type) { + case 'ExportNamedDeclaration': { + if (!node.source) continue + } + case 'ExportAllDeclaration': + case 'ImportDeclaration': { + const modAbsPath = resolveModule(desiredPath, node) + if (modAbsPath === desiredPath) { + throw new CircularImportError([modAbsPath, desiredPath]) + } + + node.source!.value = modAbsPath + dependencies.set(modAbsPath, node) + break + } + } + } + + moduleInfos[desiredPath] = { + type: 'local', + indegree: 0, + dependencies: new Set(dependencies.keys()), + ast: program + } + + await Promise.all( + Array.from(dependencies.entries()).map(async ([dep, node]) => { + await parseFile(dep, node) + moduleInfos[dep].indegree++ + }) + ) + } + } + + await parseFile(entrypointFilePath) + return moduleInfos +} + +const findCycle = ( + moduleInfos: Record }> +) => { + // First, we pick any arbitrary node that is part of a cycle as our + // starting node. + const startingNodeInCycle = Object.keys(moduleInfos).find( + name => moduleInfos[name].indegree !== 0 + ) + // By the invariant stated above, it is impossible that the starting + // node cannot be found. The lack of a starting node implies that + // all nodes have an in-degree of 0 after running Kahn's algorithm. + // This in turn implies that Kahn's algorithm was able to find a + // valid topological ordering & that the graph contains no cycles. + assert(!!startingNodeInCycle, 'There are no cycles in this graph. This should never happen.') + + const cycle = [startingNodeInCycle] + // Then, we keep picking arbitrary nodes with non-zero in-degrees until + // we pick a node that has already been picked. + while (true) { + const currentNode = cycle[cycle.length - 1] + const { dependencies: neighbours } = moduleInfos[currentNode] + assert( + neighbours !== undefined, + 'The keys of the adjacency list & the in-degree maps are not the same. This should never occur.' + ) + + // By the invariant stated above, it is impossible that any node + // on the cycle has an in-degree of 0 after running Kahn's algorithm. + // An in-degree of 0 implies that the node is not part of a cycle, + // which is a contradiction since the current node was picked because + // it is part of a cycle. + assert( + neighbours.size > 0, + `Node '${currentNode}' has no incoming edges. This should never happen.` + ) + + const nextNodeInCycle = Array.from(neighbours).find( + neighbour => moduleInfos[neighbour].indegree !== 0 + ) + + // By the invariant stated above, if the current node is part of a cycle, + // then one of its neighbours must also be part of the same cycle. This + // is because a cycle contains at least 2 nodes. + assert( + !!nextNodeInCycle, + `None of the neighbours of node '${currentNode}' are part of the same cycle. This should never happen.` + ) + + // If the next node we pick is already part of the cycle, + // we drop all elements before the first instance of the + // next node and return the cycle. + const nextNodeIndex = cycle.indexOf(nextNodeInCycle) + const isNodeAlreadyInCycle = nextNodeIndex !== -1 + cycle.push(nextNodeInCycle) + if (isNodeAlreadyInCycle) { + return cycle.slice(nextNodeIndex) + } + } +} + +const getTopologicalOrder = (moduleInfos: Record) => { + const zeroDegrees = Object.entries(moduleInfos) + .filter(([, { indegree }]) => indegree === 0) + .map(([name]) => name) + const dependencyMap = new Map>() + + for (const [name, info] of Object.entries(moduleInfos)) { + if (info.type === 'local') { + dependencyMap.set(name, info.dependencies) + } + } + + const moduleCount = Object.keys(moduleInfos).length + const topoOrder = [...zeroDegrees] + + console.log(moduleInfos) + + for (let i = 0; i < moduleCount; i++) { + if (zeroDegrees.length === 0) { + const localModuleInfos = Object.entries(moduleInfos).reduce((res, [name, modInfo]) => { + if (modInfo.type === 'source') return res + return { + ...res, + [name]: { + indegree: modInfo.indegree, + dependencies: modInfo.dependencies + } + } + }, {} as Record }>) + + const cycle = findCycle(localModuleInfos) + throw new CircularImportError(cycle) + } + + const node = zeroDegrees.pop()! + const info = moduleInfos[node] + if (info.type === 'source') continue + const dependencies = dependencyMap.get(node)! + + if (!dependencies || dependencies.size === 0) { + continue + } + + for (const neighbour of dependencies.keys()) { + const neighbourInfo = moduleInfos[neighbour] + neighbourInfo.indegree-- + if (neighbourInfo.indegree === 0) { + zeroDegrees.push(neighbour) + topoOrder.unshift(neighbour) + } + } + } + return topoOrder +} + +const validateDefaultImport = ( + spec: es.ImportDefaultSpecifier | es.ExportSpecifier | es.ImportSpecifier, + sourcePath: string, + modExported: Set +) => { + if (!modExported.has('default')) { + throw new UndefinedDefaultImportError(sourcePath, spec) + } +} + +const validateImport = ( + spec: es.ImportSpecifier | es.ExportSpecifier, + sourcePath: string, + modExported: Set +) => { + const symbol = spec.type === 'ImportSpecifier' ? spec.imported.name : spec.local.name + if (symbol === 'default') { + validateDefaultImport(spec, sourcePath, modExported) + } else if (!modExported.has(symbol)) { + throw new UndefinedImportError(symbol, sourcePath, spec) + } +} + +const validateNamespaceImport = ( + spec: es.ImportNamespaceSpecifier | es.ExportAllDeclaration, + sourcePath: string, + modExported: Set +) => { + if (modExported.size === 0) { + throw new UndefinedNamespaceImportError(sourcePath, spec) + } +} + +const validateImportAndExports = ( + moduleInfos: Record, + topoOrder: string[], + allowUndefinedImports: boolean +) => { + const resolvedModuleInfos: Record = {} + + topoOrder.forEach(name => { + const info = moduleInfos[name] + if (info.type === 'source') { + resolvedModuleInfos[name] = info + return + } + + const exportedSymbols = new ArrayMap< + string, + es.ImportSpecifier | es.ExportSpecifier | es.ModuleDeclaration + >() + info.ast.body.forEach(node => { + switch (node.type) { + case 'ImportDeclaration': { + if (!allowUndefinedImports) { + const { exports } = resolvedModuleInfos[node.source!.value as string] + node.specifiers.forEach(spec => { + switch (spec.type) { + case 'ImportSpecifier': { + validateImport(spec, name, exports) + break + } + case 'ImportDefaultSpecifier': { + validateDefaultImport(spec, name, exports) + break + } + case 'ImportNamespaceSpecifier': { + validateNamespaceImport(spec, name, exports) + break + } + } + }) + } + break + } + case 'ExportDefaultDeclaration': { + if (isDeclaration(node.declaration)) { + if (node.declaration.type === 'VariableDeclaration') { + throw new Error() + } + exportedSymbols.add('default', node) + } + break + } + case 'ExportNamedDeclaration': { + if (node.declaration) { + if (node.declaration.type === 'VariableDeclaration') { + } else { + exportedSymbols.add(node.declaration.id!.name, node) + } + } else if (node.source) { + const { exports } = resolvedModuleInfos[node.source!.value as string] + node.specifiers.forEach(spec => { + if (!allowUndefinedImports) { + validateImport(spec, name, exports) + } + + exportedSymbols.add(spec.exported.name, spec) + }) + } else { + node.specifiers.forEach(spec => exportedSymbols.add(spec.exported.name, spec)) + } + break + } + case 'ExportAllDeclaration': { + const { exports } = resolvedModuleInfos[node.source!.value as string] + if (!allowUndefinedImports) { + validateNamespaceImport(node, name, exports) + } + if (node.exported) { + exportedSymbols.add(node.exported.name, node) + } else { + for (const symbol of exports) { + exportedSymbols.add(symbol, node) + } + } + break + } + } + }) + + const exports = new Set( + exportedSymbols.entries().map(([symbol, nodes]) => { + if (nodes.length === 1) { + return symbol + } + + throw new ReexportSymbolError(name, symbol, nodes) + }) + ) + + resolvedModuleInfos[name] = { + ...info, + exports + } + }) + + return resolvedModuleInfos +} + +export default async function performImportAnalysis( + files: Partial>, + entrypointFilePath: string, + context: Context +): Promise { + const moduleInfos = await analyzeImport(files, entrypointFilePath, context) + const topoOrder = getTopologicalOrder(moduleInfos) + const resolvedInfos = validateImportAndExports(moduleInfos, topoOrder, false) + return { moduleInfos: resolvedInfos, topoOrder } +} diff --git a/src/localImports/preprocessor.ts b/src/localImports/preprocessor.ts index 37aad1ea7..5cbbe3a34 100644 --- a/src/localImports/preprocessor.ts +++ b/src/localImports/preprocessor.ts @@ -6,13 +6,14 @@ import { parse } from '../parser/parser' import { AcornOptions } from '../parser/types' import { Context } from '../types' import { isIdentifier } from '../utils/rttc' +import performImportAnalysis, { ResolvedLocalModuleInfo } from './analyzer' import { createInvokedFunctionResultVariableDeclaration } from './constructors/contextSpecificConstructors' import { DirectedGraph } from './directedGraph' import { transformFilePathToValidFunctionName, transformFunctionNameToInvokedFunctionResultVariableName } from './filePaths' -import { hoistAndMergeImports } from './transformers/hoistAndMergeImports' +import hoistAndMergeImports from './transformers/hoistAndMergeImports' import { removeExports } from './transformers/removeExports' import { isSourceModule, @@ -59,6 +60,116 @@ export const getImportedLocalModulePaths = ( return importedLocalModuleNames } +const newPreprocessor = async ( + files: Partial>, + entrypointFilePath: string, + context: Context +) => { + const { moduleInfos, topoOrder } = await performImportAnalysis(files, entrypointFilePath, context) + + // We want to operate on the entrypoint program to get the eventual + // preprocessed program. + const { ast: entrypointProgram } = moduleInfos[entrypointFilePath] as ResolvedLocalModuleInfo + const entrypointDirPath = path.resolve(entrypointFilePath, '..') + + // Create variables to hold the imported statements. + const entrypointProgramModuleDeclarations = entrypointProgram.body.filter(isModuleDeclaration) + const entrypointProgramInvokedFunctionResultVariableNameToImportSpecifiersMap = + getInvokedFunctionResultVariableNameToImportSpecifiersMap( + entrypointProgramModuleDeclarations, + entrypointDirPath + ) + const entrypointProgramAccessImportStatements = createAccessImportStatements( + entrypointProgramInvokedFunctionResultVariableNameToImportSpecifiersMap + ) + + // Transform all programs into their equivalent function declaration + // except for the entrypoint program. + const functionDeclarations: Record = {} + for (const [filePath, moduleInfo] of Object.entries(moduleInfos)) { + if (moduleInfo.type === 'source') continue + + // The entrypoint program does not need to be transformed into its + // function declaration equivalent as its enclosing environment is + // simply the overall program's (constructed program's) environment. + if (filePath === entrypointFilePath) { + continue + } + + const functionDeclaration = transformProgramToFunctionDeclaration(moduleInfo.ast, filePath) + const functionName = functionDeclaration.id?.name + if (functionName === undefined) { + throw new Error( + 'A transformed function declaration is missing its name. This should never happen.' + ) + } + + functionDeclarations[functionName] = functionDeclaration + } + + // Invoke each of the transformed functions and store the result in a variable. + const invokedFunctionResultVariableDeclarations: es.VariableDeclaration[] = [] + topoOrder.forEach((filePath: string): void => { + // As mentioned above, the entrypoint program does not have a function + // declaration equivalent, so there is no need to process it. + if (filePath === entrypointFilePath) { + return + } + + if (!filePath.startsWith('/')) return + + const functionName = transformFilePathToValidFunctionName(filePath) + const invokedFunctionResultVariableName = + transformFunctionNameToInvokedFunctionResultVariableName(functionName) + + const functionDeclaration = functionDeclarations[functionName] + const functionParams = functionDeclaration.params.filter(isIdentifier) + if (functionParams.length !== functionDeclaration.params.length) { + throw new Error( + 'Function declaration contains non-Identifier AST nodes as params. This should never happen.' + ) + } + + const invokedFunctionResultVariableDeclaration = createInvokedFunctionResultVariableDeclaration( + functionName, + invokedFunctionResultVariableName, + functionParams + ) + invokedFunctionResultVariableDeclarations.push(invokedFunctionResultVariableDeclaration) + }) + + // Re-assemble the program. + const preprocessedProgram: es.Program = { + ...entrypointProgram, + body: [ + // ...sourceModuleImports, + ...Object.values(functionDeclarations), + ...invokedFunctionResultVariableDeclarations, + ...entrypointProgramAccessImportStatements, + ...entrypointProgram.body + ] + } + + // After this pre-processing step, all export-related nodes in the AST + // are no longer needed and are thus removed. + removeExports(preprocessedProgram) + + // Finally, we need to hoist all remaining imports to the top of the + // program. These imports should be source module imports since + // non-Source module imports would have already been removed. As part + // of this step, we also merge imports from the same module so as to + // import each unique name per module only once. + + const programs = Object.values(moduleInfos) + .filter(({ type }) => type === 'local') + .map(({ ast }: ResolvedLocalModuleInfo) => ast) + const importNodes = hoistAndMergeImports(programs) + const removedImports = preprocessedProgram.body.filter(({ type }) => type !== 'ImportDeclaration') + preprocessedProgram.body = [...importNodes, ...removedImports] + // console.log(generate(preprocessedProgram)) + return preprocessedProgram +} + const parseProgramsAndConstructImportGraph = ( files: Partial>, entrypointFilePath: string, @@ -166,7 +277,7 @@ const getSourceModuleImports = (programs: Record): es.Import * @param entrypointFilePath The absolute path of the entrypoint file. * @param context The information associated with the program evaluation. */ -const preprocessFileImports = ( +export const preprocessFileImports = ( files: Partial>, entrypointFilePath: string, context: Context @@ -282,9 +393,9 @@ const preprocessFileImports = ( // non-Source module imports would have already been removed. As part // of this step, we also merge imports from the same module so as to // import each unique name per module only once. - hoistAndMergeImports(preprocessedProgram) + // hoistAndMergeImports(Object.(moduleInfos)) return preprocessedProgram } -export default preprocessFileImports +export default newPreprocessor diff --git a/src/localImports/transformers/hoistAndMergeImports.ts b/src/localImports/transformers/hoistAndMergeImports.ts index 96699587c..20002449a 100644 --- a/src/localImports/transformers/hoistAndMergeImports.ts +++ b/src/localImports/transformers/hoistAndMergeImports.ts @@ -4,6 +4,7 @@ import * as _ from 'lodash' import { createImportDeclaration, createLiteral } from '../constructors/baseConstructors' import { cloneAndStripImportSpecifier } from '../constructors/contextSpecificConstructors' import { isImportDeclaration } from '../typeGuards' +import { isSourceModule } from './removeNonSourceModuleImports' /** * Hoists import declarations to the top of the program & merges duplicate @@ -79,3 +80,93 @@ export const hoistAndMergeImports = (program: es.Program): void => { // Hoist the merged import declarations to the top of the program body. program.body = [...mergedImportDeclarations, ...nonImportDeclarations] } + +export default function hoistAndMergeImportsNew(programs: es.Program[]) { + const allNodes = programs.flatMap(({ body }) => body) + + const importNodes = allNodes.filter( + (node): node is es.ImportDeclaration => node.type === 'ImportDeclaration' + ) + const importsToSpecifiers = new Map>>() + for (const node of importNodes) { + const source = node.source!.value as string + // We no longer need imports from non-source modules, so we can just ignore them + if (!isSourceModule(source)) continue + + if (!importsToSpecifiers.has(source)) { + importsToSpecifiers.set(source, new Map()) + } + + const specifierMap = importsToSpecifiers.get(source)! + node.specifiers.forEach(spec => { + let importingName: string + switch (spec.type) { + case 'ImportSpecifier': { + importingName = spec.imported.name + break + } + case 'ImportDefaultSpecifier': { + importingName = 'default' + break + } + case 'ImportNamespaceSpecifier': { + // TODO handle + throw new Error() + } + } + + if (!specifierMap.has(importingName)) { + specifierMap.set(importingName, new Set()) + } + specifierMap.get(importingName)!.add(spec.local.name) + }) + } + + // Every distinct source module being imported is given its own ImportDeclaration node + const importDeclarations = Array.from(importsToSpecifiers.entries()).map( + ([moduleName, imports]) => { + // Across different modules, the user may choose to alias some of the declarations, so we keep track, + // of all the different aliases used for each unique imported symbol + const specifiers = Array.from(imports.entries()).flatMap(([importedName, aliases]) => { + if (importedName === 'default') { + return Array.from(aliases).map( + alias => + ({ + type: 'ImportDefaultSpecifier', + local: { + type: 'Identifier', + name: alias + } + } as es.ImportDefaultSpecifier) + ) as (es.ImportSpecifier | es.ImportDefaultSpecifier)[] + } else { + return Array.from(aliases).map( + alias => + ({ + type: 'ImportSpecifier', + imported: { + type: 'Identifier', + name: importedName + }, + local: { + type: 'Identifier', + name: alias + } + } as es.ImportSpecifier) + ) + } + }) + + const decl: es.ImportDeclaration = { + type: 'ImportDeclaration', + source: { + type: 'Literal', + value: moduleName + }, + specifiers + } + return decl + } + ) + return importDeclarations +} diff --git a/src/modules/errors.ts b/src/modules/errors.ts index da6447773..3a5b20dba 100644 --- a/src/modules/errors.ts +++ b/src/modules/errors.ts @@ -1,4 +1,11 @@ -import type { ExportAllDeclaration, ExportNamedDeclaration, ImportDeclaration, Node } from 'estree' +import type { + ExportAllDeclaration, + ExportSpecifier, + ImportDefaultSpecifier, + ImportNamespaceSpecifier, + ImportSpecifier, + Node +} from 'estree' import { RuntimeSourceError } from '../errors/runtimeSourceError' @@ -54,7 +61,7 @@ export class UndefinedImportError extends RuntimeSourceError { constructor( public readonly symbol: string, public readonly moduleName: string, - node?: ImportDeclaration | ExportNamedDeclaration | ExportAllDeclaration + node?: ImportSpecifier | ExportSpecifier ) { super(node) } @@ -71,7 +78,7 @@ export class UndefinedImportError extends RuntimeSourceError { export class UndefinedDefaultImportError extends RuntimeSourceError { constructor( public readonly moduleName: string, - node?: ImportDeclaration | ExportNamedDeclaration | ExportAllDeclaration + node?: ImportSpecifier | ImportDefaultSpecifier | ExportSpecifier ) { super(node) } @@ -87,7 +94,7 @@ export class UndefinedDefaultImportError extends RuntimeSourceError { export class UndefinedNamespaceImportError extends RuntimeSourceError { constructor( public readonly moduleName: string, - node?: ImportDeclaration | ExportNamedDeclaration | ExportAllDeclaration + node?: ImportNamespaceSpecifier | ExportAllDeclaration ) { super(node) } diff --git a/src/modules/utils.ts b/src/modules/utils.ts index 286486f37..f4366067a 100644 --- a/src/modules/utils.ts +++ b/src/modules/utils.ts @@ -216,17 +216,17 @@ export async function transformImportNodesAsync( switch (spec.type) { case 'ImportSpecifier': { if (!info.docs.has(spec.imported.name)) - throw new UndefinedImportError(spec.imported.name, moduleName, node) + throw new UndefinedImportError(spec.imported.name, moduleName, spec) break } case 'ImportDefaultSpecifier': { if (!info.docs.has('default')) - throw new UndefinedDefaultImportError(moduleName, node) + throw new UndefinedDefaultImportError(moduleName, spec) break } case 'ImportNamespaceSpecifier': { if (info.docs.size === 0) - throw new UndefinedNamespaceImportError(moduleName, node) + throw new UndefinedNamespaceImportError(moduleName, spec) break } } diff --git a/src/parser/__tests__/scheme-encode-decode.ts b/src/parser/__tests__/scheme-encode-decode.ts index 877690ce0..a458f0bac 100644 --- a/src/parser/__tests__/scheme-encode-decode.ts +++ b/src/parser/__tests__/scheme-encode-decode.ts @@ -1,8 +1,9 @@ -import { decodeError, decodeValue } from '../scheme' -import { encode, decode } from '../../scm-slang/src' -import { UnassignedVariable } from '../../errors/errors' import { Node } from 'estree' + +import { UnassignedVariable } from '../../errors/errors' +import { decode, encode } from '../../scm-slang/src' import { dummyExpression } from '../../utils/dummyAstCreator' +import { decodeError, decodeValue } from '../scheme' describe('Scheme encoder and decoder', () => { it('encodes and decodes strings correctly', () => { diff --git a/src/parser/parser.ts b/src/parser/parser.ts index 220950114..7d7602297 100644 --- a/src/parser/parser.ts +++ b/src/parser/parser.ts @@ -4,9 +4,9 @@ import { Context } from '..' import { Chapter, Variant } from '../types' import { FullJSParser } from './fullJS' import { FullTSParser } from './fullTS' +import { PythonParser } from './python' import { SchemeParser } from './scheme' import { SourceParser } from './source' -import { PythonParser } from './python' import { SourceTypedParser } from './source/typed' import { AcornOptions, Parser } from './types' diff --git a/src/repl/repl.ts b/src/repl/repl.ts index a448326d5..b3b4f7f47 100644 --- a/src/repl/repl.ts +++ b/src/repl/repl.ts @@ -2,7 +2,7 @@ import { start } from 'repl' // 'repl' here refers to the module named 'repl' in index.d.ts import { inspect } from 'util' -import { scmLanguages, sourceLanguages, pyLanguages } from '../constants' +import { pyLanguages, scmLanguages, sourceLanguages } from '../constants' import { createContext, IOptions, parseError, runInContext } from '../index' import Closure from '../interpreter/closure' import { ExecutionMethod, Variant } from '../types' diff --git a/src/runner/sourceRunner.ts b/src/runner/sourceRunner.ts index e71412a16..1c2e51357 100644 --- a/src/runner/sourceRunner.ts +++ b/src/runner/sourceRunner.ts @@ -153,7 +153,7 @@ async function runNative( } ;({ transpiled, sourceMapJson } = await transpile(transpiledProgram, context)) - // console.log(transpiled) + console.log(transpiled) let value = await sandboxedEval(transpiled, getRequireProvider(context), context.nativeStorage) if (context.variant === Variant.LAZY) { @@ -308,7 +308,7 @@ export async function sourceFilesRunner( context.shouldIncreaseEvaluationTimeout = _.isEqual(previousCode, currentCode) previousCode = currentCode - const preprocessedProgram = preprocessFileImports(files, entrypointFilePath, context) + const preprocessedProgram = await preprocessFileImports(files, entrypointFilePath, context) if (!preprocessedProgram) { return resolvedErrorPromise } diff --git a/src/transpiler/__tests__/modules.ts b/src/transpiler/__tests__/modules.ts index 9be272376..d31ec4d5a 100644 --- a/src/transpiler/__tests__/modules.ts +++ b/src/transpiler/__tests__/modules.ts @@ -1,6 +1,6 @@ import type { Identifier, Literal, MemberExpression, VariableDeclaration } from 'estree' -import type { FunctionLike, MockedFunction } from 'jest-mock' +// import type { FunctionLike, MockedFunction } from 'jest-mock' import { runInContext } from '../..' import { mockContext } from '../../mocks/context' import { UndefinedImportError } from '../../modules/errors' @@ -10,34 +10,43 @@ import { Chapter, Value } from '../../types' import { stripIndent } from '../../utils/formatters' import { transformImportDeclarations, transpile } from '../transpiler' -jest.mock('../../modules/moduleLoader', () => ({ - ...jest.requireActual('../../modules/moduleLoader'), - memoizedGetModuleFile: jest.fn(), - memoizedGetModuleManifest: jest.fn().mockReturnValue({ - one_module: { - tabs: [] - }, - another_module: { - tabs: [] - } - }), - memoizedloadModuleDocs: jest.fn().mockReturnValue({ - foo: 'foo', - bar: 'bar' - }) -})) +// jest.mock('../../modules/moduleLoaderAsync', () => ({ +// ...jest.requireActual('../../modules/moduleLoaderAsync'), +// memoizedGetModuleFile: jest.fn(), +// memoizedGetModuleManifest: jest.fn().mockReturnValue({ +// one_module: { +// tabs: [] +// }, +// another_module: { +// tabs: [] +// } +// }), +// memoizedloadModuleDocs: jest.fn().mockReturnValue({ +// foo: 'foo', +// bar: 'bar' +// }) +// })) +jest.spyOn(moduleLoader, 'memoizedGetModuleManifestAsync').mockResolvedValue({ + one_module: { tabs: ['tab0'] }, + another_module: { tabs: [] } +}) -const asMock = (func: T) => func as MockedFunction -const mockedModuleFile = asMock(memoizedGetModuleFile) +jest.spyOn(moduleLoader, 'memoizedGetModuleDocsAsync').mockResolvedValue({ + foo: 'foo', + bar: 'bar' +}) + +// const asMock = (func: T) => func as MockedFunction +// const mockedModuleFile = asMock(memoizedGetModuleFile) test('Transform import declarations into variable declarations', async () => { - mockedModuleFile.mockImplementation((name, type) => { - if (type === 'json') { - return name === 'one_module' ? "{ foo: 'foo' }" : "{ bar: 'bar' }" - } else { - return 'undefined' - } - }) + // mockedModuleFile.mockImplementation((name, type) => { + // if (type === 'json') { + // return name === 'one_module' ? "{ foo: 'foo' }" : "{ bar: 'bar' }" + // } else { + // return 'undefined' + // } + // }) const code = stripIndent` import { foo } from "test/one_module"; @@ -49,7 +58,7 @@ test('Transform import declarations into variable declarations', async () => { const [, importNodes] = await transformImportDeclarations(program, context, new Set(), { checkImports: true, wrapModules: true, - loadTabs: false, + loadTabs: false }) expect(importNodes[0].type).toBe('VariableDeclaration') @@ -60,13 +69,13 @@ test('Transform import declarations into variable declarations', async () => { }) test('Transpiler accounts for user variable names when transforming import statements', async () => { - mockedModuleFile.mockImplementation((name, type) => { - if (type === 'json') { - return name === 'one_module' ? "{ foo: 'foo' }" : "{ bar: 'bar' }" - } else { - return 'undefined' - } - }) + // mockedModuleFile.mockImplementation((name, type) => { + // if (type === 'json') { + // return name === 'one_module' ? "{ foo: 'foo' }" : "{ bar: 'bar' }" + // } else { + // return 'undefined' + // } + // }) const code = stripIndent` import { foo } from "test/one_module"; @@ -156,13 +165,13 @@ test('importing undefined variables should throw errors', async () => { }) test('importing undefined variables should throw errors', () => { - mockedModuleFile.mockImplementation((name, type) => { - if (type === 'json') { - return '{}' - } else { - return 'undefined' - } - }) + // mockedModuleFile.mockImplementation((name, type) => { + // if (type === 'json') { + // return '{}' + // } else { + // return 'undefined' + // } + // }) const code = stripIndent` import { hello } from 'one_module'; diff --git a/src/transpiler/transpiler.ts b/src/transpiler/transpiler.ts index d81aa22ac..c6da25b51 100644 --- a/src/transpiler/transpiler.ts +++ b/src/transpiler/transpiler.ts @@ -5,7 +5,6 @@ import { partition } from 'lodash' import { RawSourceMap, SourceMapGenerator } from 'source-map' import { NATIVE_STORAGE_ID, REQUIRE_PROVIDER_ID, UNKNOWN_LOCATION } from '../constants' -import { UndefinedVariable } from '../errors/errors' import { memoizedGetModuleBundleAsync, memoizedGetModuleDocsAsync @@ -19,7 +18,8 @@ import { getIdentifiersInProgram, getUniqueId } from '../utils/uniqueIds' -import { ancestor, simple } from '../utils/walkers' +import { simple } from '../utils/walkers' +import checkForUndefinedVariables from './variableChecker' /** * This whole transpiler includes many many many many hacks to get stuff working. @@ -317,99 +317,99 @@ function transformCallExpressionsToCheckIfFunction(program: es.Program, globalId }) } -export function checkForUndefinedVariables( - program: es.Program, - nativeStorage: NativeStorage, - globalIds: NativeIds, - skipUndefined: boolean -) { - const builtins = nativeStorage.builtins - const identifiersIntroducedByNode = new Map>() - function processBlock(node: es.Program | es.BlockStatement) { - const identifiers = new Set() - for (const statement of node.body) { - if (statement.type === 'VariableDeclaration') { - identifiers.add((statement.declarations[0].id as es.Identifier).name) - } else if (statement.type === 'FunctionDeclaration') { - if (statement.id === null) { - throw new Error( - 'Encountered a FunctionDeclaration node without an identifier. This should have been caught when parsing.' - ) - } - identifiers.add(statement.id.name) - } else if (statement.type === 'ImportDeclaration') { - for (const specifier of statement.specifiers) { - identifiers.add(specifier.local.name) - } - } - } - identifiersIntroducedByNode.set(node, identifiers) - } - function processFunction( - node: es.FunctionDeclaration | es.ArrowFunctionExpression, - _ancestors: es.Node[] - ) { - identifiersIntroducedByNode.set( - node, - new Set( - node.params.map(id => - id.type === 'Identifier' - ? id.name - : ((id as es.RestElement).argument as es.Identifier).name - ) - ) - ) - } - const identifiersToAncestors = new Map() - ancestor(program, { - Program: processBlock, - BlockStatement: processBlock, - FunctionDeclaration: processFunction, - ArrowFunctionExpression: processFunction, - ForStatement(forStatement: es.ForStatement, ancestors: es.Node[]) { - const init = forStatement.init! - if (init.type === 'VariableDeclaration') { - identifiersIntroducedByNode.set( - forStatement, - new Set([(init.declarations[0].id as es.Identifier).name]) - ) - } - }, - Identifier(identifier: es.Identifier, ancestors: es.Node[]) { - identifiersToAncestors.set(identifier, [...ancestors]) - }, - Pattern(node: es.Pattern, ancestors: es.Node[]) { - if (node.type === 'Identifier') { - identifiersToAncestors.set(node, [...ancestors]) - } else if (node.type === 'MemberExpression') { - if (node.object.type === 'Identifier') { - identifiersToAncestors.set(node.object, [...ancestors]) - } - } - } - }) - const nativeInternalNames = new Set(Object.values(globalIds).map(({ name }) => name)) - - for (const [identifier, ancestors] of identifiersToAncestors) { - const name = identifier.name - const isCurrentlyDeclared = ancestors.some(a => identifiersIntroducedByNode.get(a)?.has(name)) - if (isCurrentlyDeclared) { - continue - } - const isPreviouslyDeclared = nativeStorage.previousProgramsIdentifiers.has(name) - if (isPreviouslyDeclared) { - continue - } - const isBuiltin = builtins.has(name) - if (isBuiltin) { - continue - } - const isNativeId = nativeInternalNames.has(name) - if (!isNativeId && !skipUndefined) { - throw new UndefinedVariable(name, identifier) - } - } -} +// export function checkForUndefinedVariables( +// program: es.Program, +// nativeStorage: NativeStorage, +// globalIds: NativeIds, +// skipUndefined: boolean +// ) { +// const builtins = nativeStorage.builtins +// const identifiersIntroducedByNode = new Map>() +// function processBlock(node: es.Program | es.BlockStatement) { +// const identifiers = new Set() +// for (const statement of node.body) { +// if (statement.type === 'VariableDeclaration') { +// identifiers.add((statement.declarations[0].id as es.Identifier).name) +// } else if (statement.type === 'FunctionDeclaration') { +// if (statement.id === null) { +// throw new Error( +// 'Encountered a FunctionDeclaration node without an identifier. This should have been caught when parsing.' +// ) +// } +// identifiers.add(statement.id.name) +// } else if (statement.type === 'ImportDeclaration') { +// for (const specifier of statement.specifiers) { +// identifiers.add(specifier.local.name) +// } +// } +// } +// identifiersIntroducedByNode.set(node, identifiers) +// } +// function processFunction( +// node: es.FunctionDeclaration | es.ArrowFunctionExpression, +// _ancestors: es.Node[] +// ) { +// identifiersIntroducedByNode.set( +// node, +// new Set( +// node.params.map(id => +// id.type === 'Identifier' +// ? id.name +// : ((id as es.RestElement).argument as es.Identifier).name +// ) +// ) +// ) +// } +// const identifiersToAncestors = new Map() +// ancestor(program, { +// Program: processBlock, +// BlockStatement: processBlock, +// FunctionDeclaration: processFunction, +// ArrowFunctionExpression: processFunction, +// ForStatement(forStatement: es.ForStatement, ancestors: es.Node[]) { +// const init = forStatement.init! +// if (init.type === 'VariableDeclaration') { +// identifiersIntroducedByNode.set( +// forStatement, +// new Set([(init.declarations[0].id as es.Identifier).name]) +// ) +// } +// }, +// Identifier(identifier: es.Identifier, ancestors: es.Node[]) { +// identifiersToAncestors.set(identifier, [...ancestors]) +// }, +// Pattern(node: es.Pattern, ancestors: es.Node[]) { +// if (node.type === 'Identifier') { +// identifiersToAncestors.set(node, [...ancestors]) +// } else if (node.type === 'MemberExpression') { +// if (node.object.type === 'Identifier') { +// identifiersToAncestors.set(node.object, [...ancestors]) +// } +// } +// } +// }) +// const nativeInternalNames = new Set(Object.values(globalIds).map(({ name }) => name)) + +// for (const [identifier, ancestors] of identifiersToAncestors) { +// const name = identifier.name +// const isCurrentlyDeclared = ancestors.some(a => identifiersIntroducedByNode.get(a)?.has(name)) +// if (isCurrentlyDeclared) { +// continue +// } +// const isPreviouslyDeclared = nativeStorage.previousProgramsIdentifiers.has(name) +// if (isPreviouslyDeclared) { +// continue +// } +// const isBuiltin = builtins.has(name) +// if (isBuiltin) { +// continue +// } +// const isNativeId = nativeInternalNames.has(name) +// if (!isNativeId && !skipUndefined) { +// throw new UndefinedVariable(name, identifier) +// } +// } +// } function transformSomeExpressionsToCheckIfBoolean(program: es.Program, globalIds: NativeIds) { function transform( @@ -613,7 +613,9 @@ async function transpileToSource( transformSomeExpressionsToCheckIfBoolean(program, globalIds) transformPropertyAssignment(program, globalIds) transformPropertyAccess(program, globalIds) - checkForUndefinedVariables(program, context.nativeStorage, globalIds, skipUndefined) + if (!skipUndefined) { + checkForUndefinedVariables(program, usedIdentifiers) + } transformFunctionDeclarationsToArrowFunctions(program, functionsToStringMap) wrapArrowFunctionsToAllowNormalCallsAndNiceToString(program, functionsToStringMap, globalIds) addInfiniteLoopProtection(program, globalIds, usedIdentifiers) @@ -664,7 +666,9 @@ async function transpileToFullJS( ]) const globalIds = getNativeIds(program, usedIdentifiers) - checkForUndefinedVariables(program, context.nativeStorage, globalIds, skipUndefined) + Object.keys(globalIds).forEach(usedIdentifiers.add) + + if (!skipUndefined) checkForUndefinedVariables(program, usedIdentifiers) const [modulePrefix, importNodes, otherNodes] = await transformImportDeclarations( program, @@ -695,9 +699,9 @@ export function transpile( program: es.Program, context: Context, skipUndefined = false -): TranspiledResult { +): Promise { if (context.chapter === Chapter.FULL_JS || context.chapter === Chapter.PYTHON_1) { - return transpileToFullJS(program, context, true) + return transpileToFullJS(program, context, true, true) } else if (context.variant == Variant.NATIVE) { return transpileToFullJS(program, context, false, false) } else { diff --git a/src/transpiler/variableChecker.ts b/src/transpiler/variableChecker.ts new file mode 100644 index 000000000..c29170858 --- /dev/null +++ b/src/transpiler/variableChecker.ts @@ -0,0 +1,439 @@ +import type * as es from 'estree' + +import { UndefinedVariable } from '../errors/errors' +import assert from '../utils/assert' +import { recursive } from '../utils/walkers' + +function isDeclaration(node: es.Node): node is es.Declaration { + return ( + node.type === 'ClassDeclaration' || + node.type === 'FunctionDeclaration' || + node.type === 'VariableDeclaration' + ) +} + +function isModuleDeclaration(node: es.Node): node is es.ModuleDeclaration { + return [ + 'ExportAllDeclaration', + 'ExportNamedDeclaration', + 'ExportDefaultDeclaration', + 'ImportDeclaration' + ].includes(node.type) +} + +function isModuleOrRegDeclaration(node: es.Node): node is es.ModuleDeclaration | es.Declaration { + return isDeclaration(node) || isModuleDeclaration(node) +} + +function isPattern(node: es.Node): node is es.Pattern { + return [ + 'ArrayPattern', + 'AssignmentPattern', + 'Identifier', + 'MemberExpression', + 'ObjectPattern', + 'RestElement' + ].includes(node.type) +} + +function isFunctionNode( + node: es.Node +): node is es.ArrowFunctionExpression | es.FunctionDeclaration | es.FunctionExpression { + return ['ArrowFunctionExpression', 'FunctionExpression', 'FunctionDeclaration'].includes( + node.type + ) +} + +function extractIdsFromPattern(pattern: es.Pattern): Set { + const ids = new Set() + recursive(pattern, null, { + ArrayPattern: ({ elements }: es.ArrayPattern, _state, c) => + elements.forEach(elem => { + if (elem) c(elem, null) + }), + AssignmentPattern: (p: es.AssignmentPattern, _state, c) => { + c(p.left, null) + c(p.right, null) + }, + Identifier: (id: es.Identifier) => ids.add(id), + MemberExpression: () => { + throw new Error('MemberExpressions should not be used with extractIdsFromPattern') + }, + ObjectPattern: ({ properties }: es.ObjectPattern, _state, c) => + properties.forEach(prop => c(prop, null)), + RestElement: ({ argument }: es.RestElement, _state, c) => c(argument, null) + }) + return ids +} + +function checkPattern(pattern: es.Pattern, identifiers: Set): void { + extractIdsFromPattern(pattern).forEach(id => { + if (!identifiers.has(id.name)) throw new UndefinedVariable(id.name, id) + }) +} + +/** + * Check a function node for undefined variables. The name of the function should be included in the `identifiers` set + * passed in. + */ +function checkFunction( + input: es.ArrowFunctionExpression | es.FunctionDeclaration | es.FunctionExpression, + identifiers: Set +): void { + // Add the names of the parameters for each function into the set + // of identifiers that should be checked against + const newIdentifiers = new Set(identifiers) + input.params.forEach(pattern => + extractIdsFromPattern(pattern).forEach(({ name }) => newIdentifiers.add(name)) + ) + + if (input.body.type === 'BlockStatement') { + checkForUndefinedVariables(input.body, newIdentifiers) + } else checkExpression(input.body, newIdentifiers) +} + +function checkExpression( + node: es.Expression | es.RestElement | es.SpreadElement | es.Property, + identifiers: Set +): void { + const checkMultiple = (items: (typeof node | null)[]) => + items.forEach(item => { + if (item) checkExpression(item, identifiers) + }) + + switch (node.type) { + case 'ArrayExpression': { + checkMultiple(node.elements) + break + } + case 'ArrowFunctionExpression': + case 'FunctionExpression': { + checkFunction(node, identifiers) + break + } + case 'ClassExpression': { + checkClass(node, identifiers) + break + } + case 'AssignmentExpression': + case 'BinaryExpression': + case 'LogicalExpression': { + checkExpression(node.right, identifiers) + if (isPattern(node.left)) { + checkPattern(node.left, identifiers) + } else { + checkExpression(node.left, identifiers) + } + break + } + case 'MemberExpression': { + // TODO handle super + checkExpression(node.object as es.Expression, identifiers) + if (node.computed) checkExpression(node.property as es.Expression, identifiers) + break + } + case 'CallExpression': + case 'NewExpression': { + // TODO handle super + checkExpression(node.callee as es.Expression, identifiers) + checkMultiple(node.arguments) + break + } + case 'ConditionalExpression': { + checkMultiple([node.alternate, node.consequent, node.test]) + break + } + case 'Identifier': { + if (!identifiers.has(node.name)) { + throw new UndefinedVariable(node.name, node) + } + break + } + case 'ImportExpression': { + checkExpression(node.source, identifiers) + break + } + case 'ObjectExpression': { + checkMultiple(node.properties) + break + } + case 'Property': { + if (isPattern(node.value)) checkPattern(node.value, identifiers) + else checkExpression(node.value, identifiers) + break + } + case 'SpreadElement': + case 'RestElement': { + if (isPattern(node.argument)) { + checkPattern(node.argument, identifiers) + break + } + // Case falls through! + } + case 'AwaitExpression': + case 'UnaryExpression': + case 'UpdateExpression': + case 'YieldExpression': { + if (node.argument) checkExpression(node.argument as es.Expression, identifiers) + break + } + case 'TaggedTemplateExpression': { + checkExpression(node.tag, identifiers) + checkExpression(node.quasi, identifiers) + break + } + case 'SequenceExpression': // Comma operator + case 'TemplateLiteral': { + checkMultiple(node.expressions) + break + } + } +} + +/** + * Check that a variable declaration is initialized with defined variables + * Returns false if there are undefined variables, returns the set of identifiers introduced by the + * declaration otherwise + */ +function checkVariableDeclaration( + node: es.VariableDeclaration, + identifiers: Set +): Set { + const output = new Set() + node.declarations.forEach(({ id, init }) => { + if (init) { + if (isFunctionNode(init)) { + assert( + id.type == 'Identifier', + 'VariableDeclaration for function expressions should be Identifiers' + ) + // Add the name of the function to the set of identifiers so that + // recursive calls are possible + const localIdentifiers = new Set([...identifiers, id.name]) + checkFunction(init, localIdentifiers) + } else if (init.type === 'ClassExpression') { + assert( + id.type == 'Identifier', + 'VariableDeclaration for class expressions should be Identifiers' + ) + const localIdentifiers = new Set([...identifiers, id.name]) + checkClass(init, localIdentifiers) + } else { + checkExpression(init, identifiers) + } + } + extractIdsFromPattern(id).forEach(({ name }) => output.add(name)) + }) + return output +} + +function checkClass(node: es.ClassDeclaration | es.ClassExpression, localIdentifiers: Set) { + node.body.body.forEach(item => { + if (item.type === 'StaticBlock') { + checkForUndefinedVariables(item, localIdentifiers) + return + } + + if (item.computed) { + assert( + item.key.type !== 'PrivateIdentifier', + 'Computed property should not have PrivateIdentifier key type' + ) + checkExpression(item.key, localIdentifiers) + } + + if (item.type === 'MethodDefinition') { + checkFunction(item.value, localIdentifiers) + } else if (item.value) { + checkExpression(item.value, localIdentifiers) + } + }) +} + +/** + * Check that the given declaration contains no undefined variables. Returns the set of identifiers + * introduced by the node + * @param node + * @param identifiers + * @returns + */ +function checkDeclaration( + node: es.Declaration | es.ModuleDeclaration, + identifiers: Set +): Set { + switch (node.type) { + case 'ClassDeclaration': { + const localIdentifiers = new Set([...identifiers, node.id!.name]) + checkClass(node, localIdentifiers) + return new Set([node.id!.name]) + } + case 'FunctionDeclaration': { + // Add the name of the function to the set of identifiers so that + // recursive calls are possible + const localIdentifiers = new Set([...identifiers, node.id!.name]) + checkFunction(node, localIdentifiers) + return new Set([node.id!.name]) + } + case 'VariableDeclaration': + return checkVariableDeclaration(node, identifiers) + case 'ImportDeclaration': + case 'ExportAllDeclaration': + return new Set() + case 'ExportDefaultDeclaration': { + if (isDeclaration(node.declaration)) { + assert( + node.declaration.type !== 'VariableDeclaration', + 'ExportDefaultDeclarations should not be associated with VariableDeclarations' + ) + + if (node.declaration.id) { + return checkDeclaration(node.declaration, identifiers) + } + // TODO change declaration node type + } + checkExpression(node.declaration as es.Expression, identifiers) + return new Set() + } + case 'ExportNamedDeclaration': + return !node.declaration ? new Set() : checkDeclaration(node.declaration, identifiers) + } +} + +function checkStatement( + node: Exclude, + identifiers: Set +): void { + const checkBody = (node: es.Statement, localIdentifiers: Set) => { + assert(!isDeclaration(node), `${node.type} cannot be found here!`) + + if (node.type === 'BlockStatement') checkForUndefinedVariables(node, localIdentifiers) + else checkStatement(node, localIdentifiers) + } + + switch (node.type) { + case 'ExpressionStatement': { + checkExpression(node.expression, identifiers) + break + } + case 'ForStatement': { + const localIdentifiers = new Set(identifiers) + if (node.init) { + if (node.init.type === 'VariableDeclaration') { + // If the init clause declares variables, add them to the list of + // local identifiers that the for statement should check + const varDeclResult = checkVariableDeclaration(node.init, identifiers) + varDeclResult.forEach(localIdentifiers.add) + } else { + checkExpression(node.init, localIdentifiers) + } + } + + if (node.test) checkExpression(node.test, localIdentifiers) + if (node.update) checkExpression(node.update, localIdentifiers) + + checkBody(node.body, localIdentifiers) + break + } + case 'ForInStatement': + case 'ForOfStatement': { + const localIdentifiers = new Set(identifiers) + if (node.left.type === 'VariableDeclaration') { + const varDeclResult = checkVariableDeclaration(node.left, identifiers) + varDeclResult.forEach(localIdentifiers.add) + } + checkExpression(node.right, localIdentifiers) + checkBody(node, localIdentifiers) + break + } + case 'DoWhileStatement': + case 'WhileStatement': { + checkExpression(node.test, identifiers) + checkBody(node.body, identifiers) + break + } + case 'IfStatement': { + checkBody(node.consequent, identifiers) + if (node.alternate) checkBody(node.alternate, identifiers) + checkExpression(node.test, identifiers) + break + } + case 'SwitchStatement': { + node.cases.forEach(c => { + if (c.test) checkExpression(c.test, identifiers) + c.consequent.forEach(stmt => checkBody(stmt, identifiers)) + }) + break + } + case 'LabeledStatement': { + checkBody(node.body, identifiers) + break + } + case 'ReturnStatement': + // TODO Check why a return statement has an non expression argument + case 'ThrowStatement': { + checkExpression(node.argument as es.Expression, identifiers) + break + } + case 'TryStatement': { + // Check the try block + checkForUndefinedVariables(node.block, identifiers) + + // Check the finally block + if (node.finalizer) checkForUndefinedVariables(node.finalizer, identifiers) + + // Check the catch block + if (node.handler) { + const catchIds = new Set(identifiers) + if (node.handler.param) { + extractIdsFromPattern(node.handler.param).forEach(({ name }) => catchIds.add(name)) + } + checkForUndefinedVariables(node.handler.body, catchIds) + } + break + } + } +} + +export default function checkForUndefinedVariables( + node: es.Program | es.BlockStatement | es.StaticBlock, + identifiers: Set +) { + const localIdentifiers = new Set(identifiers) + + // Hoist class and function declarations + for (const stmt of node.body) { + switch (stmt.type) { + case 'ClassDeclaration': + case 'FunctionDeclaration': { + localIdentifiers.add(stmt.id!.name) + break + } + case 'ImportDeclaration': { + stmt.specifiers.forEach(({ local: { name } }) => localIdentifiers.add(name)) + break + } + case 'ExportNamedDeclaration': + case 'ExportDefaultDeclaration': { + if (!stmt.declaration) break + if ( + (stmt.declaration.type === 'ClassDeclaration' || + stmt.declaration.type === 'FunctionDeclaration') && + stmt.declaration.id + ) { + localIdentifiers.add(stmt.declaration.id.name) + } + break + } + } + } + + for (const stmt of node.body) { + if (isModuleOrRegDeclaration(stmt)) { + checkDeclaration(stmt, localIdentifiers).forEach(id => localIdentifiers.add(id)) + } else if (stmt.type === 'BlockStatement') { + checkForUndefinedVariables(node, localIdentifiers) + } else { + checkStatement(stmt, localIdentifiers) + } + } +} diff --git a/src/utils/assert.ts b/src/utils/assert.ts new file mode 100644 index 000000000..134f8d761 --- /dev/null +++ b/src/utils/assert.ts @@ -0,0 +1,5 @@ +export default function assert(condition: boolean, message?: string): asserts condition { + if (!condition) { + throw new Error(message) + } +} From edd52b581e850c5918b5977bb768903de97d350c Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Thu, 4 May 2023 01:22:12 +0800 Subject: [PATCH 18/95] Integrate source modules into preprocessor --- .../removeNonSourceModuleImports.ts | 57 --- src/localImports/analyzer.ts | 325 ++------------ src/localImports/preprocessor.ts | 411 ++++++++---------- .../transformers/hoistAndMergeImports.ts | 152 ++++--- .../transformers/removeExports.ts | 66 --- .../transformers/removeImportsAndExports.ts | 32 ++ .../removeNonSourceModuleImports.ts | 113 ----- .../transformProgramToFunctionDeclaration.ts | 11 +- src/localImports/typeGuards.ts | 50 --- 9 files changed, 337 insertions(+), 880 deletions(-) delete mode 100644 src/localImports/__tests__/transformers/removeNonSourceModuleImports.ts delete mode 100644 src/localImports/transformers/removeExports.ts create mode 100644 src/localImports/transformers/removeImportsAndExports.ts delete mode 100644 src/localImports/transformers/removeNonSourceModuleImports.ts delete mode 100644 src/localImports/typeGuards.ts diff --git a/src/localImports/__tests__/transformers/removeNonSourceModuleImports.ts b/src/localImports/__tests__/transformers/removeNonSourceModuleImports.ts deleted file mode 100644 index 7f6ebd8cb..000000000 --- a/src/localImports/__tests__/transformers/removeNonSourceModuleImports.ts +++ /dev/null @@ -1,57 +0,0 @@ -import { mockContext } from '../../../mocks/context' -import { parse } from '../../../parser/parser' -import { Chapter } from '../../../types' -import { removeNonSourceModuleImports } from '../../transformers/removeNonSourceModuleImports' -import { parseCodeError, stripLocationInfo } from '../utils' - -describe('removeNonSourceModuleImports', () => { - let actualContext = mockContext(Chapter.LIBRARY_PARSER) - let expectedContext = mockContext(Chapter.LIBRARY_PARSER) - - beforeEach(() => { - actualContext = mockContext(Chapter.LIBRARY_PARSER) - expectedContext = mockContext(Chapter.LIBRARY_PARSER) - }) - - const assertASTsAreEquivalent = (actualCode: string, expectedCode: string): void => { - const actualProgram = parse(actualCode, actualContext) - const expectedProgram = parse(expectedCode, expectedContext) - if (actualProgram === null || expectedProgram === null) { - throw parseCodeError - } - - removeNonSourceModuleImports(actualProgram) - expect(stripLocationInfo(actualProgram)).toEqual(stripLocationInfo(expectedProgram)) - } - - test('removes ImportDefaultSpecifier nodes', () => { - const actualCode = ` - import a from "./a.js"; - import x from "source-module"; - ` - const expectedCode = '' - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - // While 'removeNonSourceModuleImports' will remove ImportNamespaceSpecifier nodes, we - // cannot actually test it because ImportNamespaceSpecifier nodes are banned in the parser. - // test('removes ImportNamespaceSpecifier nodes', () => { - // const actualCode = ` - // import * as a from "./a.js"; - // import * as x from "source-module"; - // ` - // const expectedCode = '' - // assertASTsAreEquivalent(actualCode, expectedCode) - // }) - - test('removes only non-Source module ImportSpecifier nodes', () => { - const actualCode = ` - import { a, b, c } from "./a.js"; - import { x, y, z } from "source-module"; - ` - const expectedCode = ` - import { x, y, z } from "source-module"; - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) -}) diff --git a/src/localImports/analyzer.ts b/src/localImports/analyzer.ts index 0845cc99b..cd534f8e1 100644 --- a/src/localImports/analyzer.ts +++ b/src/localImports/analyzer.ts @@ -1,20 +1,13 @@ -import type * as es from 'estree' -import * as pathlib from 'path' -import { Context } from '..' -import { - memoizedGetModuleBundleAsync, - memoizedGetModuleDocsAsync -} from '../modules/moduleLoaderAsync' -import { parse } from '../parser/parser' -import { isDeclaration } from './typeGuards' +import * as es from 'estree' + +import { ReexportSymbolError } from '../errors/localImportErrors' import { - ModuleNotFoundError, UndefinedDefaultImportError, UndefinedImportError, UndefinedNamespaceImportError } from '../modules/errors' -import { CircularImportError, ReexportSymbolError } from '../errors/localImportErrors' -import assert from '../utils/assert' +import { extractIdsFromPattern } from '../utils/ast/astUtils' +import { isDeclaration } from '../utils/ast/typeGuards' class ArrayMap { constructor(private readonly map: Map = new Map()) {} @@ -39,237 +32,6 @@ class ArrayMap { } } -type LocalModuleInfo = { - type: 'local' - indegree: 0 - dependencies: Set - ast: es.Program -} - -export type ResolvedLocalModuleInfo = LocalModuleInfo & { - exports: Set -} - -type SourceModuleInfo = { - type: 'source' - exports: Set - text: string - indegree: 0 -} - -type ModuleInfo = LocalModuleInfo | SourceModuleInfo -export type ResolvedModuleInfo = ResolvedLocalModuleInfo | SourceModuleInfo -export type AnalysisResult = { - moduleInfos: Record - topoOrder: string[] -} - -const isSourceImport = (path: string) => !path.startsWith('.') && !path.startsWith('/') - -const analyzeImport = async ( - files: Partial>, - entrypointFilePath: string, - context: Context -) => { - function resolveModule( - desiredPath: string, - node: Exclude - ) { - const source = node.source?.value - if (typeof source !== 'string') { - throw new Error(`${node.type} should have a source of type string, got ${source}`) - } - - if (isSourceImport(source)) return source - - const modAbsPath = pathlib.resolve(desiredPath, '..', source) - if (files[modAbsPath] !== undefined) return modAbsPath - - throw new ModuleNotFoundError(modAbsPath, node) - } - - const moduleInfos: Record = {} - async function parseFile(desiredPath: string, currNode?: es.Node) { - if (desiredPath in moduleInfos) { - return - } - - if (isSourceImport(desiredPath)) { - const [bundleText, bundleDocs] = await Promise.all([ - memoizedGetModuleBundleAsync(desiredPath, currNode), - memoizedGetModuleDocsAsync(desiredPath, currNode) - ]) - - if (!bundleDocs) { - throw new Error() - } - - moduleInfos[desiredPath] = { - type: 'source', - text: bundleText, - exports: new Set(Object.keys(bundleDocs)), - indegree: 0 - } - } else { - const code = files[desiredPath]! - const program = parse(code, context, {}, true)! - - const dependencies = new Map() - - for (const node of program.body) { - switch (node.type) { - case 'ExportNamedDeclaration': { - if (!node.source) continue - } - case 'ExportAllDeclaration': - case 'ImportDeclaration': { - const modAbsPath = resolveModule(desiredPath, node) - if (modAbsPath === desiredPath) { - throw new CircularImportError([modAbsPath, desiredPath]) - } - - node.source!.value = modAbsPath - dependencies.set(modAbsPath, node) - break - } - } - } - - moduleInfos[desiredPath] = { - type: 'local', - indegree: 0, - dependencies: new Set(dependencies.keys()), - ast: program - } - - await Promise.all( - Array.from(dependencies.entries()).map(async ([dep, node]) => { - await parseFile(dep, node) - moduleInfos[dep].indegree++ - }) - ) - } - } - - await parseFile(entrypointFilePath) - return moduleInfos -} - -const findCycle = ( - moduleInfos: Record }> -) => { - // First, we pick any arbitrary node that is part of a cycle as our - // starting node. - const startingNodeInCycle = Object.keys(moduleInfos).find( - name => moduleInfos[name].indegree !== 0 - ) - // By the invariant stated above, it is impossible that the starting - // node cannot be found. The lack of a starting node implies that - // all nodes have an in-degree of 0 after running Kahn's algorithm. - // This in turn implies that Kahn's algorithm was able to find a - // valid topological ordering & that the graph contains no cycles. - assert(!!startingNodeInCycle, 'There are no cycles in this graph. This should never happen.') - - const cycle = [startingNodeInCycle] - // Then, we keep picking arbitrary nodes with non-zero in-degrees until - // we pick a node that has already been picked. - while (true) { - const currentNode = cycle[cycle.length - 1] - const { dependencies: neighbours } = moduleInfos[currentNode] - assert( - neighbours !== undefined, - 'The keys of the adjacency list & the in-degree maps are not the same. This should never occur.' - ) - - // By the invariant stated above, it is impossible that any node - // on the cycle has an in-degree of 0 after running Kahn's algorithm. - // An in-degree of 0 implies that the node is not part of a cycle, - // which is a contradiction since the current node was picked because - // it is part of a cycle. - assert( - neighbours.size > 0, - `Node '${currentNode}' has no incoming edges. This should never happen.` - ) - - const nextNodeInCycle = Array.from(neighbours).find( - neighbour => moduleInfos[neighbour].indegree !== 0 - ) - - // By the invariant stated above, if the current node is part of a cycle, - // then one of its neighbours must also be part of the same cycle. This - // is because a cycle contains at least 2 nodes. - assert( - !!nextNodeInCycle, - `None of the neighbours of node '${currentNode}' are part of the same cycle. This should never happen.` - ) - - // If the next node we pick is already part of the cycle, - // we drop all elements before the first instance of the - // next node and return the cycle. - const nextNodeIndex = cycle.indexOf(nextNodeInCycle) - const isNodeAlreadyInCycle = nextNodeIndex !== -1 - cycle.push(nextNodeInCycle) - if (isNodeAlreadyInCycle) { - return cycle.slice(nextNodeIndex) - } - } -} - -const getTopologicalOrder = (moduleInfos: Record) => { - const zeroDegrees = Object.entries(moduleInfos) - .filter(([, { indegree }]) => indegree === 0) - .map(([name]) => name) - const dependencyMap = new Map>() - - for (const [name, info] of Object.entries(moduleInfos)) { - if (info.type === 'local') { - dependencyMap.set(name, info.dependencies) - } - } - - const moduleCount = Object.keys(moduleInfos).length - const topoOrder = [...zeroDegrees] - - console.log(moduleInfos) - - for (let i = 0; i < moduleCount; i++) { - if (zeroDegrees.length === 0) { - const localModuleInfos = Object.entries(moduleInfos).reduce((res, [name, modInfo]) => { - if (modInfo.type === 'source') return res - return { - ...res, - [name]: { - indegree: modInfo.indegree, - dependencies: modInfo.dependencies - } - } - }, {} as Record }>) - - const cycle = findCycle(localModuleInfos) - throw new CircularImportError(cycle) - } - - const node = zeroDegrees.pop()! - const info = moduleInfos[node] - if (info.type === 'source') continue - const dependencies = dependencyMap.get(node)! - - if (!dependencies || dependencies.size === 0) { - continue - } - - for (const neighbour of dependencies.keys()) { - const neighbourInfo = moduleInfos[neighbour] - neighbourInfo.indegree-- - if (neighbourInfo.indegree === 0) { - zeroDegrees.push(neighbour) - topoOrder.unshift(neighbour) - } - } - } - return topoOrder -} - const validateDefaultImport = ( spec: es.ImportDefaultSpecifier | es.ExportSpecifier | es.ImportSpecifier, sourcePath: string, @@ -303,41 +65,37 @@ const validateNamespaceImport = ( } } -const validateImportAndExports = ( - moduleInfos: Record, +export const validateImportAndExports = ( + moduleDocs: Record | null>, + programs: Record, topoOrder: string[], allowUndefinedImports: boolean ) => { - const resolvedModuleInfos: Record = {} - - topoOrder.forEach(name => { - const info = moduleInfos[name] - if (info.type === 'source') { - resolvedModuleInfos[name] = info - return - } - + for (const name of topoOrder) { + const program = programs[name] const exportedSymbols = new ArrayMap< string, - es.ImportSpecifier | es.ExportSpecifier | es.ModuleDeclaration + es.ExportSpecifier | Exclude >() - info.ast.body.forEach(node => { + + for (const node of program.body) { switch (node.type) { case 'ImportDeclaration': { - if (!allowUndefinedImports) { - const { exports } = resolvedModuleInfos[node.source!.value as string] + const source = node.source!.value as string + const exports = moduleDocs[source] + if (!allowUndefinedImports && exports) { node.specifiers.forEach(spec => { switch (spec.type) { case 'ImportSpecifier': { - validateImport(spec, name, exports) + validateImport(spec, source, exports) break } case 'ImportDefaultSpecifier': { - validateDefaultImport(spec, name, exports) + validateDefaultImport(spec, source, exports) break } case 'ImportNamespaceSpecifier': { - validateNamespaceImport(spec, name, exports) + validateNamespaceImport(spec, source, exports) break } } @@ -357,14 +115,20 @@ const validateImportAndExports = ( case 'ExportNamedDeclaration': { if (node.declaration) { if (node.declaration.type === 'VariableDeclaration') { + for (const declaration of node.declaration.declarations) { + extractIdsFromPattern(declaration.id).forEach(id => { + exportedSymbols.add(id.name, node) + }) + } } else { exportedSymbols.add(node.declaration.id!.name, node) } } else if (node.source) { - const { exports } = resolvedModuleInfos[node.source!.value as string] + const source = node.source!.value as string + const exports = moduleDocs[source] node.specifiers.forEach(spec => { - if (!allowUndefinedImports) { - validateImport(spec, name, exports) + if (!allowUndefinedImports && exports) { + validateImport(spec, source, exports) } exportedSymbols.add(spec.exported.name, spec) @@ -375,13 +139,14 @@ const validateImportAndExports = ( break } case 'ExportAllDeclaration': { - const { exports } = resolvedModuleInfos[node.source!.value as string] - if (!allowUndefinedImports) { - validateNamespaceImport(node, name, exports) + const source = node.source!.value as string + const exports = moduleDocs[source] + if (!allowUndefinedImports && exports) { + validateNamespaceImport(node, source, exports) } if (node.exported) { exportedSymbols.add(node.exported.name, node) - } else { + } else if (exports) { for (const symbol of exports) { exportedSymbols.add(symbol, node) } @@ -389,9 +154,9 @@ const validateImportAndExports = ( break } } - }) + } - const exports = new Set( + moduleDocs[name] = new Set( exportedSymbols.entries().map(([symbol, nodes]) => { if (nodes.length === 1) { return symbol @@ -400,23 +165,5 @@ const validateImportAndExports = ( throw new ReexportSymbolError(name, symbol, nodes) }) ) - - resolvedModuleInfos[name] = { - ...info, - exports - } - }) - - return resolvedModuleInfos -} - -export default async function performImportAnalysis( - files: Partial>, - entrypointFilePath: string, - context: Context -): Promise { - const moduleInfos = await analyzeImport(files, entrypointFilePath, context) - const topoOrder = getTopologicalOrder(moduleInfos) - const resolvedInfos = validateImportAndExports(moduleInfos, topoOrder, false) - return { moduleInfos: resolvedInfos, topoOrder } + } } diff --git a/src/localImports/preprocessor.ts b/src/localImports/preprocessor.ts index 5cbbe3a34..c6bd4c543 100644 --- a/src/localImports/preprocessor.ts +++ b/src/localImports/preprocessor.ts @@ -1,12 +1,20 @@ import es from 'estree' import * as path from 'path' -import { CannotFindModuleError, CircularImportError } from '../errors/localImportErrors' +import { CircularImportError } from '../errors/localImportErrors' +import { ModuleNotFoundError } from '../modules/errors' +import { + memoizedGetModuleDocsAsync, + memoizedGetModuleManifestAsync +} from '../modules/moduleLoaderAsync' +import { ModuleManifest } from '../modules/moduleTypes' import { parse } from '../parser/parser' import { AcornOptions } from '../parser/types' import { Context } from '../types' +import assert from '../utils/assert' +import { isModuleDeclaration, isSourceImport } from '../utils/ast/typeGuards' import { isIdentifier } from '../utils/rttc' -import performImportAnalysis, { ResolvedLocalModuleInfo } from './analyzer' +import { validateImportAndExports } from './analyzer' import { createInvokedFunctionResultVariableDeclaration } from './constructors/contextSpecificConstructors' import { DirectedGraph } from './directedGraph' import { @@ -14,183 +22,122 @@ import { transformFunctionNameToInvokedFunctionResultVariableName } from './filePaths' import hoistAndMergeImports from './transformers/hoistAndMergeImports' -import { removeExports } from './transformers/removeExports' -import { - isSourceModule, - removeNonSourceModuleImports -} from './transformers/removeNonSourceModuleImports' +import removeImportsAndExports from './transformers/removeImportsAndExports' import { createAccessImportStatements, getInvokedFunctionResultVariableNameToImportSpecifiersMap, transformProgramToFunctionDeclaration } from './transformers/transformProgramToFunctionDeclaration' -import { isImportDeclaration, isModuleDeclaration } from './typeGuards' /** - * Returns all absolute local module paths which should be imported. - * This function makes use of the file path of the current file to - * determine the absolute local module paths. - * - * Note that the current file path must be absolute. - * - * @param program The program to be operated on. - * @param currentFilePath The file path of the current file. + * Error type to indicate that preprocessing has failed but that the context + * contains the underlying errors */ -export const getImportedLocalModulePaths = ( - program: es.Program, - currentFilePath: string -): Set => { - if (!path.isAbsolute(currentFilePath)) { - throw new Error(`Current file path '${currentFilePath}' is not absolute.`) - } +class PreprocessError extends Error {} - const baseFilePath = path.resolve(currentFilePath, '..') - const importedLocalModuleNames: Set = new Set() - const importDeclarations = program.body.filter(isImportDeclaration) - importDeclarations.forEach((importDeclaration: es.ImportDeclaration): void => { - const modulePath = importDeclaration.source.value - if (typeof modulePath !== 'string') { - throw new Error('Module names must be strings.') - } - if (!isSourceModule(modulePath)) { - const absoluteModulePath = path.resolve(baseFilePath, modulePath) - importedLocalModuleNames.add(absoluteModulePath) - } - }) - return importedLocalModuleNames +type ModuleResolutionOptions = { + directory?: boolean + extensions: string[] | null } -const newPreprocessor = async ( +const defaultResolutionOptions: Required = { + directory: false, + extensions: null +} + +const parseProgramsAndConstructImportGraph = async ( files: Partial>, entrypointFilePath: string, - context: Context -) => { - const { moduleInfos, topoOrder } = await performImportAnalysis(files, entrypointFilePath, context) - - // We want to operate on the entrypoint program to get the eventual - // preprocessed program. - const { ast: entrypointProgram } = moduleInfos[entrypointFilePath] as ResolvedLocalModuleInfo - const entrypointDirPath = path.resolve(entrypointFilePath, '..') - - // Create variables to hold the imported statements. - const entrypointProgramModuleDeclarations = entrypointProgram.body.filter(isModuleDeclaration) - const entrypointProgramInvokedFunctionResultVariableNameToImportSpecifiersMap = - getInvokedFunctionResultVariableNameToImportSpecifiersMap( - entrypointProgramModuleDeclarations, - entrypointDirPath - ) - const entrypointProgramAccessImportStatements = createAccessImportStatements( - entrypointProgramInvokedFunctionResultVariableNameToImportSpecifiersMap - ) + context: Context, + allowUndefinedImports: boolean, + rawResolutionOptions: Partial = {} +): Promise<{ + programs: Record + importGraph: DirectedGraph + moduleDocs: Record | null> +}> => { + const resolutionOptions = { + ...defaultResolutionOptions, + ...rawResolutionOptions + } - // Transform all programs into their equivalent function declaration - // except for the entrypoint program. - const functionDeclarations: Record = {} - for (const [filePath, moduleInfo] of Object.entries(moduleInfos)) { - if (moduleInfo.type === 'source') continue + const programs: Record = {} + const importGraph = new DirectedGraph() - // The entrypoint program does not need to be transformed into its - // function declaration equivalent as its enclosing environment is - // simply the overall program's (constructed program's) environment. - if (filePath === entrypointFilePath) { - continue - } + // If there is more than one file, tag AST nodes with the source file path. + const numOfFiles = Object.keys(files).length + const shouldAddSourceFileToAST = numOfFiles > 1 - const functionDeclaration = transformProgramToFunctionDeclaration(moduleInfo.ast, filePath) - const functionName = functionDeclaration.id?.name - if (functionName === undefined) { - throw new Error( - 'A transformed function declaration is missing its name. This should never happen.' - ) - } + const moduleDocs: Record | null> = {} + let moduleManifest: ModuleManifest | null = null + + // From the given import source, return the absolute path for that import + // If the import could not be located, then throw an error + async function resolveModule( + desiredPath: string, + node: Exclude + ) { + const source = node.source?.value + assert( + typeof source === 'string', + `${node.type} should have a source of type string, got ${source}` + ) - functionDeclarations[functionName] = functionDeclaration - } + let modAbsPath: string + if (isSourceImport(source)) { + if (!moduleManifest) { + moduleManifest = await memoizedGetModuleManifestAsync() + } - // Invoke each of the transformed functions and store the result in a variable. - const invokedFunctionResultVariableDeclarations: es.VariableDeclaration[] = [] - topoOrder.forEach((filePath: string): void => { - // As mentioned above, the entrypoint program does not have a function - // declaration equivalent, so there is no need to process it. - if (filePath === entrypointFilePath) { - return - } + if (source in moduleManifest) return source + modAbsPath = source + } else { + modAbsPath = path.resolve(desiredPath, '..', source) + if (files[modAbsPath] !== undefined) return modAbsPath - if (!filePath.startsWith('/')) return + if (resolutionOptions.directory && files[`${modAbsPath}/index`] !== undefined) { + return `${modAbsPath}/index` + } - const functionName = transformFilePathToValidFunctionName(filePath) - const invokedFunctionResultVariableName = - transformFunctionNameToInvokedFunctionResultVariableName(functionName) + if (resolutionOptions.extensions) { + for (const ext of resolutionOptions.extensions) { + if (files[`${modAbsPath}.${ext}`] !== undefined) return `${modAbsPath}.${ext}` - const functionDeclaration = functionDeclarations[functionName] - const functionParams = functionDeclaration.params.filter(isIdentifier) - if (functionParams.length !== functionDeclaration.params.length) { - throw new Error( - 'Function declaration contains non-Identifier AST nodes as params. This should never happen.' - ) + if (resolutionOptions.directory && files[`${modAbsPath}/index.${ext}`] !== undefined) { + return `${modAbsPath}/index.${ext}` + } + } + } } - const invokedFunctionResultVariableDeclaration = createInvokedFunctionResultVariableDeclaration( - functionName, - invokedFunctionResultVariableName, - functionParams - ) - invokedFunctionResultVariableDeclarations.push(invokedFunctionResultVariableDeclaration) - }) - - // Re-assemble the program. - const preprocessedProgram: es.Program = { - ...entrypointProgram, - body: [ - // ...sourceModuleImports, - ...Object.values(functionDeclarations), - ...invokedFunctionResultVariableDeclarations, - ...entrypointProgramAccessImportStatements, - ...entrypointProgram.body - ] + throw new ModuleNotFoundError(modAbsPath, node) } - // After this pre-processing step, all export-related nodes in the AST - // are no longer needed and are thus removed. - removeExports(preprocessedProgram) - - // Finally, we need to hoist all remaining imports to the top of the - // program. These imports should be source module imports since - // non-Source module imports would have already been removed. As part - // of this step, we also merge imports from the same module so as to - // import each unique name per module only once. - - const programs = Object.values(moduleInfos) - .filter(({ type }) => type === 'local') - .map(({ ast }: ResolvedLocalModuleInfo) => ast) - const importNodes = hoistAndMergeImports(programs) - const removedImports = preprocessedProgram.body.filter(({ type }) => type !== 'ImportDeclaration') - preprocessedProgram.body = [...importNodes, ...removedImports] - // console.log(generate(preprocessedProgram)) - return preprocessedProgram -} - -const parseProgramsAndConstructImportGraph = ( - files: Partial>, - entrypointFilePath: string, - context: Context -): { - programs: Record - importGraph: DirectedGraph -} => { - const programs: Record = {} - const importGraph = new DirectedGraph() + const parseFile = async (currentFilePath: string) => { + if (isSourceImport(currentFilePath)) { + if (!(currentFilePath in moduleDocs)) { + // Will not throw ModuleNotFoundError + // If this were invalid, resolveModule would have thrown already + if (allowUndefinedImports) { + moduleDocs[currentFilePath] = null + } else { + const docs = await memoizedGetModuleDocsAsync(currentFilePath) + if (!docs) { + throw new Error(`Failed to load documentation for ${currentFilePath}`) + } + moduleDocs[currentFilePath] = new Set(Object.keys(docs)) + } + } + return + } - // If there is more than one file, tag AST nodes with the source file path. - const numOfFiles = Object.keys(files).length - const shouldAddSourceFileToAST = numOfFiles > 1 + if (currentFilePath in programs) return - const parseFile = (currentFilePath: string): void => { const code = files[currentFilePath] - if (code === undefined) { - context.errors.push(new CannotFindModuleError(entrypointFilePath)) - return - } + assert( + code !== undefined, + "Module resolver should've thrown an error if the file path is not resolvable" + ) // Tag AST nodes with the source file path for use in error messages. const parserOptions: Partial = shouldAddSourceFileToAST @@ -198,66 +145,72 @@ const parseProgramsAndConstructImportGraph = ( sourceFile: currentFilePath } : {} - const program = parse(code, context, parserOptions) - if (program === null) { - return + const program = parse(code, context, parserOptions, false) + if (!program) { + // Due to a bug in the typed parser where throwOnError isn't respected, + // we need to throw a quick exit error here instead + throw new PreprocessError() } + // assert(program !== null, 'Parser should throw on error and not just return null') programs[currentFilePath] = program - const importedLocalModulePaths = getImportedLocalModulePaths(program, currentFilePath) - for (const importedLocalModulePath of importedLocalModulePaths) { - // If the source & destination nodes in the import graph are the - // same, then the file is trying to import from itself. This is a - // special case of circular imports. - if (importedLocalModulePath === currentFilePath) { - context.errors.push(new CircularImportError([importedLocalModulePath, currentFilePath])) - return - } - // If we traverse the same edge in the import graph twice, it means - // that there is a cycle in the graph. We terminate early so as not - // to get into an infinite loop (and also because there is no point - // in traversing cycles when our goal is to build up the import - // graph). - if (importGraph.hasEdge(importedLocalModulePath, currentFilePath)) { - continue + const dependencies = new Set() + for (const node of program.body) { + switch (node.type) { + case 'ExportNamedDeclaration': { + if (!node.source) continue + } + case 'ExportAllDeclaration': + case 'ImportDeclaration': { + const modAbsPath = await resolveModule(currentFilePath, node) + if (modAbsPath === currentFilePath) { + throw new CircularImportError([modAbsPath, currentFilePath]) + } + + dependencies.add(modAbsPath) + node.source!.value = modAbsPath + break + } } - // Since the file at 'currentFilePath' contains the import statement - // from the file at 'importedLocalModulePath', we treat the former - // as the destination node and the latter as the source node in our - // import graph. This is because when we insert the transformed - // function declarations into the resulting program, we need to start - // with the function declarations that do not depend on other - // function declarations. - importGraph.addEdge(importedLocalModulePath, currentFilePath) - // Recursively parse imported files. - parseFile(importedLocalModulePath) } + + await Promise.all( + Array.from(dependencies.keys()).map(async dependency => { + await parseFile(dependency) + if (!isSourceImport(dependency)) { + if (importGraph.hasEdge(dependency, currentFilePath)) { + throw new PreprocessError() + } + + importGraph.addEdge(dependency, currentFilePath) + } + }) + ) } - parseFile(entrypointFilePath) + try { + await parseFile(entrypointFilePath) + } catch (error) { + // console.log(error) + if (!(error instanceof PreprocessError)) { + context.errors.push(error) + } + } return { programs, - importGraph + importGraph, + moduleDocs } } -const getSourceModuleImports = (programs: Record): es.ImportDeclaration[] => { - const sourceModuleImports: es.ImportDeclaration[] = [] - Object.values(programs).forEach((program: es.Program): void => { - const importDeclarations = program.body.filter(isImportDeclaration) - importDeclarations.forEach((importDeclaration: es.ImportDeclaration): void => { - const importSource = importDeclaration.source.value - if (typeof importSource !== 'string') { - throw new Error('Module names must be strings.') - } - if (isSourceModule(importSource)) { - sourceModuleImports.push(importDeclaration) - } - }) - }) - return sourceModuleImports +export type PreprocessOptions = { + allowUndefinedImports?: boolean +} + +const defaultOptions: Required = { + allowUndefinedImports: false } /** @@ -277,16 +230,23 @@ const getSourceModuleImports = (programs: Record): es.Import * @param entrypointFilePath The absolute path of the entrypoint file. * @param context The information associated with the program evaluation. */ -export const preprocessFileImports = ( +const preprocessFileImports = async ( files: Partial>, entrypointFilePath: string, - context: Context -): es.Program | undefined => { + context: Context, + rawOptions: Partial = {} +): Promise => { + const { allowUndefinedImports } = { + ...defaultOptions, + ...rawOptions + } + // Parse all files into ASTs and build the import graph. - const { programs, importGraph } = parseProgramsAndConstructImportGraph( + const { programs, importGraph, moduleDocs } = await parseProgramsAndConstructImportGraph( files, entrypointFilePath, - context + context, + allowUndefinedImports ) // Return 'undefined' if there are errors while parsing. if (context.errors.length !== 0) { @@ -300,6 +260,18 @@ export const preprocessFileImports = ( return undefined } + try { + validateImportAndExports( + moduleDocs, + programs, + topologicalOrderResult.topologicalOrder, + allowUndefinedImports + ) + } catch (error) { + context.errors.push(error) + return undefined + } + // We want to operate on the entrypoint program to get the eventual // preprocessed program. const entrypointProgram = programs[entrypointFilePath] @@ -329,11 +301,10 @@ export const preprocessFileImports = ( const functionDeclaration = transformProgramToFunctionDeclaration(program, filePath) const functionName = functionDeclaration.id?.name - if (functionName === undefined) { - throw new Error( - 'A transformed function declaration is missing its name. This should never happen.' - ) - } + assert( + functionName !== undefined, + 'A transformed function declaration is missing its name. This should never happen.' + ) functionDeclarations[functionName] = functionDeclaration } @@ -353,11 +324,10 @@ export const preprocessFileImports = ( const functionDeclaration = functionDeclarations[functionName] const functionParams = functionDeclaration.params.filter(isIdentifier) - if (functionParams.length !== functionDeclaration.params.length) { - throw new Error( - 'Function declaration contains non-Identifier AST nodes as params. This should never happen.' - ) - } + assert( + functionParams.length === functionDeclaration.params.length, + 'Function declaration contains non-Identifier AST nodes as params. This should never happen.' + ) const invokedFunctionResultVariableDeclaration = createInvokedFunctionResultVariableDeclaration( functionName, @@ -367,35 +337,28 @@ export const preprocessFileImports = ( invokedFunctionResultVariableDeclarations.push(invokedFunctionResultVariableDeclaration) }) - // Get all Source module imports across the entrypoint program & all imported programs. - const sourceModuleImports = getSourceModuleImports(programs) - // Re-assemble the program. const preprocessedProgram: es.Program = { ...entrypointProgram, body: [ - ...sourceModuleImports, ...Object.values(functionDeclarations), ...invokedFunctionResultVariableDeclarations, ...entrypointProgramAccessImportStatements, ...entrypointProgram.body ] } + // Import and Export related nodes are no longer necessary, so we can remove them from the program entirely + removeImportsAndExports(preprocessedProgram) - // After this pre-processing step, all export-related nodes in the AST - // are no longer needed and are thus removed. - removeExports(preprocessedProgram) - // Likewise, all import-related nodes in the AST which are not Source - // module imports are no longer needed and are also removed. - removeNonSourceModuleImports(preprocessedProgram) // Finally, we need to hoist all remaining imports to the top of the // program. These imports should be source module imports since // non-Source module imports would have already been removed. As part // of this step, we also merge imports from the same module so as to // import each unique name per module only once. - // hoistAndMergeImports(Object.(moduleInfos)) + const importDecls = hoistAndMergeImports(Object.values(programs)) + preprocessedProgram.body = [...importDecls, ...preprocessedProgram.body] return preprocessedProgram } -export default newPreprocessor +export default preprocessFileImports diff --git a/src/localImports/transformers/hoistAndMergeImports.ts b/src/localImports/transformers/hoistAndMergeImports.ts index 20002449a..d8c526afe 100644 --- a/src/localImports/transformers/hoistAndMergeImports.ts +++ b/src/localImports/transformers/hoistAndMergeImports.ts @@ -1,87 +1,83 @@ import es from 'estree' -import * as _ from 'lodash' -import { createImportDeclaration, createLiteral } from '../constructors/baseConstructors' -import { cloneAndStripImportSpecifier } from '../constructors/contextSpecificConstructors' -import { isImportDeclaration } from '../typeGuards' -import { isSourceModule } from './removeNonSourceModuleImports' +import { isSourceImport } from '../../utils/ast/typeGuards' -/** - * Hoists import declarations to the top of the program & merges duplicate - * imports for the same module. - * - * Note that two modules are the same if and only if their import source - * is the same. This function does not resolve paths against a base - * directory. If such a functionality is required, this function will - * need to be modified. - * - * @param program The AST which should have its ImportDeclaration nodes - * hoisted & duplicate imports merged. - */ -export const hoistAndMergeImports = (program: es.Program): void => { - // Separate import declarations from non-import declarations. - const importDeclarations = program.body.filter(isImportDeclaration) - const nonImportDeclarations = program.body.filter( - (node: es.Directive | es.Statement | es.ModuleDeclaration): boolean => - !isImportDeclaration(node) - ) +// /** +// * Hoists import declarations to the top of the program & merges duplicate +// * imports for the same module. +// * +// * Note that two modules are the same if and only if their import source +// * is the same. This function does not resolve paths against a base +// * directory. If such a functionality is required, this function will +// * need to be modified. +// * +// * @param program The AST which should have its ImportDeclaration nodes +// * hoisted & duplicate imports merged. +// */ +// export const hoistAndMergeImports = (program: es.Program): void => { +// // Separate import declarations from non-import declarations. +// const importDeclarations = program.body.filter(isImportDeclaration) +// const nonImportDeclarations = program.body.filter( +// (node: es.Directive | es.Statement | es.ModuleDeclaration): boolean => +// !isImportDeclaration(node) +// ) - // Merge import sources & specifiers. - const importSourceToSpecifiersMap: Map< - string, - Array - > = new Map() - for (const importDeclaration of importDeclarations) { - const importSource = importDeclaration.source.value - if (typeof importSource !== 'string') { - throw new Error('Module names must be strings.') - } - const specifiers = importSourceToSpecifiersMap.get(importSource) ?? [] - for (const specifier of importDeclaration.specifiers) { - // The Acorn parser adds extra information to AST nodes that are not - // part of the ESTree types. As such, we need to clone and strip - // the import specifier AST nodes to get a canonical representation - // that we can use to keep track of whether the import specifier - // is a duplicate or not. - const strippedSpecifier = cloneAndStripImportSpecifier(specifier) - // Note that we cannot make use of JavaScript's built-in Set class - // as it compares references for objects. - const isSpecifierDuplicate = - specifiers.filter( - ( - specifier: es.ImportSpecifier | es.ImportDefaultSpecifier | es.ImportNamespaceSpecifier - ): boolean => { - return _.isEqual(strippedSpecifier, specifier) - } - ).length !== 0 - if (isSpecifierDuplicate) { - continue - } - specifiers.push(strippedSpecifier) - } - importSourceToSpecifiersMap.set(importSource, specifiers) - } +// // Merge import sources & specifiers. +// const importSourceToSpecifiersMap: Map< +// string, +// Array +// > = new Map() +// for (const importDeclaration of importDeclarations) { +// const importSource = importDeclaration.source.value +// if (typeof importSource !== 'string') { +// throw new Error('Module names must be strings.') +// } +// const specifiers = importSourceToSpecifiersMap.get(importSource) ?? [] +// for (const specifier of importDeclaration.specifiers) { +// // The Acorn parser adds extra information to AST nodes that are not +// // part of the ESTree types. As such, we need to clone and strip +// // the import specifier AST nodes to get a canonical representation +// // that we can use to keep track of whether the import specifier +// // is a duplicate or not. +// const strippedSpecifier = cloneAndStripImportSpecifier(specifier) +// // Note that we cannot make use of JavaScript's built-in Set class +// // as it compares references for objects. +// const isSpecifierDuplicate = +// specifiers.filter( +// ( +// specifier: es.ImportSpecifier | es.ImportDefaultSpecifier | es.ImportNamespaceSpecifier +// ): boolean => { +// return _.isEqual(strippedSpecifier, specifier) +// } +// ).length !== 0 +// if (isSpecifierDuplicate) { +// continue +// } +// specifiers.push(strippedSpecifier) +// } +// importSourceToSpecifiersMap.set(importSource, specifiers) +// } - // Convert the merged import sources & specifiers back into import declarations. - const mergedImportDeclarations: es.ImportDeclaration[] = [] - importSourceToSpecifiersMap.forEach( - ( - specifiers: Array< - es.ImportSpecifier | es.ImportDefaultSpecifier | es.ImportNamespaceSpecifier - >, - importSource: string - ): void => { - mergedImportDeclarations.push( - createImportDeclaration(specifiers, createLiteral(importSource)) - ) - } - ) +// // Convert the merged import sources & specifiers back into import declarations. +// const mergedImportDeclarations: es.ImportDeclaration[] = [] +// importSourceToSpecifiersMap.forEach( +// ( +// specifiers: Array< +// es.ImportSpecifier | es.ImportDefaultSpecifier | es.ImportNamespaceSpecifier +// >, +// importSource: string +// ): void => { +// mergedImportDeclarations.push( +// createImportDeclaration(specifiers, createLiteral(importSource)) +// ) +// } +// ) - // Hoist the merged import declarations to the top of the program body. - program.body = [...mergedImportDeclarations, ...nonImportDeclarations] -} +// // Hoist the merged import declarations to the top of the program body. +// program.body = [...mergedImportDeclarations, ...nonImportDeclarations] +// } -export default function hoistAndMergeImportsNew(programs: es.Program[]) { +export default function hoistAndMergeImports(programs: es.Program[]) { const allNodes = programs.flatMap(({ body }) => body) const importNodes = allNodes.filter( @@ -91,7 +87,7 @@ export default function hoistAndMergeImportsNew(programs: es.Program[]) { for (const node of importNodes) { const source = node.source!.value as string // We no longer need imports from non-source modules, so we can just ignore them - if (!isSourceModule(source)) continue + if (!isSourceImport(source)) continue if (!importsToSpecifiers.has(source)) { importsToSpecifiers.set(source, new Map()) diff --git a/src/localImports/transformers/removeExports.ts b/src/localImports/transformers/removeExports.ts deleted file mode 100644 index 7e81e9367..000000000 --- a/src/localImports/transformers/removeExports.ts +++ /dev/null @@ -1,66 +0,0 @@ -import es from 'estree' - -import { ancestor } from '../../utils/walkers' -import { isDeclaration } from '../typeGuards' - -/** - * Removes all export-related nodes from the AST. - * - * Export-related AST nodes are only needed in the local imports pre-processing - * step to determine which functions/variables/expressions should be made - * available to other files/modules. After which, they have no functional effect - * on program evaluation. - * - * @param program The AST which should be stripped of export-related nodes. - */ -export const removeExports = (program: es.Program): void => { - ancestor(program, { - // TODO: Handle other export AST nodes. - ExportNamedDeclaration( - node: es.ExportNamedDeclaration, - _state: es.Node[], - ancestors: es.Node[] - ) { - // The ancestors array contains the current node, meaning that the - // parent node is the second last node of the array. - const parent = ancestors[ancestors.length - 2] - // The parent node of an ExportNamedDeclaration node must be a Program node. - if (parent.type !== 'Program') { - return - } - const nodeIndex = parent.body.findIndex(n => n === node) - if (node.declaration) { - // If the ExportNamedDeclaration node contains a declaration, replace - // it with the declaration node in its parent node's body. - parent.body[nodeIndex] = node.declaration - } else { - // Otherwise, remove the ExportNamedDeclaration node in its parent node's body. - parent.body.splice(nodeIndex, 1) - } - }, - ExportDefaultDeclaration( - node: es.ExportDefaultDeclaration, - _state: es.Node[], - ancestors: es.Node[] - ) { - // The ancestors array contains the current node, meaning that the - // parent node is the second last node of the array. - const parent = ancestors[ancestors.length - 2] - // The parent node of an ExportNamedDeclaration node must be a Program node. - if (parent.type !== 'Program') { - return - } - const nodeIndex = parent.body.findIndex(n => n === node) - // 'node.declaration' can be either a Declaration or an Expression. - if (isDeclaration(node.declaration)) { - // If the ExportDefaultDeclaration node contains a declaration, replace - // it with the declaration node in its parent node's body. - parent.body[nodeIndex] = node.declaration - } else { - // Otherwise, the ExportDefaultDeclaration node contains a statement. - // Remove the ExportDefaultDeclaration node in its parent node's body. - parent.body.splice(nodeIndex, 1) - } - } - }) -} diff --git a/src/localImports/transformers/removeImportsAndExports.ts b/src/localImports/transformers/removeImportsAndExports.ts new file mode 100644 index 000000000..8e1a11ca6 --- /dev/null +++ b/src/localImports/transformers/removeImportsAndExports.ts @@ -0,0 +1,32 @@ +import { Program, Statement } from 'estree' + +import assert from '../../utils/assert' +import { isDeclaration } from '../../utils/ast/typeGuards' + +export default function removeImportsAndExports(program: Program) { + const newBody = program.body.reduce((res, node) => { + switch (node.type) { + case 'ExportDefaultDeclaration': { + if (isDeclaration(node.declaration)) { + assert( + node.declaration.type !== 'VariableDeclaration', + 'ExportDefaultDeclarations should not have variable declarations' + ) + if (node.declaration.id) { + return [...res, node.declaration] + } + } + return res + } + case 'ExportNamedDeclaration': + return node.declaration ? [...res, node.declaration] : res + case 'ImportDeclaration': + case 'ExportAllDeclaration': + return res + default: + return [...res, node] + } + }, [] as Statement[]) + + program.body = newBody +} diff --git a/src/localImports/transformers/removeNonSourceModuleImports.ts b/src/localImports/transformers/removeNonSourceModuleImports.ts deleted file mode 100644 index 0aa3f99e9..000000000 --- a/src/localImports/transformers/removeNonSourceModuleImports.ts +++ /dev/null @@ -1,113 +0,0 @@ -import es from 'estree' - -import { ancestor } from '../../utils/walkers' -import { isFilePath } from '../filePaths' - -/** - * Returns whether a module name refers to a Source module. - * We define a Source module name to be any string that is not - * a file path. - * - * Source module import: `import { x } from "module";` - * Local (relative) module import: `import { x } from "./module";` - * Local (absolute) module import: `import { x } from "/dir/dir2/module";` - * - * @param moduleName The name of the module. - */ -export const isSourceModule = (moduleName: string): boolean => { - return !isFilePath(moduleName) -} - -/** - * Removes all non-Source module import-related nodes from the AST. - * - * All import-related nodes which are not removed in the pre-processing - * step will be treated by the Source modules loader as a Source module. - * If a Source module by the same name does not exist, the program - * evaluation will error out. As such, this function removes all - * import-related AST nodes which the Source module loader does not - * support, as well as ImportDeclaration nodes for local module imports. - * - * The definition of whether a module is a local module or a Source - * module depends on the implementation of the `isSourceModule` function. - * - * @param program The AST which should be stripped of non-Source module - * import-related nodes. - */ -export const removeNonSourceModuleImports = (program: es.Program): void => { - // First pass: remove all import AST nodes which are unused by Source modules. - ancestor(program, { - ImportSpecifier(_node: es.ImportSpecifier, _state: es.Node[], _ancestors: es.Node[]): void { - // Nothing to do here since ImportSpecifier nodes are used by Source modules. - }, - ImportDefaultSpecifier( - node: es.ImportDefaultSpecifier, - _state: es.Node[], - ancestors: es.Node[] - ): void { - // The ancestors array contains the current node, meaning that the - // parent node is the second last node of the array. - const parent = ancestors[ancestors.length - 2] - // The parent node of an ImportDefaultSpecifier node must be an ImportDeclaration node. - if (parent.type !== 'ImportDeclaration') { - return - } - const nodeIndex = parent.specifiers.findIndex(n => n === node) - // Remove the ImportDefaultSpecifier node in its parent node's array of specifiers. - // This is because Source modules do not support default imports. - parent.specifiers.splice(nodeIndex, 1) - }, - ImportNamespaceSpecifier( - node: es.ImportNamespaceSpecifier, - _state: es.Node[], - ancestors: es.Node[] - ): void { - // The ancestors array contains the current node, meaning that the - // parent node is the second last node of the array. - const parent = ancestors[ancestors.length - 2] - // The parent node of an ImportNamespaceSpecifier node must be an ImportDeclaration node. - if (parent.type !== 'ImportDeclaration') { - return - } - const nodeIndex = parent.specifiers.findIndex(n => n === node) - // Remove the ImportNamespaceSpecifier node in its parent node's array of specifiers. - // This is because Source modules do not support namespace imports. - parent.specifiers.splice(nodeIndex, 1) - } - }) - - // Operate on a copy of the Program node's body to prevent the walk from missing ImportDeclaration nodes. - const programBody = [...program.body] - const removeImportDeclaration = (node: es.ImportDeclaration, ancestors: es.Node[]): void => { - // The ancestors array contains the current node, meaning that the - // parent node is the second last node of the array. - const parent = ancestors[ancestors.length - 2] - // The parent node of an ImportDeclaration node must be a Program node. - if (parent.type !== 'Program') { - return - } - const nodeIndex = programBody.findIndex(n => n === node) - // Remove the ImportDeclaration node in its parent node's body. - programBody.splice(nodeIndex, 1) - } - // Second pass: remove all ImportDeclaration nodes for non-Source modules, or that do not - // have any specifiers (thus being functionally useless). - ancestor(program, { - ImportDeclaration(node: es.ImportDeclaration, _state: es.Node[], ancestors: es.Node[]): void { - if (typeof node.source.value !== 'string') { - throw new Error('Module names must be strings.') - } - // ImportDeclaration nodes without any specifiers are functionally useless and are thus removed. - if (node.specifiers.length === 0) { - removeImportDeclaration(node, ancestors) - return - } - // Non-Source modules should already have been handled in the pre-processing step and are no - // longer needed. They must be removed to avoid being treated as Source modules. - if (!isSourceModule(node.source.value)) { - removeImportDeclaration(node, ancestors) - } - } - }) - program.body = programBody -} diff --git a/src/localImports/transformers/transformProgramToFunctionDeclaration.ts b/src/localImports/transformers/transformProgramToFunctionDeclaration.ts index 98a179106..e809575af 100644 --- a/src/localImports/transformers/transformProgramToFunctionDeclaration.ts +++ b/src/localImports/transformers/transformProgramToFunctionDeclaration.ts @@ -2,6 +2,13 @@ import es from 'estree' import * as path from 'path' import { defaultExportLookupName } from '../../stdlib/localImport.prelude' +import { + isDeclaration, + isDirective, + isModuleDeclaration, + isSourceImport, + isStatement +} from '../../utils/ast/typeGuards' import { createFunctionDeclaration, createIdentifier, @@ -17,8 +24,6 @@ import { transformFilePathToValidFunctionName, transformFunctionNameToInvokedFunctionResultVariableName } from '../filePaths' -import { isDeclaration, isDirective, isModuleDeclaration, isStatement } from '../typeGuards' -import { isSourceModule } from './removeNonSourceModuleImports' type ImportSpecifier = es.ImportSpecifier | es.ImportDefaultSpecifier | es.ImportNamespaceSpecifier @@ -40,7 +45,7 @@ export const getInvokedFunctionResultVariableNameToImportSpecifiersMap = ( ) } // Only handle import declarations for non-Source modules. - if (isSourceModule(importSource)) { + if (isSourceImport(importSource)) { return } // Different import sources can refer to the same file. For example, diff --git a/src/localImports/typeGuards.ts b/src/localImports/typeGuards.ts deleted file mode 100644 index 6bc97715e..000000000 --- a/src/localImports/typeGuards.ts +++ /dev/null @@ -1,50 +0,0 @@ -import es from 'estree' - -// It is necessary to write this type guard like this as the 'type' of both -// 'Directive' & 'ExpressionStatement' is 'ExpressionStatement'. -// -// export interface Directive extends BaseNode { -// type: "ExpressionStatement"; -// expression: Literal; -// directive: string; -// } -// -// export interface ExpressionStatement extends BaseStatement { -// type: "ExpressionStatement"; -// expression: Expression; -// } -// -// As such, we check whether the 'directive' property exists on the object -// instead in order to differentiate between the two. -export const isDirective = (node: es.Node): node is es.Directive => { - return 'directive' in node -} - -export const isModuleDeclaration = (node: es.Node): node is es.ModuleDeclaration => { - return [ - 'ImportDeclaration', - 'ExportNamedDeclaration', - 'ExportDefaultDeclaration', - 'ExportAllDeclaration' - ].includes(node.type) -} - -export const isStatement = ( - node: es.Directive | es.Statement | es.ModuleDeclaration -): node is es.Statement => { - return !isDirective(node) && !isModuleDeclaration(node) -} - -export function isDeclaration(node: es.Node): node is es.Declaration { - // export type Declaration = - // FunctionDeclaration | VariableDeclaration | ClassDeclaration; - return ( - node.type === 'VariableDeclaration' || - node.type === 'FunctionDeclaration' || - node.type === 'ClassDeclaration' - ) -} - -export function isImportDeclaration(node: es.Node): node is es.ImportDeclaration { - return node.type === 'ImportDeclaration' -} From eb3840205554ef51441e5f1e97638b4537a9e4f4 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Thu, 4 May 2023 01:23:31 +0800 Subject: [PATCH 19/95] Remove import checking from import loader --- src/modules/moduleTypes.ts | 1 - src/modules/utils.ts | 64 ++------------------------------------ 2 files changed, 3 insertions(+), 62 deletions(-) diff --git a/src/modules/moduleTypes.ts b/src/modules/moduleTypes.ts index a00162857..803e342c0 100644 --- a/src/modules/moduleTypes.ts +++ b/src/modules/moduleTypes.ts @@ -15,7 +15,6 @@ export type ModuleFunctions = { export type ModuleDocumentation = Record export type ImportTransformOptions = { - checkImports: boolean loadTabs: boolean wrapModules: boolean // useThis: boolean; diff --git a/src/modules/utils.ts b/src/modules/utils.ts index f4366067a..bc90e9b82 100644 --- a/src/modules/utils.ts +++ b/src/modules/utils.ts @@ -2,11 +2,6 @@ import { ImportDeclaration, Node } from 'estree' import { Context } from '..' import { getUniqueId } from '../utils/uniqueIds' -import { - UndefinedDefaultImportError, - UndefinedImportError, - UndefinedNamespaceImportError -} from './errors' import { loadModuleTabs } from './moduleLoader' import { loadModuleTabsAsync } from './moduleLoaderAsync' @@ -52,11 +47,6 @@ export async function initModuleContextAsync( * Represents a loaded Source module */ export type ModuleInfo = { - /** - * List of symbols exported by the module. This field is `null` if `checkImports` is `false`. - */ - docs: Set | null - /** * `ImportDeclarations` that import from this module. */ @@ -97,15 +87,6 @@ export type SpecifierProcessor = ( node: ImportDeclaration ) => Transformed -/** - * Function to obtain the set of symbols exported by the given module - */ -type SymbolLoader = ( - name: string, - info: ModuleInfo, - node?: Node -) => Promise | null> - export type ImportSpecifierType = | 'ImportSpecifier' | 'ImportDefaultSpecifier' @@ -113,15 +94,13 @@ export type ImportSpecifierType = /** * This function is intended to unify how each of the different Source runners load imports. It handles - * import checking (if `checkImports` is given as `true`), namespacing (if `usedIdentifiers` is provided), - * loading the module's context (if `context` is not `null`), loading the module's tabs (if `loadTabs` is given as `true`) and the conversion + * namespacing (if `usedIdentifiers` is provided), loading the module's context (if `context` is not `null`), + * loading the module's tabs (if `loadTabs` is given as `true`) and the conversion * of import specifiers to the relevant type used by the runner. * @param nodes Nodes to transform * @param context Context to transform with, or `null`. Setting this to null prevents module contexts and tabs from being loaded. * @param loadTabs Set this to false to prevent tabs from being loaded even if a context is provided. - * @param checkImports Pass true to enable checking for undefined imports, false to skip these checks * @param moduleLoader Function that takes the name of the module and returns its loaded representation. - * @param symbolsLoader Function that takes a loaded module and returns a set containing its exported symbols. This is used for import checking * @param processors Functions for working with each type of import specifier. * @param usedIdentifiers Set containing identifiers already used in code. If null, namespacing is not conducted. * @returns The loaded modules, along with the transformed versions of the given nodes @@ -130,9 +109,7 @@ export async function transformImportNodesAsync( nodes: ImportDeclaration[], context: Context | null, loadTabs: boolean, - checkImports: boolean, moduleLoader: (name: string, node?: Node) => Promise, - symbolsLoader: SymbolLoader, processors: Record>, usedIdentifiers?: Set ) { @@ -158,24 +135,14 @@ export async function transformImportNodesAsync( if (!(moduleName in res)) { // First time we are loading this module res[moduleName] = { - docs: null, nodes: [], content: null as any, namespaced: null } - let loadPromise = internalLoader(moduleName, node).then(content => { + const loadPromise = internalLoader(moduleName, node).then(content => { res[moduleName].content = content }) - if (checkImports) { - // symbolsLoader must run after internalLoader finishes loading as it may need the - // loaded module. - loadPromise = loadPromise.then(() => { - symbolsLoader(moduleName, res[moduleName], node).then(docs => { - res[moduleName].docs = docs - }) - }) - } promises.push(loadPromise) } @@ -197,10 +164,6 @@ export async function transformImportNodesAsync( const namespaced = usedIdentifiers ? getUniqueId(usedIdentifiers, '__MODULE__') : null info.namespaced = namespaced - if (checkImports && info.docs === null) { - console.warn(`Failed to load documentation for ${moduleName}, skipping typechecking`) - } - if (info.content === null) { throw new Error(`${moduleName} was not loaded properly. This should never happen`) } @@ -210,27 +173,6 @@ export async function transformImportNodesAsync( [moduleName]: { content: info.nodes.flatMap(node => node.specifiers.flatMap(spec => { - if (checkImports && info.docs) { - // Conduct import checking if checkImports is true and the symbols were - // successfully loaded (not null) - switch (spec.type) { - case 'ImportSpecifier': { - if (!info.docs.has(spec.imported.name)) - throw new UndefinedImportError(spec.imported.name, moduleName, spec) - break - } - case 'ImportDefaultSpecifier': { - if (!info.docs.has('default')) - throw new UndefinedDefaultImportError(moduleName, spec) - break - } - case 'ImportNamespaceSpecifier': { - if (info.docs.size === 0) - throw new UndefinedNamespaceImportError(moduleName, spec) - break - } - } - } // Finally, transform that specifier into the form needed // by the runner return processors[spec.type](spec, info, node) From 39b47d2fc16553c908b9cf2b05cb28bfe8bf31b6 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Thu, 4 May 2023 01:25:02 +0800 Subject: [PATCH 20/95] Update undefined variable checker --- src/transpiler/__tests__/modules.ts | 2 - src/transpiler/__tests__/variableChecker.ts | 117 ++++++++++++++++++++ src/transpiler/transpiler.ts | 80 ++++++------- src/transpiler/variableChecker.ts | 74 ++----------- 4 files changed, 163 insertions(+), 110 deletions(-) create mode 100644 src/transpiler/__tests__/variableChecker.ts diff --git a/src/transpiler/__tests__/modules.ts b/src/transpiler/__tests__/modules.ts index d31ec4d5a..5d97abcbd 100644 --- a/src/transpiler/__tests__/modules.ts +++ b/src/transpiler/__tests__/modules.ts @@ -56,7 +56,6 @@ test('Transform import declarations into variable declarations', async () => { const context = mockContext(Chapter.SOURCE_4) const program = parse(code, context)! const [, importNodes] = await transformImportDeclarations(program, context, new Set(), { - checkImports: true, wrapModules: true, loadTabs: false }) @@ -91,7 +90,6 @@ test('Transpiler accounts for user variable names when transforming import state context, new Set(['__MODULE__', '__MODULE__0']), { - checkImports: false, loadTabs: false, wrapModules: false } diff --git a/src/transpiler/__tests__/variableChecker.ts b/src/transpiler/__tests__/variableChecker.ts new file mode 100644 index 000000000..128b0bc37 --- /dev/null +++ b/src/transpiler/__tests__/variableChecker.ts @@ -0,0 +1,117 @@ +import type { Context } from '../..' +import { mockContext } from '../../mocks/context' +import { parse } from '../../parser/parser' +import { Chapter } from '../../types' +import checkForUndefinedVariables from '../variableChecker' + +function assertUndefined(code: string, context: Context, message: string | null) { + const parsed = parse(code, context, {}, true)! + // console.log(parsed.type) + if (message !== null) { + expect(() => checkForUndefinedVariables(parsed, new Set())).toThrowError(message) + } else { + expect(() => checkForUndefinedVariables(parsed, new Set())).not.toThrow() + } +} + +function testCases(desc: string, cases: [name: string, code: string, err: null | string][]) { + const context = mockContext(Chapter.FULL_JS) + describe(desc, () => { + test.concurrent.each(cases)('%#. %s', (_, code, expected) => + assertUndefined(code, context, expected) + ) + }) +} + +describe('Test variable declarations', () => { + testCases('Test checking variable declarations', [ + ['Check single declaration', 'const x = unknown_var;', ''], + ['Check multiple declarations', 'const x = unknown_var, y = unknown_var;', ''], + ['Check object pattern declaration', 'const x = { item0: unknown_var };', ''], + ['Check nested object pattern declaration', 'const x = { item0: { ...unknown_var } };', ''], + ['Check array pattern declaration', 'const [x, y, { z }] = unknown_var;', ''], + ['Check let declaration', 'let x; 5+5; x = 0;', null] + ]) + + testCases('Test destructuring variable declarations', [ + ['Check object destructuring', 'const { x: { a, ...b }, c } = {}; a; b; c;', null], + ['Check array destructuring', 'const [a,,[b ,c], ...d] = []; a; b; c; d;', null] + ]) +}) + +describe('Test functions', () => { + describe('Test function declarations', () => { + testCases('Check that function declarations are hoisted', [ + ['Account for functions within the same scope', 'a(); function a() {}', null], + [ + 'Account for functions within different scopes', + 'a(); function a() { b(); function b() { c(); } } function c() {}', + null + ], + [ + 'Declarations should not be accessible from outer scopes', + 'function a() { function b() { } } b()', + '' + ] + ]) + + testCases('Test undefined variable checking', [ + [ + 'Function parameters are accounted for', + 'function hi_there(a, b, c, d) { hi_there; a; b; c; d; }', + null + ], + [ + 'Destructured parameters are accounted for', + 'function hi_there({a, e: { x: [c], ...d } }, b) { hi_there; a; b; c; d; }', + null + ], + ['Function bodies are checked correctly', 'function hi_there() { unknown_var }', ''], + [ + 'Identifiers from outside scopes are accounted for', + 'const known = 0; function hi_there() { return known }', + null + ] + ]) + }) + + testCases('Test arrow function expressions', [ + [ + 'Function parameters are accounted for', + 'const hi_there = (a, b, c, d) => { hi_there; a; b; c; d; }', + null + ], + [ + 'Destructured parameters are accounted for', + 'const hi_there = ({a, e: { x: [c], ...d } }, b) => { hi_there; a; b; c; d; }', + null + ], + ['Function bodies are checked correctly', 'const hi_there = () => { unknown_var }', ''], + [ + 'Function expression bodies are checked correctly', + 'const hi_there = param => unknown_var && param', + '' + ] + ]) + + testCases('Test function expressions', [ + [ + 'Function parameters are accounted for', + 'const hi_there = function (a, b, c, d) { hi_there; a; b; c; d; }', + null + ], + [ + 'Destructured parameters are accounted for', + 'const hi_there = function ({a, e: { x: [c], ...d } }, b) { hi_there; a; b; c; d; }', + null + ], + ['Function bodies are checked correctly', 'const hi_there = function () { unknown_var }', ''] + ]) +}) + +describe('Test export and import declarations', () => { + testCases('Test ExportNamedDeclaration', [ + ['Export function declarations are hoisted', 'hi(); export function hi() {}', null], + ['Export function declarations are checked', 'hi(); export function hi() { unknown_var }', ''] + ]) +}) diff --git a/src/transpiler/transpiler.ts b/src/transpiler/transpiler.ts index c6da25b51..cb1556fdc 100644 --- a/src/transpiler/transpiler.ts +++ b/src/transpiler/transpiler.ts @@ -5,14 +5,12 @@ import { partition } from 'lodash' import { RawSourceMap, SourceMapGenerator } from 'source-map' import { NATIVE_STORAGE_ID, REQUIRE_PROVIDER_ID, UNKNOWN_LOCATION } from '../constants' -import { - memoizedGetModuleBundleAsync, - memoizedGetModuleDocsAsync -} from '../modules/moduleLoaderAsync' +import { memoizedGetModuleBundleAsync } from '../modules/moduleLoaderAsync' import { ImportTransformOptions } from '../modules/moduleTypes' import { transformImportNodesAsync } from '../modules/utils' import { AllowedDeclarations, Chapter, Context, NativeStorage, Variant } from '../types' -import * as create from '../utils/astCreator' +import * as create from '../utils/ast/astCreator' +import { isImportDeclaration } from '../utils/ast/typeGuards' import { getIdentifiersInNativeStorage, getIdentifiersInProgram, @@ -47,66 +45,58 @@ export async function transformImportDeclarations( program: es.Program, context: Context | null, usedIdentifiers: Set, - { checkImports, loadTabs, wrapModules }: ImportTransformOptions, + { loadTabs, wrapModules }: ImportTransformOptions, useThis: boolean = false ): Promise<[string, es.VariableDeclaration[], es.Program['body']]> { - const [importNodes, otherNodes] = partition( - program.body, - node => node.type === 'ImportDeclaration' - ) + const [importNodes, otherNodes] = partition(program.body, isImportDeclaration) as [ + es.ImportDeclaration[], + es.Statement[] + ] if (importNodes.length === 0) return ['', [], otherNodes] - const moduleInfos = await transformImportNodesAsync( - importNodes as es.ImportDeclaration[], + const infos = await transformImportNodesAsync( + importNodes, context, loadTabs, - checkImports, (name, node) => memoizedGetModuleBundleAsync(name, node), - async (name, info, node) => { - const docs = await memoizedGetModuleDocsAsync(name, node) - if (!docs) return null - return new Set(Object.keys(docs)) - }, { - ImportSpecifier(specifier: es.ImportSpecifier, { namespaced }) { - return create.constantDeclaration( - specifier.local.name, - create.memberExpression(create.identifier(namespaced!), specifier.imported.name) - ) - }, - ImportDefaultSpecifier(specifier, { namespaced }) { - return create.constantDeclaration( - specifier.local.name, + ImportSpecifier: (spec: es.ImportSpecifier, { namespaced }) => + create.constantDeclaration( + spec.local.name, + create.memberExpression(create.identifier(namespaced!), spec.imported.name) + ), + ImportDefaultSpecifier: (spec, { namespaced }) => + create.constantDeclaration( + spec.local.name, create.memberExpression(create.identifier(namespaced!), 'default') - ) - }, - ImportNamespaceSpecifier(specifier, { namespaced }) { - return create.constantDeclaration(specifier.local.name, create.identifier(namespaced!)) - } + ), + ImportNamespaceSpecifier: (spec, { namespaced }) => + create.constantDeclaration(spec.local.name, create.identifier(namespaced!)) }, usedIdentifiers ) - const [prefix, declNodes] = Object.entries(moduleInfos).reduce( + const [prefix, declNodes] = Object.entries(infos).reduce( ( [prefixes, nodes], [ moduleName, { content, - info: { content: text, namespaced } + info: { namespaced, content: text } } ] ) => { - prefixes.push(`// ${moduleName} module`) + const header = `// ${moduleName} module` const modifiedText = wrapModules ? `${NATIVE_STORAGE_ID}.operators.get("wrapSourceModule")("${moduleName}", ${text}, ${REQUIRE_PROVIDER_ID})` : `(${text})(${REQUIRE_PROVIDER_ID})` - prefixes.push(`const ${namespaced} = ${modifiedText}\n`) - - return [prefixes, [...nodes, ...content]] + return [ + [...prefixes, `${header}\nconst ${namespaced!} = ${modifiedText}\n`], + [...nodes, ...content] + ] }, [[], []] as [string[], es.VariableDeclaration[]] ) @@ -605,6 +595,10 @@ async function transpileToSource( return { transpiled: '' } } + if (!skipUndefined) { + checkForUndefinedVariables(program, usedIdentifiers) + } + const functionsToStringMap = generateFunctionsToStringMap(program) transformReturnStatementsToAllowProperTailCalls(program) @@ -613,9 +607,7 @@ async function transpileToSource( transformSomeExpressionsToCheckIfBoolean(program, globalIds) transformPropertyAssignment(program, globalIds) transformPropertyAccess(program, globalIds) - if (!skipUndefined) { - checkForUndefinedVariables(program, usedIdentifiers) - } + transformFunctionDeclarationsToArrowFunctions(program, functionsToStringMap) wrapArrowFunctionsToAllowNormalCallsAndNiceToString(program, functionsToStringMap, globalIds) addInfiniteLoopProtection(program, globalIds, usedIdentifiers) @@ -625,7 +617,6 @@ async function transpileToSource( context, usedIdentifiers, { - checkImports: true, loadTabs: true, wrapModules: true } @@ -666,7 +657,7 @@ async function transpileToFullJS( ]) const globalIds = getNativeIds(program, usedIdentifiers) - Object.keys(globalIds).forEach(usedIdentifiers.add) + Object.keys(globalIds).forEach(id => usedIdentifiers.add(id)) if (!skipUndefined) checkForUndefinedVariables(program, usedIdentifiers) @@ -675,9 +666,8 @@ async function transpileToFullJS( context, usedIdentifiers, { - checkImports: false, loadTabs: true, - wrapModules: false + wrapModules: wrapSourceModules } ) diff --git a/src/transpiler/variableChecker.ts b/src/transpiler/variableChecker.ts index c29170858..07711fa87 100644 --- a/src/transpiler/variableChecker.ts +++ b/src/transpiler/variableChecker.ts @@ -2,70 +2,18 @@ import type * as es from 'estree' import { UndefinedVariable } from '../errors/errors' import assert from '../utils/assert' -import { recursive } from '../utils/walkers' - -function isDeclaration(node: es.Node): node is es.Declaration { - return ( - node.type === 'ClassDeclaration' || - node.type === 'FunctionDeclaration' || - node.type === 'VariableDeclaration' - ) -} - -function isModuleDeclaration(node: es.Node): node is es.ModuleDeclaration { - return [ - 'ExportAllDeclaration', - 'ExportNamedDeclaration', - 'ExportDefaultDeclaration', - 'ImportDeclaration' - ].includes(node.type) -} +import { extractIdsFromPattern } from '../utils/ast/astUtils' +import { + isDeclaration, + isFunctionNode, + isModuleDeclaration, + isPattern +} from '../utils/ast/typeGuards' function isModuleOrRegDeclaration(node: es.Node): node is es.ModuleDeclaration | es.Declaration { return isDeclaration(node) || isModuleDeclaration(node) } -function isPattern(node: es.Node): node is es.Pattern { - return [ - 'ArrayPattern', - 'AssignmentPattern', - 'Identifier', - 'MemberExpression', - 'ObjectPattern', - 'RestElement' - ].includes(node.type) -} - -function isFunctionNode( - node: es.Node -): node is es.ArrowFunctionExpression | es.FunctionDeclaration | es.FunctionExpression { - return ['ArrowFunctionExpression', 'FunctionExpression', 'FunctionDeclaration'].includes( - node.type - ) -} - -function extractIdsFromPattern(pattern: es.Pattern): Set { - const ids = new Set() - recursive(pattern, null, { - ArrayPattern: ({ elements }: es.ArrayPattern, _state, c) => - elements.forEach(elem => { - if (elem) c(elem, null) - }), - AssignmentPattern: (p: es.AssignmentPattern, _state, c) => { - c(p.left, null) - c(p.right, null) - }, - Identifier: (id: es.Identifier) => ids.add(id), - MemberExpression: () => { - throw new Error('MemberExpressions should not be used with extractIdsFromPattern') - }, - ObjectPattern: ({ properties }: es.ObjectPattern, _state, c) => - properties.forEach(prop => c(prop, null)), - RestElement: ({ argument }: es.RestElement, _state, c) => c(argument, null) - }) - return ids -} - function checkPattern(pattern: es.Pattern, identifiers: Set): void { extractIdsFromPattern(pattern).forEach(id => { if (!identifiers.has(id.name)) throw new UndefinedVariable(id.name, id) @@ -322,7 +270,7 @@ function checkStatement( // If the init clause declares variables, add them to the list of // local identifiers that the for statement should check const varDeclResult = checkVariableDeclaration(node.init, identifiers) - varDeclResult.forEach(localIdentifiers.add) + varDeclResult.forEach(id => localIdentifiers.add(id)) } else { checkExpression(node.init, localIdentifiers) } @@ -339,10 +287,10 @@ function checkStatement( const localIdentifiers = new Set(identifiers) if (node.left.type === 'VariableDeclaration') { const varDeclResult = checkVariableDeclaration(node.left, identifiers) - varDeclResult.forEach(localIdentifiers.add) + varDeclResult.forEach(id => localIdentifiers.add(id)) } checkExpression(node.right, localIdentifiers) - checkBody(node, localIdentifiers) + checkBody(node.body, localIdentifiers) break } case 'DoWhileStatement': @@ -431,7 +379,7 @@ export default function checkForUndefinedVariables( if (isModuleOrRegDeclaration(stmt)) { checkDeclaration(stmt, localIdentifiers).forEach(id => localIdentifiers.add(id)) } else if (stmt.type === 'BlockStatement') { - checkForUndefinedVariables(node, localIdentifiers) + checkForUndefinedVariables(stmt, localIdentifiers) } else { checkStatement(stmt, localIdentifiers) } From 15d937bc110b65a8262782c7dcb06cc655f0d580 Mon Sep 17 00:00:00 2001 From: leeyi45 Date: Thu, 4 May 2023 01:26:12 +0800 Subject: [PATCH 21/95] Fix ecEval not working with async --- src/ec-evaluator/interpreter.ts | 25 +++++++++++-------------- 1 file changed, 11 insertions(+), 14 deletions(-) diff --git a/src/ec-evaluator/interpreter.ts b/src/ec-evaluator/interpreter.ts index 2629a826e..c13b6d3ec 100644 --- a/src/ec-evaluator/interpreter.ts +++ b/src/ec-evaluator/interpreter.ts @@ -19,7 +19,7 @@ import { ImportTransformOptions } from '../modules/moduleTypes' import { transformImportNodesAsync } from '../modules/utils' import { checkEditorBreakpoints } from '../stdlib/inspector' import { Context, ContiguousArrayElements, Result, Value } from '../types' -import * as ast from '../utils/astCreator' +import * as ast from '../utils/ast/astCreator' import { evaluateBinaryExpression, evaluateUnaryExpression } from '../utils/operators' import * as rttc from '../utils/rttc' import * as instr from './instrCreator' @@ -141,7 +141,7 @@ export function resumeEvaluate(context: Context) { async function evaluateImports( program: es.Program, context: Context, - { loadTabs, checkImports, wrapModules }: ImportTransformOptions + { loadTabs, wrapModules }: ImportTransformOptions ) { const [importNodes, otherNodes] = partition( program.body, @@ -156,9 +156,7 @@ async function evaluateImports( importNodes, context, loadTabs, - checkImports, (name, node) => loadModuleBundleAsync(name, context, wrapModules, node), - (name, info) => Promise.resolve(new Set(Object.keys(info.content))), { ImportSpecifier: (spec: es.ImportSpecifier, info, node) => { declareIdentifier(context, spec.local.name, node, environment) @@ -220,16 +218,15 @@ async function evaluateImports( * @param value The value of ec evaluating the program. * @returns The corresponding promise. */ -export function ECEResultPromise(context: Context, value: Value): Promise { - return new Promise((resolve, reject) => { - if (value instanceof ECEBreak) { - resolve({ status: 'suspended-ec-eval', context }) - } else if (value instanceof ECError) { - resolve({ status: 'error' }) - } else { - resolve({ status: 'finished', context, value }) - } - }) +export async function ECEResultPromise(context: Context, promise: Promise): Promise { + const value = await promise + if (value instanceof ECEBreak) { + return { status: 'suspended-ec-eval', context } + } else if (value instanceof ECError) { + return { status: 'error' } + } else { + return { status: 'finished', context, value } + } } /** From 5232c96455741c29a4a3f835430e5ef08b39f322 Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Thu, 4 May 2023 01:39:22 +0800 Subject: [PATCH 22/95] Remove unnecessary import checking --- src/interpreter/interpreter.ts | 24 +++--------------------- 1 file changed, 3 insertions(+), 21 deletions(-) diff --git a/src/interpreter/interpreter.ts b/src/interpreter/interpreter.ts index 7eeb2da9b..3755e04be 100644 --- a/src/interpreter/interpreter.ts +++ b/src/interpreter/interpreter.ts @@ -6,18 +6,13 @@ import { UNKNOWN_LOCATION } from '../constants' import { LazyBuiltIn } from '../createContext' import * as errors from '../errors/errors' import { RuntimeSourceError } from '../errors/runtimeSourceError' -import { - UndefinedDefaultImportError, - UndefinedImportError, - UndefinedNamespaceImportError -} from '../modules/errors' import { loadModuleBundle } from '../modules/moduleLoader' import { ImportTransformOptions, ModuleFunctions } from '../modules/moduleTypes' import { initModuleContext } from '../modules/utils' import { checkEditorBreakpoints } from '../stdlib/inspector' import { Context, ContiguousArrayElements, Environment, Frame, Value, Variant } from '../types' -import * as create from '../utils/astCreator' -import { conditionalExpression, literal, primitive } from '../utils/astCreator' +import * as create from '../utils/ast/astCreator' +import { conditionalExpression, literal, primitive } from '../utils/ast/astCreator' import { evaluateBinaryExpression, evaluateUnaryExpression } from '../utils/operators' import * as rttc from '../utils/rttc' import Closure from './closure' @@ -717,7 +712,7 @@ function getNonEmptyEnv(environment: Environment): Environment { export function* evaluateProgram( program: es.Program, context: Context, - { checkImports, loadTabs, wrapModules }: ImportTransformOptions + { loadTabs, wrapModules }: ImportTransformOptions ) { yield* visit(context, program) @@ -748,32 +743,19 @@ export function* evaluateProgram( } const functions = moduleFunctions[moduleName] - const funcCount = Object.keys(functions).length for (const spec of node.specifiers) { declareIdentifier(context, spec.local.name, node) switch (spec.type) { case 'ImportSpecifier': { - if (checkImports && !(spec.imported.name in functions)) { - throw new UndefinedImportError(spec.imported.name, moduleName, spec) - } - defineVariable(context, spec.local.name, functions[spec.imported.name], true) break } case 'ImportDefaultSpecifier': { - if (checkImports && !('default' in functions)) { - throw new UndefinedDefaultImportError(moduleName, spec) - } - defineVariable(context, spec.local.name, functions['default'], true) break } case 'ImportNamespaceSpecifier': { - if (checkImports && funcCount === 0) { - throw new UndefinedNamespaceImportError(moduleName, spec) - } - defineVariable(context, spec.local.name, functions, true) break } From 8c9adbdcf01d6284e0ab0657a82002456f676056 Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Thu, 4 May 2023 01:41:59 +0800 Subject: [PATCH 23/95] Refactor AST utils --- src/ec-evaluator/utils.ts | 2 +- src/gpu/gpu.ts | 2 +- src/gpu/transfomer.ts | 2 +- src/infiniteLoops/instrument.ts | 3 +- src/infiniteLoops/runtime.ts | 2 +- src/infiniteLoops/state.ts | 2 +- src/infiniteLoops/symbolic.ts | 2 +- src/interpreter/closure.ts | 2 +- src/interpreter/interpreter-non-det.ts | 2 +- src/lazy/lazy.ts | 2 +- src/runner/__tests__/runners.ts | 2 +- src/runner/errors.ts | 2 +- src/runner/fullJSRunner.ts | 6 +-- src/runner/sourceRunner.ts | 20 +++++--- src/stepper/lib.ts | 2 +- src/stepper/stepper.ts | 2 +- src/utils/{ => ast}/astCreator.ts | 2 +- src/utils/ast/astUtils.ts | 22 ++++++++ src/utils/ast/typeGuards.ts | 71 ++++++++++++++++++++++++++ src/utils/operators.ts | 4 +- src/validator/__tests__/validator.ts | 2 +- src/validator/validator.ts | 2 +- src/vm/svml-compiler.ts | 2 +- src/vm/svml-machine.ts | 2 +- 24 files changed, 127 insertions(+), 35 deletions(-) rename src/utils/{ => ast}/astCreator.ts (99%) create mode 100644 src/utils/ast/astUtils.ts create mode 100644 src/utils/ast/typeGuards.ts diff --git a/src/ec-evaluator/utils.ts b/src/ec-evaluator/utils.ts index 23c6bbe56..6760fe9d8 100644 --- a/src/ec-evaluator/utils.ts +++ b/src/ec-evaluator/utils.ts @@ -6,7 +6,7 @@ import * as errors from '../errors/errors' import { RuntimeSourceError } from '../errors/runtimeSourceError' import Closure from '../interpreter/closure' import { Environment, Frame, Value } from '../types' -import * as ast from '../utils/astCreator' +import * as ast from '../utils/ast/astCreator' import * as instr from './instrCreator' import { Agenda } from './interpreter' import { AgendaItem, AppInstr, AssmtInstr, Instr, InstrType } from './types' diff --git a/src/gpu/gpu.ts b/src/gpu/gpu.ts index 73c4f39e2..663c317d3 100644 --- a/src/gpu/gpu.ts +++ b/src/gpu/gpu.ts @@ -1,6 +1,6 @@ import * as es from 'estree' -import * as create from '../utils/astCreator' +import * as create from '../utils/ast/astCreator' import { getIdentifiersInProgram } from '../utils/uniqueIds' import GPUTransformer from './transfomer' diff --git a/src/gpu/transfomer.ts b/src/gpu/transfomer.ts index 8a9d39d2d..c64f0460a 100644 --- a/src/gpu/transfomer.ts +++ b/src/gpu/transfomer.ts @@ -1,6 +1,6 @@ import * as es from 'estree' -import * as create from '../utils/astCreator' +import * as create from '../utils/ast/astCreator' import { ancestor, make, simple } from '../utils/walkers' import GPUBodyVerifier from './verification/bodyVerifier' import GPULoopVerifier from './verification/loopVerifier' diff --git a/src/infiniteLoops/instrument.ts b/src/infiniteLoops/instrument.ts index bb75761d5..59fe85ac2 100644 --- a/src/infiniteLoops/instrument.ts +++ b/src/infiniteLoops/instrument.ts @@ -2,7 +2,7 @@ import { generate } from 'astring' import * as es from 'estree' import { transformImportDeclarations } from '../transpiler/transpiler' -import * as create from '../utils/astCreator' +import * as create from '../utils/ast/astCreator' import { recursive, simple, WalkerCallback } from '../utils/walkers' // transforms AST of program @@ -582,7 +582,6 @@ async function handleImports(programs: es.Program[]): Promise<[string, string[]] null, new Set(), { - checkImports: false, loadTabs: false, wrapModules: false } diff --git a/src/infiniteLoops/runtime.ts b/src/infiniteLoops/runtime.ts index 83783e251..d85ec3406 100644 --- a/src/infiniteLoops/runtime.ts +++ b/src/infiniteLoops/runtime.ts @@ -6,7 +6,7 @@ import { getRequireProvider } from '../modules/requireProvider' import { parse } from '../parser/parser' import * as stdList from '../stdlib/list' import { Chapter, Variant } from '../types' -import * as create from '../utils/astCreator' +import * as create from '../utils/ast/astCreator' import { checkForInfiniteLoop } from './detect' import { InfiniteLoopError } from './errors' import { diff --git a/src/infiniteLoops/state.ts b/src/infiniteLoops/state.ts index b2ff7fff6..b32918311 100644 --- a/src/infiniteLoops/state.ts +++ b/src/infiniteLoops/state.ts @@ -1,7 +1,7 @@ import { generate } from 'astring' import * as es from 'estree' -import { identifier } from '../utils/astCreator' +import { identifier } from '../utils/ast/astCreator' import * as sym from './symbolic' // Object + functions called during runtime to check for infinite loops diff --git a/src/infiniteLoops/symbolic.ts b/src/infiniteLoops/symbolic.ts index 89e3449cd..07d580b66 100644 --- a/src/infiniteLoops/symbolic.ts +++ b/src/infiniteLoops/symbolic.ts @@ -1,6 +1,6 @@ import * as es from 'estree' -import * as create from '../utils/astCreator' +import * as create from '../utils/ast/astCreator' import { evaluateBinaryExpression, evaluateUnaryExpression } from '../utils/operators' // data structure for symbolic + hybrid values diff --git a/src/interpreter/closure.ts b/src/interpreter/closure.ts index 9519c3140..954a81aab 100644 --- a/src/interpreter/closure.ts +++ b/src/interpreter/closure.ts @@ -8,7 +8,7 @@ import { callExpression, identifier, returnStatement -} from '../utils/astCreator' +} from '../utils/ast/astCreator' import { dummyLocation } from '../utils/dummyAstCreator' import { apply } from './interpreter' diff --git a/src/interpreter/interpreter-non-det.ts b/src/interpreter/interpreter-non-det.ts index 570566d3f..faf61b0f1 100644 --- a/src/interpreter/interpreter-non-det.ts +++ b/src/interpreter/interpreter-non-det.ts @@ -6,7 +6,7 @@ import { CUT, UNKNOWN_LOCATION } from '../constants' import * as errors from '../errors/errors' import { RuntimeSourceError } from '../errors/runtimeSourceError' import { Context, Environment, Frame, Value } from '../types' -import { conditionalExpression, literal, primitive } from '../utils/astCreator' +import { conditionalExpression, literal, primitive } from '../utils/ast/astCreator' import { evaluateBinaryExpression, evaluateUnaryExpression } from '../utils/operators' import * as rttc from '../utils/rttc' import Closure from './closure' diff --git a/src/lazy/lazy.ts b/src/lazy/lazy.ts index 6dedcf419..8d02437ef 100644 --- a/src/lazy/lazy.ts +++ b/src/lazy/lazy.ts @@ -1,6 +1,6 @@ import * as es from 'estree' -import * as create from '../utils/astCreator' +import * as create from '../utils/ast/astCreator' import { getIdentifiersInProgram } from '../utils/uniqueIds' import { simple } from '../utils/walkers' diff --git a/src/runner/__tests__/runners.ts b/src/runner/__tests__/runners.ts index 5e698fb7b..a20b709ae 100644 --- a/src/runner/__tests__/runners.ts +++ b/src/runner/__tests__/runners.ts @@ -3,7 +3,7 @@ import { UndefinedVariable } from '../../errors/errors' import { mockContext } from '../../mocks/context' import { FatalSyntaxError } from '../../parser/errors' import { Chapter, Finished, Variant } from '../../types' -import { locationDummyNode } from '../../utils/astCreator' +import { locationDummyNode } from '../../utils/ast/astCreator' import { CodeSnippetTestCase } from '../../utils/testing' import { htmlErrorHandlingScript } from '../htmlRunner' diff --git a/src/runner/errors.ts b/src/runner/errors.ts index 4f5b2308c..6c1844582 100644 --- a/src/runner/errors.ts +++ b/src/runner/errors.ts @@ -3,7 +3,7 @@ import { NullableMappedPosition, RawSourceMap, SourceMapConsumer } from 'source- import { UNKNOWN_LOCATION } from '../constants' import { ConstAssignment, ExceptionError, UndefinedVariable } from '../errors/errors' import { SourceError } from '../types' -import { locationDummyNode } from '../utils/astCreator' +import { locationDummyNode } from '../utils/ast/astCreator' enum BrowserType { Chrome = 'Chrome', diff --git a/src/runner/fullJSRunner.ts b/src/runner/fullJSRunner.ts index 8a34daeb6..946894abd 100644 --- a/src/runner/fullJSRunner.ts +++ b/src/runner/fullJSRunner.ts @@ -6,12 +6,11 @@ import { RawSourceMap } from 'source-map' import { IOptions, Result } from '..' import { NATIVE_STORAGE_ID } from '../constants' import { RuntimeSourceError } from '../errors/runtimeSourceError' -import { hoistAndMergeImports } from '../localImports/transformers/hoistAndMergeImports' import { getRequireProvider, RequireProvider } from '../modules/requireProvider' import { parse } from '../parser/parser' import { evallerReplacer, getBuiltins, transpile } from '../transpiler/transpiler' import type { Context, NativeStorage } from '../types' -import * as create from '../utils/astCreator' +import * as create from '../utils/ast/astCreator' import { toSourceError } from './errors' import { resolvedErrorPromise } from './utils' @@ -60,9 +59,6 @@ export async function fullJSRunner( ? [] : [...getBuiltins(context.nativeStorage), ...prelude] - // modules - hoistAndMergeImports(program) - // evaluate and create a separate block for preludes and builtins const preEvalProgram: es.Program = create.program([ ...preludeAndBuiltins, diff --git a/src/runner/sourceRunner.ts b/src/runner/sourceRunner.ts index 1c2e51357..d2bc08b11 100644 --- a/src/runner/sourceRunner.ts +++ b/src/runner/sourceRunner.ts @@ -50,7 +50,6 @@ const DEFAULT_SOURCE_OPTIONS: IOptions = { throwInfiniteLoops: true, importOptions: { loadTabs: true, - checkImports: true, wrapModules: true } } @@ -153,7 +152,7 @@ async function runNative( } ;({ transpiled, sourceMapJson } = await transpile(transpiledProgram, context)) - console.log(transpiled) + // console.log(transpiled) let value = await sandboxedEval(transpiled, getRequireProvider(context), context.nativeStorage) if (context.variant === Variant.LAZY) { @@ -308,11 +307,16 @@ export async function sourceFilesRunner( context.shouldIncreaseEvaluationTimeout = _.isEqual(previousCode, currentCode) previousCode = currentCode - const preprocessedProgram = await preprocessFileImports(files, entrypointFilePath, context) - if (!preprocessedProgram) { - return resolvedErrorPromise - } - context.previousPrograms.unshift(preprocessedProgram) + try { + const preprocessedProgram = await preprocessFileImports(files, entrypointFilePath, context) + if (!preprocessedProgram) { + return resolvedErrorPromise + } + context.previousPrograms.unshift(preprocessedProgram) - return sourceRunner(preprocessedProgram, context, isVerboseErrorsEnabled, options) + return sourceRunner(preprocessedProgram, context, isVerboseErrorsEnabled, options) + } catch (error) { + console.log(error) + throw error + } } diff --git a/src/stepper/lib.ts b/src/stepper/lib.ts index 741bbac17..7495f9c49 100644 --- a/src/stepper/lib.ts +++ b/src/stepper/lib.ts @@ -2,7 +2,7 @@ import * as es from 'estree' import * as misc from '../stdlib/misc' import { substituterNodes } from '../types' -import * as ast from '../utils/astCreator' +import * as ast from '../utils/ast/astCreator' import { nodeToValue, valueToExpression } from './converter' import { codify } from './stepper' import { isBuiltinFunction, isNumber } from './util' diff --git a/src/stepper/stepper.ts b/src/stepper/stepper.ts index 5fba42e83..8ef1d8303 100644 --- a/src/stepper/stepper.ts +++ b/src/stepper/stepper.ts @@ -11,7 +11,7 @@ import { FunctionDeclarationExpression, substituterNodes } from '../types' -import * as ast from '../utils/astCreator' +import * as ast from '../utils/ast/astCreator' import { dummyBlockExpression, dummyBlockStatement, diff --git a/src/utils/astCreator.ts b/src/utils/ast/astCreator.ts similarity index 99% rename from src/utils/astCreator.ts rename to src/utils/ast/astCreator.ts index 78f3e3761..0e21cd776 100644 --- a/src/utils/astCreator.ts +++ b/src/utils/ast/astCreator.ts @@ -1,6 +1,6 @@ import * as es from 'estree' -import { AllowedDeclarations, BlockExpression, FunctionDeclarationExpression } from '../types' +import { AllowedDeclarations, BlockExpression, FunctionDeclarationExpression } from '../../types' export const getVariableDecarationName = (decl: es.VariableDeclaration) => (decl.declarations[0].id as es.Identifier).name diff --git a/src/utils/ast/astUtils.ts b/src/utils/ast/astUtils.ts new file mode 100644 index 000000000..4c52d53fe --- /dev/null +++ b/src/utils/ast/astUtils.ts @@ -0,0 +1,22 @@ +import type * as es from 'estree' + +import { recursive } from '../walkers' + +export function extractIdsFromPattern(pattern: es.Pattern): Set { + const ids = new Set() + recursive(pattern, null, { + ArrayPattern: ({ elements }: es.ArrayPattern, _state, c) => + elements.forEach(elem => { + if (elem) c(elem, null) + }), + AssignmentPattern: (p: es.AssignmentPattern, _state, c) => { + c(p.left, null) + c(p.right, null) + }, + Identifier: (id: es.Identifier) => ids.add(id), + ObjectPattern: ({ properties }: es.ObjectPattern, _state, c) => + properties.forEach(prop => c(prop, null)), + RestElement: ({ argument }: es.RestElement, _state, c) => c(argument, null) + }) + return ids +} diff --git a/src/utils/ast/typeGuards.ts b/src/utils/ast/typeGuards.ts new file mode 100644 index 000000000..291b5f117 --- /dev/null +++ b/src/utils/ast/typeGuards.ts @@ -0,0 +1,71 @@ +import type es from 'estree' + +// It is necessary to write this type guard like this as the 'type' of both +// 'Directive' & 'ExpressionStatement' is 'ExpressionStatement'. +// +// export interface Directive extends BaseNode { +// type: "ExpressionStatement"; +// expression: Literal; +// directive: string; +// } +// +// export interface ExpressionStatement extends BaseStatement { +// type: "ExpressionStatement"; +// expression: Expression; +// } +// +// As such, we check whether the 'directive' property exists on the object +// instead in order to differentiate between the two. +export const isDirective = (node: es.Node): node is es.Directive => { + return 'directive' in node +} + +export const isModuleDeclaration = (node: es.Node): node is es.ModuleDeclaration => { + return [ + 'ImportDeclaration', + 'ExportNamedDeclaration', + 'ExportDefaultDeclaration', + 'ExportAllDeclaration' + ].includes(node.type) +} + +export const isStatement = ( + node: es.Directive | es.Statement | es.ModuleDeclaration +): node is es.Statement => { + return !isDirective(node) && !isModuleDeclaration(node) +} + +export function isDeclaration(node: es.Node): node is es.Declaration { + // export type Declaration = + // FunctionDeclaration | VariableDeclaration | ClassDeclaration; + return ( + node.type === 'VariableDeclaration' || + node.type === 'FunctionDeclaration' || + node.type === 'ClassDeclaration' + ) +} + +export function isImportDeclaration(node: es.Node): node is es.ImportDeclaration { + return node.type === 'ImportDeclaration' +} + +export const isSourceImport = (url: string) => !url.startsWith('.') && !url.startsWith('/') + +export function isPattern(node: es.Node): node is es.Pattern { + return [ + 'ArrayPattern', + 'AssignmentPattern', + 'Identifier', + 'MemberExpression', + 'ObjectPattern', + 'RestElement' + ].includes(node.type) +} + +export function isFunctionNode( + node: es.Node +): node is es.ArrowFunctionExpression | es.FunctionDeclaration | es.FunctionExpression { + return ['ArrowFunctionExpression', 'FunctionExpression', 'FunctionDeclaration'].includes( + node.type + ) +} diff --git a/src/utils/operators.ts b/src/utils/operators.ts index 321ee281e..eaadb8b30 100644 --- a/src/utils/operators.ts +++ b/src/utils/operators.ts @@ -15,8 +15,8 @@ import { import { ModuleBundle, ModuleFunctions } from '../modules/moduleTypes' import { RequireProvider } from '../modules/requireProvider' import { Chapter, NativeStorage, Thunk } from '../types' -import { callExpression, locationDummyNode } from './astCreator' -import * as create from './astCreator' +import { callExpression, locationDummyNode } from './ast/astCreator' +import * as create from './ast/astCreator' import { makeWrapper } from './makeWrapper' import * as rttc from './rttc' diff --git a/src/validator/__tests__/validator.ts b/src/validator/__tests__/validator.ts index ac3ca5092..bc9a8880e 100644 --- a/src/validator/__tests__/validator.ts +++ b/src/validator/__tests__/validator.ts @@ -3,7 +3,7 @@ import * as es from 'estree' import { mockContext } from '../../mocks/context' import { parse } from '../../parser/parser' import { Chapter, NodeWithInferredType } from '../../types' -import { getVariableDecarationName } from '../../utils/astCreator' +import { getVariableDecarationName } from '../../utils/ast/astCreator' import { stripIndent } from '../../utils/formatters' import { expectParsedError } from '../../utils/testing' import { simple } from '../../utils/walkers' diff --git a/src/validator/validator.ts b/src/validator/validator.ts index 7892e75f0..67f1db938 100644 --- a/src/validator/validator.ts +++ b/src/validator/validator.ts @@ -3,7 +3,7 @@ import * as es from 'estree' import { ConstAssignment } from '../errors/errors' import { NoAssignmentToForVariable } from '../errors/validityErrors' import { Context, NodeWithInferredType } from '../types' -import { getVariableDecarationName } from '../utils/astCreator' +import { getVariableDecarationName } from '../utils/ast/astCreator' import { ancestor, base, FullWalkerCallback } from '../utils/walkers' class Declaration { diff --git a/src/vm/svml-compiler.ts b/src/vm/svml-compiler.ts index ed791bf4d..fa0addfd8 100644 --- a/src/vm/svml-compiler.ts +++ b/src/vm/svml-compiler.ts @@ -11,7 +11,7 @@ import { vmPrelude } from '../stdlib/vm.prelude' import { Context, ContiguousArrayElements } from '../types' -import * as create from '../utils/astCreator' +import * as create from '../utils/ast/astCreator' import { recursive, simple } from '../utils/walkers' import OpCodes from './opcodes' diff --git a/src/vm/svml-machine.ts b/src/vm/svml-machine.ts index 064126ff5..370f4eec1 100644 --- a/src/vm/svml-machine.ts +++ b/src/vm/svml-machine.ts @@ -9,7 +9,7 @@ import { VARARGS_NUM_ARGS } from '../stdlib/vm.prelude' import { Context } from '../types' -import { locationDummyNode } from '../utils/astCreator' +import { locationDummyNode } from '../utils/ast/astCreator' import { stringify } from '../utils/stringify' import OpCodes from './opcodes' import { Address, Instruction, Program, SVMFunction } from './svml-compiler' From cc14d4b94af9979a17b7fd56329fc768eb74dc58 Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Thu, 4 May 2023 01:43:59 +0800 Subject: [PATCH 24/95] Temporary fix for parsers not respecting throwOnError --- src/parser/source/index.ts | 11 +++++++---- src/parser/source/typed/index.ts | 11 +++++++++-- 2 files changed, 16 insertions(+), 6 deletions(-) diff --git a/src/parser/source/index.ts b/src/parser/source/index.ts index 5ccf8c1d8..4006527bc 100644 --- a/src/parser/source/index.ts +++ b/src/parser/source/index.ts @@ -42,10 +42,12 @@ export class SourceParser implements Parser { throwOnError?: boolean ): Program | null { try { - return acornParse( + const value = acornParse( programStr, - createAcornParserOptions(DEFAULT_ECMA_VERSION, context.errors, options) + createAcornParserOptions(DEFAULT_ECMA_VERSION, context.errors, options, throwOnError) ) as unknown as Program + + return value } catch (error) { if (error instanceof SyntaxError) { error = new FatalSyntaxError( @@ -53,7 +55,6 @@ export class SourceParser implements Parser { error.toString() ) } - if (throwOnError) throw error context.errors.push(error) } @@ -84,7 +85,9 @@ export class SourceParser implements Parser { ) => { const errors: SourceError[] = checker(node, ancestors) - if (throwOnError && errors.length > 0) throw errors[0] + if (throwOnError && errors.length > 0) { + throw errors[0] + } errors.forEach(e => context.errors.push(e)) } if (validationWalkers.has(syntaxNodeName)) { diff --git a/src/parser/source/typed/index.ts b/src/parser/source/typed/index.ts index 5dbf5ebc9..02ab60779 100644 --- a/src/parser/source/typed/index.ts +++ b/src/parser/source/typed/index.ts @@ -28,7 +28,7 @@ export class SourceTypedParser extends SourceParser { try { TypeParser.parse( programStr, - createAcornParserOptions(DEFAULT_ECMA_VERSION, context.errors, options) + createAcornParserOptions(DEFAULT_ECMA_VERSION, context.errors, options, throwOnError) ) } catch (error) { if (error instanceof SyntaxError) { @@ -40,6 +40,7 @@ export class SourceTypedParser extends SourceParser { if (throwOnError) throw error context.errors.push(error) + return null } @@ -48,7 +49,7 @@ export class SourceTypedParser extends SourceParser { const ast = babelParse(programStr, { ...defaultBabelOptions, sourceFilename: options?.sourceFile, - errorRecovery: throwOnError ?? true + errorRecovery: !throwOnError }) if (ast.errors.length) { @@ -66,8 +67,14 @@ export class SourceTypedParser extends SourceParser { return null } + // TODO typed parser should be throwing on error const typedProgram: TypedES.Program = ast.program as TypedES.Program const typedCheckedProgram: Program = checkForTypeErrors(typedProgram, context) + + if (context.errors.length > 0 && throwOnError) { + throw context.errors[0] + } + transformBabelASTToESTreeCompliantAST(typedCheckedProgram) return typedCheckedProgram From 6b79c0146e3deb907b8d5569a8c292f6075558b5 Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Thu, 4 May 2023 04:20:49 +0800 Subject: [PATCH 25/95] Fix broken tests --- jest.setup.ts | 8 + package.json | 1 + src/__tests__/environment.ts | 1 - .../__tests__/ec-evaluator-errors.ts | 36 ---- src/ec-evaluator/__tests__/ec-evaluator.ts | 40 ----- .../__snapshots__/interpreter-errors.ts.snap | 13 ++ .../__tests__/interpreter-errors.ts | 18 -- .../__snapshots__/preprocessor.ts.snap | 44 +++++ src/localImports/__tests__/preprocessor.ts | 159 ++++++++++-------- .../hoistAndMergeImports.ts.snap | 21 +++ .../transformers/hoistAndMergeImports.ts | 66 +++++--- .../__tests__/transformers/removeExports.ts | 159 ------------------ src/modules/__mocks__/moduleLoader.ts | 15 ++ src/modules/__mocks__/moduleLoaderAsync.ts | 26 +++ src/modules/__tests__/moduleLoader.ts | 4 +- .../__snapshots__/allowed-syntax.ts.snap | 102 ++++++++++- src/parser/__tests__/allowed-syntax.ts | 2 +- .../__tests__/source1Typed.test.ts | 14 +- src/vm/__tests__/svml-compiler.ts | 4 +- tsconfig.json | 3 + 20 files changed, 373 insertions(+), 363 deletions(-) create mode 100644 jest.setup.ts create mode 100644 src/localImports/__tests__/__snapshots__/preprocessor.ts.snap create mode 100644 src/localImports/__tests__/transformers/__snapshots__/hoistAndMergeImports.ts.snap delete mode 100644 src/localImports/__tests__/transformers/removeExports.ts create mode 100644 src/modules/__mocks__/moduleLoader.ts create mode 100644 src/modules/__mocks__/moduleLoaderAsync.ts diff --git a/jest.setup.ts b/jest.setup.ts new file mode 100644 index 000000000..584873dad --- /dev/null +++ b/jest.setup.ts @@ -0,0 +1,8 @@ +jest.mock('lodash', () => ({ + ...jest.requireActual('lodash'), + memoize: jest.fn((x: any) => x), +})) + + +jest.mock('./src/modules/moduleLoaderAsync') +jest.mock('./src/modules/moduleLoader') \ No newline at end of file diff --git a/package.json b/package.json index 9bc3f760b..80556741c 100644 --- a/package.json +++ b/package.json @@ -96,6 +96,7 @@ "ts", "js" ], + "setupFilesAfterEnv": ["/jest.setup.ts"], "transform": { "\\.ts$": "ts-jest", "\\.js$": "babel-jest" diff --git a/src/__tests__/environment.ts b/src/__tests__/environment.ts index c0e43bbb2..a86a389d2 100644 --- a/src/__tests__/environment.ts +++ b/src/__tests__/environment.ts @@ -20,7 +20,6 @@ test('Function params and body identifiers are in different environment', () => const parsed = parse(code, context) const it = evaluate(parsed as any as Program, context, { loadTabs: false, - checkImports: false, wrapModules: false }) const stepsToComment = 13 // manually counted magic number diff --git a/src/ec-evaluator/__tests__/ec-evaluator-errors.ts b/src/ec-evaluator/__tests__/ec-evaluator-errors.ts index 56a633cee..a155d388e 100644 --- a/src/ec-evaluator/__tests__/ec-evaluator-errors.ts +++ b/src/ec-evaluator/__tests__/ec-evaluator-errors.ts @@ -1,6 +1,4 @@ /* tslint:disable:max-line-length */ -import * as moduleLoader from '../../modules/moduleLoaderAsync' -import * as moduleUtils from '../../modules/utils' import { Chapter, Variant } from '../../types' import { stripIndent } from '../../utils/formatters' import { @@ -10,31 +8,6 @@ import { expectResult } from '../../utils/testing' -jest.mock('lodash', () => ({ - ...jest.requireActual('lodash'), - memoize: jest.fn(f => f) -})) - -jest.spyOn(moduleLoader, 'memoizedGetModuleManifestAsync').mockResolvedValue({ - one_module: { tabs: [] }, - another_module: { tabs: [] } -}) -jest.spyOn(moduleLoader, 'memoizedGetModuleBundleAsync').mockResolvedValue(` - require => ({ - foo: () => 'foo', - bar: () => 'bar' - }) -`) -jest.spyOn(moduleLoader, 'memoizedGetModuleDocsAsync').mockResolvedValue({ - foo: 'foo', - bar: 'bar' -}) - -jest.spyOn(moduleUtils, 'initModuleContextAsync').mockImplementation(() => { - console.log('called') - return Promise.resolve() -}) - const undefinedVariable = stripIndent` im_undefined; ` @@ -1027,12 +1000,3 @@ test('Shadowed variables may not be assigned to until declared in the current sc optionEC3 ).toMatchInlineSnapshot(`"Line 3: Name variable not declared."`) }) - -test('Importing unknown variables throws UndefinedImport error', () => { - return expectParsedError( - stripIndent` - import { foo1 } from 'one_module'; - `, - optionEC - ).toMatchInlineSnapshot("\"'one_module' does not contain a definition for 'foo1'\"") -}) diff --git a/src/ec-evaluator/__tests__/ec-evaluator.ts b/src/ec-evaluator/__tests__/ec-evaluator.ts index da809d55f..239c7c053 100644 --- a/src/ec-evaluator/__tests__/ec-evaluator.ts +++ b/src/ec-evaluator/__tests__/ec-evaluator.ts @@ -2,23 +2,6 @@ import { Chapter, Variant } from '../../types' import { stripIndent } from '../../utils/formatters' import { expectResult } from '../../utils/testing' -// jest.mock('lodash', () => ({ -// ...jest.requireActual('lodash'), -// memoize: jest.fn(func => func) -// })) - -const mockXMLHttpRequest = (xhr: Partial = {}) => { - const xhrMock: Partial = { - open: jest.fn(() => {}), - send: jest.fn(() => {}), - status: 200, - responseText: 'Hello World!', - ...xhr - } - jest.spyOn(window, 'XMLHttpRequest').mockImplementationOnce(() => xhrMock as XMLHttpRequest) - return xhrMock -} - const optionEC = { variant: Variant.EXPLICIT_CONTROL } const optionEC3 = { chapter: Chapter.SOURCE_3, variant: Variant.EXPLICIT_CONTROL } const optionEC4 = { chapter: Chapter.SOURCE_4, variant: Variant.EXPLICIT_CONTROL } @@ -316,29 +299,6 @@ test('streams can be created and functions with no return statements are still e }) test('Imports are properly handled', () => { - // for getModuleFile - mockXMLHttpRequest({ - responseText: `{ - "one_module": { - "tabs": [] - }, - "another_module": { - "tabs": [] - } - }` - }) - - // for bundle body - mockXMLHttpRequest({ - responseText: ` - require => { - return { - foo: () => 'foo', - } - } - ` - }) - return expectResult( stripIndent` import { foo } from 'one_module'; diff --git a/src/interpreter/__tests__/__snapshots__/interpreter-errors.ts.snap b/src/interpreter/__tests__/__snapshots__/interpreter-errors.ts.snap index 4f232772a..b64389a46 100644 --- a/src/interpreter/__tests__/__snapshots__/interpreter-errors.ts.snap +++ b/src/interpreter/__tests__/__snapshots__/interpreter-errors.ts.snap @@ -849,6 +849,19 @@ Object { } `; +exports[`Importing unknown variables throws error: expectParsedError 1`] = ` +Object { + "alertResult": Array [], + "code": "import { foo1 } from 'one_module';", + "displayResult": Array [], + "numErrors": 1, + "parsedErrors": "Unable to get modules.", + "result": undefined, + "resultStatus": "error", + "visualiseListResult": Array [], +} +`; + exports[`Nice errors when errors occur inside builtins: expectParsedError 1`] = ` Object { "alertResult": Array [], diff --git a/src/interpreter/__tests__/interpreter-errors.ts b/src/interpreter/__tests__/interpreter-errors.ts index 3319dabaf..23690d8bc 100644 --- a/src/interpreter/__tests__/interpreter-errors.ts +++ b/src/interpreter/__tests__/interpreter-errors.ts @@ -11,24 +11,6 @@ import { expectResult } from '../../utils/testing' -jest.mock('../../modules/moduleLoader', () => ({ - ...jest.requireActual('../../modules/moduleLoader'), - memoizedGetModuleFile: jest.fn().mockReturnValue(`function() { - return { - foo: () => undefined, - bar: () => undefined, - } - }`), - memoizedGetModuleManifest: jest.fn().mockReturnValue({ - one_module: { - tabs: [] - }, - another_module: { - tabs: [] - } - }) -})) - // const asMock = (func: T) => func as MockedFunction // const mockedModuleFile = asMock(memoizedGetModuleFile) diff --git a/src/localImports/__tests__/__snapshots__/preprocessor.ts.snap b/src/localImports/__tests__/__snapshots__/preprocessor.ts.snap new file mode 100644 index 000000000..215bf9acb --- /dev/null +++ b/src/localImports/__tests__/__snapshots__/preprocessor.ts.snap @@ -0,0 +1,44 @@ +// Jest Snapshot v1, https://goo.gl/fbAQLP + +exports[`preprocessFileImports collates Source module imports at the start of the top-level environment of the preprocessed program 1`] = ` +"import {w, x, y, z} from \\"one_module\\"; +import {f, g} from \\"other_module\\"; +import {h} from \\"another_module\\"; +import {w, x, y, z} from \\"one_module\\"; +import {f, g} from \\"other_module\\"; +import {h} from \\"another_module\\"; +function __$b$$dot$$js__(___$c$$dot$$js___) { + const square = __access_export__(___$c$$dot$$js___, \\"square\\"); + const b = square(5); + return pair(null, list(pair(\\"b\\", b))); +} +function __$c$$dot$$js__() { + const square = x => x * x; + return pair(null, list(pair(\\"square\\", square))); +} +const ___$c$$dot$$js___ = __$c$$dot$$js__(); +const ___$b$$dot$$js___ = __$b$$dot$$js__(___$c$$dot$$js___); +const b = __access_export__(___$b$$dot$$js___, \\"b\\"); +b; +" +`; + +exports[`preprocessFileImports ignores Source module imports & removes all non-Source module import-related AST nodes in the preprocessed program 1`] = ` +"import d, {a, b, c} from \\"one_module\\"; +import d, {a, b, c} from \\"one_module\\"; +function __$not$$dash$$source$$dash$$module$$dot$$js__() { + const x = 1; + const y = 2; + const z = 3; + function square(x) { + return x * x; + } + return pair(square, list(pair(\\"x\\", x), pair(\\"y\\", y), pair(\\"z\\", z))); +} +const ___$not$$dash$$source$$dash$$module$$dot$$js___ = __$not$$dash$$source$$dash$$module$$dot$$js__(); +const w = __access_export__(___$not$$dash$$source$$dash$$module$$dot$$js___, \\"default\\"); +const x = __access_export__(___$not$$dash$$source$$dash$$module$$dot$$js___, \\"x\\"); +const y = __access_export__(___$not$$dash$$source$$dash$$module$$dot$$js___, \\"y\\"); +const z = __access_export__(___$not$$dash$$source$$dash$$module$$dot$$js___, \\"z\\"); +" +`; diff --git a/src/localImports/__tests__/preprocessor.ts b/src/localImports/__tests__/preprocessor.ts index 685850345..ef17a0cf9 100644 --- a/src/localImports/__tests__/preprocessor.ts +++ b/src/localImports/__tests__/preprocessor.ts @@ -1,13 +1,18 @@ -import es from 'estree' - import { parseError } from '../../index' import { mockContext } from '../../mocks/context' -import { parse } from '../../parser/parser' import { accessExportFunctionName, defaultExportLookupName } from '../../stdlib/localImport.prelude' import { Chapter } from '../../types' -import preprocessFileImports, { getImportedLocalModulePaths } from '../preprocessor' +import preprocessFileImports from '../preprocessor' import { parseCodeError, stripLocationInfo } from './utils' +import hoistAndMergeImports from '../transformers/hoistAndMergeImports' +import { generate } from 'astring' +import { Program } from 'estree' +import { parse } from '../../parser/parser' +// The preprocessor now checks for the existence of source modules +// so this is here to solve that issue + +/* describe('getImportedLocalModulePaths', () => { let context = mockContext(Chapter.LIBRARY_PARSER) @@ -78,6 +83,7 @@ describe('getImportedLocalModulePaths', () => { assertCorrectModulePathsAreReturned(code, '/dir/a.js', ['/dir/b.js', '/dir/c.js']) }) }) +*/ describe('preprocessFileImports', () => { let actualContext = mockContext(Chapter.LIBRARY_PARSER) @@ -89,11 +95,13 @@ describe('preprocessFileImports', () => { }) const assertASTsAreEquivalent = ( - actualProgram: es.Program | undefined, + actualProgram: Program | undefined, expectedCode: string ): void => { - if (actualProgram === undefined) { - throw parseCodeError + // assert(actualProgram !== undefined, 'Actual program should not be undefined') + if (!actualProgram) { + // console.log(actualContext.errors[0], 'occurred at:', actualContext.errors[0].location.start) + throw new Error('Actual program should not be undefined!') } const expectedProgram = parse(expectedCode, expectedContext) @@ -104,6 +112,17 @@ describe('preprocessFileImports', () => { expect(stripLocationInfo(actualProgram)).toEqual(stripLocationInfo(expectedProgram)) } + const testAgainstSnapshot = (program: Program | undefined | null) => { + if (!program) { + throw parseCodeError + } + + program.body = [...hoistAndMergeImports([program]), ...program.body] + + expect(generate(program)) + .toMatchSnapshot() + } + it('returns undefined if the entrypoint file does not exist', async () => { const files: Record = { '/a.js': '1 + 2;' @@ -158,7 +177,7 @@ describe('preprocessFileImports', () => { it('ignores Source module imports & removes all non-Source module import-related AST nodes in the preprocessed program', async () => { const files: Record = { '/a.js': ` - import d, { a, b, c } from "source-module"; + import d, { a, b, c } from "one_module"; import w, { x, y, z } from "./not-source-module.js"; `, '/not-source-module.js': ` @@ -170,84 +189,90 @@ describe('preprocessFileImports', () => { } ` } - const expectedCode = ` - import { a, b, c } from "source-module"; - - function __$not$$dash$$source$$dash$$module$$dot$$js__() { - const x = 1; - const y = 2; - const z = 3; - function square(x) { - return x * x; - } - - return pair(square, list(pair("x", x), pair("y", y), pair("z", z))); - } - - const ___$not$$dash$$source$$dash$$module$$dot$$js___ = __$not$$dash$$source$$dash$$module$$dot$$js__(); - - const w = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "${defaultExportLookupName}"); - const x = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "x"); - const y = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "y"); - const z = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "z"); - ` - const actualProgram = await preprocessFileImports(files, '/a.js', actualContext) - assertASTsAreEquivalent(actualProgram, expectedCode) + // const expectedCode = ` + // import { a, b, c } from "one_module"; + + // function __$not$$dash$$source$$dash$$module$$dot$$js__() { + // const x = 1; + // const y = 2; + // const z = 3; + // function square(x) { + // return x * x; + // } + + // return pair(square, list(pair("x", x), pair("y", y), pair("z", z))); + // } + + // const ___$not$$dash$$source$$dash$$module$$dot$$js___ = __$not$$dash$$source$$dash$$module$$dot$$js__(); + + // const w = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "${defaultExportLookupName}"); + // const x = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "x"); + // const y = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "y"); + // const z = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "z"); + // ` + const actualProgram = await preprocessFileImports(files, '/a.js', actualContext, { + allowUndefinedImports: true + }) + testAgainstSnapshot(actualProgram) + // assertASTsAreEquivalent(actualProgram, expectedCode) }) it('collates Source module imports at the start of the top-level environment of the preprocessed program', async () => { const files: Record = { '/a.js': ` import { b } from "./b.js"; - import { w, x } from "source-module"; - import { f, g } from "other-source-module"; + import { w, x } from "one_module"; + import { f, g } from "other_module"; b; `, '/b.js': ` import { square } from "./c.js"; - import { x, y } from "source-module"; - import { h } from "another-source-module"; + import { x, y } from "one_module"; + import { h } from "another_module"; export const b = square(5); `, '/c.js': ` - import { x, y, z } from "source-module"; + import { x, y, z } from "one_module"; export const square = x => x * x; ` } - const expectedCode = ` - import { w, x, y, z } from "source-module"; - import { f, g } from "other-source-module"; - import { h } from "another-source-module"; + // const expectedCode = ` + // import { w, x, y, z } from "one_module"; + // import { f, g } from "other_module"; + // import { h } from "another_module"; - function __$b$$dot$$js__(___$c$$dot$$js___) { - const square = ${accessExportFunctionName}(___$c$$dot$$js___, "square"); + // function __$b$$dot$$js__(___$c$$dot$$js___) { + // const square = ${accessExportFunctionName}(___$c$$dot$$js___, "square"); - const b = square(5); + // const b = square(5); - return pair(null, list(pair("b", b))); - } + // return pair(null, list(pair("b", b))); + // } - function __$c$$dot$$js__() { - const square = x => x * x; + // function __$c$$dot$$js__() { + // const square = x => x * x; - return pair(null, list(pair("square", square))); - } + // return pair(null, list(pair("square", square))); + // } - const ___$c$$dot$$js___ = __$c$$dot$$js__(); - const ___$b$$dot$$js___ = __$b$$dot$$js__(___$c$$dot$$js___); + // const ___$c$$dot$$js___ = __$c$$dot$$js__(); + // const ___$b$$dot$$js___ = __$b$$dot$$js__(___$c$$dot$$js___); - const b = ${accessExportFunctionName}(___$b$$dot$$js___, "b"); + // const b = ${accessExportFunctionName}(___$b$$dot$$js___, "b"); - b; - ` - const actualProgram = await preprocessFileImports(files, '/a.js', actualContext) - assertASTsAreEquivalent(actualProgram, expectedCode) + // b; + // ` + const actualProgram = await preprocessFileImports(files, '/a.js', actualContext, { + allowUndefinedImports: true + }) + testAgainstSnapshot(actualProgram) + // assertASTsAreEquivalent(actualProgram, expectedCode) }) - it('returns CircularImportError if there are circular imports', () => { + it('returns CircularImportError if there are circular imports', async () => { const files: Record = { '/a.js': ` import { b } from "./b.js"; @@ -265,13 +290,13 @@ describe('preprocessFileImports', () => { export const c = 3; ` } - preprocessFileImports(files, '/a.js', actualContext) + await preprocessFileImports(files, '/a.js', actualContext) expect(parseError(actualContext.errors)).toMatchInlineSnapshot( - `"Circular import detected: '/a.js' -> '/b.js' -> '/c.js' -> '/a.js'."` + `"Circular import detected: '/c.js' -> '/a.js' -> '/b.js' -> '/c.js'."` ) }) - it('returns CircularImportError if there are circular imports - verbose', () => { + it('returns CircularImportError if there are circular imports - verbose', async () => { const files: Record = { '/a.js': ` import { b } from "./b.js"; @@ -289,15 +314,15 @@ describe('preprocessFileImports', () => { export const c = 3; ` } - preprocessFileImports(files, '/a.js', actualContext) + await preprocessFileImports(files, '/a.js', actualContext) expect(parseError(actualContext.errors, true)).toMatchInlineSnapshot(` - "Circular import detected: '/a.js' -> '/b.js' -> '/c.js' -> '/a.js'. + "Circular import detected: '/c.js' -> '/a.js' -> '/b.js' -> '/c.js'. Break the circular import cycle by removing imports from any of the offending files. " `) }) - it('returns CircularImportError if there are self-imports', () => { + it('returns CircularImportError if there are self-imports', async () => { const files: Record = { '/a.js': ` import { y } from "./a.js"; @@ -305,13 +330,13 @@ describe('preprocessFileImports', () => { export { x as y }; ` } - preprocessFileImports(files, '/a.js', actualContext) + await preprocessFileImports(files, '/a.js', actualContext) expect(parseError(actualContext.errors)).toMatchInlineSnapshot( `"Circular import detected: '/a.js' -> '/a.js'."` ) }) - it('returns CircularImportError if there are self-imports - verbose', () => { + it('returns CircularImportError if there are self-imports - verbose', async () => { const files: Record = { '/a.js': ` import { y } from "./a.js"; @@ -319,7 +344,7 @@ describe('preprocessFileImports', () => { export { x as y }; ` } - preprocessFileImports(files, '/a.js', actualContext) + await preprocessFileImports(files, '/a.js', actualContext) expect(parseError(actualContext.errors, true)).toMatchInlineSnapshot(` "Circular import detected: '/a.js' -> '/a.js'. Break the circular import cycle by removing imports from any of the offending files. @@ -392,7 +417,7 @@ describe('preprocessFileImports', () => { x + y; ` - const actualProgram = await preprocessFileImports(files, '/a.js', actualContext) + const actualProgram = await preprocessFileImports(files, '/a.js', actualContext, { allowUndefinedImports: true }) assertASTsAreEquivalent(actualProgram, expectedCode) }) }) diff --git a/src/localImports/__tests__/transformers/__snapshots__/hoistAndMergeImports.ts.snap b/src/localImports/__tests__/transformers/__snapshots__/hoistAndMergeImports.ts.snap new file mode 100644 index 000000000..0e387b4ca --- /dev/null +++ b/src/localImports/__tests__/transformers/__snapshots__/hoistAndMergeImports.ts.snap @@ -0,0 +1,21 @@ +// Jest Snapshot v1, https://goo.gl/fbAQLP + +exports[`hoistAndMergeImports hoists import declarations to the top of the program 1`] = ` +"import x from \\"source-module\\"; +function square(x) { + return x * x; +} +import {a, b, c} from \\"./a.js\\"; +export {square}; +import x from \\"source-module\\"; +square(3); +" +`; + +exports[`hoistAndMergeImports merges import declarations from the same module 1`] = ` +"import {a, b, c} from \\"./a.js\\"; +import {d} from \\"./a.js\\"; +import {x} from \\"./b.js\\"; +import {e, f} from \\"./a.js\\"; +" +`; diff --git a/src/localImports/__tests__/transformers/hoistAndMergeImports.ts b/src/localImports/__tests__/transformers/hoistAndMergeImports.ts index 3a492ab24..1db1458bf 100644 --- a/src/localImports/__tests__/transformers/hoistAndMergeImports.ts +++ b/src/localImports/__tests__/transformers/hoistAndMergeImports.ts @@ -1,27 +1,40 @@ +import { generate } from 'astring' import { mockContext } from '../../../mocks/context' import { parse } from '../../../parser/parser' import { Chapter } from '../../../types' -import { hoistAndMergeImports } from '../../transformers/hoistAndMergeImports' -import { parseCodeError, stripLocationInfo } from '../utils' +import hoistAndMergeImports from '../../transformers/hoistAndMergeImports' +import { parseCodeError } from '../utils' describe('hoistAndMergeImports', () => { let actualContext = mockContext(Chapter.LIBRARY_PARSER) - let expectedContext = mockContext(Chapter.LIBRARY_PARSER) + // let expectedContext = mockContext(Chapter.LIBRARY_PARSER) beforeEach(() => { actualContext = mockContext(Chapter.LIBRARY_PARSER) - expectedContext = mockContext(Chapter.LIBRARY_PARSER) + // expectedContext = mockContext(Chapter.LIBRARY_PARSER) }) - const assertASTsAreEquivalent = (actualCode: string, expectedCode: string): void => { - const actualProgram = parse(actualCode, actualContext) - const expectedProgram = parse(expectedCode, expectedContext) - if (actualProgram === null || expectedProgram === null) { + // const assertASTsAreEquivalent = (actualCode: string, expectedCode: string): void => { + // const actualProgram = parse(actualCode, actualContext) + // const expectedProgram = parse(expectedCode, expectedContext) + // if (actualProgram === null || expectedProgram === null) { + // throw parseCodeError + // } + + // actualProgram.body = [...hoistAndMergeImports([actualProgram]), ...actualProgram.body] + // expect(stripLocationInfo(actualProgram)).toEqual(stripLocationInfo(expectedProgram)) + // } + + const testAgainstSnapshot = (code: string) => { + const program = parse(code, actualContext) + if (program === null) { throw parseCodeError } - hoistAndMergeImports(actualProgram) - expect(stripLocationInfo(actualProgram)).toEqual(stripLocationInfo(expectedProgram)) + program.body = [...hoistAndMergeImports([program]), ...program.body] + + expect(generate(program)) + .toMatchSnapshot() } test('hoists import declarations to the top of the program', () => { @@ -38,19 +51,20 @@ describe('hoistAndMergeImports', () => { square(3); ` - const expectedCode = ` - import { a, b, c } from "./a.js"; - import x from "source-module"; + testAgainstSnapshot(actualCode) + // const expectedCode = ` + // import { a, b, c } from "./a.js"; + // import x from "source-module"; - function square(x) { - return x * x; - } + // function square(x) { + // return x * x; + // } - export { square }; + // export { square }; - square(3); - ` - assertASTsAreEquivalent(actualCode, expectedCode) + // square(3); + // ` + // assertASTsAreEquivalent(actualCode, expectedCode) }) test('merges import declarations from the same module', () => { @@ -60,10 +74,12 @@ describe('hoistAndMergeImports', () => { import { x } from "./b.js"; import { e, f } from "./a.js"; ` - const expectedCode = ` - import { a, b, c, d, e, f } from "./a.js"; - import { x } from "./b.js"; - ` - assertASTsAreEquivalent(actualCode, expectedCode) + + testAgainstSnapshot(actualCode) + // const expectedCode = ` + // import { a, b, c, d, e, f } from "./a.js"; + // import { x } from "./b.js"; + // ` + // assertASTsAreEquivalent(actualCode, expectedCode) }) }) diff --git a/src/localImports/__tests__/transformers/removeExports.ts b/src/localImports/__tests__/transformers/removeExports.ts deleted file mode 100644 index 656969a00..000000000 --- a/src/localImports/__tests__/transformers/removeExports.ts +++ /dev/null @@ -1,159 +0,0 @@ -import { mockContext } from '../../../mocks/context' -import { parse } from '../../../parser/parser' -import { Chapter } from '../../../types' -import { removeExports } from '../../transformers/removeExports' -import { parseCodeError, stripLocationInfo } from '../utils' - -describe('removeExports', () => { - let actualContext = mockContext(Chapter.LIBRARY_PARSER) - let expectedContext = mockContext(Chapter.LIBRARY_PARSER) - - beforeEach(() => { - actualContext = mockContext(Chapter.LIBRARY_PARSER) - expectedContext = mockContext(Chapter.LIBRARY_PARSER) - }) - - const assertASTsAreEquivalent = (actualCode: string, expectedCode: string): void => { - const actualProgram = parse(actualCode, actualContext) - const expectedProgram = parse(expectedCode, expectedContext) - if (actualProgram === null || expectedProgram === null) { - throw parseCodeError - } - - removeExports(actualProgram) - expect(stripLocationInfo(actualProgram)).toEqual(stripLocationInfo(expectedProgram)) - } - - describe('removes ExportNamedDeclaration nodes', () => { - test('when exporting variable declarations', () => { - const actualCode = ` - export const x = 42; - export let y = 53; - ` - const expectedCode = ` - const x = 42; - let y = 53; - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - test('when exporting function declarations', () => { - const actualCode = ` - export function square(x) { - return x * x; - } - ` - const expectedCode = ` - function square(x) { - return x * x; - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - test('when exporting arrow function declarations', () => { - const actualCode = ` - export const square = x => x * x; - ` - const expectedCode = ` - const square = x => x * x; - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - test('when exporting (renamed) identifiers', () => { - const actualCode = ` - const x = 42; - let y = 53; - function square(x) { - return x * x; - } - const id = x => x; - export { x, y, square as sq, id as default }; - ` - const expectedCode = ` - const x = 42; - let y = 53; - function square(x) { - return x * x; - } - const id = x => x; - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - }) - - describe('removes ExportDefaultDeclaration nodes', () => { - // Default exports of variable declarations and arrow function declarations - // is not allowed in ES6, and will be caught by the Acorn parser. - test('when exporting function declarations', () => { - const actualCode = ` - export default function square(x) { - return x * x; - } - ` - const expectedCode = ` - function square(x) { - return x * x; - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - test('when exporting constants', () => { - const actualCode = ` - const x = 42; - export default x; - ` - const expectedCode = ` - const x = 42; - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - test('when exporting variables', () => { - const actualCode = ` - let y = 53; - export default y; - ` - const expectedCode = ` - let y = 53; - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - test('when exporting functions', () => { - const actualCode = ` - function square(x) { - return x * x; - } - export default square; - ` - const expectedCode = ` - function square(x) { - return x * x; - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - test('when exporting arrow functions', () => { - const actualCode = ` - const id = x => x; - export default id; - ` - const expectedCode = ` - const id = x => x; - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - test('when exporting expressions', () => { - const actualCode = ` - export default 123 + 456; - ` - const expectedCode = '' - assertASTsAreEquivalent(actualCode, expectedCode) - }) - }) -}) diff --git a/src/modules/__mocks__/moduleLoader.ts b/src/modules/__mocks__/moduleLoader.ts new file mode 100644 index 000000000..703da5ed6 --- /dev/null +++ b/src/modules/__mocks__/moduleLoader.ts @@ -0,0 +1,15 @@ +export function loadModuleBundle() { + return { + foo: () => 'foo', + bar: () => 'bar', + } +} + +export function loadModuleTabs() { + return [] +} +export const memoizedGetModuleManifest = () => ({ + one_module: { tabs: [] }, + other_module: { tabs: [] }, + another_module: { tabs: [] }, +}) \ No newline at end of file diff --git a/src/modules/__mocks__/moduleLoaderAsync.ts b/src/modules/__mocks__/moduleLoaderAsync.ts new file mode 100644 index 000000000..d615f45ea --- /dev/null +++ b/src/modules/__mocks__/moduleLoaderAsync.ts @@ -0,0 +1,26 @@ +export const memoizedGetModuleDocsAsync = () => Promise.resolve({ + foo: 'foo', + bar: 'bar', +}) + +export const memoizedGetModuleBundleAsync = () => Promise.resolve(`require => ({ + foo: () => 'foo', + bar: () => 'bar', +})`) + +export const memoizedGetModuleManifestAsync = () => Promise.resolve({ + one_module: { tabs: [] }, + other_module: { tabs: [] }, + another_module: { tabs: [] }, +}) + +export function loadModuleBundleAsync() { + return Promise.resolve({ + foo: () => 'foo', + bar: () => 'bar', + }) +} + +export function loadModuleTabsAsync() { + return Promise.resolve([]) +} \ No newline at end of file diff --git a/src/modules/__tests__/moduleLoader.ts b/src/modules/__tests__/moduleLoader.ts index b0f04918d..eb3a97b7b 100644 --- a/src/modules/__tests__/moduleLoader.ts +++ b/src/modules/__tests__/moduleLoader.ts @@ -2,10 +2,8 @@ import { createEmptyContext } from '../../createContext' import { Variant } from '../../types' import { stripIndent } from '../../utils/formatters' import { ModuleConnectionError, ModuleInternalError } from '../errors' -import * as moduleLoader from '../moduleLoader' -// Mock memoize function from lodash -jest.mock('lodash', () => ({ memoize: jest.fn(func => func) })) +const moduleLoader = jest.requireActual('../moduleLoader') /** * Mock XMLHttpRequest from jsdom environment diff --git a/src/parser/__tests__/__snapshots__/allowed-syntax.ts.snap b/src/parser/__tests__/__snapshots__/allowed-syntax.ts.snap index 24842a19f..078b102f9 100644 --- a/src/parser/__tests__/__snapshots__/allowed-syntax.ts.snap +++ b/src/parser/__tests__/__snapshots__/allowed-syntax.ts.snap @@ -4290,7 +4290,7 @@ x[key] = 3;", exports[`Syntaxes are allowed in the chapter they are introduced 35: fails a chapter below 1`] = ` Object { "alertResult": Array [], - "code": "import defaultExport from \\"module-name\\";", + "code": "import defaultExport from \\"one_module\\";", "displayResult": Array [], "numErrors": 1, "parsedErrors": "Line 1: Import default specifiers are not allowed", @@ -4303,7 +4303,7 @@ Object { exports[`Syntaxes are allowed in the chapter they are introduced 35: parse passes 1`] = ` Object { "alertResult": Array [], - "code": "parse(\\"import defaultExport from \\\\\\"module-name\\\\\\";\\");", + "code": "parse(\\"import defaultExport from \\\\\\"one_module\\\\\\";\\");", "displayResult": Array [], "numErrors": 0, "parsedErrors": "", @@ -4318,7 +4318,7 @@ Object { null, ], Array [ - "module-name", + "one_module", null, ], ], @@ -4331,7 +4331,7 @@ Object { exports[`Syntaxes are allowed in the chapter they are introduced 35: passes 1`] = ` Object { "alertResult": Array [], - "code": "import defaultExport from \\"module-name\\";", + "code": "import defaultExport from \\"one_module\\";", "displayResult": Array [], "numErrors": 0, "parsedErrors": "", @@ -4451,6 +4451,100 @@ Object { } `; +exports[`Syntaxes are allowed in the chapter they are introduced 36: parse passes 2`] = ` +Object { + "alertResult": Array [], + "code": "parse(\\"export default function f(x) {\\\\n return x;\\\\n}\\\\nf(5);\\");", + "displayResult": Array [], + "numErrors": 0, + "parsedErrors": "", + "result": Array [ + "sequence", + Array [ + Array [ + Array [ + "export_default_declaration", + Array [ + Array [ + "function_declaration", + Array [ + Array [ + "name", + Array [ + "f", + null, + ], + ], + Array [ + Array [ + Array [ + "name", + Array [ + "x", + null, + ], + ], + null, + ], + Array [ + Array [ + "return_statement", + Array [ + Array [ + "name", + Array [ + "x", + null, + ], + ], + null, + ], + ], + null, + ], + ], + ], + ], + null, + ], + ], + Array [ + Array [ + "application", + Array [ + Array [ + "name", + Array [ + "f", + null, + ], + ], + Array [ + Array [ + Array [ + "literal", + Array [ + 5, + null, + ], + ], + null, + ], + null, + ], + ], + ], + null, + ], + ], + null, + ], + ], + "resultStatus": "finished", + "visualiseListResult": Array [], +} +`; + exports[`Syntaxes are allowed in the chapter they are introduced 36: passes 1`] = ` Object { "alertResult": Array [], diff --git a/src/parser/__tests__/allowed-syntax.ts b/src/parser/__tests__/allowed-syntax.ts index 72b22fd37..1cbef93bd 100644 --- a/src/parser/__tests__/allowed-syntax.ts +++ b/src/parser/__tests__/allowed-syntax.ts @@ -294,7 +294,7 @@ test.each([ [ Chapter.LIBRARY_PARSER, ` - import defaultExport from "module-name"; + import defaultExport from "one_module"; ` ], diff --git a/src/typeChecker/__tests__/source1Typed.test.ts b/src/typeChecker/__tests__/source1Typed.test.ts index d682d554d..d29640e12 100644 --- a/src/typeChecker/__tests__/source1Typed.test.ts +++ b/src/typeChecker/__tests__/source1Typed.test.ts @@ -995,8 +995,8 @@ describe('if-else statements', () => { describe('import statements', () => { it('identifies imports even if accessed before import statement', () => { - const code = `show(heart); - import { show, heart } from 'rune'; + const code = `foo(bar); + import { foo, bar } from 'one_module'; ` parse(code, context) @@ -1017,11 +1017,11 @@ describe('import statements', () => { }) it('defaults to any for all imports', () => { - const code = `import { show, heart } from 'rune'; - show(heart); - heart(show); - const x1: string = heart; - const x2: number = show; + const code = `import { foo, bar } from 'one_module'; + foo(bar); + bar(foo); + const x1: string = bar; + const x2: number = foo; ` parse(code, context) diff --git a/src/vm/__tests__/svml-compiler.ts b/src/vm/__tests__/svml-compiler.ts index 4b12710f0..3886a3f37 100644 --- a/src/vm/__tests__/svml-compiler.ts +++ b/src/vm/__tests__/svml-compiler.ts @@ -1,9 +1,9 @@ import { compile, createContext } from '../..' import { Chapter } from '../../types' -test('handles if without else', () => { +test('handles if without else', async () => { const context = createContext(Chapter.SOURCE_3) - const compiled = compile(`if (true) { 1 + 1; }`, context) + const compiled = await compile(`if (true) { 1 + 1; }`, context) expect(compiled).toMatchInlineSnapshot(` Array [ 0, diff --git a/tsconfig.json b/tsconfig.json index 2bd9aa318..9d6cef211 100644 --- a/tsconfig.json +++ b/tsconfig.json @@ -29,6 +29,9 @@ "exclude": [ "src/stdlib/metacircular-interpreter", "src/stdlib/**/*.js", + "src/**/__tests__/", + "src/**/__mocks__/", + "jest.*.*s", "node_modules", "dist", "sicp_publish" From 61a01cf59a9bb2c622f04cfd7ddca62addd90564 Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Thu, 4 May 2023 04:24:56 +0800 Subject: [PATCH 26/95] Ran format --- src/localImports/__tests__/preprocessor.ts | 7 ++++--- .../__tests__/transformers/hoistAndMergeImports.ts | 3 +-- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/src/localImports/__tests__/preprocessor.ts b/src/localImports/__tests__/preprocessor.ts index ef17a0cf9..d4d1b7efb 100644 --- a/src/localImports/__tests__/preprocessor.ts +++ b/src/localImports/__tests__/preprocessor.ts @@ -119,8 +119,7 @@ describe('preprocessFileImports', () => { program.body = [...hoistAndMergeImports([program]), ...program.body] - expect(generate(program)) - .toMatchSnapshot() + expect(generate(program)).toMatchSnapshot() } it('returns undefined if the entrypoint file does not exist', async () => { @@ -417,7 +416,9 @@ describe('preprocessFileImports', () => { x + y; ` - const actualProgram = await preprocessFileImports(files, '/a.js', actualContext, { allowUndefinedImports: true }) + const actualProgram = await preprocessFileImports(files, '/a.js', actualContext, { + allowUndefinedImports: true + }) assertASTsAreEquivalent(actualProgram, expectedCode) }) }) diff --git a/src/localImports/__tests__/transformers/hoistAndMergeImports.ts b/src/localImports/__tests__/transformers/hoistAndMergeImports.ts index 1db1458bf..ba7cda9ae 100644 --- a/src/localImports/__tests__/transformers/hoistAndMergeImports.ts +++ b/src/localImports/__tests__/transformers/hoistAndMergeImports.ts @@ -33,8 +33,7 @@ describe('hoistAndMergeImports', () => { program.body = [...hoistAndMergeImports([program]), ...program.body] - expect(generate(program)) - .toMatchSnapshot() + expect(generate(program)).toMatchSnapshot() } test('hoists import declarations to the top of the program', () => { From 7342b260fa286c4e7a6bf60df3afe878ec091445 Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Thu, 4 May 2023 04:28:30 +0800 Subject: [PATCH 27/95] Make eslint ignore test files --- .eslintrc.json | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/.eslintrc.json b/.eslintrc.json index 79e628819..05225df2c 100644 --- a/.eslintrc.json +++ b/.eslintrc.json @@ -14,6 +14,10 @@ "project": "tsconfig.json", "sourceType": "module" }, + "ignorePatterns": [ + "**/__tests__/**", + "**/__mocks__/**" + ], "plugins": [ "@typescript-eslint", "simple-import-sort" From b3f8a4c2be6f512aeab8b561aba4367c86257051 Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Fri, 5 May 2023 12:03:03 +0800 Subject: [PATCH 28/95] Update transpiler tests --- src/transpiler/__tests__/modules.ts | 97 +------------ src/transpiler/__tests__/variableChecker.ts | 151 +++++++++++++++++--- src/transpiler/transpiler.ts | 2 +- src/transpiler/variableChecker.ts | 2 + 4 files changed, 142 insertions(+), 110 deletions(-) diff --git a/src/transpiler/__tests__/modules.ts b/src/transpiler/__tests__/modules.ts index 5d97abcbd..0915ca755 100644 --- a/src/transpiler/__tests__/modules.ts +++ b/src/transpiler/__tests__/modules.ts @@ -4,53 +4,18 @@ import type { Identifier, Literal, MemberExpression, VariableDeclaration } from import { runInContext } from '../..' import { mockContext } from '../../mocks/context' import { UndefinedImportError } from '../../modules/errors' -import * as moduleLoader from '../../modules/moduleLoaderAsync' import { parse } from '../../parser/parser' import { Chapter, Value } from '../../types' import { stripIndent } from '../../utils/formatters' import { transformImportDeclarations, transpile } from '../transpiler' -// jest.mock('../../modules/moduleLoaderAsync', () => ({ -// ...jest.requireActual('../../modules/moduleLoaderAsync'), -// memoizedGetModuleFile: jest.fn(), -// memoizedGetModuleManifest: jest.fn().mockReturnValue({ -// one_module: { -// tabs: [] -// }, -// another_module: { -// tabs: [] -// } -// }), -// memoizedloadModuleDocs: jest.fn().mockReturnValue({ -// foo: 'foo', -// bar: 'bar' -// }) -// })) -jest.spyOn(moduleLoader, 'memoizedGetModuleManifestAsync').mockResolvedValue({ - one_module: { tabs: ['tab0'] }, - another_module: { tabs: [] } -}) - -jest.spyOn(moduleLoader, 'memoizedGetModuleDocsAsync').mockResolvedValue({ - foo: 'foo', - bar: 'bar' -}) - // const asMock = (func: T) => func as MockedFunction // const mockedModuleFile = asMock(memoizedGetModuleFile) test('Transform import declarations into variable declarations', async () => { - // mockedModuleFile.mockImplementation((name, type) => { - // if (type === 'json') { - // return name === 'one_module' ? "{ foo: 'foo' }" : "{ bar: 'bar' }" - // } else { - // return 'undefined' - // } - // }) - const code = stripIndent` - import { foo } from "test/one_module"; - import { bar } from "test/another_module"; + import { foo } from "one_module"; + import { bar } from "another_module"; foo(bar); ` const context = mockContext(Chapter.SOURCE_4) @@ -68,17 +33,9 @@ test('Transform import declarations into variable declarations', async () => { }) test('Transpiler accounts for user variable names when transforming import statements', async () => { - // mockedModuleFile.mockImplementation((name, type) => { - // if (type === 'json') { - // return name === 'one_module' ? "{ foo: 'foo' }" : "{ bar: 'bar' }" - // } else { - // return 'undefined' - // } - // }) - const code = stripIndent` - import { foo } from "test/one_module"; - import { bar as __MODULE__2 } from "test/another_module"; + import { foo } from "one_module"; + import { bar as __MODULE__2 } from "another_module"; const __MODULE__ = 'test0'; const __MODULE__0 = 'test1'; foo(bar); @@ -112,30 +69,6 @@ test('Transpiler accounts for user variable names when transforming import state ).toEqual('__MODULE__3') }) -test('checkForUndefinedVariables accounts for import statements', async () => { - const code = stripIndent` - import { foo } from "one_module"; - foo; - ` - const context = mockContext(Chapter.SOURCE_4) - const program = parse(code, context)! - await transpile(program, context, false) -}) - -test('importing undefined variables should throw errors', async () => { - const code = stripIndent` - import { hello } from 'one_module'; - ` - const context = mockContext(Chapter.SOURCE_4) - const program = parse(code, context)! - try { - await transpile(program, context, false) - } catch (error) { - expect(error).toBeInstanceOf(UndefinedImportError) - expect((error as UndefinedImportError).symbol).toEqual('hello') - } -}) - test('Module loading functionality', async () => { const code = stripIndent` import { foo } from 'one_module'; @@ -161,25 +94,3 @@ test('importing undefined variables should throw errors', async () => { expect((error as UndefinedImportError).symbol).toEqual('hello') } }) - -test('importing undefined variables should throw errors', () => { - // mockedModuleFile.mockImplementation((name, type) => { - // if (type === 'json') { - // return '{}' - // } else { - // return 'undefined' - // } - // }) - - const code = stripIndent` - import { hello } from 'one_module'; - ` - const context = mockContext(Chapter.SOURCE_4) - const program = parse(code, context)! - try { - transpile(program, context, false) - } catch (error) { - expect(error).toBeInstanceOf(UndefinedImportError) - expect((error as UndefinedImportError).symbol).toEqual('hello') - } -}) diff --git a/src/transpiler/__tests__/variableChecker.ts b/src/transpiler/__tests__/variableChecker.ts index 128b0bc37..42bc14df3 100644 --- a/src/transpiler/__tests__/variableChecker.ts +++ b/src/transpiler/__tests__/variableChecker.ts @@ -1,20 +1,39 @@ import type { Context } from '../..' +import { UndefinedVariable } from '../../errors/errors' import { mockContext } from '../../mocks/context' import { parse } from '../../parser/parser' import { Chapter } from '../../types' import checkForUndefinedVariables from '../variableChecker' -function assertUndefined(code: string, context: Context, message: string | null) { +type ErrorInfo = { + name: string; + line: number + col: number +} + +function assertUndefined(code: string, context: Context, errorInfo: ErrorInfo | null) { const parsed = parse(code, context, {}, true)! // console.log(parsed.type) - if (message !== null) { - expect(() => checkForUndefinedVariables(parsed, new Set())).toThrowError(message) + if (errorInfo !== null) { + let error: any = null + try { + checkForUndefinedVariables(parsed, new Set()) + } catch (e) { + error = e + } + + expect(error).toBeInstanceOf(UndefinedVariable) + expect(error.name).toEqual(errorInfo.name) + expect(error.location.start).toMatchObject({ + line: errorInfo.line, + column: errorInfo.col + }) } else { expect(() => checkForUndefinedVariables(parsed, new Set())).not.toThrow() } } -function testCases(desc: string, cases: [name: string, code: string, err: null | string][]) { +function testCases(desc: string, cases: [name: string, code: string, err: null | ErrorInfo][]) { const context = mockContext(Chapter.FULL_JS) describe(desc, () => { test.concurrent.each(cases)('%#. %s', (_, code, expected) => @@ -25,11 +44,11 @@ function testCases(desc: string, cases: [name: string, code: string, err: null | describe('Test variable declarations', () => { testCases('Test checking variable declarations', [ - ['Check single declaration', 'const x = unknown_var;', ''], - ['Check multiple declarations', 'const x = unknown_var, y = unknown_var;', ''], - ['Check object pattern declaration', 'const x = { item0: unknown_var };', ''], - ['Check nested object pattern declaration', 'const x = { item0: { ...unknown_var } };', ''], - ['Check array pattern declaration', 'const [x, y, { z }] = unknown_var;', ''], + ['Check single declaration', 'const x = unknown_var;', { name: 'unknown_var', line: 1, col: 10 }], + ['Check multiple declarations', 'const x = unknown_var, y = unknown_var;', { name: 'unknown_var', line: 1, col: 10}], + ['Check object pattern declaration', 'const x = { item0: unknown_var };', { name: 'unknown_var', line: 1, col: 19 }], + ['Check nested object pattern declaration', 'const x = { item0: { ...unknown_var } };', { name: 'unknown_var', line: 1, col: 24 }], + ['Check array pattern declaration', 'const [x, y, { z }] = unknown_var;', { name: 'unknown_var', line: 1, col: 22 }], ['Check let declaration', 'let x; 5+5; x = 0;', null] ]) @@ -51,13 +70,13 @@ describe('Test functions', () => { [ 'Declarations should not be accessible from outer scopes', 'function a() { function b() { } } b()', - '' + { name: 'b', line: 1, col: 34 } ] ]) testCases('Test undefined variable checking', [ [ - 'Function parameters are accounted for', + 'Function parameters and name are accounted for', 'function hi_there(a, b, c, d) { hi_there; a; b; c; d; }', null ], @@ -66,7 +85,7 @@ describe('Test functions', () => { 'function hi_there({a, e: { x: [c], ...d } }, b) { hi_there; a; b; c; d; }', null ], - ['Function bodies are checked correctly', 'function hi_there() { unknown_var }', ''], + ['Function bodies are checked correctly', 'function hi_there() { unknown_var }', { name: 'unknown_var', line: 1, col: 22 }], [ 'Identifiers from outside scopes are accounted for', 'const known = 0; function hi_there() { return known }', @@ -86,11 +105,11 @@ describe('Test functions', () => { 'const hi_there = ({a, e: { x: [c], ...d } }, b) => { hi_there; a; b; c; d; }', null ], - ['Function bodies are checked correctly', 'const hi_there = () => { unknown_var }', ''], + ['Function bodies are checked correctly', 'const hi_there = () => { unknown_var }', { name: 'unknown_var', line: 1, col: 25 }], [ 'Function expression bodies are checked correctly', 'const hi_there = param => unknown_var && param', - '' + { name: 'unknown_var', line: 1, col: 26 } ] ]) @@ -105,13 +124,113 @@ describe('Test functions', () => { 'const hi_there = function ({a, e: { x: [c], ...d } }, b) { hi_there; a; b; c; d; }', null ], - ['Function bodies are checked correctly', 'const hi_there = function () { unknown_var }', ''] + ['Function bodies are checked correctly', 'const hi_there = function () { unknown_var }', { name: 'unknown_var', line: 1, col: 31}] ]) }) describe('Test export and import declarations', () => { testCases('Test ExportNamedDeclaration', [ ['Export function declarations are hoisted', 'hi(); export function hi() {}', null], - ['Export function declarations are checked', 'hi(); export function hi() { unknown_var }', ''] + ['Export function declarations are checked', 'hi(); export function hi() { unknown_var }', { name: 'unknown_var', line: 1, col: 29 }], + [ + 'Non declaration exports do not introduce identifiers', + "export { hi } from './elsewhere.js'; hi;", + { name: 'hi', line: 1, col: 37 } + ] + ]) + + testCases('Test ExportDefaultDeclaration', [ + ['Export function declarations are hoisted', 'hi(); export default function hi() {}', null], + [ + 'Export function declarations are checked', + 'hi(); export default function hi() { unknown_var }', + { name: 'unknown_var', line: 1, col: 37 } + ] + ]) + + testCases('Test ExportAllDeclaration', [ + ['Export does not introduce identifiers', "export * as hi from './elsewhere.js'; hi;", { name: 'hi', line: 1, col: 38 }] + ]) + + testCases('Test ImportDeclarations', [ + ['ImportSpecifiers are accounted for', 'import { hi } from "one_module"; hi;', null], + ['ImportDefaultSpecifiers are accounted for', 'import hi from "one_module"; hi;', null], + ]) +}) + +testCases('Test BlockStatements', [ + ['BlockStatements are checked properly', '{ unknown_var }', { name: 'unknown_var', line: 1, col: 2 }], + ['BlockStatements properly conduct hoisting', '{ hi(); function hi() {} }', null], + [ + 'Inner blocks can access the scope of outer blocks', + ` + { + const x = 0; + { + x; + } + } + `, + null + ], + [ + 'Nested inner blocks can access the scope of outer blocks', + ` + { + const x = 0; + { + { + { + x; + } + } + } + } + `, + null + ], + [ + 'Outer blocks cannot access the scope of inner blocks', + ` + { + { + const x = 0; + } + x; + } + `, + { name: 'x', line: 6, col: 4 } + ], + [ + 'Inner blocks can shadow outer variables', + ` + { + const x = 0; + { + const x = 0; + x; + } + x; + } + `, + null + ] +]) + +describe('Test For Statements', () => { + testCases('Test regular for statements', [ + ['Init statement properly declares variables', 'for (let i = 0; i < 5; i++) { i; }', null], + ['Test expression is accounted for', 'for (let i = 0; unknown_var < 5; i++) { i; }', { name: 'unknown_var', line: 1, col: 16 }], + ['Update statement is accounted for', 'for (let i = 0; i < 5; unknown_var++) { i; }', { name: 'unknown_var', line: 1, col: 23 }], + ['Init is scoped to for statement', 'for (let i = 0; i < 5; i++) {} i; ', { name: 'i', line: 1, col: 31 }] ]) }) + +testCases('Test MemberExpressions', [ + ['Non computed properties are ignored', 'const obj = {}; obj.hi;', null], + ['Computed properties are checked', "const obj = {}; obj[unknown_var] = 'x';", { name: 'unknown_var', line: 1, col: 20 }] +]) + +testCases('Test try statements', [ + ['Catch block parameter is accounted for', 'try {} catch (e) { e; }', null] +]) diff --git a/src/transpiler/transpiler.ts b/src/transpiler/transpiler.ts index cb1556fdc..48e05def1 100644 --- a/src/transpiler/transpiler.ts +++ b/src/transpiler/transpiler.ts @@ -11,12 +11,12 @@ import { transformImportNodesAsync } from '../modules/utils' import { AllowedDeclarations, Chapter, Context, NativeStorage, Variant } from '../types' import * as create from '../utils/ast/astCreator' import { isImportDeclaration } from '../utils/ast/typeGuards' +import { simple } from '../utils/ast/walkers' import { getIdentifiersInNativeStorage, getIdentifiersInProgram, getUniqueId } from '../utils/uniqueIds' -import { simple } from '../utils/walkers' import checkForUndefinedVariables from './variableChecker' /** diff --git a/src/transpiler/variableChecker.ts b/src/transpiler/variableChecker.ts index 07711fa87..89d41dac8 100644 --- a/src/transpiler/variableChecker.ts +++ b/src/transpiler/variableChecker.ts @@ -108,6 +108,8 @@ function checkExpression( case 'Property': { if (isPattern(node.value)) checkPattern(node.value, identifiers) else checkExpression(node.value, identifiers) + + if (node.computed) checkExpression(node.key as es.Expression, identifiers) break } case 'SpreadElement': From c47c0307274ca4d6636adabe694afc4363e3d43d Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Sun, 7 May 2023 01:16:21 +0800 Subject: [PATCH 29/95] Reorganize AST utilities --- .eslintrc.json | 3 +- .../__snapshots__/ec-evaluator-errors.ts.snap | 13 - src/ec-evaluator/interpreter.ts | 6 +- src/finder.ts | 2 +- src/gpu/transfomer.ts | 2 +- src/gpu/verification/bodyVerifier.ts | 2 +- src/index.ts | 6 +- src/infiniteLoops/detect.ts | 2 +- src/infiniteLoops/instrument.ts | 2 +- .../__snapshots__/interpreter-errors.ts.snap | 2 +- src/interpreter/closure.ts | 2 +- src/interpreter/interpreter.ts | 29 +- src/lazy/lazy.ts | 2 +- src/localImports/__tests__/analyzer.ts | 338 ++++++++++++++++++ src/localImports/__tests__/preprocessor.ts | 2 +- .../transformers/hoistAndMergeImports.ts | 47 ++- src/localImports/__tests__/utils.ts | 2 +- src/localImports/analyzer.ts | 156 ++++---- src/localImports/preprocessor.ts | 26 +- .../transformers/hoistAndMergeImports.ts | 195 +++------- src/modules/__mocks__/moduleLoader.ts | 6 +- src/modules/__mocks__/moduleLoaderAsync.ts | 27 +- src/modules/errors.ts | 52 +-- src/parser/__tests__/scheme-encode-decode.ts | 2 +- src/parser/source/index.ts | 2 +- src/scope-refactoring.ts | 2 +- src/stepper/stepper.ts | 2 +- src/transpiler/__tests__/variableChecker.ts | 94 ++++- src/utils/arrayMap.ts | 25 ++ src/utils/ast/astUtils.ts | 2 +- src/utils/{ => ast}/dummyAstCreator.ts | 2 +- src/utils/{ => ast}/walkers.ts | 19 + src/utils/uniqueIds.ts | 2 +- src/validator/__tests__/validator.ts | 2 +- src/validator/validator.ts | 2 +- src/vm/svml-compiler.ts | 2 +- 36 files changed, 707 insertions(+), 375 deletions(-) create mode 100644 src/localImports/__tests__/analyzer.ts create mode 100644 src/utils/arrayMap.ts rename src/utils/{ => ast}/dummyAstCreator.ts (98%) rename src/utils/{ => ast}/walkers.ts (80%) diff --git a/.eslintrc.json b/.eslintrc.json index 05225df2c..f4121f209 100644 --- a/.eslintrc.json +++ b/.eslintrc.json @@ -16,7 +16,8 @@ }, "ignorePatterns": [ "**/__tests__/**", - "**/__mocks__/**" + "**/__mocks__/**", + "jest.setup.ts" ], "plugins": [ "@typescript-eslint", diff --git a/src/ec-evaluator/__tests__/__snapshots__/ec-evaluator-errors.ts.snap b/src/ec-evaluator/__tests__/__snapshots__/ec-evaluator-errors.ts.snap index 56e49bab0..8f273c24c 100644 --- a/src/ec-evaluator/__tests__/__snapshots__/ec-evaluator-errors.ts.snap +++ b/src/ec-evaluator/__tests__/__snapshots__/ec-evaluator-errors.ts.snap @@ -792,19 +792,6 @@ Object { } `; -exports[`Importing unknown variables throws UndefinedImport error: expectParsedError 1`] = ` -Object { - "alertResult": Array [], - "code": "import { foo1 } from 'one_module';", - "displayResult": Array [], - "numErrors": 1, - "parsedErrors": "'one_module' does not contain a definition for 'foo1'", - "result": undefined, - "resultStatus": "error", - "visualiseListResult": Array [], -} -`; - exports[`In a block, every going-to-be-defined variable in the block cannot be accessed until it has been defined in the block.: expectParsedError 1`] = ` Object { "alertResult": Array [], diff --git a/src/ec-evaluator/interpreter.ts b/src/ec-evaluator/interpreter.ts index c13b6d3ec..37c08db9b 100644 --- a/src/ec-evaluator/interpreter.ts +++ b/src/ec-evaluator/interpreter.ts @@ -160,15 +160,15 @@ async function evaluateImports( { ImportSpecifier: (spec: es.ImportSpecifier, info, node) => { declareIdentifier(context, spec.local.name, node, environment) - defineVariable(context, spec.local.name, info.content![spec.imported.name], true, node) + defineVariable(context, spec.local.name, info.content[spec.imported.name], true, node) }, ImportDefaultSpecifier: (spec, info, node) => { declareIdentifier(context, spec.local.name, node, environment) - defineVariable(context, spec.local.name, info.content!['default'], true, node) + defineVariable(context, spec.local.name, info.content['default'], true, node) }, ImportNamespaceSpecifier: (spec, info, node) => { declareIdentifier(context, spec.local.name, node, environment) - defineVariable(context, spec.local.name, info.content!, true, node) + defineVariable(context, spec.local.name, info.content, true, node) } } ) diff --git a/src/finder.ts b/src/finder.ts index 87b56cab8..cbb000457 100644 --- a/src/finder.ts +++ b/src/finder.ts @@ -18,7 +18,7 @@ import { FullWalkerCallback, recursive, WalkerCallback -} from './utils/walkers' +} from './utils/ast/walkers' // Finds the innermost node that matches the given location export function findIdentifierNode( diff --git a/src/gpu/transfomer.ts b/src/gpu/transfomer.ts index c64f0460a..e9f664d19 100644 --- a/src/gpu/transfomer.ts +++ b/src/gpu/transfomer.ts @@ -1,7 +1,7 @@ import * as es from 'estree' import * as create from '../utils/ast/astCreator' -import { ancestor, make, simple } from '../utils/walkers' +import { ancestor, make, simple } from '../utils/ast/walkers' import GPUBodyVerifier from './verification/bodyVerifier' import GPULoopVerifier from './verification/loopVerifier' diff --git a/src/gpu/verification/bodyVerifier.ts b/src/gpu/verification/bodyVerifier.ts index 706440102..c29abc3c0 100644 --- a/src/gpu/verification/bodyVerifier.ts +++ b/src/gpu/verification/bodyVerifier.ts @@ -1,6 +1,6 @@ import * as es from 'estree' -import { make, simple } from '../../utils/walkers' +import { make, simple } from '../../utils/ast/walkers' /* * GPU Body verifier helps to ensure the body is parallelizable diff --git a/src/index.ts b/src/index.ts index 97e0b60e9..613306e2f 100644 --- a/src/index.ts +++ b/src/index.ts @@ -21,7 +21,7 @@ import { SVMProgram, Variant } from './types' -import { findNodeAt } from './utils/walkers' +import { findNodeAt } from './utils/ast/walkers' import { assemble } from './vm/svml-assembler' import { compileToIns } from './vm/svml-compiler' export { SourceDocumentation } from './editors/ace/docTooltip' @@ -76,6 +76,10 @@ export function parseError(errors: SourceError[], verbose: boolean = verboseErro const filePath = error.location?.source ? `[${error.location.source}] ` : '' const line = error.location ? error.location.start.line : '' const column = error.location ? error.location.start.column : '' + if (!error.explain as any) { + // console.log(error) + } + const explanation = error.explain() if (verbose) { diff --git a/src/infiniteLoops/detect.ts b/src/infiniteLoops/detect.ts index af9b98416..a29de175f 100644 --- a/src/infiniteLoops/detect.ts +++ b/src/infiniteLoops/detect.ts @@ -1,7 +1,7 @@ import { generate } from 'astring' import * as es from 'estree' -import { simple } from '../utils/walkers' +import { simple } from '../utils/ast/walkers' import { InfiniteLoopError, InfiniteLoopErrorType } from './errors' import { getOriginalName } from './instrument' import * as st from './state' diff --git a/src/infiniteLoops/instrument.ts b/src/infiniteLoops/instrument.ts index 59fe85ac2..4e923b5ec 100644 --- a/src/infiniteLoops/instrument.ts +++ b/src/infiniteLoops/instrument.ts @@ -3,7 +3,7 @@ import * as es from 'estree' import { transformImportDeclarations } from '../transpiler/transpiler' import * as create from '../utils/ast/astCreator' -import { recursive, simple, WalkerCallback } from '../utils/walkers' +import { recursive, simple, WalkerCallback } from '../utils/ast/walkers' // transforms AST of program const globalIds = { diff --git a/src/interpreter/__tests__/__snapshots__/interpreter-errors.ts.snap b/src/interpreter/__tests__/__snapshots__/interpreter-errors.ts.snap index b64389a46..ea8702594 100644 --- a/src/interpreter/__tests__/__snapshots__/interpreter-errors.ts.snap +++ b/src/interpreter/__tests__/__snapshots__/interpreter-errors.ts.snap @@ -855,7 +855,7 @@ Object { "code": "import { foo1 } from 'one_module';", "displayResult": Array [], "numErrors": 1, - "parsedErrors": "Unable to get modules.", + "parsedErrors": "Line 1: Module \\"one_module\\" not found.", "result": undefined, "resultStatus": "error", "visualiseListResult": Array [], diff --git a/src/interpreter/closure.ts b/src/interpreter/closure.ts index 954a81aab..80ac21b32 100644 --- a/src/interpreter/closure.ts +++ b/src/interpreter/closure.ts @@ -9,7 +9,7 @@ import { identifier, returnStatement } from '../utils/ast/astCreator' -import { dummyLocation } from '../utils/dummyAstCreator' +import { dummyLocation } from '../utils/ast/dummyAstCreator' import { apply } from './interpreter' const closureToJS = (value: Closure, context: Context, klass: string) => { diff --git a/src/interpreter/interpreter.ts b/src/interpreter/interpreter.ts index 3755e04be..9ef6f2447 100644 --- a/src/interpreter/interpreter.ts +++ b/src/interpreter/interpreter.ts @@ -1,5 +1,5 @@ /* tslint:disable:max-classes-per-file */ -import * as es from 'estree' +import type * as es from 'estree' import { isEmpty, uniqueId } from 'lodash' import { UNKNOWN_LOCATION } from '../constants' @@ -13,6 +13,7 @@ import { checkEditorBreakpoints } from '../stdlib/inspector' import { Context, ContiguousArrayElements, Environment, Frame, Value, Variant } from '../types' import * as create from '../utils/ast/astCreator' import { conditionalExpression, literal, primitive } from '../utils/ast/astCreator' +import { simple } from '../utils/ast/walkers' import { evaluateBinaryExpression, evaluateUnaryExpression } from '../utils/operators' import * as rttc from '../utils/rttc' import Closure from './closure' @@ -746,20 +747,18 @@ export function* evaluateProgram( for (const spec of node.specifiers) { declareIdentifier(context, spec.local.name, node) - switch (spec.type) { - case 'ImportSpecifier': { - defineVariable(context, spec.local.name, functions[spec.imported.name], true) - break - } - case 'ImportDefaultSpecifier': { - defineVariable(context, spec.local.name, functions['default'], true) - break - } - case 'ImportNamespaceSpecifier': { - defineVariable(context, spec.local.name, functions, true) - break - } - } + simple(spec, { + ImportSpecifier: () => + defineVariable( + context, + spec.local.name, + functions[(spec as es.ImportSpecifier).imported.name], + true + ), + ImportDefaultSpecifier: () => + defineVariable(context, spec.local.name, functions['default'], true), + ImportNamespaceSpecifier: () => defineVariable(context, spec.local.name, functions, true) + }) } yield* leave(context) } diff --git a/src/lazy/lazy.ts b/src/lazy/lazy.ts index 8d02437ef..a53b89aca 100644 --- a/src/lazy/lazy.ts +++ b/src/lazy/lazy.ts @@ -1,8 +1,8 @@ import * as es from 'estree' import * as create from '../utils/ast/astCreator' +import { simple } from '../utils/ast/walkers' import { getIdentifiersInProgram } from '../utils/uniqueIds' -import { simple } from '../utils/walkers' const lazyPrimitives = new Set(['makeLazyFunction', 'wrapLazyCallee', 'forceIt', 'delayIt']) diff --git a/src/localImports/__tests__/analyzer.ts b/src/localImports/__tests__/analyzer.ts new file mode 100644 index 000000000..6e166638c --- /dev/null +++ b/src/localImports/__tests__/analyzer.ts @@ -0,0 +1,338 @@ +import createContext from '../../createContext' +import { CircularImportError } from '../../errors/localImportErrors' +import { UndefinedImportErrorBase } from '../../modules/errors' +import { Chapter } from '../../types' +import { stripIndent } from '../../utils/formatters' +import { validateImportAndExports } from '../analyzer' +import { parseProgramsAndConstructImportGraph } from '../preprocessor' + +type ErrorInfo = { + symbol?: string + line: number + col: number + moduleName: string +} + +async function testCode( + files: Partial>, + entrypointFilePath: string, + allowUndefinedImports: boolean +) { + const context = createContext(Chapter.SOURCE_4) + const { programs, importGraph, moduleDocs } = await parseProgramsAndConstructImportGraph( + files, + entrypointFilePath, + context, + allowUndefinedImports + ) + + // Return 'undefined' if there are errors while parsing. + if (context.errors.length !== 0) { + throw context.errors[0] + } + + // Check for circular imports. + const topologicalOrderResult = importGraph.getTopologicalOrder() + if (!topologicalOrderResult.isValidTopologicalOrderFound) { + throw new CircularImportError(topologicalOrderResult.firstCycleFound) + } + + try { + validateImportAndExports( + moduleDocs, + programs, + topologicalOrderResult.topologicalOrder, + allowUndefinedImports + ) + } catch (error) { + console.log(error) + throw error + } + return true +} + +describe('Test throwing import validation errors', () => { + async function testFailure( + files: Partial>, + entrypointFilePath: string, + allowUndefinedImports: boolean, + errInfo: ErrorInfo + ) { + let err: any = null + try { + await testCode(files, entrypointFilePath, allowUndefinedImports) + } catch (error) { + err = error + } + + expect(err).toBeInstanceOf(UndefinedImportErrorBase) + expect(err.moduleName).toEqual(errInfo.moduleName) + if (errInfo.symbol) { + expect(err.symbol).toEqual(errInfo.symbol) + } + expect(err.location.start).toMatchObject({ + line: errInfo.line, + column: errInfo.col + }) + } + + function testSuccess( + files: Partial>, + entrypointFilePath: string, + allowUndefinedImports: boolean + ) { + return expect(testCode(files, entrypointFilePath, allowUndefinedImports)).resolves.toEqual(true) + } + + function testCases( + desc: string, + cases: [ + files: Partial>, + entrypointFilePath: string, + trueError: false | ErrorInfo, + falseError: false | ErrorInfo + ][] + ) { + describe(desc, () => { + test.each( + cases.flatMap(([files, entry, trueError, falseError], i) => { + return [ + [`Test Case ${i} with allowedUndefinedImports true`, files, entry, true, trueError], + [`Test Case ${i} with allowedUndefinedImports false`, files, entry, false, falseError] + ] + }) + )('%s', async (_, files, entrypointFilePath, allowUndefined, error) => { + if (error !== false) { + await testFailure(files, entrypointFilePath, allowUndefined, error) + } else { + await testSuccess(files, entrypointFilePath, allowUndefined) + } + }) + }) + } + + describe('Test regular imports', () => { + testCases('Local imports', [ + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a } from "./a.js"; + + export function b() { + return a; + } + ` + }, + '/b.js', + false, + false + ], + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a, unknown } from "./a.js"; + + export function b() { + return a; + } + ` + }, + '/b.js', + false, + { moduleName: '/a.js', line: 1, col: 12, symbol: 'unknown' } + ] + ]) + + testCases('Source imports', [ + [ + { + '/a.js': stripIndent` + import { foo, bar } from "one_module"; + export function b() { + return foo(); + } + ` + }, + '/a.js', + false, + false + ], + [ + { + '/a.js': stripIndent` + import { foo, bar } from "one_module"; + export function b() { + return foo(); + } + ` + }, + '/a.js', + false, + false + ] + ]) + + testCases('Source and Local imports', [ + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a } from "./a.js"; + import { bar } from 'one_module'; + + export function b() { + bar(); + return a; + } + ` + }, + '/b.js', + false, + false + ], + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a } from "./a.js"; + import { unknown } from 'one_module'; + + export function b() { + unknown(); + return a; + } + ` + }, + '/b.js', + false, + { moduleName: 'one_module', line: 2, col: 9, symbol: 'unknown' } + ], + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a, unknown } from "./a.js"; + import { foo } from 'one_module'; + + export function b() { + foo(); + return a; + } + ` + }, + '/b.js', + false, + { moduleName: '/a.js', line: 1, col: 12, symbol: 'unknown' } + ] + ]) + }) + + describe('Test default imports', () => { + testCases('Local imports', [ + [ + { + '/a.js': 'const a = "a"; export default a;', + '/b.js': stripIndent` + import a from "./a.js"; + + export function b() { + return a; + } + ` + }, + '/b.js', + false, + false + ], + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import unknown, { a } from "./a.js"; + + export function b() { + return a; + } + ` + }, + '/b.js', + false, + { moduleName: '/a.js', line: 1, col: 12 } + ] + ]) + + testCases('Source imports', [ + [ + { + '/a.js': stripIndent` + import foo from "one_module"; + export function b() { + return foo(); + } + ` + }, + '/a.js', + false, + false + ] + ]) + + testCases('Source and Local imports', [ + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a } from "./a.js"; + import { bar } from 'one_module'; + + export function b() { + bar(); + return a; + } + ` + }, + '/b.js', + false, + false + ], + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a } from "./a.js"; + import { unknown } from 'one_module'; + + export function b() { + unknown(); + return a; + } + ` + }, + '/b.js', + false, + { moduleName: 'one_module', line: 2, col: 9, symbol: 'unknown' } + ], + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a, unknown } from "./a.js"; + import { foo } from 'one_module'; + + export function b() { + foo(); + return a; + } + ` + }, + '/b.js', + false, + { moduleName: '/a.js', line: 1, col: 12, symbol: 'unknown' } + ] + ]) + }) +}) + +describe('Test reexport symbol errors', () => {}) diff --git a/src/localImports/__tests__/preprocessor.ts b/src/localImports/__tests__/preprocessor.ts index d4d1b7efb..d22bb9e0a 100644 --- a/src/localImports/__tests__/preprocessor.ts +++ b/src/localImports/__tests__/preprocessor.ts @@ -117,7 +117,7 @@ describe('preprocessFileImports', () => { throw parseCodeError } - program.body = [...hoistAndMergeImports([program]), ...program.body] + hoistAndMergeImports(program, [program]) expect(generate(program)).toMatchSnapshot() } diff --git a/src/localImports/__tests__/transformers/hoistAndMergeImports.ts b/src/localImports/__tests__/transformers/hoistAndMergeImports.ts index ba7cda9ae..cbf21444b 100644 --- a/src/localImports/__tests__/transformers/hoistAndMergeImports.ts +++ b/src/localImports/__tests__/transformers/hoistAndMergeImports.ts @@ -3,27 +3,27 @@ import { mockContext } from '../../../mocks/context' import { parse } from '../../../parser/parser' import { Chapter } from '../../../types' import hoistAndMergeImports from '../../transformers/hoistAndMergeImports' -import { parseCodeError } from '../utils' +import { parseCodeError, stripLocationInfo } from '../utils' describe('hoistAndMergeImports', () => { let actualContext = mockContext(Chapter.LIBRARY_PARSER) - // let expectedContext = mockContext(Chapter.LIBRARY_PARSER) + let expectedContext = mockContext(Chapter.LIBRARY_PARSER) beforeEach(() => { actualContext = mockContext(Chapter.LIBRARY_PARSER) - // expectedContext = mockContext(Chapter.LIBRARY_PARSER) + expectedContext = mockContext(Chapter.LIBRARY_PARSER) }) - // const assertASTsAreEquivalent = (actualCode: string, expectedCode: string): void => { - // const actualProgram = parse(actualCode, actualContext) - // const expectedProgram = parse(expectedCode, expectedContext) - // if (actualProgram === null || expectedProgram === null) { - // throw parseCodeError - // } + const assertASTsAreEquivalent = (actualCode: string, expectedCode: string): void => { + const actualProgram = parse(actualCode, actualContext) + const expectedProgram = parse(expectedCode, expectedContext) + if (actualProgram === null || expectedProgram === null) { + throw parseCodeError + } - // actualProgram.body = [...hoistAndMergeImports([actualProgram]), ...actualProgram.body] - // expect(stripLocationInfo(actualProgram)).toEqual(stripLocationInfo(expectedProgram)) - // } + hoistAndMergeImports(actualProgram, [actualProgram]) + expect(stripLocationInfo(actualProgram)).toEqual(stripLocationInfo(expectedProgram)) + } const testAgainstSnapshot = (code: string) => { const program = parse(code, actualContext) @@ -31,8 +31,7 @@ describe('hoistAndMergeImports', () => { throw parseCodeError } - program.body = [...hoistAndMergeImports([program]), ...program.body] - + hoistAndMergeImports(program, [program]) expect(generate(program)).toMatchSnapshot() } @@ -51,19 +50,19 @@ describe('hoistAndMergeImports', () => { square(3); ` testAgainstSnapshot(actualCode) - // const expectedCode = ` - // import { a, b, c } from "./a.js"; - // import x from "source-module"; + const expectedCode = ` + import { a, b, c } from "./a.js"; + import x from "source-module"; - // function square(x) { - // return x * x; - // } + function square(x) { + return x * x; + } - // export { square }; + export { square }; - // square(3); - // ` - // assertASTsAreEquivalent(actualCode, expectedCode) + square(3); + ` + assertASTsAreEquivalent(actualCode, expectedCode) }) test('merges import declarations from the same module', () => { diff --git a/src/localImports/__tests__/utils.ts b/src/localImports/__tests__/utils.ts index d2ad6fbc4..a2ee6298f 100644 --- a/src/localImports/__tests__/utils.ts +++ b/src/localImports/__tests__/utils.ts @@ -1,6 +1,6 @@ import es from 'estree' -import { full, simple } from '../../utils/walkers' +import { full, simple } from '../../utils/ast/walkers' export const parseCodeError = new Error('Unable to parse code') diff --git a/src/localImports/analyzer.ts b/src/localImports/analyzer.ts index cd534f8e1..112ce4e94 100644 --- a/src/localImports/analyzer.ts +++ b/src/localImports/analyzer.ts @@ -1,4 +1,4 @@ -import * as es from 'estree' +import type * as es from 'estree' import { ReexportSymbolError } from '../errors/localImportErrors' import { @@ -6,31 +6,10 @@ import { UndefinedImportError, UndefinedNamespaceImportError } from '../modules/errors' +import ArrayMap from '../utils/arrayMap' import { extractIdsFromPattern } from '../utils/ast/astUtils' import { isDeclaration } from '../utils/ast/typeGuards' - -class ArrayMap { - constructor(private readonly map: Map = new Map()) {} - - public get(key: K) { - return this.map.get(key) - } - - public add(key: K, item: V) { - if (!this.map.has(key)) { - this.map.set(key, []) - } - this.map.get(key)!.push(item) - } - - public entries() { - return Array.from(this.map.entries()) - } - - public keys() { - return new Set(this.map.keys()) - } -} +import { simple } from '../utils/ast/walkers' const validateDefaultImport = ( spec: es.ImportDefaultSpecifier | es.ExportSpecifier | es.ImportSpecifier, @@ -65,6 +44,10 @@ const validateNamespaceImport = ( } } +/** + * Check for undefined imports, and also for symbols that have multiple export + * definitions + */ export const validateImportAndExports = ( moduleDocs: Record | null>, programs: Record, @@ -72,96 +55,79 @@ export const validateImportAndExports = ( allowUndefinedImports: boolean ) => { for (const name of topoOrder) { + // Since we're loading in topological order, it is safe to assume that + // program will never be undefined const program = programs[name] const exportedSymbols = new ArrayMap< string, es.ExportSpecifier | Exclude >() - for (const node of program.body) { - switch (node.type) { - case 'ImportDeclaration': { - const source = node.source!.value as string - const exports = moduleDocs[source] - if (!allowUndefinedImports && exports) { - node.specifiers.forEach(spec => { - switch (spec.type) { - case 'ImportSpecifier': { - validateImport(spec, source, exports) - break - } - case 'ImportDefaultSpecifier': { - validateDefaultImport(spec, source, exports) - break - } - case 'ImportNamespaceSpecifier': { - validateNamespaceImport(spec, source, exports) - break - } - } - }) - } - break - } - case 'ExportDefaultDeclaration': { - if (isDeclaration(node.declaration)) { - if (node.declaration.type === 'VariableDeclaration') { - throw new Error() - } - exportedSymbols.add('default', node) - } - break + simple(program, { + ImportDeclaration: (node: es.ImportDeclaration) => { + const source = node.source!.value as string + const exports = moduleDocs[source] + if (allowUndefinedImports || !exports) return + + node.specifiers.forEach(spec => { + simple(spec, { + ImportSpecifier: (spec: es.ImportSpecifier) => validateImport(spec, source, exports), + ImportDefaultSpecifier: (spec: es.ImportDefaultSpecifier) => + validateDefaultImport(spec, source, exports), + ImportNamespaceSpecifier: (spec: es.ImportNamespaceSpecifier) => + validateNamespaceImport(spec, source, exports) + }) + }) + }, + ExportDefaultDeclaration: (node: es.ExportDefaultDeclaration) => { + if (isDeclaration(node.declaration)) { + exportedSymbols.add('default', node) } - case 'ExportNamedDeclaration': { - if (node.declaration) { - if (node.declaration.type === 'VariableDeclaration') { - for (const declaration of node.declaration.declarations) { - extractIdsFromPattern(declaration.id).forEach(id => { - exportedSymbols.add(id.name, node) - }) - } - } else { - exportedSymbols.add(node.declaration.id!.name, node) + }, + ExportNamedDeclaration: (node: es.ExportNamedDeclaration) => { + if (node.declaration) { + if (node.declaration.type === 'VariableDeclaration') { + for (const declaration of node.declaration.declarations) { + extractIdsFromPattern(declaration.id).forEach(id => { + exportedSymbols.add(id.name, node) + }) } - } else if (node.source) { - const source = node.source!.value as string - const exports = moduleDocs[source] - node.specifiers.forEach(spec => { - if (!allowUndefinedImports && exports) { - validateImport(spec, source, exports) - } - - exportedSymbols.add(spec.exported.name, spec) - }) } else { - node.specifiers.forEach(spec => exportedSymbols.add(spec.exported.name, spec)) + exportedSymbols.add(node.declaration.id!.name, node) } - break - } - case 'ExportAllDeclaration': { + } else if (node.source) { const source = node.source!.value as string const exports = moduleDocs[source] - if (!allowUndefinedImports && exports) { - validateNamespaceImport(node, source, exports) - } - if (node.exported) { - exportedSymbols.add(node.exported.name, node) - } else if (exports) { - for (const symbol of exports) { - exportedSymbols.add(symbol, node) + node.specifiers.forEach(spec => { + if (!allowUndefinedImports && exports) { + validateImport(spec, source, exports) } + + exportedSymbols.add(spec.exported.name, spec) + }) + } else { + node.specifiers.forEach(spec => exportedSymbols.add(spec.exported.name, spec)) + } + }, + ExportAllDeclaration: (node: es.ExportAllDeclaration) => { + const source = node.source!.value as string + const exports = moduleDocs[source] + if (!allowUndefinedImports && exports) { + validateNamespaceImport(node, source, exports) + } + if (node.exported) { + exportedSymbols.add(node.exported.name, node) + } else if (exports) { + for (const symbol of exports) { + exportedSymbols.add(symbol, node) } - break } } - } + }) moduleDocs[name] = new Set( exportedSymbols.entries().map(([symbol, nodes]) => { - if (nodes.length === 1) { - return symbol - } - + if (nodes.length === 1) return symbol throw new ReexportSymbolError(name, symbol, nodes) }) ) diff --git a/src/localImports/preprocessor.ts b/src/localImports/preprocessor.ts index c6bd4c543..3c972b46a 100644 --- a/src/localImports/preprocessor.ts +++ b/src/localImports/preprocessor.ts @@ -1,5 +1,5 @@ import es from 'estree' -import * as path from 'path' +import * as pathlib from 'path' import { CircularImportError } from '../errors/localImportErrors' import { ModuleNotFoundError } from '../modules/errors' @@ -45,7 +45,7 @@ const defaultResolutionOptions: Required = { extensions: null } -const parseProgramsAndConstructImportGraph = async ( +export const parseProgramsAndConstructImportGraph = async ( files: Partial>, entrypointFilePath: string, context: Context, @@ -60,7 +60,6 @@ const parseProgramsAndConstructImportGraph = async ( ...defaultResolutionOptions, ...rawResolutionOptions } - const programs: Record = {} const importGraph = new DirectedGraph() @@ -68,7 +67,12 @@ const parseProgramsAndConstructImportGraph = async ( const numOfFiles = Object.keys(files).length const shouldAddSourceFileToAST = numOfFiles > 1 + // docs are only loaded if alloweUndefinedImports is false + // otherwise the entry for each module will be null const moduleDocs: Record | null> = {} + + // If a Source import is never used, then there will be no need to + // load the module manifest let moduleManifest: ModuleManifest | null = null // From the given import source, return the absolute path for that import @@ -92,7 +96,7 @@ const parseProgramsAndConstructImportGraph = async ( if (source in moduleManifest) return source modAbsPath = source } else { - modAbsPath = path.resolve(desiredPath, '..', source) + modAbsPath = pathlib.resolve(desiredPath, '..', source) if (files[modAbsPath] !== undefined) return modAbsPath if (resolutionOptions.directory && files[`${modAbsPath}/index`] !== undefined) { @@ -169,6 +173,8 @@ const parseProgramsAndConstructImportGraph = async ( } dependencies.add(modAbsPath) + + // Replace the source of the node with the resolved path node.source!.value = modAbsPath break } @@ -178,7 +184,12 @@ const parseProgramsAndConstructImportGraph = async ( await Promise.all( Array.from(dependencies.keys()).map(async dependency => { await parseFile(dependency) + + // There is no need to track Source modules as dependencies, as it can be assumed + // that they will always have to be loaded first if (!isSourceImport(dependency)) { + // If the edge has already been traversed before, the import graph + // must contain a cycle. Then we can exit early and proceed to find the cycle if (importGraph.hasEdge(dependency, currentFilePath)) { throw new PreprocessError() } @@ -248,6 +259,7 @@ const preprocessFileImports = async ( context, allowUndefinedImports ) + // Return 'undefined' if there are errors while parsing. if (context.errors.length !== 0) { return undefined @@ -275,7 +287,7 @@ const preprocessFileImports = async ( // We want to operate on the entrypoint program to get the eventual // preprocessed program. const entrypointProgram = programs[entrypointFilePath] - const entrypointDirPath = path.resolve(entrypointFilePath, '..') + const entrypointDirPath = pathlib.resolve(entrypointFilePath, '..') // Create variables to hold the imported statements. const entrypointProgramModuleDeclarations = entrypointProgram.body.filter(isModuleDeclaration) @@ -355,9 +367,7 @@ const preprocessFileImports = async ( // non-Source module imports would have already been removed. As part // of this step, we also merge imports from the same module so as to // import each unique name per module only once. - const importDecls = hoistAndMergeImports(Object.values(programs)) - preprocessedProgram.body = [...importDecls, ...preprocessedProgram.body] - + hoistAndMergeImports(preprocessedProgram, Object.values(programs)) return preprocessedProgram } diff --git a/src/localImports/transformers/hoistAndMergeImports.ts b/src/localImports/transformers/hoistAndMergeImports.ts index d8c526afe..175490412 100644 --- a/src/localImports/transformers/hoistAndMergeImports.ts +++ b/src/localImports/transformers/hoistAndMergeImports.ts @@ -1,121 +1,66 @@ import es from 'estree' -import { isSourceImport } from '../../utils/ast/typeGuards' +import { isImportDeclaration, isSourceImport } from '../../utils/ast/typeGuards' +import { + createIdentifier, + createImportDeclaration, + createImportDefaultSpecifier, + createImportSpecifier, + createLiteral +} from '../constructors/baseConstructors' -// /** -// * Hoists import declarations to the top of the program & merges duplicate -// * imports for the same module. -// * -// * Note that two modules are the same if and only if their import source -// * is the same. This function does not resolve paths against a base -// * directory. If such a functionality is required, this function will -// * need to be modified. -// * -// * @param program The AST which should have its ImportDeclaration nodes -// * hoisted & duplicate imports merged. -// */ -// export const hoistAndMergeImports = (program: es.Program): void => { -// // Separate import declarations from non-import declarations. -// const importDeclarations = program.body.filter(isImportDeclaration) -// const nonImportDeclarations = program.body.filter( -// (node: es.Directive | es.Statement | es.ModuleDeclaration): boolean => -// !isImportDeclaration(node) -// ) - -// // Merge import sources & specifiers. -// const importSourceToSpecifiersMap: Map< -// string, -// Array -// > = new Map() -// for (const importDeclaration of importDeclarations) { -// const importSource = importDeclaration.source.value -// if (typeof importSource !== 'string') { -// throw new Error('Module names must be strings.') -// } -// const specifiers = importSourceToSpecifiersMap.get(importSource) ?? [] -// for (const specifier of importDeclaration.specifiers) { -// // The Acorn parser adds extra information to AST nodes that are not -// // part of the ESTree types. As such, we need to clone and strip -// // the import specifier AST nodes to get a canonical representation -// // that we can use to keep track of whether the import specifier -// // is a duplicate or not. -// const strippedSpecifier = cloneAndStripImportSpecifier(specifier) -// // Note that we cannot make use of JavaScript's built-in Set class -// // as it compares references for objects. -// const isSpecifierDuplicate = -// specifiers.filter( -// ( -// specifier: es.ImportSpecifier | es.ImportDefaultSpecifier | es.ImportNamespaceSpecifier -// ): boolean => { -// return _.isEqual(strippedSpecifier, specifier) -// } -// ).length !== 0 -// if (isSpecifierDuplicate) { -// continue -// } -// specifiers.push(strippedSpecifier) -// } -// importSourceToSpecifiersMap.set(importSource, specifiers) -// } - -// // Convert the merged import sources & specifiers back into import declarations. -// const mergedImportDeclarations: es.ImportDeclaration[] = [] -// importSourceToSpecifiersMap.forEach( -// ( -// specifiers: Array< -// es.ImportSpecifier | es.ImportDefaultSpecifier | es.ImportNamespaceSpecifier -// >, -// importSource: string -// ): void => { -// mergedImportDeclarations.push( -// createImportDeclaration(specifiers, createLiteral(importSource)) -// ) -// } -// ) - -// // Hoist the merged import declarations to the top of the program body. -// program.body = [...mergedImportDeclarations, ...nonImportDeclarations] -// } - -export default function hoistAndMergeImports(programs: es.Program[]) { +/** + * Hoists import declarations to the top of the program & merges duplicate + * imports for the same module. + * + * Note that two modules are the same if and only if their import source + * is the same. This function does not resolve paths against a base + * directory. If such a functionality is required, this function will + * need to be modified. + * + * @param program The AST which should have its ImportDeclaration nodes + * hoisted & duplicate imports merged. + */ +export default function hoistAndMergeImports(program: es.Program, programs: es.Program[]) { const allNodes = programs.flatMap(({ body }) => body) - - const importNodes = allNodes.filter( - (node): node is es.ImportDeclaration => node.type === 'ImportDeclaration' - ) + const importNodes = allNodes.filter(isImportDeclaration) const importsToSpecifiers = new Map>>() + for (const node of importNodes) { + if (!node.source) continue + const source = node.source!.value as string // We no longer need imports from non-source modules, so we can just ignore them if (!isSourceImport(source)) continue - if (!importsToSpecifiers.has(source)) { - importsToSpecifiers.set(source, new Map()) - } - - const specifierMap = importsToSpecifiers.get(source)! - node.specifiers.forEach(spec => { - let importingName: string - switch (spec.type) { - case 'ImportSpecifier': { - importingName = spec.imported.name - break - } - case 'ImportDefaultSpecifier': { - importingName = 'default' - break - } - case 'ImportNamespaceSpecifier': { - // TODO handle - throw new Error() - } + if (isImportDeclaration(node)) { + if (!importsToSpecifiers.has(source)) { + importsToSpecifiers.set(source, new Map()) } + const specifierMap = importsToSpecifiers.get(source)! + node.specifiers.forEach(spec => { + let importingName: string + switch (spec.type) { + case 'ImportSpecifier': { + importingName = spec.imported.name + break + } + case 'ImportDefaultSpecifier': { + importingName = 'default' + break + } + case 'ImportNamespaceSpecifier': { + // TODO handle + throw new Error() + } + } - if (!specifierMap.has(importingName)) { - specifierMap.set(importingName, new Set()) - } - specifierMap.get(importingName)!.add(spec.local.name) - }) + if (!specifierMap.has(importingName)) { + specifierMap.set(importingName, new Set()) + } + specifierMap.get(importingName)!.add(spec.local.name) + }) + } } // Every distinct source module being imported is given its own ImportDeclaration node @@ -125,44 +70,18 @@ export default function hoistAndMergeImports(programs: es.Program[]) { // of all the different aliases used for each unique imported symbol const specifiers = Array.from(imports.entries()).flatMap(([importedName, aliases]) => { if (importedName === 'default') { - return Array.from(aliases).map( - alias => - ({ - type: 'ImportDefaultSpecifier', - local: { - type: 'Identifier', - name: alias - } - } as es.ImportDefaultSpecifier) + return Array.from(aliases).map(alias => + createImportDefaultSpecifier(createIdentifier(alias)) ) as (es.ImportSpecifier | es.ImportDefaultSpecifier)[] } else { - return Array.from(aliases).map( - alias => - ({ - type: 'ImportSpecifier', - imported: { - type: 'Identifier', - name: importedName - }, - local: { - type: 'Identifier', - name: alias - } - } as es.ImportSpecifier) + return Array.from(aliases).map(alias => + createImportSpecifier(createIdentifier(alias), createIdentifier(importedName)) ) } }) - const decl: es.ImportDeclaration = { - type: 'ImportDeclaration', - source: { - type: 'Literal', - value: moduleName - }, - specifiers - } - return decl + return createImportDeclaration(specifiers, createLiteral(moduleName)) } ) - return importDeclarations + program.body = [...importDeclarations, ...program.body] } diff --git a/src/modules/__mocks__/moduleLoader.ts b/src/modules/__mocks__/moduleLoader.ts index 703da5ed6..a7391b8e0 100644 --- a/src/modules/__mocks__/moduleLoader.ts +++ b/src/modules/__mocks__/moduleLoader.ts @@ -1,7 +1,7 @@ export function loadModuleBundle() { return { foo: () => 'foo', - bar: () => 'bar', + bar: () => 'bar' } } @@ -11,5 +11,5 @@ export function loadModuleTabs() { export const memoizedGetModuleManifest = () => ({ one_module: { tabs: [] }, other_module: { tabs: [] }, - another_module: { tabs: [] }, -}) \ No newline at end of file + another_module: { tabs: [] } +}) diff --git a/src/modules/__mocks__/moduleLoaderAsync.ts b/src/modules/__mocks__/moduleLoaderAsync.ts index d615f45ea..f6681a7de 100644 --- a/src/modules/__mocks__/moduleLoaderAsync.ts +++ b/src/modules/__mocks__/moduleLoaderAsync.ts @@ -1,26 +1,29 @@ -export const memoizedGetModuleDocsAsync = () => Promise.resolve({ - foo: 'foo', - bar: 'bar', -}) +export const memoizedGetModuleDocsAsync = () => + Promise.resolve({ + foo: 'foo', + bar: 'bar' + }) -export const memoizedGetModuleBundleAsync = () => Promise.resolve(`require => ({ +export const memoizedGetModuleBundleAsync = () => + Promise.resolve(`require => ({ foo: () => 'foo', bar: () => 'bar', })`) -export const memoizedGetModuleManifestAsync = () => Promise.resolve({ - one_module: { tabs: [] }, - other_module: { tabs: [] }, - another_module: { tabs: [] }, -}) +export const memoizedGetModuleManifestAsync = () => + Promise.resolve({ + one_module: { tabs: [] }, + other_module: { tabs: [] }, + another_module: { tabs: [] } + }) export function loadModuleBundleAsync() { return Promise.resolve({ foo: () => 'foo', - bar: () => 'bar', + bar: () => 'bar' }) } export function loadModuleTabsAsync() { return Promise.resolve([]) -} \ No newline at end of file +} diff --git a/src/modules/errors.ts b/src/modules/errors.ts index 3a5b20dba..b220ed457 100644 --- a/src/modules/errors.ts +++ b/src/modules/errors.ts @@ -57,53 +57,55 @@ export class ModuleInternalError extends RuntimeSourceError { } } -export class UndefinedImportError extends RuntimeSourceError { - constructor( - public readonly symbol: string, - public readonly moduleName: string, - node?: ImportSpecifier | ExportSpecifier - ) { +type SourcedModuleDeclarations = + | ImportSpecifier + | ImportDefaultSpecifier + | ImportNamespaceSpecifier + | ExportSpecifier + | ExportAllDeclaration + +export abstract class UndefinedImportErrorBase extends RuntimeSourceError { + constructor(public readonly moduleName: string, node?: SourcedModuleDeclarations) { super(node) } - public explain(): string { - return `'${this.moduleName}' does not contain a definition for '${this.symbol}'` - } - public elaborate(): string { return "Check your imports and make sure what you're trying to import exists!" } } -export class UndefinedDefaultImportError extends RuntimeSourceError { +export class UndefinedImportError extends UndefinedImportErrorBase { constructor( - public readonly moduleName: string, + public readonly symbol: string, + moduleName: string, node?: ImportSpecifier | ImportDefaultSpecifier | ExportSpecifier ) { - super(node) + super(moduleName, node) } public explain(): string { - return `'${this.moduleName}' does not contain a default export!` - } - - public elaborate(): string { - return "Check your imports and make sure what you're trying to import exists!" + return `'${this.moduleName}' does not contain a definition for '${this.symbol}'` } } -export class UndefinedNamespaceImportError extends RuntimeSourceError { + +export class UndefinedDefaultImportError extends UndefinedImportErrorBase { constructor( - public readonly moduleName: string, - node?: ImportNamespaceSpecifier | ExportAllDeclaration + moduleName: string, + node?: ImportSpecifier | ImportDefaultSpecifier | ExportSpecifier ) { - super(node) + super(moduleName, node) } public explain(): string { - return `'${this.moduleName}' does not export any symbols!` + return `'${this.moduleName}' does not contain a default export!` + } +} +export class UndefinedNamespaceImportError extends UndefinedImportErrorBase { + constructor(moduleName: string, node?: ImportNamespaceSpecifier | ExportAllDeclaration) { + super(moduleName, node) } - public elaborate(): string { - return "Check your imports and make sure what you're trying to import exists!" + public explain(): string { + return `'${this.moduleName}' does not export any symbols!` } } diff --git a/src/parser/__tests__/scheme-encode-decode.ts b/src/parser/__tests__/scheme-encode-decode.ts index a458f0bac..b26b1e70e 100644 --- a/src/parser/__tests__/scheme-encode-decode.ts +++ b/src/parser/__tests__/scheme-encode-decode.ts @@ -2,7 +2,7 @@ import { Node } from 'estree' import { UnassignedVariable } from '../../errors/errors' import { decode, encode } from '../../scm-slang/src' -import { dummyExpression } from '../../utils/dummyAstCreator' +import { dummyExpression } from '../../utils/ast/dummyAstCreator' import { decodeError, decodeValue } from '../scheme' describe('Scheme encoder and decoder', () => { diff --git a/src/parser/source/index.ts b/src/parser/source/index.ts index 4006527bc..c65fd2633 100644 --- a/src/parser/source/index.ts +++ b/src/parser/source/index.ts @@ -3,7 +3,7 @@ import { Node as ESNode, Program } from 'estree' import { DEFAULT_ECMA_VERSION } from '../../constants' import { Chapter, Context, Rule, SourceError, Variant } from '../../types' -import { ancestor, AncestorWalkerFn } from '../../utils/walkers' +import { ancestor, AncestorWalkerFn } from '../../utils/ast/walkers' import { DisallowedConstructError, FatalSyntaxError } from '../errors' import { AcornOptions, Parser } from '../types' import { createAcornParserOptions, positionToSourceLocation } from '../utils' diff --git a/src/scope-refactoring.ts b/src/scope-refactoring.ts index a2b542494..a76e2944e 100644 --- a/src/scope-refactoring.ts +++ b/src/scope-refactoring.ts @@ -2,7 +2,7 @@ import * as es from 'estree' import { isInLoc } from './finder' import { BlockFrame, DefinitionNode } from './types' -import { simple } from './utils/walkers' +import { simple } from './utils/ast/walkers' /** * This file parses the original AST Tree into another tree with a similar structure diff --git a/src/stepper/stepper.ts b/src/stepper/stepper.ts index 8ef1d8303..865db5947 100644 --- a/src/stepper/stepper.ts +++ b/src/stepper/stepper.ts @@ -19,7 +19,7 @@ import { dummyProgram, dummyStatement, dummyVariableDeclarator -} from '../utils/dummyAstCreator' +} from '../utils/ast/dummyAstCreator' import { evaluateBinaryExpression, evaluateUnaryExpression } from '../utils/operators' import * as rttc from '../utils/rttc' import { nodeToValue, valueToExpression } from './converter' diff --git a/src/transpiler/__tests__/variableChecker.ts b/src/transpiler/__tests__/variableChecker.ts index 42bc14df3..f83c7c5cd 100644 --- a/src/transpiler/__tests__/variableChecker.ts +++ b/src/transpiler/__tests__/variableChecker.ts @@ -6,7 +6,7 @@ import { Chapter } from '../../types' import checkForUndefinedVariables from '../variableChecker' type ErrorInfo = { - name: string; + name: string line: number col: number } @@ -44,11 +44,31 @@ function testCases(desc: string, cases: [name: string, code: string, err: null | describe('Test variable declarations', () => { testCases('Test checking variable declarations', [ - ['Check single declaration', 'const x = unknown_var;', { name: 'unknown_var', line: 1, col: 10 }], - ['Check multiple declarations', 'const x = unknown_var, y = unknown_var;', { name: 'unknown_var', line: 1, col: 10}], - ['Check object pattern declaration', 'const x = { item0: unknown_var };', { name: 'unknown_var', line: 1, col: 19 }], - ['Check nested object pattern declaration', 'const x = { item0: { ...unknown_var } };', { name: 'unknown_var', line: 1, col: 24 }], - ['Check array pattern declaration', 'const [x, y, { z }] = unknown_var;', { name: 'unknown_var', line: 1, col: 22 }], + [ + 'Check single declaration', + 'const x = unknown_var;', + { name: 'unknown_var', line: 1, col: 10 } + ], + [ + 'Check multiple declarations', + 'const x = unknown_var, y = unknown_var;', + { name: 'unknown_var', line: 1, col: 10 } + ], + [ + 'Check object pattern declaration', + 'const x = { item0: unknown_var };', + { name: 'unknown_var', line: 1, col: 19 } + ], + [ + 'Check nested object pattern declaration', + 'const x = { item0: { ...unknown_var } };', + { name: 'unknown_var', line: 1, col: 24 } + ], + [ + 'Check array pattern declaration', + 'const [x, y, { z }] = unknown_var;', + { name: 'unknown_var', line: 1, col: 22 } + ], ['Check let declaration', 'let x; 5+5; x = 0;', null] ]) @@ -85,7 +105,11 @@ describe('Test functions', () => { 'function hi_there({a, e: { x: [c], ...d } }, b) { hi_there; a; b; c; d; }', null ], - ['Function bodies are checked correctly', 'function hi_there() { unknown_var }', { name: 'unknown_var', line: 1, col: 22 }], + [ + 'Function bodies are checked correctly', + 'function hi_there() { unknown_var }', + { name: 'unknown_var', line: 1, col: 22 } + ], [ 'Identifiers from outside scopes are accounted for', 'const known = 0; function hi_there() { return known }', @@ -105,7 +129,11 @@ describe('Test functions', () => { 'const hi_there = ({a, e: { x: [c], ...d } }, b) => { hi_there; a; b; c; d; }', null ], - ['Function bodies are checked correctly', 'const hi_there = () => { unknown_var }', { name: 'unknown_var', line: 1, col: 25 }], + [ + 'Function bodies are checked correctly', + 'const hi_there = () => { unknown_var }', + { name: 'unknown_var', line: 1, col: 25 } + ], [ 'Function expression bodies are checked correctly', 'const hi_there = param => unknown_var && param', @@ -124,14 +152,22 @@ describe('Test functions', () => { 'const hi_there = function ({a, e: { x: [c], ...d } }, b) { hi_there; a; b; c; d; }', null ], - ['Function bodies are checked correctly', 'const hi_there = function () { unknown_var }', { name: 'unknown_var', line: 1, col: 31}] + [ + 'Function bodies are checked correctly', + 'const hi_there = function () { unknown_var }', + { name: 'unknown_var', line: 1, col: 31 } + ] ]) }) describe('Test export and import declarations', () => { testCases('Test ExportNamedDeclaration', [ ['Export function declarations are hoisted', 'hi(); export function hi() {}', null], - ['Export function declarations are checked', 'hi(); export function hi() { unknown_var }', { name: 'unknown_var', line: 1, col: 29 }], + [ + 'Export function declarations are checked', + 'hi(); export function hi() { unknown_var }', + { name: 'unknown_var', line: 1, col: 29 } + ], [ 'Non declaration exports do not introduce identifiers', "export { hi } from './elsewhere.js'; hi;", @@ -149,17 +185,25 @@ describe('Test export and import declarations', () => { ]) testCases('Test ExportAllDeclaration', [ - ['Export does not introduce identifiers', "export * as hi from './elsewhere.js'; hi;", { name: 'hi', line: 1, col: 38 }] + [ + 'Export does not introduce identifiers', + "export * as hi from './elsewhere.js'; hi;", + { name: 'hi', line: 1, col: 38 } + ] ]) testCases('Test ImportDeclarations', [ ['ImportSpecifiers are accounted for', 'import { hi } from "one_module"; hi;', null], - ['ImportDefaultSpecifiers are accounted for', 'import hi from "one_module"; hi;', null], + ['ImportDefaultSpecifiers are accounted for', 'import hi from "one_module"; hi;', null] ]) }) testCases('Test BlockStatements', [ - ['BlockStatements are checked properly', '{ unknown_var }', { name: 'unknown_var', line: 1, col: 2 }], + [ + 'BlockStatements are checked properly', + '{ unknown_var }', + { name: 'unknown_var', line: 1, col: 2 } + ], ['BlockStatements properly conduct hoisting', '{ hi(); function hi() {} }', null], [ 'Inner blocks can access the scope of outer blocks', @@ -220,15 +264,31 @@ testCases('Test BlockStatements', [ describe('Test For Statements', () => { testCases('Test regular for statements', [ ['Init statement properly declares variables', 'for (let i = 0; i < 5; i++) { i; }', null], - ['Test expression is accounted for', 'for (let i = 0; unknown_var < 5; i++) { i; }', { name: 'unknown_var', line: 1, col: 16 }], - ['Update statement is accounted for', 'for (let i = 0; i < 5; unknown_var++) { i; }', { name: 'unknown_var', line: 1, col: 23 }], - ['Init is scoped to for statement', 'for (let i = 0; i < 5; i++) {} i; ', { name: 'i', line: 1, col: 31 }] + [ + 'Test expression is accounted for', + 'for (let i = 0; unknown_var < 5; i++) { i; }', + { name: 'unknown_var', line: 1, col: 16 } + ], + [ + 'Update statement is accounted for', + 'for (let i = 0; i < 5; unknown_var++) { i; }', + { name: 'unknown_var', line: 1, col: 23 } + ], + [ + 'Init is scoped to for statement', + 'for (let i = 0; i < 5; i++) {} i; ', + { name: 'i', line: 1, col: 31 } + ] ]) }) testCases('Test MemberExpressions', [ ['Non computed properties are ignored', 'const obj = {}; obj.hi;', null], - ['Computed properties are checked', "const obj = {}; obj[unknown_var] = 'x';", { name: 'unknown_var', line: 1, col: 20 }] + [ + 'Computed properties are checked', + "const obj = {}; obj[unknown_var] = 'x';", + { name: 'unknown_var', line: 1, col: 20 } + ] ]) testCases('Test try statements', [ diff --git a/src/utils/arrayMap.ts b/src/utils/arrayMap.ts new file mode 100644 index 000000000..298e4d699 --- /dev/null +++ b/src/utils/arrayMap.ts @@ -0,0 +1,25 @@ +/** + * Convenience class for maps that store an array of values + */ +export default class ArrayMap { + constructor(private readonly map: Map = new Map()) {} + + public get(key: K) { + return this.map.get(key) + } + + public add(key: K, item: V) { + if (!this.map.has(key)) { + this.map.set(key, []) + } + this.map.get(key)!.push(item) + } + + public entries() { + return Array.from(this.map.entries()) + } + + public keys() { + return new Set(this.map.keys()) + } +} diff --git a/src/utils/ast/astUtils.ts b/src/utils/ast/astUtils.ts index 4c52d53fe..bc9993ceb 100644 --- a/src/utils/ast/astUtils.ts +++ b/src/utils/ast/astUtils.ts @@ -1,6 +1,6 @@ import type * as es from 'estree' -import { recursive } from '../walkers' +import { recursive } from './walkers' export function extractIdsFromPattern(pattern: es.Pattern): Set { const ids = new Set() diff --git a/src/utils/dummyAstCreator.ts b/src/utils/ast/dummyAstCreator.ts similarity index 98% rename from src/utils/dummyAstCreator.ts rename to src/utils/ast/dummyAstCreator.ts index 4784f4a3d..999dda1f9 100644 --- a/src/utils/dummyAstCreator.ts +++ b/src/utils/ast/dummyAstCreator.ts @@ -1,6 +1,6 @@ import * as es from 'estree' -import { BlockExpression } from '../types' +import { BlockExpression } from '../../types' const DUMMY_STRING = '__DUMMY__' const DUMMY_UNARY_OPERATOR = '!' diff --git a/src/utils/walkers.ts b/src/utils/ast/walkers.ts similarity index 80% rename from src/utils/walkers.ts rename to src/utils/ast/walkers.ts index dc069b478..f46be199d 100644 --- a/src/utils/walkers.ts +++ b/src/utils/ast/walkers.ts @@ -68,6 +68,25 @@ export const recursive: ( base?: RecursiveVisitors ) => void = walkers.recursive as any +type Recurse2Walker = (node: Node, state: TState) => TReturn +type Recurse2Callback = ( + node: Node, + state: TState, + callback: Recurse2Walker +) => TReturn +export const recursive2 = ( + node: Node, + state: TState, + walkers: Record>, + onUnsupported: (node: Node) => TReturn = () => { + throw new Error(`${node.type} is unsupported!`) + } +): TReturn => { + const processor = walkers[node.type] + if (!processor) return onUnsupported(node) + return processor(node, state, (n, s) => recursive2(n, s, walkers)) +} + export const full: ( node: Node, callback: FullWalkerCallback, diff --git a/src/utils/uniqueIds.ts b/src/utils/uniqueIds.ts index 5222be274..f426f8b48 100644 --- a/src/utils/uniqueIds.ts +++ b/src/utils/uniqueIds.ts @@ -1,7 +1,7 @@ import * as es from 'estree' import { NativeStorage } from '../types' -import { simple } from '../utils/walkers' +import { simple } from './ast/walkers' export function getUniqueId(usedIdentifiers: Set, uniqueId = 'unique') { while (usedIdentifiers.has(uniqueId)) { diff --git a/src/validator/__tests__/validator.ts b/src/validator/__tests__/validator.ts index bc9a8880e..e5a85d60c 100644 --- a/src/validator/__tests__/validator.ts +++ b/src/validator/__tests__/validator.ts @@ -6,7 +6,7 @@ import { Chapter, NodeWithInferredType } from '../../types' import { getVariableDecarationName } from '../../utils/ast/astCreator' import { stripIndent } from '../../utils/formatters' import { expectParsedError } from '../../utils/testing' -import { simple } from '../../utils/walkers' +import { simple } from '../../utils/ast/walkers' import { validateAndAnnotate } from '../validator' export function toValidatedAst(code: string) { diff --git a/src/validator/validator.ts b/src/validator/validator.ts index 67f1db938..4178539f6 100644 --- a/src/validator/validator.ts +++ b/src/validator/validator.ts @@ -4,7 +4,7 @@ import { ConstAssignment } from '../errors/errors' import { NoAssignmentToForVariable } from '../errors/validityErrors' import { Context, NodeWithInferredType } from '../types' import { getVariableDecarationName } from '../utils/ast/astCreator' -import { ancestor, base, FullWalkerCallback } from '../utils/walkers' +import { ancestor, base, FullWalkerCallback } from '../utils/ast/walkers' class Declaration { public accessedBeforeDeclaration: boolean = false diff --git a/src/vm/svml-compiler.ts b/src/vm/svml-compiler.ts index fa0addfd8..f6b617982 100644 --- a/src/vm/svml-compiler.ts +++ b/src/vm/svml-compiler.ts @@ -12,7 +12,7 @@ import { } from '../stdlib/vm.prelude' import { Context, ContiguousArrayElements } from '../types' import * as create from '../utils/ast/astCreator' -import { recursive, simple } from '../utils/walkers' +import { recursive, simple } from '../utils/ast/walkers' import OpCodes from './opcodes' const VALID_UNARY_OPERATORS = new Map([ From 400d9186b56efb4438df803f8d481e01a5aac8bd Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Wed, 10 May 2023 00:32:47 +0800 Subject: [PATCH 30/95] Make name-extractor async --- src/index.ts | 5 ++- src/name-extractor/index.ts | 75 ++++++++++++++++++++++++++----------- src/runner/sourceRunner.ts | 29 ++++++++++---- 3 files changed, 79 insertions(+), 30 deletions(-) diff --git a/src/index.ts b/src/index.ts index 613306e2f..d6c7c75fd 100644 --- a/src/index.ts +++ b/src/index.ts @@ -58,6 +58,9 @@ export interface IOptions { throwInfiniteLoops: boolean importOptions: ImportTransformOptions + + /** Set to true to console log the transpiler's transpiled code */ + logTranspilerOutput: boolean } // needed to work on browsers @@ -199,7 +202,7 @@ export async function getNames( } const cursorLoc: es.Position = { line, column: col } - const [progNames, displaySuggestions] = getProgramNames(program, comments, cursorLoc) + const [progNames, displaySuggestions] = await getProgramNames(program, comments, cursorLoc) const keywords = getKeywords(program, cursorLoc, context) return [progNames.concat(keywords), displaySuggestions] } diff --git a/src/name-extractor/index.ts b/src/name-extractor/index.ts index 51ae2d0c8..f05a67bc4 100644 --- a/src/name-extractor/index.ts +++ b/src/name-extractor/index.ts @@ -4,8 +4,9 @@ import { Context } from '../' import { UNKNOWN_LOCATION } from '../constants' import { findAncestors, findIdentifierNode } from '../finder' import { ModuleConnectionError, ModuleNotFoundError } from '../modules/errors' -import { memoizedGetModuleDocs } from '../modules/moduleLoader' +import { memoizedGetModuleDocsAsync } from '../modules/moduleLoaderAsync' import syntaxBlacklist from '../parser/source/syntax' +import { isSourceImport } from '../utils/ast/typeGuards' export interface NameDeclaration { name: string @@ -139,11 +140,11 @@ export function getKeywords( * @returns Tuple consisting of the list of suggestions, and a boolean value indicating if * suggestions should be displayed, i.e. `[suggestions, shouldPrompt]` */ -export function getProgramNames( +export async function getProgramNames( prog: es.Node, comments: acorn.Comment[], cursorLoc: es.Position -): [NameDeclaration[], boolean] { +): Promise<[NameDeclaration[], boolean]> { function before(first: es.Position, second: es.Position) { return first.line < second.line || (first.line === second.line && first.column <= second.column) } @@ -198,13 +199,19 @@ export function getProgramNames( } } - const res: any = {} - nameQueue - .map(node => getNames(node, n => cursorInLoc(n.loc))) - .reduce((prev, cur) => prev.concat(cur), []) // no flatmap feelsbad - .forEach((decl, idx) => { - res[decl.name] = { ...decl, score: idx } - }) // Deduplicate, ensure deeper declarations overwrite + const names = await Promise.all(nameQueue.map(node => getNames(node, n => cursorInLoc(n.loc)))) + const res = names.flat().reduce((prev, each, idx) => ({ + ...prev, + [each.name]: { ...each, score: idx } // Deduplicate, ensure deeper declarations overwrite + }), {} as Record) + + // const res: any = {} + // nameQueue + // .map(node => getNames(node, n => cursorInLoc(n.loc))) + // .reduce((prev, cur) => prev.concat(cur), []) // no flatmap feelsbad + // .forEach((decl, idx) => { + // res[decl.name] = { ...decl, score: idx } + // }) return [Object.values(res), true] } @@ -305,36 +312,60 @@ function cursorInIdentifier(node: es.Node, locTest: (node: es.Node) => boolean): * is located within the node, false otherwise * @returns List of found names */ -function getNames(node: es.Node, locTest: (node: es.Node) => boolean): NameDeclaration[] { +async function getNames(node: es.Node, locTest: (node: es.Node) => boolean): Promise { switch (node.type) { case 'ImportDeclaration': + if (!isSourceImport(node.source.value as string)) { + return node.specifiers.map(spec => ({ + name: spec.local.name, + meta: KIND_IMPORT, + docHTML: `No documentation available for ${spec.local.name} from ${node.source.value}` + })) + } + const specs = node.specifiers.filter(x => !isDummyName(x.local.name)) + const source = node.source.value as string; try { - const docs = memoizedGetModuleDocs(node.source.value as string, node) + const docs = await memoizedGetModuleDocsAsync(source) if (!docs) { return specs.map(spec => ({ name: spec.local.name, meta: KIND_IMPORT, - docHTML: `Unable to retrieve documentation for ${spec.local.name} from ${node.source.value} module` + docHTML: `Unable to retrieve documentation for ${spec.local.name} from ${source} module` })) } return specs.map(spec => { - if (spec.type !== 'ImportSpecifier' || docs[spec.local.name] === undefined) { + if (docs[spec.local.name] === undefined) { return { name: spec.local.name, meta: KIND_IMPORT, - docHTML: `No documentation available for ${spec.local.name} from ${node.source.value} module` - } - } else { - return { - name: spec.local.name, - meta: KIND_IMPORT, - docHTML: docs[spec.local.name] + docHTML: `No documentation available for ${spec.local.name} from ${source} module` } } + + switch (spec.type) { + case 'ImportSpecifier': + return { + name: spec.local.name, + meta: KIND_IMPORT, + docHTML: docs[spec.local.name] + } + case 'ImportDefaultSpecifier': + return { + name: spec.local.name, + meta: KIND_IMPORT, + docHTML: docs['default'] + } + case 'ImportNamespaceSpecifier': + return { + name: spec.local.name, + meta: KIND_IMPORT, + docHTML: `${source} module namespace import` + } + } }) } catch (err) { if (!(err instanceof ModuleNotFoundError || err instanceof ModuleConnectionError)) throw err @@ -342,7 +373,7 @@ function getNames(node: es.Node, locTest: (node: es.Node) => boolean): NameDecla return specs.map(spec => ({ name: spec.local.name, meta: KIND_IMPORT, - docHTML: `Unable to retrieve documentation for ${spec.local.name} from ${node.source.value} module` + docHTML: `Unable to retrieve documentation for ${spec.local.name} from ${source} module` })) } case 'VariableDeclaration': diff --git a/src/runner/sourceRunner.ts b/src/runner/sourceRunner.ts index d2bc08b11..319138db3 100644 --- a/src/runner/sourceRunner.ts +++ b/src/runner/sourceRunner.ts @@ -6,7 +6,6 @@ import { IOptions, Result } from '..' import { JSSLANG_PROPERTIES, UNKNOWN_LOCATION } from '../constants' import { ECEResultPromise, evaluate as ECEvaluate } from '../ec-evaluator/interpreter' import { ExceptionError } from '../errors/errors' -import { CannotFindModuleError } from '../errors/localImportErrors' import { RuntimeSourceError } from '../errors/runtimeSourceError' import { TimeoutError } from '../errors/timeoutErrors' import { transpileToGPU } from '../gpu/gpu' @@ -15,7 +14,6 @@ import { testForInfiniteLoop } from '../infiniteLoops/runtime' import { evaluateProgram as evaluate } from '../interpreter/interpreter' import { nonDetEvaluate } from '../interpreter/interpreter-non-det' import { transpileToLazy } from '../lazy/lazy' -import preprocessFileImports from '../localImports/preprocessor' import { getRequireProvider } from '../modules/requireProvider' import { parse } from '../parser/parser' import { AsyncScheduler, NonDetScheduler, PreemptiveScheduler } from '../schedulers' @@ -37,6 +35,8 @@ import { determineExecutionMethod, hasVerboseErrors } from '.' import { toSourceError } from './errors' import { fullJSRunner } from './fullJSRunner' import { determineVariant, resolvedErrorPromise } from './utils' +import preprocessFileImports from '../modules/preprocessor' +import { ModuleNotFoundError } from '../modules/errors' const DEFAULT_SOURCE_OPTIONS: IOptions = { scheduler: 'async', @@ -48,12 +48,16 @@ const DEFAULT_SOURCE_OPTIONS: IOptions = { useSubst: false, isPrelude: false, throwInfiniteLoops: true, + + logTranspilerOutput: false, importOptions: { loadTabs: true, - wrapModules: true + wrapModules: true, + allowUndefinedImports: false } } +// @ts-ignore let previousCode: { files: Partial> entrypointFilePath: string @@ -152,7 +156,7 @@ async function runNative( } ;({ transpiled, sourceMapJson } = await transpile(transpiledProgram, context)) - // console.log(transpiled) + if (options.logTranspilerOutput) console.log(transpiled) let value = await sandboxedEval(transpiled, getRequireProvider(context), context.nativeStorage) if (context.variant === Variant.LAZY) { @@ -222,7 +226,18 @@ export async function sourceRunner( isVerboseErrorsEnabled: boolean, options: Partial = {} ): Promise { - const theOptions: IOptions = { ...DEFAULT_SOURCE_OPTIONS, ...options } + const theOptions: IOptions = { + ...DEFAULT_SOURCE_OPTIONS, + ...options, + importOptions: { + ...DEFAULT_SOURCE_OPTIONS.importOptions, + ...(options?.importOptions ?? {}) + } + } + if (context.chapter === Chapter.FULL_JS) { + return fullJSRunner(program, context, theOptions) + } + context.variant = determineVariant(context, options) validateAndAnnotate(program, context) @@ -241,7 +256,7 @@ export async function sourceRunner( determineExecutionMethod(theOptions, context, program, isVerboseErrorsEnabled) if (context.executionMethod === 'native' && context.variant === Variant.NATIVE) { - return await fullJSRunner(program, context, theOptions) + return fullJSRunner(program, context, theOptions) } // All runners after this point evaluate the prelude. @@ -286,7 +301,7 @@ export async function sourceFilesRunner( ): Promise { const entrypointCode = files[entrypointFilePath] if (entrypointCode === undefined) { - context.errors.push(new CannotFindModuleError(entrypointFilePath)) + context.errors.push(new ModuleNotFoundError(entrypointFilePath)) return resolvedErrorPromise } From 31240839b41f9181a1bea0b8fc94b710c2a7644f Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Wed, 10 May 2023 00:50:57 +0800 Subject: [PATCH 31/95] Relocate modules preprocessor --- .../__snapshots__/preprocessor.ts.snap | 44 ++ .../preprocessor/__tests__/analyzer.ts | 401 ++++++++++++++++ .../preprocessor/__tests__/directedGraph.ts | 142 ++++++ .../preprocessor/__tests__/errorMessages.ts | 211 +++++++++ .../preprocessor/__tests__/preprocessor.ts | 427 +++++++++++++++++ .../hoistAndMergeImports.ts.snap | 21 + .../transformers/hoistAndMergeImports.ts | 83 ++++ .../transformProgramToFunctionDeclaration.ts | 435 ++++++++++++++++++ src/modules/preprocessor/__tests__/utils.ts | 63 +++ src/modules/preprocessor/analyzer.ts | 130 ++++++ .../constructors/baseConstructors.ts | 132 ++++++ .../contextSpecificConstructors.ts | 108 +++++ src/modules/preprocessor/directedGraph.ts | 230 +++++++++ src/modules/preprocessor/filePaths.ts | 107 +++++ src/modules/preprocessor/index.ts | 375 +++++++++++++++ .../transformers/hoistAndMergeImports.ts | 85 ++++ .../transformers/removeImportsAndExports.ts | 32 ++ .../transformProgramToFunctionDeclaration.ts | 331 +++++++++++++ 18 files changed, 3357 insertions(+) create mode 100644 src/modules/preprocessor/__tests__/__snapshots__/preprocessor.ts.snap create mode 100644 src/modules/preprocessor/__tests__/analyzer.ts create mode 100644 src/modules/preprocessor/__tests__/directedGraph.ts create mode 100644 src/modules/preprocessor/__tests__/errorMessages.ts create mode 100644 src/modules/preprocessor/__tests__/preprocessor.ts create mode 100644 src/modules/preprocessor/__tests__/transformers/__snapshots__/hoistAndMergeImports.ts.snap create mode 100644 src/modules/preprocessor/__tests__/transformers/hoistAndMergeImports.ts create mode 100644 src/modules/preprocessor/__tests__/transformers/transformProgramToFunctionDeclaration.ts create mode 100644 src/modules/preprocessor/__tests__/utils.ts create mode 100644 src/modules/preprocessor/analyzer.ts create mode 100644 src/modules/preprocessor/constructors/baseConstructors.ts create mode 100644 src/modules/preprocessor/constructors/contextSpecificConstructors.ts create mode 100644 src/modules/preprocessor/directedGraph.ts create mode 100644 src/modules/preprocessor/filePaths.ts create mode 100644 src/modules/preprocessor/index.ts create mode 100644 src/modules/preprocessor/transformers/hoistAndMergeImports.ts create mode 100644 src/modules/preprocessor/transformers/removeImportsAndExports.ts create mode 100644 src/modules/preprocessor/transformers/transformProgramToFunctionDeclaration.ts diff --git a/src/modules/preprocessor/__tests__/__snapshots__/preprocessor.ts.snap b/src/modules/preprocessor/__tests__/__snapshots__/preprocessor.ts.snap new file mode 100644 index 000000000..215bf9acb --- /dev/null +++ b/src/modules/preprocessor/__tests__/__snapshots__/preprocessor.ts.snap @@ -0,0 +1,44 @@ +// Jest Snapshot v1, https://goo.gl/fbAQLP + +exports[`preprocessFileImports collates Source module imports at the start of the top-level environment of the preprocessed program 1`] = ` +"import {w, x, y, z} from \\"one_module\\"; +import {f, g} from \\"other_module\\"; +import {h} from \\"another_module\\"; +import {w, x, y, z} from \\"one_module\\"; +import {f, g} from \\"other_module\\"; +import {h} from \\"another_module\\"; +function __$b$$dot$$js__(___$c$$dot$$js___) { + const square = __access_export__(___$c$$dot$$js___, \\"square\\"); + const b = square(5); + return pair(null, list(pair(\\"b\\", b))); +} +function __$c$$dot$$js__() { + const square = x => x * x; + return pair(null, list(pair(\\"square\\", square))); +} +const ___$c$$dot$$js___ = __$c$$dot$$js__(); +const ___$b$$dot$$js___ = __$b$$dot$$js__(___$c$$dot$$js___); +const b = __access_export__(___$b$$dot$$js___, \\"b\\"); +b; +" +`; + +exports[`preprocessFileImports ignores Source module imports & removes all non-Source module import-related AST nodes in the preprocessed program 1`] = ` +"import d, {a, b, c} from \\"one_module\\"; +import d, {a, b, c} from \\"one_module\\"; +function __$not$$dash$$source$$dash$$module$$dot$$js__() { + const x = 1; + const y = 2; + const z = 3; + function square(x) { + return x * x; + } + return pair(square, list(pair(\\"x\\", x), pair(\\"y\\", y), pair(\\"z\\", z))); +} +const ___$not$$dash$$source$$dash$$module$$dot$$js___ = __$not$$dash$$source$$dash$$module$$dot$$js__(); +const w = __access_export__(___$not$$dash$$source$$dash$$module$$dot$$js___, \\"default\\"); +const x = __access_export__(___$not$$dash$$source$$dash$$module$$dot$$js___, \\"x\\"); +const y = __access_export__(___$not$$dash$$source$$dash$$module$$dot$$js___, \\"y\\"); +const z = __access_export__(___$not$$dash$$source$$dash$$module$$dot$$js___, \\"z\\"); +" +`; diff --git a/src/modules/preprocessor/__tests__/analyzer.ts b/src/modules/preprocessor/__tests__/analyzer.ts new file mode 100644 index 000000000..ffb2a1c54 --- /dev/null +++ b/src/modules/preprocessor/__tests__/analyzer.ts @@ -0,0 +1,401 @@ +import createContext from '../../../createContext' +import { CircularImportError, ReexportSymbolError, UndefinedImportErrorBase } from '../../errors' +import { FatalSyntaxError } from '../../../parser/errors' +import { Chapter } from '../../../types' +import { stripIndent } from '../../../utils/formatters' +import validateImportAndExports from '../analyzer' +import { parseProgramsAndConstructImportGraph } from '..' + +type ErrorInfo = { + symbol?: string + line: number + col: number + moduleName: string +} + +async function testCode( + files: Partial>, + entrypointFilePath: string, + allowUndefinedImports: boolean +) { + const context = createContext(Chapter.FULL_JS) + const { programs, importGraph, moduleDocs } = await parseProgramsAndConstructImportGraph( + files, + entrypointFilePath, + context + ) + + // Return 'undefined' if there are errors while parsing. + if (context.errors.length !== 0) { + throw context.errors[0] + } + + // Check for circular imports. + const topologicalOrderResult = importGraph.getTopologicalOrder() + if (!topologicalOrderResult.isValidTopologicalOrderFound) { + throw new CircularImportError(topologicalOrderResult.firstCycleFound) + } + + try { + const fullTopoOrder = topologicalOrderResult.topologicalOrder + if (!fullTopoOrder.includes(entrypointFilePath)) { + fullTopoOrder.push(entrypointFilePath) + } + validateImportAndExports(moduleDocs, programs, fullTopoOrder, allowUndefinedImports) + } catch (error) { + throw error + } + return true +} + +describe('Test throwing import validation errors', () => { + async function testFailure( + files: Partial>, + entrypointFilePath: string, + allowUndefinedImports: boolean, + errInfo: ErrorInfo + ) { + let err: any = null + try { + await testCode(files, entrypointFilePath, allowUndefinedImports) + } catch (error) { + err = error + } + + expect(err).toBeInstanceOf(UndefinedImportErrorBase) + expect(err.moduleName).toEqual(errInfo.moduleName) + if (errInfo.symbol) { + expect(err.symbol).toEqual(errInfo.symbol) + } + expect(err.location.start).toMatchObject({ + line: errInfo.line, + column: errInfo.col + }) + } + + function testSuccess( + files: Partial>, + entrypointFilePath: string, + allowUndefinedImports: boolean + ) { + return expect(testCode(files, entrypointFilePath, allowUndefinedImports)).resolves.toEqual(true) + } + + function testCases( + desc: string, + cases: [ + files: Partial>, + entrypointFilePath: string, + trueError: false | ErrorInfo, + falseError: false | ErrorInfo + ][] + ) { + describe(desc, () => { + test.each( + cases.flatMap(([files, entry, trueError, falseError], i) => { + return [ + [`Test Case ${i} with allowedUndefinedImports true`, files, entry, true, trueError], + [`Test Case ${i} with allowedUndefinedImports false`, files, entry, false, falseError] + ] + }) + )('%s', async (_, files, entrypointFilePath, allowUndefined, error) => { + if (error !== false) { + await testFailure(files, entrypointFilePath, allowUndefined, error) + } else { + await testSuccess(files, entrypointFilePath, allowUndefined) + } + }) + }) + } + + describe('Test regular imports', () => { + testCases('Local imports', [ + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a } from "./a.js"; + + export function b() { + return a; + } + ` + }, + '/b.js', + false, + false + ], + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a, unknown } from "./a.js"; + + export function b() { + return a; + } + ` + }, + '/b.js', + false, + { moduleName: '/a.js', line: 1, col: 12, symbol: 'unknown' } + ] + ]) + + testCases('Source imports', [ + [ + { + '/a.js': stripIndent` + import { foo, bar } from "one_module"; + export function b() { + return foo(); + } + ` + }, + '/a.js', + false, + false + ], + [ + { + '/a.js': stripIndent` + import { foo, bar } from "one_module"; + export function b() { + return foo(); + } + ` + }, + '/a.js', + false, + false + ] + ]) + + testCases('Source and Local imports', [ + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a } from "./a.js"; + import { bar } from 'one_module'; + + export function b() { + bar(); + return a; + } + ` + }, + '/b.js', + false, + false + ], + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a } from "./a.js"; + import { unknown } from 'one_module'; + + export function b() { + unknown(); + return a; + } + ` + }, + '/b.js', + false, + { moduleName: 'one_module', line: 2, col: 9, symbol: 'unknown' } + ], + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a, unknown } from "./a.js"; + import { foo } from 'one_module'; + + export function b() { + foo(); + return a; + } + ` + }, + '/b.js', + false, + { moduleName: '/a.js', line: 1, col: 12, symbol: 'unknown' } + ] + ]) + }) + + describe('Test default imports', () => { + testCases('Local imports', [ + [ + { + '/a.js': 'const a = "a"; export default a;', + '/b.js': stripIndent` + import a from "./a.js"; + + export function b() { + return a; + } + ` + }, + '/b.js', + false, + false + ], + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import unknown, { a } from "./a.js"; + + export function b() { + return a; + } + ` + }, + '/b.js', + false, + { moduleName: '/a.js', line: 1, col: 7 } + ] + ]) + + testCases('Source imports', [ + [ + { + '/a.js': stripIndent` + import foo from "one_module"; + export function b() { + return foo(); + } + ` + }, + '/a.js', + false, + { moduleName: 'one_module', line: 1, col: 7 } + ] + ]) + + testCases('Source and Local imports', [ + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a } from "./a.js"; + import { bar } from 'one_module'; + + export function b() { + bar(); + return a; + } + ` + }, + '/b.js', + false, + false + ], + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a } from "./a.js"; + import { unknown } from 'one_module'; + + export function b() { + unknown(); + return a; + } + ` + }, + '/b.js', + false, + { moduleName: 'one_module', line: 2, col: 9, symbol: 'unknown' } + ], + [ + { + '/a.js': 'export const a = "a";', + '/b.js': stripIndent` + import { a, unknown } from "./a.js"; + import { foo } from 'one_module'; + + export function b() { + foo(); + return a; + } + ` + }, + '/b.js', + false, + { moduleName: '/a.js', line: 1, col: 12, symbol: 'unknown' } + ] + ]) + }) +}) + +describe('Test reexport symbol errors', () => { + function expectFailure( + files: Partial>, + entrypointFilePath: string, + obj: any + ) { + return expect(testCode(files, entrypointFilePath, false)).rejects.toBeInstanceOf(obj) + } + + describe('Duplicate named exports', () => + test.each([ + [ + 'Duplicate named exports within the same file', + `export function a() {}; export { a } from '/b.js'` + ], + [ + 'Duplicate named exports within the same file with aliasing', + `export function a() {}; export { b as a } from '/b.js'` + ], + [ + 'Duplicate default local exports within the same file', + `export default function a() {}; export { b as default } from '/b.js'` + ], + [ + 'Duplicate named local exports across multiple files', + { + '/a.js': 'export const a = 5; export { a } from "./b.js";', + '/b.js': 'export const a = 6;' + } + ], + [ + 'Duplicate named local and source exports', + 'export const a = 5; export { foo as a } from "one_module";' + ], + [ + 'Duplicate default local and source exports', + 'export default function a() {}; export { foo as default } from "one_module";' + ] + ])('%# %s', (_, code) => { + const files = typeof code === 'string' ? { '/a.js': code } : code + return expectFailure(files, '/a.js', FatalSyntaxError) + })) + + describe('Duplicate ExportAll declarations', () => + test.each([ + [ + 'Duplicate named local exports', + { + '/a.js': 'export const foo_a = 5; export * from "/b.js";', + '/b.js': 'export const foo_a = 5;' + } + ], + [ + 'Duplicate default local exports', + { + '/a.js': 'export default function a() {}; export * from "/b.js";', + '/b.js': 'export default function b() {};' + } + ], + [ + 'Duplicate named local and source exports', + { + '/a.js': 'export const foo = 5; export * from "one_module";' + } + ] + ])('%# %s', (_, files) => expectFailure(files, '/a.js', ReexportSymbolError))) +}) diff --git a/src/modules/preprocessor/__tests__/directedGraph.ts b/src/modules/preprocessor/__tests__/directedGraph.ts new file mode 100644 index 000000000..9e4563638 --- /dev/null +++ b/src/modules/preprocessor/__tests__/directedGraph.ts @@ -0,0 +1,142 @@ +import { DirectedGraph } from '../directedGraph' + +describe('addEdge', () => { + it('throws an error if the source and destination nodes are the same', () => { + const graph = new DirectedGraph() + expect(() => graph.addEdge('A', 'A')).toThrowError( + 'Edges that connect a node to itself are not allowed.' + ) + }) +}) + +describe('hasEdge', () => { + it('returns false if the edge does not exist in the graph', () => { + const graph = new DirectedGraph() + expect(graph.hasEdge('A', 'B')).toBe(false) + }) + + it('returns false if the reversed edge exists in the graph, but not the edge itself', () => { + const graph = new DirectedGraph() + graph.addEdge('B', 'A') + expect(graph.hasEdge('A', 'B')).toBe(false) + }) + + it('returns true if the edge exists in the graph', () => { + const graph = new DirectedGraph() + graph.addEdge('A', 'B') + expect(graph.hasEdge('A', 'B')).toBe(true) + }) +}) + +describe('Topological ordering', () => { + it('returns the first cycle found when the graph is not acyclic 1', () => { + const graph = new DirectedGraph() + graph.addEdge('A', 'B') + graph.addEdge('B', 'C') + graph.addEdge('C', 'D') + graph.addEdge('D', 'E') + graph.addEdge('E', 'B') + + const topologicalOrderResult = graph.getTopologicalOrder() + expect(topologicalOrderResult.isValidTopologicalOrderFound).toBe(false) + expect([ + ['B', 'C', 'D', 'E', 'B'], + ['C', 'D', 'E', 'B', 'C'], + ['D', 'E', 'B', 'C', 'D'], + ['E', 'B', 'C', 'D', 'E'] + ]).toContainEqual(topologicalOrderResult.firstCycleFound) + }) + + it('returns the first cycle found when the graph is not acyclic 2', () => { + const graph = new DirectedGraph() + graph.addEdge('A', 'B') + graph.addEdge('B', 'C') + graph.addEdge('C', 'A') + graph.addEdge('C', 'D') + graph.addEdge('D', 'E') + graph.addEdge('E', 'C') + + const topologicalOrderResult = graph.getTopologicalOrder() + expect(topologicalOrderResult.isValidTopologicalOrderFound).toBe(false) + expect([ + ['A', 'B', 'C', 'A'], + ['B', 'C', 'A', 'B'], + ['C', 'A', 'B', 'C'], + ['C', 'D', 'E', 'C'], + ['D', 'E', 'C', 'D'], + ['E', 'C', 'D', 'E'] + ]).toContainEqual(topologicalOrderResult.firstCycleFound) + }) + + it('returns the first cycle found when the graph is not acyclic 3', () => { + const graph = new DirectedGraph() + graph.addEdge('A', 'B') + graph.addEdge('B', 'C') + graph.addEdge('C', 'A') + graph.addEdge('A', 'D') + graph.addEdge('D', 'C') + + const topologicalOrderResult = graph.getTopologicalOrder() + expect(topologicalOrderResult.isValidTopologicalOrderFound).toBe(false) + expect([ + ['A', 'B', 'C', 'A'], + ['B', 'C', 'A', 'B'], + ['C', 'A', 'B', 'C'], + ['A', 'D', 'C', 'A'], + ['D', 'C', 'A', 'D'], + ['C', 'A', 'D', 'C'] + ]).toContainEqual(topologicalOrderResult.firstCycleFound) + }) + + it('returns an empty array when the graph has no nodes', () => { + const graph = new DirectedGraph() + + const topologicalOrderResult = graph.getTopologicalOrder() + expect(topologicalOrderResult.isValidTopologicalOrderFound).toBe(true) + expect(topologicalOrderResult.topologicalOrder).toEqual([]) + }) + + it('returns a topological ordering if the graph is acyclic 1', () => { + const graph = new DirectedGraph() + graph.addEdge('A', 'B') + graph.addEdge('B', 'C') + graph.addEdge('C', 'D') + graph.addEdge('D', 'E') + + const topologicalOrderResult = graph.getTopologicalOrder() + expect(topologicalOrderResult.isValidTopologicalOrderFound).toBe(true) + expect(topologicalOrderResult.topologicalOrder).toEqual(['A', 'B', 'C', 'D', 'E']) + }) + + it('returns a topological ordering if the graph is acyclic 2', () => { + const graph = new DirectedGraph() + graph.addEdge('A', 'B') + graph.addEdge('A', 'C') + graph.addEdge('B', 'D') + graph.addEdge('C', 'D') + + const topologicalOrderResult = graph.getTopologicalOrder() + expect(topologicalOrderResult.isValidTopologicalOrderFound).toBe(true) + expect([ + ['A', 'B', 'C', 'D'], + ['A', 'C', 'B', 'D'] + ]).toContainEqual(topologicalOrderResult.topologicalOrder) + }) + + it('returns a topological ordering if the graph is acyclic 3', () => { + const graph = new DirectedGraph() + graph.addEdge('A', 'B') + graph.addEdge('C', 'D') + + const topologicalOrderResult = graph.getTopologicalOrder() + expect(topologicalOrderResult.isValidTopologicalOrderFound).toBe(true) + expect([ + ['A', 'B', 'C', 'D'], + ['A', 'C', 'B', 'D'], + ['A', 'C', 'D', 'B'], + ['C', 'A', 'B', 'D'], + ['C', 'A', 'D', 'B'], + ['C', 'D', 'A', 'B'] + ]).toContainEqual(topologicalOrderResult.topologicalOrder) + }) +}) diff --git a/src/modules/preprocessor/__tests__/errorMessages.ts b/src/modules/preprocessor/__tests__/errorMessages.ts new file mode 100644 index 000000000..e298f18f4 --- /dev/null +++ b/src/modules/preprocessor/__tests__/errorMessages.ts @@ -0,0 +1,211 @@ +import { parseError, runFilesInContext } from '../../..' +import { mockContext } from '../../../mocks/context' +import { Chapter, Variant } from './../../../types' + +describe('syntax errors', () => { + let context = mockContext(Chapter.SOURCE_4) + + beforeEach(() => { + context = mockContext(Chapter.SOURCE_4) + }) + + describe('FatalSyntaxError', () => { + test('file path is not part of error message if the program is single-file', async () => { + const files: Record = { + '/a.js': ` + const x = 1; + const x = 1; + ` + } + await runFilesInContext(files, '/a.js', context) + expect(parseError(context.errors)).toMatchInlineSnapshot( + `"Line 3: SyntaxError: Identifier 'x' has already been declared (3:16)"` + ) + }) + + test('file path is part of error message if the program is multi-file', async () => { + const files: Record = { + '/a.js': ` + const x = 1; + const x = 1; + `, + '/b.js': ` + const y = 2; + ` + } + await runFilesInContext(files, '/a.js', context) + expect(parseError(context.errors)).toMatchInlineSnapshot( + `"[/a.js] Line 3: SyntaxError: Identifier 'x' has already been declared (3:16)"` + ) + }) + }) + + describe('MissingSemicolonError', () => { + test('file path is not part of error message if the program is single-file', async () => { + const files: Record = { + '/a.js': ` + const x = 1 + ` + } + await runFilesInContext(files, '/a.js', context) + expect(parseError(context.errors)).toMatchInlineSnapshot( + `"Line 2: Missing semicolon at the end of statement"` + ) + }) + + test('file path is part of error message if the program is multi-file', async () => { + const files: Record = { + '/a.js': ` + const x = 1 + `, + '/b.js': ` + const y = 2; + ` + } + await runFilesInContext(files, '/a.js', context) + expect(parseError(context.errors)).toMatchInlineSnapshot( + `"[/a.js] Line 2: Missing semicolon at the end of statement"` + ) + }) + }) + + describe('TrailingCommaError', () => { + test('file path is not part of error message if the program is single-file', async () => { + const files: Record = { + '/a.js': ` + const x = [1, 2, 3,]; + ` + } + await runFilesInContext(files, '/a.js', context) + expect(parseError(context.errors)).toMatchInlineSnapshot(`"Line 2: Trailing comma"`) + }) + + test('file path is part of error message if the program is multi-file', async () => { + const files: Record = { + '/a.js': ` + const x = [1, 2, 3,]; + `, + '/b.js': ` + const y = 2; + ` + } + await runFilesInContext(files, '/a.js', context) + expect(parseError(context.errors)).toMatchInlineSnapshot(`"[/a.js] Line 2: Trailing comma"`) + }) + }) +}) + +describe('non-syntax errors (non-transpiled)', () => { + let context = mockContext(Chapter.SOURCE_4) + + beforeEach(() => { + context = mockContext(Chapter.SOURCE_4) + context.executionMethod = 'interpreter' + }) + + describe('SourceError', () => { + test('file path is not part of error message if the program is single-file', async () => { + const files: Record = { + '/a.js': ` + 1 + 'hello'; + ` + } + await runFilesInContext(files, '/a.js', context) + expect(parseError(context.errors)).toMatchInlineSnapshot( + `"Line 2: Expected number on right hand side of operation, got string."` + ) + }) + + test('file path is part of error message if the program is multi-file', async () => { + const files: Record = { + '/a.js': ` + 1 + 'hello'; + `, + '/b.js': ` + const y = 2; + ` + } + await runFilesInContext(files, '/a.js', context) + expect(parseError(context.errors)).toMatchInlineSnapshot( + `"[/a.js] Line 2: Expected number on right hand side of operation, got string."` + ) + }) + }) +}) + +describe('non-syntax errors (transpiled)', () => { + let context = mockContext(Chapter.SOURCE_4) + + beforeEach(() => { + context = mockContext(Chapter.SOURCE_4) + context.executionMethod = 'native' + }) + + describe('SourceError', () => { + test('file path is not part of error message if the program is single-file', async () => { + const files: Record = { + '/a.js': ` + 1 + 'hello'; + ` + } + await runFilesInContext(files, '/a.js', context) + expect(parseError(context.errors)).toMatchInlineSnapshot( + `"Line 2: Expected number on right hand side of operation, got string."` + ) + }) + + test('file path is part of error message if the program is multi-file', async () => { + const files: Record = { + '/a.js': ` + 1 + 'hello'; + `, + '/b.js': ` + const y = 2; + ` + } + await runFilesInContext(files, '/a.js', context) + expect(parseError(context.errors)).toMatchInlineSnapshot( + `"[/a.js] Line 2: Expected number on right hand side of operation, got string."` + ) + }) + }) +}) + +// We specifically test typed Source because it makes use of the Babel parser. +describe('non-syntax errors (non-transpiled & typed)', () => { + let context = mockContext(Chapter.SOURCE_4, Variant.TYPED) + + beforeEach(() => { + context = mockContext(Chapter.SOURCE_4, Variant.TYPED) + context.executionMethod = 'interpreter' + }) + + describe('SourceError', () => { + test('file path is not part of error message if the program is single-file', async () => { + const files: Record = { + '/a.js': ` + 2 + 'hello'; + ` + } + await runFilesInContext(files, '/a.js', context) + expect(parseError(context.errors)).toMatchInlineSnapshot( + `"Line 2: Type 'string' is not assignable to type 'number'."` + ) + }) + + test('file path is part of error message if the program is multi-file', async () => { + const files: Record = { + '/a.js': ` + 2 + 'hello'; + `, + '/b.js': ` + const y = 2; + ` + } + await runFilesInContext(files, '/a.js', context) + expect(parseError(context.errors)).toMatchInlineSnapshot( + `"[/a.js] Line 2: Type 'string' is not assignable to type 'number'."` + ) + }) + }) +}) diff --git a/src/modules/preprocessor/__tests__/preprocessor.ts b/src/modules/preprocessor/__tests__/preprocessor.ts new file mode 100644 index 000000000..f747bf4f0 --- /dev/null +++ b/src/modules/preprocessor/__tests__/preprocessor.ts @@ -0,0 +1,427 @@ +import { parseError } from '../../..' +import { mockContext } from '../../../mocks/context' +import { + accessExportFunctionName, + defaultExportLookupName +} from '../../../stdlib/localImport.prelude' +import { Chapter } from '../../../types' +import preprocessFileImports from '..' +import { parseCodeError, stripLocationInfo } from './utils' +import hoistAndMergeImports from '../transformers/hoistAndMergeImports' +import { generate } from 'astring' +import { Program } from 'estree' +import { parse } from '../../../parser/parser' + +// The preprocessor now checks for the existence of source modules +// so this is here to solve that issue + +/* +describe('getImportedLocalModulePaths', () => { + let context = mockContext(Chapter.LIBRARY_PARSER) + + beforeEach(() => { + context = mockContext(Chapter.LIBRARY_PARSER) + }) + + const assertCorrectModulePathsAreReturned = ( + code: string, + baseFilePath: string, + expectedModulePaths: string[] + ): void => { + const program = parse(code, context) + if (program === null) { + throw parseCodeError + } + expect(getImportedLocalModulePaths(program, baseFilePath)).toEqual(new Set(expectedModulePaths)) + } + + it('throws an error if the current file path is not absolute', () => { + const code = '' + const program = parse(code, context) + if (program === null) { + throw parseCodeError + } + expect(() => getImportedLocalModulePaths(program, 'a.js')).toThrowError( + "Current file path 'a.js' is not absolute." + ) + }) + + it('returns local (relative) module imports', () => { + const code = ` + import { x } from "./dir2/b.js"; + import { y } from "../dir3/c.js"; + ` + assertCorrectModulePathsAreReturned(code, '/dir/a.js', ['/dir/dir2/b.js', '/dir3/c.js']) + }) + + it('returns local (absolute) module imports', () => { + const code = ` + import { x } from "/dir/dir2/b.js"; + import { y } from "/dir3/c.js"; + ` + assertCorrectModulePathsAreReturned(code, '/dir/a.js', ['/dir/dir2/b.js', '/dir3/c.js']) + }) + + it('does not return Source module imports', () => { + const code = ` + import { x } from "rune"; + import { y } from "sound"; + ` + assertCorrectModulePathsAreReturned(code, '/dir/a.js', []) + }) + + it('gracefully handles overly long sequences of double dots (..)', () => { + const code = `import { x } from "../../../../../../../../../b.js"; + ` + assertCorrectModulePathsAreReturned(code, '/dir/a.js', ['/b.js']) + }) + + it('returns unique module paths', () => { + const code = ` + import { a } from "./b.js"; + import { b } from "./b.js"; + import { c } from "./c.js"; + import { d } from "./c.js"; + ` + assertCorrectModulePathsAreReturned(code, '/dir/a.js', ['/dir/b.js', '/dir/c.js']) + }) +}) +*/ + +describe('preprocessFileImports', () => { + let actualContext = mockContext(Chapter.LIBRARY_PARSER) + let expectedContext = mockContext(Chapter.LIBRARY_PARSER) + + beforeEach(() => { + actualContext = mockContext(Chapter.LIBRARY_PARSER) + expectedContext = mockContext(Chapter.LIBRARY_PARSER) + }) + + const assertASTsAreEquivalent = ( + actualProgram: Program | undefined, + expectedCode: string + ): void => { + // assert(actualProgram !== undefined, 'Actual program should not be undefined') + if (!actualProgram) { + // console.log(actualContext.errors[0], 'occurred at:', actualContext.errors[0].location.start) + throw new Error('Actual program should not be undefined!') + } + + const expectedProgram = parse(expectedCode, expectedContext) + if (expectedProgram === null) { + throw parseCodeError + } + + expect(stripLocationInfo(actualProgram)).toEqual(stripLocationInfo(expectedProgram)) + } + + const testAgainstSnapshot = (program: Program | undefined | null) => { + if (!program) { + throw parseCodeError + } + + hoistAndMergeImports(program, [program]) + + expect(generate(program)).toMatchSnapshot() + } + + it('returns undefined if the entrypoint file does not exist', async () => { + const files: Record = { + '/a.js': '1 + 2;' + } + const actualProgram = await preprocessFileImports(files, '/non-existent-file.js', actualContext) + expect(actualProgram).toBeUndefined() + }) + + it('returns the same AST if the entrypoint file does not contain import/export statements', async () => { + const files: Record = { + '/a.js': ` + function square(x) { + return x * x; + } + square(5); + ` + } + const expectedCode = files['/a.js'] + const actualProgram = await preprocessFileImports(files, '/a.js', actualContext) + assertASTsAreEquivalent(actualProgram, expectedCode) + }) + + it('removes all export-related AST nodes', async () => { + const files: Record = { + '/a.js': ` + export const x = 42; + export let y = 53; + export function square(x) { + return x * x; + } + export const id = x => x; + export default function cube(x) { + return x * x * x; + } + ` + } + const expectedCode = ` + const x = 42; + let y = 53; + function square(x) { + return x * x; + } + const id = x => x; + function cube(x) { + return x * x * x; + } + ` + const actualProgram = await preprocessFileImports(files, '/a.js', actualContext) + assertASTsAreEquivalent(actualProgram, expectedCode) + }) + + it('ignores Source module imports & removes all non-Source module import-related AST nodes in the preprocessed program', async () => { + const files: Record = { + '/a.js': ` + import d, { a, b, c } from "one_module"; + import w, { x, y, z } from "./not-source-module.js"; + `, + '/not-source-module.js': ` + export const x = 1; + export const y = 2; + export const z = 3; + export default function square(x) { + return x * x; + } + ` + } + // const expectedCode = ` + // import { a, b, c } from "one_module"; + + // function __$not$$dash$$source$$dash$$module$$dot$$js__() { + // const x = 1; + // const y = 2; + // const z = 3; + // function square(x) { + // return x * x; + // } + + // return pair(square, list(pair("x", x), pair("y", y), pair("z", z))); + // } + + // const ___$not$$dash$$source$$dash$$module$$dot$$js___ = __$not$$dash$$source$$dash$$module$$dot$$js__(); + + // const w = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "${defaultExportLookupName}"); + // const x = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "x"); + // const y = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "y"); + // const z = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "z"); + // ` + const actualProgram = await preprocessFileImports(files, '/a.js', actualContext, { + allowUndefinedImports: true + }) + testAgainstSnapshot(actualProgram) + // assertASTsAreEquivalent(actualProgram, expectedCode) + }) + + it('collates Source module imports at the start of the top-level environment of the preprocessed program', async () => { + const files: Record = { + '/a.js': ` + import { b } from "./b.js"; + import { w, x } from "one_module"; + import { f, g } from "other_module"; + + b; + `, + '/b.js': ` + import { square } from "./c.js"; + import { x, y } from "one_module"; + import { h } from "another_module"; + + export const b = square(5); + `, + '/c.js': ` + import { x, y, z } from "one_module"; + + export const square = x => x * x; + ` + } + // const expectedCode = ` + // import { w, x, y, z } from "one_module"; + // import { f, g } from "other_module"; + // import { h } from "another_module"; + + // function __$b$$dot$$js__(___$c$$dot$$js___) { + // const square = ${accessExportFunctionName}(___$c$$dot$$js___, "square"); + + // const b = square(5); + + // return pair(null, list(pair("b", b))); + // } + + // function __$c$$dot$$js__() { + // const square = x => x * x; + + // return pair(null, list(pair("square", square))); + // } + + // const ___$c$$dot$$js___ = __$c$$dot$$js__(); + // const ___$b$$dot$$js___ = __$b$$dot$$js__(___$c$$dot$$js___); + + // const b = ${accessExportFunctionName}(___$b$$dot$$js___, "b"); + + // b; + // ` + const actualProgram = await preprocessFileImports(files, '/a.js', actualContext, { + allowUndefinedImports: true + }) + testAgainstSnapshot(actualProgram) + // assertASTsAreEquivalent(actualProgram, expectedCode) + }) + + it('returns CircularImportError if there are circular imports', async () => { + const files: Record = { + '/a.js': ` + import { b } from "./b.js"; + + export const a = 1; + `, + '/b.js': ` + import { c } from "./c.js"; + + export const b = 2; + `, + '/c.js': ` + import { a } from "./a.js"; + + export const c = 3; + ` + } + await preprocessFileImports(files, '/a.js', actualContext) + expect(parseError(actualContext.errors)).toMatchInlineSnapshot( + `"Circular import detected: '/c.js' -> '/a.js' -> '/b.js' -> '/c.js'."` + ) + }) + + it('returns CircularImportError if there are circular imports - verbose', async () => { + const files: Record = { + '/a.js': ` + import { b } from "./b.js"; + + export const a = 1; + `, + '/b.js': ` + import { c } from "./c.js"; + + export const b = 2; + `, + '/c.js': ` + import { a } from "./a.js"; + + export const c = 3; + ` + } + await preprocessFileImports(files, '/a.js', actualContext) + expect(parseError(actualContext.errors, true)).toMatchInlineSnapshot(` + "Circular import detected: '/c.js' -> '/a.js' -> '/b.js' -> '/c.js'. + Break the circular import cycle by removing imports from any of the offending files. + " + `) + }) + + it('returns CircularImportError if there are self-imports', async () => { + const files: Record = { + '/a.js': ` + import { y } from "./a.js"; + const x = 1; + export { x as y }; + ` + } + await preprocessFileImports(files, '/a.js', actualContext) + expect(parseError(actualContext.errors)).toMatchInlineSnapshot( + `"Circular import detected: '/a.js' -> '/a.js'."` + ) + }) + + it('returns CircularImportError if there are self-imports - verbose', async () => { + const files: Record = { + '/a.js': ` + import { y } from "./a.js"; + const x = 1; + export { x as y }; + ` + } + await preprocessFileImports(files, '/a.js', actualContext) + expect(parseError(actualContext.errors, true)).toMatchInlineSnapshot(` + "Circular import detected: '/a.js' -> '/a.js'. + Break the circular import cycle by removing imports from any of the offending files. + " + `) + }) + + it('returns a preprocessed program with all imports', async () => { + const files: Record = { + '/a.js': ` + import { a as x, b as y } from "./b.js"; + + x + y; + `, + '/b.js': ` + import y, { square } from "./c.js"; + + const a = square(y); + const b = 3; + export { a, b }; + `, + '/c.js': ` + import { mysteryFunction } from "./d.js"; + + const x = mysteryFunction(5); + export function square(x) { + return x * x; + } + export default x; + `, + '/d.js': ` + const addTwo = x => x + 2; + export { addTwo as mysteryFunction }; + ` + } + const expectedCode = ` + function __$b$$dot$$js__(___$c$$dot$$js___) { + const y = ${accessExportFunctionName}(___$c$$dot$$js___, "${defaultExportLookupName}"); + const square = ${accessExportFunctionName}(___$c$$dot$$js___, "square"); + + const a = square(y); + const b = 3; + + return pair(null, list(pair("a", a), pair("b", b))); + } + + function __$c$$dot$$js__(___$d$$dot$$js___) { + const mysteryFunction = ${accessExportFunctionName}(___$d$$dot$$js___, "mysteryFunction"); + + const x = mysteryFunction(5); + function square(x) { + return x * x; + } + + return pair(x, list(pair("square", square))); + } + + function __$d$$dot$$js__() { + const addTwo = x => x + 2; + + return pair(null, list(pair("mysteryFunction", addTwo))); + } + + const ___$d$$dot$$js___ = __$d$$dot$$js__(); + const ___$c$$dot$$js___ = __$c$$dot$$js__(___$d$$dot$$js___); + const ___$b$$dot$$js___ = __$b$$dot$$js__(___$c$$dot$$js___); + + const x = ${accessExportFunctionName}(___$b$$dot$$js___, "a"); + const y = ${accessExportFunctionName}(___$b$$dot$$js___, "b"); + + x + y; + ` + const actualProgram = await preprocessFileImports(files, '/a.js', actualContext, { + allowUndefinedImports: true + }) + assertASTsAreEquivalent(actualProgram, expectedCode) + }) +}) diff --git a/src/modules/preprocessor/__tests__/transformers/__snapshots__/hoistAndMergeImports.ts.snap b/src/modules/preprocessor/__tests__/transformers/__snapshots__/hoistAndMergeImports.ts.snap new file mode 100644 index 000000000..0e387b4ca --- /dev/null +++ b/src/modules/preprocessor/__tests__/transformers/__snapshots__/hoistAndMergeImports.ts.snap @@ -0,0 +1,21 @@ +// Jest Snapshot v1, https://goo.gl/fbAQLP + +exports[`hoistAndMergeImports hoists import declarations to the top of the program 1`] = ` +"import x from \\"source-module\\"; +function square(x) { + return x * x; +} +import {a, b, c} from \\"./a.js\\"; +export {square}; +import x from \\"source-module\\"; +square(3); +" +`; + +exports[`hoistAndMergeImports merges import declarations from the same module 1`] = ` +"import {a, b, c} from \\"./a.js\\"; +import {d} from \\"./a.js\\"; +import {x} from \\"./b.js\\"; +import {e, f} from \\"./a.js\\"; +" +`; diff --git a/src/modules/preprocessor/__tests__/transformers/hoistAndMergeImports.ts b/src/modules/preprocessor/__tests__/transformers/hoistAndMergeImports.ts new file mode 100644 index 000000000..afcaa70fd --- /dev/null +++ b/src/modules/preprocessor/__tests__/transformers/hoistAndMergeImports.ts @@ -0,0 +1,83 @@ +import { generate } from 'astring' +import { mockContext } from '../../../../mocks/context' +import { parse } from '../../../../parser/parser' +import { Chapter } from '../../../../types' +import hoistAndMergeImports from '../../transformers/hoistAndMergeImports' +import { parseCodeError } from '../utils' + +describe('hoistAndMergeImports', () => { + let actualContext = mockContext(Chapter.LIBRARY_PARSER) + // let expectedContext = mockContext(Chapter.LIBRARY_PARSER) + + beforeEach(() => { + actualContext = mockContext(Chapter.LIBRARY_PARSER) + // expectedContext = mockContext(Chapter.LIBRARY_PARSER) + }) + + // const assertASTsAreEquivalent = (actualCode: string, expectedCode: string): void => { + // const actualProgram = parse(actualCode, actualContext) + // const expectedProgram = parse(expectedCode, expectedContext) + // if (actualProgram === null || expectedProgram === null) { + // throw parseCodeError + // } + + // hoistAndMergeImports(actualProgram, [actualProgram]) + // expect(stripLocationInfo(actualProgram)).toEqual(stripLocationInfo(expectedProgram)) + // } + + const testAgainstSnapshot = (code: string) => { + const program = parse(code, actualContext) + if (program === null) { + throw parseCodeError + } + + hoistAndMergeImports(program, [program]) + expect(generate(program)).toMatchSnapshot() + } + + test('hoists import declarations to the top of the program', () => { + const actualCode = ` + function square(x) { + return x * x; + } + + import { a, b, c } from "./a.js"; + + export { square }; + + import x from "source-module"; + + square(3); + ` + testAgainstSnapshot(actualCode) + // const expectedCode = ` + // import { a, b, c } from "./a.js"; + // import x from "source-module"; + + // function square(x) { + // return x * x; + // } + + // export { square }; + + // square(3); + // ` + // assertASTsAreEquivalent(actualCode, expectedCode) + }) + + test('merges import declarations from the same module', () => { + const actualCode = ` + import { a, b, c } from "./a.js"; + import { d } from "./a.js"; + import { x } from "./b.js"; + import { e, f } from "./a.js"; + ` + + testAgainstSnapshot(actualCode) + // const expectedCode = ` + // import { a, b, c, d, e, f } from "./a.js"; + // import { x } from "./b.js"; + // ` + // assertASTsAreEquivalent(actualCode, expectedCode) + }) +}) diff --git a/src/modules/preprocessor/__tests__/transformers/transformProgramToFunctionDeclaration.ts b/src/modules/preprocessor/__tests__/transformers/transformProgramToFunctionDeclaration.ts new file mode 100644 index 000000000..50df9c4b0 --- /dev/null +++ b/src/modules/preprocessor/__tests__/transformers/transformProgramToFunctionDeclaration.ts @@ -0,0 +1,435 @@ +import { mockContext } from '../../../../mocks/context' +import { parse } from '../../../../parser/parser' +import { defaultExportLookupName } from '../../../../stdlib/localImport.prelude' +import { Chapter } from '../../../../types' +import { transformProgramToFunctionDeclaration } from '../../transformers/transformProgramToFunctionDeclaration' +import { parseCodeError, stripLocationInfo } from '../utils' + +describe('transformImportedFile', () => { + const currentFileName = '/dir/a.js' + const functionName = '__$dir$a$$dot$$js__' + let actualContext = mockContext(Chapter.LIBRARY_PARSER) + let expectedContext = mockContext(Chapter.LIBRARY_PARSER) + + beforeEach(() => { + actualContext = mockContext(Chapter.LIBRARY_PARSER) + expectedContext = mockContext(Chapter.LIBRARY_PARSER) + }) + + const assertASTsAreEquivalent = (actualCode: string, expectedCode: string): void => { + const actualProgram = parse(actualCode, actualContext) + const expectedProgram = parse(expectedCode, expectedContext) + if (actualProgram === null || expectedProgram === null) { + throw parseCodeError + } + + const actualFunctionDeclaration = transformProgramToFunctionDeclaration( + actualProgram, + currentFileName + ) + const expectedFunctionDeclaration = expectedProgram.body[0] + expect(expectedFunctionDeclaration.type).toEqual('FunctionDeclaration') + expect(stripLocationInfo(actualFunctionDeclaration)).toEqual( + stripLocationInfo(expectedFunctionDeclaration) + ) + } + + it('wraps the program body in a FunctionDeclaration', () => { + const actualCode = ` + const square = x => x * x; + const x = 42; + ` + const expectedCode = ` + function ${functionName}() { + const square = x => x * x; + const x = 42; + + return pair(null, list()); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('returns only exported variables', () => { + const actualCode = ` + const x = 42; + export let y = 53; + ` + const expectedCode = ` + function ${functionName}() { + const x = 42; + let y = 53; + + return pair(null, list(pair("y", y))); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('returns only exported functions', () => { + const actualCode = ` + function id(x) { + return x; + } + export function square(x) { + return x * x; + } + ` + const expectedCode = ` + function ${functionName}() { + function id(x) { + return x; + } + function square(x) { + return x * x; + } + + return pair(null, list(pair("square", square))); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('returns only exported arrow functions', () => { + const actualCode = ` + const id = x => x; + export const square = x => x * x; + ` + const expectedCode = ` + function ${functionName}() { + const id = x => x; + const square = x => x * x; + + return pair(null, list(pair("square", square))); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('returns all exported names when there are multiple', () => { + const actualCode = ` + export const x = 42; + export let y = 53; + export function id(x) { + return x; + } + export const square = x => x * x; + ` + const expectedCode = ` + function ${functionName}() { + const x = 42; + let y = 53; + function id(x) { + return x; + } + const square = x => x * x; + + return pair(null, list(pair("x", x), pair("y", y), pair("id", id), pair("square", square))); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('returns all exported names in {}-notation', () => { + const actualCode = ` + const x = 42; + let y = 53; + function id(x) { + return x; + } + const square = x => x * x; + export { x, y, id, square }; + ` + const expectedCode = ` + function ${functionName}() { + const x = 42; + let y = 53; + function id(x) { + return x; + } + const square = x => x * x; + + return pair(null, list(pair("x", x), pair("y", y), pair("id", id), pair("square", square))); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('returns renamed exported names', () => { + const actualCode = ` + const x = 42; + let y = 53; + function id(x) { + return x; + } + const square = x => x * x; + export { x as y, y as x, id as identity, square as sq }; + ` + const expectedCode = ` + function ${functionName}() { + const x = 42; + let y = 53; + function id(x) { + return x; + } + const square = x => x * x; + + return pair(null, list(pair("y", x), pair("x", y), pair("identity", id), pair("sq", square))); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + // Default exports of variable declarations and arrow function declarations + // is not allowed in ES6, and will be caught by the Acorn parser. + it('returns default export of function declaration', () => { + const actualCode = ` + function id(x) { + return x; + } + export default function square(x) { + return x * x; + } + ` + const expectedCode = ` + function ${functionName}() { + function id(x) { + return x; + } + function square(x) { + return x * x; + } + + return pair(square, list()); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('returns default export of variable', () => { + const actualCode = ` + const x = 42; + let y = 53; + export default y; + ` + const expectedCode = ` + function ${functionName}() { + const x = 42; + let y = 53; + + return pair(y, list()); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('returns default export of function', () => { + const actualCode = ` + function id(x) { + return x; + } + function square(x) { + return x * x; + } + export default square; + ` + const expectedCode = ` + function ${functionName}() { + function id(x) { + return x; + } + function square(x) { + return x * x; + } + + return pair(square, list()); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('returns default export of arrow function', () => { + const actualCode = ` + const id = x => x; + const square = x => x * x; + export default square; + ` + const expectedCode = ` + function ${functionName}() { + const id = x => x; + const square = x => x * x; + + return pair(square, list()); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('returns default export of expression 1', () => { + const actualCode = ` + export default 123; + ` + const expectedCode = ` + function ${functionName}() { + return pair(123, list()); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('returns default export of expression 2', () => { + const actualCode = ` + export default "Hello world!"; + ` + const expectedCode = ` + function ${functionName}() { + return pair("Hello world!", list()); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('returns default export of expression 3', () => { + const actualCode = ` + export default 123 + 456; + ` + const expectedCode = ` + function ${functionName}() { + // Expressions will be reduced when the function is invoked. + return pair(123 + 456, list()); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('returns default export of expression 4', () => { + const actualCode = ` + function square(x) { + return x * x; + } + export default square(10); + ` + const expectedCode = ` + function ${functionName}() { + function square(x) { + return x * x; + } + + // Expressions will be reduced when the function is invoked. + return pair(square(10), list()); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('returns default export in {}-notation', () => { + const actualCode = ` + const x = 42; + let y = 53; + function square(x) { + return x * x; + } + const id = x => x; + export { x, y, square as default, id }; + ` + const expectedCode = ` + function ${functionName}() { + const x = 42; + let y = 53; + function square(x) { + return x * x; + } + const id = x => x; + + return pair(square, list(pair("x", x), pair("y", y), pair("id", id))); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('handles named imports of local (non-Source) modules', () => { + const actualCode = ` + import { x } from "./b.js"; + import { y } from "../dir2/c.js"; + ` + const expectedCode = ` + function ${functionName}(___$dir$b$$dot$$js___, ___$dir2$c$$dot$$js___) { + const x = __access_export__(___$dir$b$$dot$$js___, "x"); + const y = __access_export__(___$dir2$c$$dot$$js___, "y"); + + return pair(null, list()); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('handles default imports of local (non-Source) modules', () => { + const actualCode = ` + import x from "./b.js"; + import y from "../dir2/c.js"; + ` + const expectedCode = ` + function ${functionName}(___$dir$b$$dot$$js___, ___$dir2$c$$dot$$js___) { + const x = __access_export__(___$dir$b$$dot$$js___, "${defaultExportLookupName}"); + const y = __access_export__(___$dir2$c$$dot$$js___, "${defaultExportLookupName}"); + + return pair(null, list()); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('limits resolved file paths to the root of the file system `/`', () => { + const actualCode = ` + import { x } from "../../../../../../../../../dir/b.js"; + import { y } from "../../../../../dir2/c.js"; + ` + const expectedCode = ` + function ${functionName}(___$dir$b$$dot$$js___, ___$dir2$c$$dot$$js___) { + const x = __access_export__(___$dir$b$$dot$$js___, "x"); + const y = __access_export__(___$dir2$c$$dot$$js___, "y"); + + return pair(null, list()); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('merges file paths that resolve to the same file', () => { + const actualCode = ` + import { x } from "./b.js"; + import { y } from "../dir/b.js"; + ` + const expectedCode = ` + function ${functionName}(___$dir$b$$dot$$js___) { + const x = __access_export__(___$dir$b$$dot$$js___, "x"); + const y = __access_export__(___$dir$b$$dot$$js___, "y"); + + return pair(null, list()); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) + + it('handles named imports of local (non-Source) modules when split across multiple import declarations', () => { + const actualCode = ` + import { x } from "./b.js"; + import { y } from "./b.js"; + import { z } from "./b.js"; + + export const a = x + y + z; + ` + const expectedCode = ` + function ${functionName}(___$dir$b$$dot$$js___) { + const x = __access_export__(___$dir$b$$dot$$js___, "x"); + const y = __access_export__(___$dir$b$$dot$$js___, "y"); + const z = __access_export__(___$dir$b$$dot$$js___, "z"); + + const a = x + y + z; + + return pair(null, list(pair("a", a))); + } + ` + assertASTsAreEquivalent(actualCode, expectedCode) + }) +}) diff --git a/src/modules/preprocessor/__tests__/utils.ts b/src/modules/preprocessor/__tests__/utils.ts new file mode 100644 index 000000000..85b9d798b --- /dev/null +++ b/src/modules/preprocessor/__tests__/utils.ts @@ -0,0 +1,63 @@ +import es from 'estree' + +import { full, simple } from '../../../utils/ast/walkers' + +export const parseCodeError = new Error('Unable to parse code') + +/** + * Strips out location information from an AST. + * + * The local imports test suites only care about the structure of the + * transformed AST. The line & column numbers, as well as the character + * offsets of each node in the ASTs derived from parsing the pre-transform + * code & the equivalent post-transform code will not be the same. + * Note that it is insufficient to pass in 'locations: false' into the acorn + * parser as there will still be 'start' & 'end' properties attached to nodes + * which represent character offsets. + * + * WARNING: Since this function is only used for test suites, it mutates + * the original AST for convenience instead of creating a copy. + * + * @param node The AST which should be stripped of location information. + */ +export const stripLocationInfo = (node: es.Node): es.Node => { + // The 'start' & 'end' properties are not typed in ESTree, but they exist + // on some nodes in the AST generated by acorn parser. + const deleteLocationProperties = (node: es.Node & { start?: number; end?: number }): void => { + // Line & column numbers + delete node.loc + // Character offsets + delete node.start + delete node.end + } + full(node, (node: es.Node): void => { + deleteLocationProperties(node) + }) + // Unfortunately, acorn-walk does not actually visit all nodes in the AST. + // Namely, Identifier nodes are not visited except when they occur as expressions. + // According to a maintainer of acorn-walk, users of the library are expected to + // read Identifier nodes from their parent node if there is a need to do so, + // although it was not explained why this is the case. + // See https://github.com/acornjs/acorn/issues/1180 for the discussion. + // + // As a workaround, we walk through the AST again specifically to strip the + // location information out of Identifier nodes. + // NOTE: This second walk does not exhaustively visit all Identifier nodes. + // Please add custom walkers as needed. + simple(node, { + ImportSpecifier(node: es.ImportSpecifier): void { + deleteLocationProperties(node.local) + deleteLocationProperties(node.imported) + }, + ImportDefaultSpecifier(node: es.ImportDefaultSpecifier): void { + deleteLocationProperties(node.local) + }, + ExportNamedDeclaration(node: es.ExportNamedDeclaration): void { + node.specifiers.forEach((node: es.ExportSpecifier) => { + deleteLocationProperties(node) + deleteLocationProperties(node.exported) + }) + } + }) + return node +} diff --git a/src/modules/preprocessor/analyzer.ts b/src/modules/preprocessor/analyzer.ts new file mode 100644 index 000000000..8ac7aec0e --- /dev/null +++ b/src/modules/preprocessor/analyzer.ts @@ -0,0 +1,130 @@ +import type * as es from 'estree' + +import { + ReexportSymbolError, + UndefinedDefaultImportError, + UndefinedImportError, + UndefinedNamespaceImportError +} from '../../modules/errors' +import ArrayMap from '../../utils/arrayMap' +import { extractIdsFromPattern } from '../../utils/ast/astUtils' +import { simple } from '../../utils/ast/walkers' + +const validateDefaultImport = ( + spec: es.ImportDefaultSpecifier | es.ExportSpecifier | es.ImportSpecifier, + sourcePath: string, + modExported: Set +) => { + if (!modExported.has('default')) { + throw new UndefinedDefaultImportError(sourcePath, spec) + } +} + +const validateImport = ( + spec: es.ImportSpecifier | es.ExportSpecifier, + sourcePath: string, + modExported: Set +) => { + const symbol = spec.type === 'ImportSpecifier' ? spec.imported.name : spec.local.name + if (symbol === 'default') { + validateDefaultImport(spec, sourcePath, modExported) + } else if (!modExported.has(symbol)) { + throw new UndefinedImportError(symbol, sourcePath, spec) + } +} + +const validateNamespaceImport = ( + spec: es.ImportNamespaceSpecifier | es.ExportAllDeclaration, + sourcePath: string, + modExported: Set +) => { + if (modExported.size === 0) { + throw new UndefinedNamespaceImportError(sourcePath, spec) + } +} + +/** + * Check for undefined imports, and also for symbols that have multiple export + * definitions + */ +export default function checkForUndefinedImportsAndReexports( + moduleDocs: Record>, + programs: Record, + topoOrder: string[], + allowUndefinedImports: boolean +) { + for (const name of topoOrder) { + const program = programs[name] + const exportedSymbols = new ArrayMap< + string, + es.ExportSpecifier | Exclude + >() + + simple(program, { + ImportDeclaration: (node: es.ImportDeclaration) => { + if (allowUndefinedImports) return + const source = node.source!.value as string + const exports = moduleDocs[source] + + node.specifiers.forEach(spec => + simple(spec, { + ImportSpecifier: (spec: es.ImportSpecifier) => validateImport(spec, source, exports), + ImportDefaultSpecifier: (spec: es.ImportDefaultSpecifier) => + validateDefaultImport(spec, source, exports), + ImportNamespaceSpecifier: (spec: es.ImportNamespaceSpecifier) => + validateNamespaceImport(spec, source, exports) + }) + ) + }, + ExportDefaultDeclaration: (node: es.ExportDefaultDeclaration) => { + exportedSymbols.add('default', node) + }, + ExportNamedDeclaration: (node: es.ExportNamedDeclaration) => { + if (node.declaration) { + if (node.declaration.type === 'VariableDeclaration') { + for (const declaration of node.declaration.declarations) { + extractIdsFromPattern(declaration.id).forEach(id => { + exportedSymbols.add(id.name, node) + }) + } + } else { + exportedSymbols.add(node.declaration.id!.name, node) + } + } else if (node.source) { + const source = node.source!.value as string + const exports = moduleDocs[source] + node.specifiers.forEach(spec => { + if (!allowUndefinedImports) { + validateImport(spec, source, exports) + } + + exportedSymbols.add(spec.exported.name, spec) + }) + } else { + node.specifiers.forEach(spec => exportedSymbols.add(spec.exported.name, spec)) + } + }, + ExportAllDeclaration: (node: es.ExportAllDeclaration) => { + const source = node.source!.value as string + const exports = moduleDocs[source] + if (!allowUndefinedImports) { + validateNamespaceImport(node, source, exports) + } + if (node.exported) { + exportedSymbols.add(node.exported.name, node) + } else { + for (const symbol of exports) { + exportedSymbols.add(symbol, node) + } + } + } + }) + + moduleDocs[name] = new Set( + exportedSymbols.entries().map(([symbol, nodes]) => { + if (nodes.length === 1) return symbol + throw new ReexportSymbolError(name, symbol, nodes) + }) + ) + } +} diff --git a/src/modules/preprocessor/constructors/baseConstructors.ts b/src/modules/preprocessor/constructors/baseConstructors.ts new file mode 100644 index 000000000..f67fb5c6c --- /dev/null +++ b/src/modules/preprocessor/constructors/baseConstructors.ts @@ -0,0 +1,132 @@ +import es from 'estree' + +// Note that typecasting is done on some of the constructed AST nodes because +// the ESTree AST node types are not fully aligned with the actual AST that +// is generated by the Acorn parser. However, the extra/missing properties +// are unused in the Source interpreter/transpiler. As such, we can safely +// ignore their existence to make the typing cleaner. The alternative would +// be to define our own AST node types based off the ESTree AST node types +// and use our custom AST node types everywhere. + +export const createLiteral = ( + value: string | number | boolean | null, + raw?: string +): es.Literal => { + return { + type: 'Literal', + value, + raw: raw ?? typeof value === 'string' ? `"${value}"` : String(value) + } +} + +export const createIdentifier = (name: string): es.Identifier => { + return { + type: 'Identifier', + name + } +} + +export const createCallExpression = ( + functionName: string, + functionArguments: Array +): es.SimpleCallExpression => { + return { + type: 'CallExpression', + callee: createIdentifier(functionName), + arguments: functionArguments + // The 'optional' property is typed in ESTree, but does not exist + // on SimpleCallExpression nodes in the AST generated by acorn parser. + } as es.SimpleCallExpression +} + +export const createVariableDeclarator = ( + id: es.Identifier, + initialValue: es.Expression | null | undefined = null +): es.VariableDeclarator => { + return { + type: 'VariableDeclarator', + id, + init: initialValue + } +} + +export const createVariableDeclaration = ( + declarations: es.VariableDeclarator[], + kind: 'var' | 'let' | 'const' +): es.VariableDeclaration => { + return { + type: 'VariableDeclaration', + declarations, + kind + } +} + +export const createReturnStatement = ( + argument: es.Expression | null | undefined +): es.ReturnStatement => { + return { + type: 'ReturnStatement', + argument + } +} + +export const createFunctionDeclaration = ( + name: string, + params: es.Pattern[], + body: es.Statement[] +): es.FunctionDeclaration => { + return { + type: 'FunctionDeclaration', + expression: false, + generator: false, + id: { + type: 'Identifier', + name + }, + params, + body: { + type: 'BlockStatement', + body + } + // The 'expression' property is not typed in ESTree, but it exists + // on FunctionDeclaration nodes in the AST generated by acorn parser. + } as es.FunctionDeclaration +} + +export const createImportDeclaration = ( + specifiers: Array, + source: es.Literal +): es.ImportDeclaration => { + return { + type: 'ImportDeclaration', + specifiers, + source + } +} + +export const createImportSpecifier = ( + local: es.Identifier, + imported: es.Identifier +): es.ImportSpecifier => { + return { + type: 'ImportSpecifier', + local, + imported + } +} + +export const createImportDefaultSpecifier = (local: es.Identifier): es.ImportDefaultSpecifier => { + return { + type: 'ImportDefaultSpecifier', + local + } +} + +export const createImportNamespaceSpecifier = ( + local: es.Identifier +): es.ImportNamespaceSpecifier => { + return { + type: 'ImportNamespaceSpecifier', + local + } +} diff --git a/src/modules/preprocessor/constructors/contextSpecificConstructors.ts b/src/modules/preprocessor/constructors/contextSpecificConstructors.ts new file mode 100644 index 000000000..aa16ec4b5 --- /dev/null +++ b/src/modules/preprocessor/constructors/contextSpecificConstructors.ts @@ -0,0 +1,108 @@ +import es from 'estree' + +import { accessExportFunctionName } from '../../../stdlib/localImport.prelude' +import { + createCallExpression, + createIdentifier, + createLiteral, + createVariableDeclaration, + createVariableDeclarator +} from './baseConstructors' + +/** + * Constructs a call to the `pair` function. + * + * @param head The head of the pair. + * @param tail The tail of the pair. + */ +export const createPairCallExpression = ( + head: es.Expression | es.SpreadElement, + tail: es.Expression | es.SpreadElement +): es.SimpleCallExpression => { + return createCallExpression('pair', [head, tail]) +} + +/** + * Constructs a call to the `list` function. + * + * @param listElements The elements of the list. + */ +export const createListCallExpression = ( + listElements: Array +): es.SimpleCallExpression => { + return createCallExpression('list', listElements) +} + +/** + * Constructs the AST equivalent of: + * const importedName = __access_export__(functionName, lookupName); + * + * @param functionName The name of the transformed function declaration to import from. + * @param importedName The name of the import. + * @param lookupName The name to lookup in the transformed function declaration. + */ +export const createImportedNameDeclaration = ( + functionName: string, + importedName: es.Identifier, + lookupName: string +): es.VariableDeclaration => { + const callExpression = createCallExpression(accessExportFunctionName, [ + createIdentifier(functionName), + createLiteral(lookupName) + ]) + const variableDeclarator = createVariableDeclarator(importedName, callExpression) + return createVariableDeclaration([variableDeclarator], 'const') +} + +/** + * Constructs the AST equivalent of: + * const variableName = functionName(...functionArgs); + * + * @param functionName The name of the transformed function declaration to invoke. + * @param variableName The name of the variable holding the result of the function invocation. + * @param functionArgs The arguments to be passed when invoking the function. + */ +export const createInvokedFunctionResultVariableDeclaration = ( + functionName: string, + variableName: string, + functionArgs: es.Identifier[] +): es.VariableDeclaration => { + const callExpression = createCallExpression(functionName, functionArgs) + const variableDeclarator = createVariableDeclarator( + createIdentifier(variableName), + callExpression + ) + return createVariableDeclaration([variableDeclarator], 'const') +} + +/** + * Clones the import specifier, but only the properties + * that are part of its ESTree AST type. This is useful for + * stripping out extraneous information on the import + * specifier AST nodes (such as the location information + * that the Acorn parser adds). + * + * @param importSpecifier The import specifier to be cloned. + */ +export const cloneAndStripImportSpecifier = ( + importSpecifier: es.ImportSpecifier | es.ImportDefaultSpecifier | es.ImportNamespaceSpecifier +): es.ImportSpecifier | es.ImportDefaultSpecifier | es.ImportNamespaceSpecifier => { + switch (importSpecifier.type) { + case 'ImportSpecifier': + return { + type: 'ImportSpecifier', + local: createIdentifier(importSpecifier.local.name), + imported: createIdentifier(importSpecifier.imported.name) + } + case 'ImportDefaultSpecifier': + return { + type: 'ImportDefaultSpecifier', + local: createIdentifier(importSpecifier.local.name) + } + case 'ImportNamespaceSpecifier': + return { + type: 'ImportNamespaceSpecifier', + local: createIdentifier(importSpecifier.local.name) + } + } +} diff --git a/src/modules/preprocessor/directedGraph.ts b/src/modules/preprocessor/directedGraph.ts new file mode 100644 index 000000000..c7ff436ae --- /dev/null +++ b/src/modules/preprocessor/directedGraph.ts @@ -0,0 +1,230 @@ +/** + * The result of attempting to find a topological ordering + * of nodes on a DirectedGraph. + */ +export type TopologicalOrderResult = + | { + isValidTopologicalOrderFound: true + topologicalOrder: string[] + firstCycleFound: null + } + | { + isValidTopologicalOrderFound: false + topologicalOrder: null + firstCycleFound: string[] + } + +/** + * Represents a directed graph which disallows self-loops. + */ +export class DirectedGraph { + private readonly adjacencyList: Map> + private readonly differentKeysError = new Error( + 'The keys of the adjacency list & the in-degree maps are not the same. This should never occur.' + ) + + constructor() { + this.adjacencyList = new Map() + } + + /** + * Adds a directed edge to the graph from the source node to + * the destination node. Self-loops are not allowed. + * + * @param sourceNode The name of the source node. + * @param destinationNode The name of the destination node. + */ + public addEdge(sourceNode: string, destinationNode: string): void { + if (sourceNode === destinationNode) { + throw new Error('Edges that connect a node to itself are not allowed.') + } + + const neighbours = this.adjacencyList.get(sourceNode) ?? new Set() + neighbours.add(destinationNode) + this.adjacencyList.set(sourceNode, neighbours) + + // Create an entry for the destination node if it does not exist + // in the adjacency list. This is so that the set of keys of the + // adjacency list is the same as the set of nodes in the graph. + if (!this.adjacencyList.has(destinationNode)) { + this.adjacencyList.set(destinationNode, new Set()) + } + } + + /** + * Returns whether the directed edge from the source node to the + * destination node exists in the graph. + * + * @param sourceNode The name of the source node. + * @param destinationNode The name of the destination node. + */ + public hasEdge(sourceNode: string, destinationNode: string): boolean { + if (sourceNode === destinationNode) { + throw new Error('Edges that connect a node to itself are not allowed.') + } + + const neighbours = this.adjacencyList.get(sourceNode) ?? new Set() + return neighbours.has(destinationNode) + } + + /** + * Calculates the in-degree of every node in the directed graph. + * + * The in-degree of a node is the number of edges coming into + * the node. + */ + private calculateInDegrees(): Map { + const inDegrees = new Map() + for (const neighbours of this.adjacencyList.values()) { + for (const neighbour of neighbours) { + const inDegree = inDegrees.get(neighbour) ?? 0 + inDegrees.set(neighbour, inDegree + 1) + } + } + // Handle nodes which have an in-degree of 0. + for (const node of this.adjacencyList.keys()) { + if (!inDegrees.has(node)) { + inDegrees.set(node, 0) + } + } + return inDegrees + } + + /** + * Finds a cycle of nodes in the directed graph. This operates on the + * invariant that any nodes left over with a non-zero in-degree after + * Kahn's algorithm has been run is part of a cycle. + * + * @param inDegrees The number of edges coming into each node after + * running Kahn's algorithm. + */ + private findCycle(inDegrees: Map): string[] { + // First, we pick any arbitrary node that is part of a cycle as our + // starting node. + let startingNodeInCycle: string | null = null + for (const [node, inDegree] of inDegrees) { + if (inDegree !== 0) { + startingNodeInCycle = node + break + } + } + // By the invariant stated above, it is impossible that the starting + // node cannot be found. The lack of a starting node implies that + // all nodes have an in-degree of 0 after running Kahn's algorithm. + // This in turn implies that Kahn's algorithm was able to find a + // valid topological ordering & that the graph contains no cycles. + if (startingNodeInCycle === null) { + throw new Error('There are no cycles in this graph. This should never happen.') + } + + const cycle = [startingNodeInCycle] + // Then, we keep picking arbitrary nodes with non-zero in-degrees until + // we pick a node that has already been picked. + while (true) { + const currentNode = cycle[cycle.length - 1] + + const neighbours = this.adjacencyList.get(currentNode) + if (neighbours === undefined) { + throw this.differentKeysError + } + // By the invariant stated above, it is impossible that any node + // on the cycle has an in-degree of 0 after running Kahn's algorithm. + // An in-degree of 0 implies that the node is not part of a cycle, + // which is a contradiction since the current node was picked because + // it is part of a cycle. + if (neighbours.size === 0) { + throw new Error(`Node '${currentNode}' has no incoming edges. This should never happen.`) + } + + let nextNodeInCycle: string | null = null + for (const neighbour of neighbours) { + if (inDegrees.get(neighbour) !== 0) { + nextNodeInCycle = neighbour + break + } + } + // By the invariant stated above, if the current node is part of a cycle, + // then one of its neighbours must also be part of the same cycle. This + // is because a cycle contains at least 2 nodes. + if (nextNodeInCycle === null) { + throw new Error( + `None of the neighbours of node '${currentNode}' are part of the same cycle. This should never happen.` + ) + } + + // If the next node we pick is already part of the cycle, + // we drop all elements before the first instance of the + // next node and return the cycle. + const nextNodeIndex = cycle.indexOf(nextNodeInCycle) + const isNodeAlreadyInCycle = nextNodeIndex !== -1 + cycle.push(nextNodeInCycle) + if (isNodeAlreadyInCycle) { + return cycle.slice(nextNodeIndex) + } + } + } + + /** + * Returns a topological ordering of the nodes in the directed + * graph if the graph is acyclic. Otherwise, returns null. + * + * To get the topological ordering, Kahn's algorithm is used. + */ + public getTopologicalOrder(): TopologicalOrderResult { + let numOfVisitedNodes = 0 + const inDegrees = this.calculateInDegrees() + const topologicalOrder: string[] = [] + + const queue: string[] = [] + for (const [node, inDegree] of inDegrees) { + if (inDegree === 0) { + queue.push(node) + } + } + + while (true) { + const node = queue.shift() + // 'node' is 'undefined' when the queue is empty. + if (node === undefined) { + break + } + + numOfVisitedNodes++ + topologicalOrder.push(node) + + const neighbours = this.adjacencyList.get(node) + if (neighbours === undefined) { + throw this.differentKeysError + } + for (const neighbour of neighbours) { + const inDegree = inDegrees.get(neighbour) + if (inDegree === undefined) { + throw this.differentKeysError + } + inDegrees.set(neighbour, inDegree - 1) + + if (inDegrees.get(neighbour) === 0) { + queue.push(neighbour) + } + } + } + + // If not all nodes are visited, then at least one + // cycle exists in the graph and a topological ordering + // cannot be found. + if (numOfVisitedNodes !== this.adjacencyList.size) { + const firstCycleFound = this.findCycle(inDegrees) + return { + isValidTopologicalOrderFound: false, + topologicalOrder: null, + firstCycleFound + } + } + + return { + isValidTopologicalOrderFound: true, + topologicalOrder, + firstCycleFound: null + } + } +} diff --git a/src/modules/preprocessor/filePaths.ts b/src/modules/preprocessor/filePaths.ts new file mode 100644 index 000000000..3476cd4fe --- /dev/null +++ b/src/modules/preprocessor/filePaths.ts @@ -0,0 +1,107 @@ +import { + ConsecutiveSlashesInFilePathError, + IllegalCharInFilePathError, + InvalidFilePathError +} from '../../errors/localImportErrors' + +/** + * Maps non-alphanumeric characters that are legal in file paths + * to strings which are legal in function names. + */ +export const nonAlphanumericCharEncoding: Record = { + // While the underscore character is legal in both file paths + // and function names, it is the only character to be legal + // in both that is not an alphanumeric character. For simplicity, + // we handle it the same way as the other non-alphanumeric + // characters. + _: '_', + '/': '$', + // The following encodings work because we disallow file paths + // with consecutive slash characters (//). Note that when using + // the 'replace' or 'replaceAll' functions, the dollar sign ($) + // takes on a special meaning. As such, to insert a dollar sign, + // we need to write '$$'. See + // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace#specifying_a_string_as_the_replacement + // for more information. + '.': '$$$$dot$$$$', // '$$dot$$' + '-': '$$$$dash$$$$' // '$$dash$$' +} + +/** + * Transforms the given file path to a valid function name. The + * characters in a valid function name must be either an + * alphanumeric character, the underscore (_), or the dollar ($). + * + * In addition, the returned function name has underscores appended + * on both ends to make it even less likely that the function name + * will collide with a user-inputted name. + * + * @param filePath The file path to transform. + */ +export const transformFilePathToValidFunctionName = (filePath: string): string => { + const encodeChars = Object.entries(nonAlphanumericCharEncoding).reduce( + ( + accumulatedFunction: (filePath: string) => string, + [charToReplace, replacementString]: [string, string] + ) => { + return (filePath: string): string => + accumulatedFunction(filePath).replaceAll(charToReplace, replacementString) + }, + (filePath: string): string => filePath + ) + return `__${encodeChars(filePath)}__` +} + +/** + * Transforms the given function name to the expected name that + * the variable holding the result of invoking the function should + * have. The main consideration of this transformation is that + * the resulting name should not conflict with any of the names + * that can be generated by `transformFilePathToValidFunctionName`. + * + * @param functionName The function name to transform. + */ +export const transformFunctionNameToInvokedFunctionResultVariableName = ( + functionName: string +): string => { + return `_${functionName}_` +} + +const isAlphanumeric = (char: string): boolean => { + return /[a-zA-Z0-9]/i.exec(char) !== null +} + +/** + * Validates the given file path, returning an `InvalidFilePathError` + * if the file path is invalid & `null` otherwise. A file path is + * valid if it only contains alphanumeric characters and the characters + * defined in `charEncoding`, and does not contain consecutive slash + * characters (//). + * + * @param filePath The file path to check. + */ +export const validateFilePath = (filePath: string): InvalidFilePathError | null => { + if (filePath.includes('//')) { + return new ConsecutiveSlashesInFilePathError(filePath) + } + for (const char of filePath) { + if (isAlphanumeric(char)) { + continue + } + if (char in nonAlphanumericCharEncoding) { + continue + } + return new IllegalCharInFilePathError(filePath) + } + return null +} + +/** + * Returns whether a string is a file path. We define a file + * path to be any string containing the '/' character. + * + * @param value The value of the string. + */ +export const isFilePath = (value: string): boolean => { + return value.includes('/') +} diff --git a/src/modules/preprocessor/index.ts b/src/modules/preprocessor/index.ts new file mode 100644 index 000000000..aa64a2d20 --- /dev/null +++ b/src/modules/preprocessor/index.ts @@ -0,0 +1,375 @@ +import type es from 'estree' +import * as pathlib from 'path' + +import { CircularImportError, ModuleNotFoundError } from '../errors' +import { memoizedGetModuleDocsAsync, memoizedGetModuleManifestAsync } from '../moduleLoaderAsync' +import { ModuleManifest } from '../moduleTypes' +import { parse } from '../../parser/parser' +import { AcornOptions } from '../../parser/types' +import { Context } from '../../types' +import assert from '../../utils/assert' +import { isModuleDeclaration, isSourceImport } from '../../utils/ast/typeGuards' +import { isIdentifier } from '../../utils/rttc' +import { createInvokedFunctionResultVariableDeclaration } from './constructors/contextSpecificConstructors' +import { DirectedGraph } from './directedGraph' +import { + transformFilePathToValidFunctionName, + transformFunctionNameToInvokedFunctionResultVariableName +} from './filePaths' +import hoistAndMergeImports from './transformers/hoistAndMergeImports' +import removeImportsAndExports from './transformers/removeImportsAndExports' +import { + createAccessImportStatements, + getInvokedFunctionResultVariableNameToImportSpecifiersMap, + transformProgramToFunctionDeclaration +} from './transformers/transformProgramToFunctionDeclaration' +import checkForUndefinedImportsAndReexports from './analyzer' + +/** + * Error type to indicate that preprocessing has failed but that the context + * contains the underlying errors + */ +class PreprocessError extends Error {} + +type ModuleResolutionOptions = { + directory?: boolean + extensions: string[] | null + allowBuiltins?: boolean +} + +const defaultResolutionOptions: Required = { + directory: false, + extensions: null, + allowBuiltins: false +} + +export const parseProgramsAndConstructImportGraph = async ( + files: Partial>, + entrypointFilePath: string, + context: Context, + rawResolutionOptions: Partial = {} +): Promise<{ + programs: Record + importGraph: DirectedGraph + moduleDocs: Record> +}> => { + const resolutionOptions = { + ...defaultResolutionOptions, + ...rawResolutionOptions + } + const programs: Record = {} + const importGraph = new DirectedGraph() + + // If there is more than one file, tag AST nodes with the source file path. + const numOfFiles = Object.keys(files).length + const shouldAddSourceFileToAST = numOfFiles > 1 + + const moduleDocs: Record> = {} + + // If a Source import is never used, then there will be no need to + // load the module manifest + let moduleManifest: ModuleManifest | null = null + + function getModuleCode(p: string) { + // In the future we can abstract this function out and hopefully interface directly + // with actual file systems + return files[p] + } + + // From the given import source, return the absolute path for that import + // If the import could not be located, then throw an error + async function resolveModule( + desiredPath: string, + node: Exclude + ): Promise { + const source = node.source?.value + assert( + typeof source === 'string', + `${node.type} should have a source of type string, got ${source}` + ) + + let modAbsPath: string + if (isSourceImport(source)) { + if (!moduleManifest) { + moduleManifest = await memoizedGetModuleManifestAsync() + } + + if (source in moduleManifest) return source + modAbsPath = source + } else { + modAbsPath = pathlib.resolve(desiredPath, '..', source) + if (getModuleCode(modAbsPath) !== undefined) return modAbsPath + + if (resolutionOptions.directory && getModuleCode(`${modAbsPath}/index`) !== undefined) { + return `${modAbsPath}/index` + } + + if (resolutionOptions.extensions) { + for (const ext of resolutionOptions.extensions) { + if (getModuleCode(`${modAbsPath}.${ext}`) !== undefined) return `${modAbsPath}.${ext}` + + if (resolutionOptions.directory && getModuleCode(`${modAbsPath}/index.${ext}`) !== undefined) { + return `${modAbsPath}/index.${ext}` + } + } + } + } + + throw new ModuleNotFoundError(modAbsPath, node) + } + + async function parseFile(currentFilePath: string): Promise { + if (isSourceImport(currentFilePath)) { + if (currentFilePath in moduleDocs) return + + // Will not throw ModuleNotFoundError + // If this were invalid, resolveModule would have thrown already + const docs = await memoizedGetModuleDocsAsync(currentFilePath) + if (!docs) { + throw new Error(`Failed to load documentation for ${currentFilePath}`) + } + moduleDocs[currentFilePath] = new Set(Object.keys(docs)) + return + } + + if (currentFilePath in programs) return + + const code = getModuleCode(currentFilePath) + assert( + code !== undefined, + "Module resolver should've thrown an error if the file path did not resolve" + ) + + // Tag AST nodes with the source file path for use in error messages. + const parserOptions: Partial = shouldAddSourceFileToAST + ? { + sourceFile: currentFilePath + } + : {} + const program = parse(code, context, parserOptions, false) + if (!program) { + // Due to a bug in the typed parser where throwOnError isn't respected, + // we need to throw a quick exit error here instead + throw new PreprocessError() + } + + // assert(program !== null, 'Parser should throw on error and not just return null') + programs[currentFilePath] = program + + const dependencies = new Set() + for (const node of program.body) { + switch (node.type) { + case 'ExportNamedDeclaration': { + if (!node.source) continue + } + case 'ExportAllDeclaration': + case 'ImportDeclaration': { + const modAbsPath = await resolveModule(currentFilePath, node) + if (modAbsPath === currentFilePath) { + throw new CircularImportError([modAbsPath, currentFilePath]) + } + + dependencies.add(modAbsPath) + + // Replace the source of the node with the resolved path + node.source!.value = modAbsPath + break + } + } + } + + await Promise.all( + Array.from(dependencies.keys()).map(async dependency => { + await parseFile(dependency) + + // There is no need to track Source modules as dependencies, as it can be assumed + // that they will always have to be loaded first + if (!isSourceImport(dependency)) { + // If the edge has already been traversed before, the import graph + // must contain a cycle. Then we can exit early and proceed to find the cycle + if (importGraph.hasEdge(dependency, currentFilePath)) { + throw new PreprocessError() + } + + importGraph.addEdge(dependency, currentFilePath) + } + }) + ) + } + + try { + await parseFile(entrypointFilePath) + } catch (error) { + if (!(error instanceof PreprocessError)) { + context.errors.push(error) + } + } + + return { + programs, + importGraph, + moduleDocs + } +} + +export type PreprocessOptions = { + allowUndefinedImports?: boolean +} + +const defaultOptions: Required = { + allowUndefinedImports: false +} + +/** + * Preprocesses file imports and returns a transformed Abstract Syntax Tree (AST). + * If an error is encountered at any point, returns `undefined` to signify that an + * error occurred. Details of the error can be found inside `context.errors`. + * + * The preprocessing works by transforming each imported file into a function whose + * parameters are other files (results of transformed functions) and return value + * is a pair where the head is the default export or null, and the tail is a list + * of pairs that map from exported names to identifiers. + * + * See https://github.com/source-academy/js-slang/wiki/Local-Module-Import-&-Export + * for more information. + * + * @param files An object mapping absolute file paths to file content. + * @param entrypointFilePath The absolute path of the entrypoint file. + * @param context The information associated with the program evaluation. + */ +const preprocessFileImports = async ( + files: Partial>, + entrypointFilePath: string, + context: Context, + rawOptions: Partial = {} +): Promise => { + const { allowUndefinedImports } = { + ...defaultOptions, + ...rawOptions + } + + // Parse all files into ASTs and build the import graph. + const { programs, importGraph, moduleDocs } = await parseProgramsAndConstructImportGraph( + files, + entrypointFilePath, + context + ) + + // Return 'undefined' if there are errors while parsing. + if (context.errors.length !== 0) { + return undefined + } + + // Check for circular imports. + const topologicalOrderResult = importGraph.getTopologicalOrder() + if (!topologicalOrderResult.isValidTopologicalOrderFound) { + context.errors.push(new CircularImportError(topologicalOrderResult.firstCycleFound)) + return undefined + } + + try { + // Based on how the import graph is constructed, it could be the case that the entrypoint + // file is never included in the topo order. This is only an issue for the import export + // validator, hence the following code + const fullTopoOrder = topologicalOrderResult.topologicalOrder + if (!fullTopoOrder.includes(entrypointFilePath)) { + fullTopoOrder.push(entrypointFilePath) + } + + // This check is performed after cycle detection because if we tried to resolve export symbols + // and there is a cycle in the import graph the constructImportGraph function may end up in an + // infinite loop + checkForUndefinedImportsAndReexports(moduleDocs, programs, fullTopoOrder, allowUndefinedImports) + } catch (error) { + context.errors.push(error) + return undefined + } + + // We want to operate on the entrypoint program to get the eventual + // preprocessed program. + const entrypointProgram = programs[entrypointFilePath] + const entrypointDirPath = pathlib.resolve(entrypointFilePath, '..') + + // Create variables to hold the imported statements. + const entrypointProgramModuleDeclarations = entrypointProgram.body.filter(isModuleDeclaration) + const entrypointProgramInvokedFunctionResultVariableNameToImportSpecifiersMap = + getInvokedFunctionResultVariableNameToImportSpecifiersMap( + entrypointProgramModuleDeclarations, + entrypointDirPath + ) + const entrypointProgramAccessImportStatements = createAccessImportStatements( + entrypointProgramInvokedFunctionResultVariableNameToImportSpecifiersMap + ) + + // Transform all programs into their equivalent function declaration + // except for the entrypoint program. + const functionDeclarations: Record = {} + for (const [filePath, program] of Object.entries(programs)) { + // The entrypoint program does not need to be transformed into its + // function declaration equivalent as its enclosing environment is + // simply the overall program's (constructed program's) environment. + if (filePath === entrypointFilePath) { + continue + } + + const functionDeclaration = transformProgramToFunctionDeclaration(program, filePath) + const functionName = functionDeclaration.id?.name + assert( + functionName !== undefined, + 'A transformed function declaration is missing its name. This should never happen.' + ) + + functionDeclarations[functionName] = functionDeclaration + } + + // Invoke each of the transformed functions and store the result in a variable. + const invokedFunctionResultVariableDeclarations: es.VariableDeclaration[] = [] + topologicalOrderResult.topologicalOrder.forEach((filePath: string): void => { + // As mentioned above, the entrypoint program does not have a function + // declaration equivalent, so there is no need to process it. + if (filePath === entrypointFilePath) { + return + } + + const functionName = transformFilePathToValidFunctionName(filePath) + const invokedFunctionResultVariableName = + transformFunctionNameToInvokedFunctionResultVariableName(functionName) + + const functionDeclaration = functionDeclarations[functionName] + const functionParams = functionDeclaration.params.filter(isIdentifier) + assert( + functionParams.length === functionDeclaration.params.length, + 'Function declaration contains non-Identifier AST nodes as params. This should never happen.' + ) + + const invokedFunctionResultVariableDeclaration = createInvokedFunctionResultVariableDeclaration( + functionName, + invokedFunctionResultVariableName, + functionParams + ) + invokedFunctionResultVariableDeclarations.push(invokedFunctionResultVariableDeclaration) + }) + + // Re-assemble the program. + const preprocessedProgram: es.Program = { + ...entrypointProgram, + body: [ + ...Object.values(functionDeclarations), + ...invokedFunctionResultVariableDeclarations, + ...entrypointProgramAccessImportStatements, + ...entrypointProgram.body + ] + } + // Import and Export related nodes are no longer necessary, so we can remove them from the program entirely + removeImportsAndExports(preprocessedProgram) + + // Finally, we need to hoist all remaining imports to the top of the + // program. These imports should be source module imports since + // non-Source module imports would have already been removed. As part + // of this step, we also merge imports from the same module so as to + // import each unique name per module only once. + hoistAndMergeImports(preprocessedProgram, Object.values(programs)) + return preprocessedProgram +} + +export default preprocessFileImports diff --git a/src/modules/preprocessor/transformers/hoistAndMergeImports.ts b/src/modules/preprocessor/transformers/hoistAndMergeImports.ts new file mode 100644 index 000000000..d3d79602f --- /dev/null +++ b/src/modules/preprocessor/transformers/hoistAndMergeImports.ts @@ -0,0 +1,85 @@ +import es from 'estree' + +import { isImportDeclaration, isSourceImport } from '../../../utils/ast/typeGuards' +import { + createIdentifier, + createImportDeclaration, + createImportDefaultSpecifier, + createImportSpecifier, + createLiteral +} from '../constructors/baseConstructors' + +/** + * Hoists import declarations to the top of the program & merges duplicate + * imports for the same module. + * + * Note that two modules are the same if and only if their import source + * is the same. This function does not resolve paths against a base + * directory. If such a functionality is required, this function will + * need to be modified. + * + * @param program The AST which should have its ImportDeclaration nodes + * hoisted & duplicate imports merged. + */ +export default function hoistAndMergeImports(program: es.Program, programs: es.Program[]) { + const importNodes = programs.flatMap(({ body }) => body) + .filter(isImportDeclaration) + const importsToSpecifiers = new Map>>() + + for (const node of importNodes) { + if (!node.source) continue + + const source = node.source!.value as string + // We no longer need imports from non-source modules, so we can just ignore them + if (!isSourceImport(source)) continue + + if (!importsToSpecifiers.has(source)) { + importsToSpecifiers.set(source, new Map()) + } + const specifierMap = importsToSpecifiers.get(source)! + node.specifiers.forEach(spec => { + let importingName: string + switch (spec.type) { + case 'ImportSpecifier': { + importingName = spec.imported.name + break + } + case 'ImportDefaultSpecifier': { + importingName = 'default' + break + } + case 'ImportNamespaceSpecifier': { + // TODO handle + throw new Error('ImportNamespaceSpecifiers are not supported!') + } + } + + if (!specifierMap.has(importingName)) { + specifierMap.set(importingName, new Set()) + } + specifierMap.get(importingName)!.add(spec.local.name) + }) + } + + // Every distinct source module being imported is given its own ImportDeclaration node + const importDeclarations = Array.from(importsToSpecifiers.entries()).map( + ([moduleName, imports]) => { + // Across different modules, the user may choose to alias some of the declarations, so we keep track, + // of all the different aliases used for each unique imported symbol + const specifiers = Array.from(imports.entries()).flatMap(([importedName, aliases]) => { + if (importedName === 'default') { + return Array.from(aliases).map(alias => + createImportDefaultSpecifier(createIdentifier(alias)) + ) as (es.ImportSpecifier | es.ImportDefaultSpecifier)[] + } else { + return Array.from(aliases).map(alias => + createImportSpecifier(createIdentifier(alias), createIdentifier(importedName)) + ) + } + }) + + return createImportDeclaration(specifiers, createLiteral(moduleName)) + } + ) + program.body = [...importDeclarations, ...program.body] +} diff --git a/src/modules/preprocessor/transformers/removeImportsAndExports.ts b/src/modules/preprocessor/transformers/removeImportsAndExports.ts new file mode 100644 index 000000000..7bb46c4a9 --- /dev/null +++ b/src/modules/preprocessor/transformers/removeImportsAndExports.ts @@ -0,0 +1,32 @@ +import { Program, Statement } from 'estree' + +import assert from '../../../utils/assert' +import { isDeclaration } from '../../../utils/ast/typeGuards' + +export default function removeImportsAndExports(program: Program) { + const newBody = program.body.reduce((res, node) => { + switch (node.type) { + case 'ExportDefaultDeclaration': { + if (isDeclaration(node.declaration)) { + assert( + node.declaration.type !== 'VariableDeclaration', + 'ExportDefaultDeclarations should not have variable declarations' + ) + if (node.declaration.id) { + return [...res, node.declaration] + } + } + return res + } + case 'ExportNamedDeclaration': + return node.declaration ? [...res, node.declaration] : res + case 'ImportDeclaration': + case 'ExportAllDeclaration': + return res + default: + return [...res, node] + } + }, [] as Statement[]) + + program.body = newBody +} diff --git a/src/modules/preprocessor/transformers/transformProgramToFunctionDeclaration.ts b/src/modules/preprocessor/transformers/transformProgramToFunctionDeclaration.ts new file mode 100644 index 000000000..8155e5f1e --- /dev/null +++ b/src/modules/preprocessor/transformers/transformProgramToFunctionDeclaration.ts @@ -0,0 +1,331 @@ +import es from 'estree' +import * as path from 'path' + +import { defaultExportLookupName } from '../../../stdlib/localImport.prelude' +import { + isDeclaration, + isDirective, + isModuleDeclaration, + isSourceImport, + isStatement +} from '../../../utils/ast/typeGuards' +import { + createFunctionDeclaration, + createIdentifier, + createLiteral, + createReturnStatement +} from '../constructors/baseConstructors' +import { + createImportedNameDeclaration, + createListCallExpression, + createPairCallExpression +} from '../constructors/contextSpecificConstructors' +import { + transformFilePathToValidFunctionName, + transformFunctionNameToInvokedFunctionResultVariableName +} from '../filePaths' + +type ImportSpecifier = es.ImportSpecifier | es.ImportDefaultSpecifier | es.ImportNamespaceSpecifier + +export const getInvokedFunctionResultVariableNameToImportSpecifiersMap = ( + nodes: es.ModuleDeclaration[], + currentDirPath: string +): Record => { + const invokedFunctionResultVariableNameToImportSpecifierMap: Record = + {} + nodes.forEach((node: es.ModuleDeclaration): void => { + // Only ImportDeclaration nodes specify imported names. + if (node.type !== 'ImportDeclaration') { + return + } + const importSource = node.source.value + if (typeof importSource !== 'string') { + throw new Error( + 'Encountered an ImportDeclaration node with a non-string source. This should never occur.' + ) + } + // Only handle import declarations for non-Source modules. + if (isSourceImport(importSource)) { + return + } + // Different import sources can refer to the same file. For example, + // both './b.js' & '../dir/b.js' can refer to the same file if the + // current file path is '/dir/a.js'. To ensure that every file is + // processed only once, we resolve the import source against the + // current file path to get the absolute file path of the file to + // be imported. Since the absolute file path is guaranteed to be + // unique, it is also the canonical file path. + const importFilePath = path.resolve(currentDirPath, importSource) + // Even though we limit the chars that can appear in Source file + // paths, some chars in file paths (such as '/') cannot be used + // in function names. As such, we substitute illegal chars with + // legal ones in a manner that gives us a bijective mapping from + // file paths to function names. + const importFunctionName = transformFilePathToValidFunctionName(importFilePath) + // In the top-level environment of the resulting program, for every + // imported file, we will end up with two different names; one for + // the function declaration, and another for the variable holding + // the result of invoking the function. The former is represented + // by 'importFunctionName', while the latter is represented by + // 'invokedFunctionResultVariableName'. Since multiple files can + // import the same file, yet we only want the code in each file to + // be evaluated a single time (and share the same state), we need to + // evaluate the transformed functions (of imported files) only once + // in the top-level environment of the resulting program, then pass + // the result (the exported names) into other transformed functions. + // Having the two different names helps us to achieve this objective. + const invokedFunctionResultVariableName = + transformFunctionNameToInvokedFunctionResultVariableName(importFunctionName) + // If this is the file ImportDeclaration node for the canonical + // file path, instantiate the entry in the map. + if ( + invokedFunctionResultVariableNameToImportSpecifierMap[invokedFunctionResultVariableName] === + undefined + ) { + invokedFunctionResultVariableNameToImportSpecifierMap[invokedFunctionResultVariableName] = [] + } + invokedFunctionResultVariableNameToImportSpecifierMap[invokedFunctionResultVariableName].push( + ...node.specifiers + ) + }) + return invokedFunctionResultVariableNameToImportSpecifierMap +} + +const getIdentifier = (node: es.Declaration): es.Identifier | null => { + switch (node.type) { + case 'FunctionDeclaration': + if (node.id === null) { + throw new Error( + 'Encountered a FunctionDeclaration node without an identifier. This should have been caught when parsing.' + ) + } + return node.id + case 'VariableDeclaration': + const id = node.declarations[0].id + // In Source, variable names are Identifiers. + if (id.type !== 'Identifier') { + throw new Error(`Expected variable name to be an Identifier, but was ${id.type} instead.`) + } + return id + case 'ClassDeclaration': + throw new Error('Exporting of class is not supported.') + } +} + +const getExportedNameToIdentifierMap = ( + nodes: es.ModuleDeclaration[] +): Record => { + const exportedNameToIdentifierMap: Record = {} + nodes.forEach((node: es.ModuleDeclaration): void => { + // Only ExportNamedDeclaration nodes specify exported names. + if (node.type !== 'ExportNamedDeclaration') { + return + } + if (node.declaration) { + const identifier = getIdentifier(node.declaration) + if (identifier === null) { + return + } + // When an ExportNamedDeclaration node has a declaration, the + // identifier is the same as the exported name (i.e., no renaming). + const exportedName = identifier.name + exportedNameToIdentifierMap[exportedName] = identifier + } else { + // When an ExportNamedDeclaration node does not have a declaration, + // it contains a list of names to export, i.e., export { a, b as c, d };. + // Exported names can be renamed using the 'as' keyword. As such, the + // exported names and their corresponding identifiers might be different. + node.specifiers.forEach((node: es.ExportSpecifier): void => { + const exportedName = node.exported.name + const identifier = node.local + exportedNameToIdentifierMap[exportedName] = identifier + }) + } + }) + return exportedNameToIdentifierMap +} + +const getDefaultExportExpression = ( + nodes: es.ModuleDeclaration[], + exportedNameToIdentifierMap: Partial> +): es.Expression | null => { + let defaultExport: es.Expression | null = null + + // Handle default exports which are parsed as ExportNamedDeclaration AST nodes. + // 'export { name as default };' is equivalent to 'export default name;' but + // is represented by an ExportNamedDeclaration node instead of an + // ExportedDefaultDeclaration node. + // + // NOTE: If there is a named export representing the default export, its entry + // in the map must be removed to prevent it from being treated as a named export. + if (exportedNameToIdentifierMap['default'] !== undefined) { + defaultExport = exportedNameToIdentifierMap['default'] + delete exportedNameToIdentifierMap['default'] + } + + nodes.forEach((node: es.ModuleDeclaration): void => { + // Only ExportDefaultDeclaration nodes specify the default export. + if (node.type !== 'ExportDefaultDeclaration') { + return + } + if (defaultExport !== null) { + // This should never occur because multiple default exports should have + // been caught by the Acorn parser when parsing into an AST. + throw new Error('Encountered multiple default exports!') + } + if (isDeclaration(node.declaration)) { + const identifier = getIdentifier(node.declaration) + if (identifier === null) { + return + } + // When an ExportDefaultDeclaration node has a declaration, the + // identifier is the same as the exported name (i.e., no renaming). + defaultExport = identifier + } else { + // When an ExportDefaultDeclaration node does not have a declaration, + // it has an expression. + defaultExport = node.declaration + } + }) + return defaultExport +} + +export const createAccessImportStatements = ( + invokedFunctionResultVariableNameToImportSpecifiersMap: Record +): es.VariableDeclaration[] => { + const importDeclarations: es.VariableDeclaration[] = [] + for (const [invokedFunctionResultVariableName, importSpecifiers] of Object.entries( + invokedFunctionResultVariableNameToImportSpecifiersMap + )) { + importSpecifiers.forEach((importSpecifier: ImportSpecifier): void => { + let importDeclaration + switch (importSpecifier.type) { + case 'ImportSpecifier': + importDeclaration = createImportedNameDeclaration( + invokedFunctionResultVariableName, + importSpecifier.local, + importSpecifier.imported.name + ) + break + case 'ImportDefaultSpecifier': + importDeclaration = createImportedNameDeclaration( + invokedFunctionResultVariableName, + importSpecifier.local, + defaultExportLookupName + ) + break + case 'ImportNamespaceSpecifier': + // In order to support namespace imports, Source would need to first support objects. + throw new Error('Namespace imports are not supported.') + } + importDeclarations.push(importDeclaration) + }) + } + return importDeclarations +} + +const createReturnListArguments = ( + exportedNameToIdentifierMap: Record +): Array => { + return Object.entries(exportedNameToIdentifierMap).map( + ([exportedName, identifier]: [string, es.Identifier]): es.SimpleCallExpression => { + const head = createLiteral(exportedName) + const tail = identifier + return createPairCallExpression(head, tail) + } + ) +} + +const removeDirectives = ( + nodes: Array +): Array => { + return nodes.filter( + ( + node: es.Directive | es.Statement | es.ModuleDeclaration + ): node is es.Statement | es.ModuleDeclaration => !isDirective(node) + ) +} + +const removeModuleDeclarations = ( + nodes: Array +): es.Statement[] => { + const statements: es.Statement[] = [] + nodes.forEach((node: es.Statement | es.ModuleDeclaration): void => { + if (isStatement(node)) { + statements.push(node) + return + } + // If there are declaration nodes that are child nodes of the + // ModuleDeclaration nodes, we add them to the processed statements + // array so that the declarations are still part of the resulting + // program. + switch (node.type) { + case 'ImportDeclaration': + break + case 'ExportNamedDeclaration': + if (node.declaration) { + statements.push(node.declaration) + } + break + case 'ExportDefaultDeclaration': + if (isDeclaration(node.declaration)) { + statements.push(node.declaration) + } + break + case 'ExportAllDeclaration': + throw new Error('Not implemented yet.') + } + }) + return statements +} + +/** + * Transforms the given program into a function declaration. This is done + * so that every imported module has its own scope (since functions have + * their own scope). + * + * @param program The program to be transformed. + * @param currentFilePath The file path of the current program. + */ +export const transformProgramToFunctionDeclaration = ( + program: es.Program, + currentFilePath: string +): es.FunctionDeclaration => { + const moduleDeclarations = program.body.filter(isModuleDeclaration) + const currentDirPath = path.resolve(currentFilePath, '..') + + // Create variables to hold the imported statements. + const invokedFunctionResultVariableNameToImportSpecifiersMap = + getInvokedFunctionResultVariableNameToImportSpecifiersMap(moduleDeclarations, currentDirPath) + const accessImportStatements = createAccessImportStatements( + invokedFunctionResultVariableNameToImportSpecifiersMap + ) + + // Create the return value of all exports for the function. + const exportedNameToIdentifierMap = getExportedNameToIdentifierMap(moduleDeclarations) + const defaultExportExpression = getDefaultExportExpression( + moduleDeclarations, + exportedNameToIdentifierMap + ) + const defaultExport = defaultExportExpression ?? createLiteral(null) + const namedExports = createListCallExpression( + createReturnListArguments(exportedNameToIdentifierMap) + ) + const returnStatement = createReturnStatement( + createPairCallExpression(defaultExport, namedExports) + ) + + // Assemble the function body. + const programStatements = removeModuleDeclarations(removeDirectives(program.body)) + const functionBody = [...accessImportStatements, ...programStatements, returnStatement] + + // Determine the function name based on the absolute file path. + const functionName = transformFilePathToValidFunctionName(currentFilePath) + + // Set the equivalent variable names of imported modules as the function parameters. + const functionParams = Object.keys(invokedFunctionResultVariableNameToImportSpecifiersMap).map( + createIdentifier + ) + + return createFunctionDeclaration(functionName, functionParams, functionBody) +} From fdbeaa6e888ed053eace1b863f063e506cc1af93 Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Wed, 10 May 2023 12:51:15 +0800 Subject: [PATCH 32/95] Fully relocate imports preprocessor --- .../__snapshots__/preprocessor.ts.snap | 44 -- src/localImports/__tests__/analyzer.ts | 338 -------------- src/localImports/__tests__/directedGraph.ts | 142 ------ src/localImports/__tests__/errorMessages.ts | 211 --------- src/localImports/__tests__/preprocessor.ts | 424 ----------------- .../hoistAndMergeImports.ts.snap | 21 - .../transformers/hoistAndMergeImports.ts | 83 ---- .../transformProgramToFunctionDeclaration.ts | 435 ------------------ src/localImports/__tests__/utils.ts | 63 --- src/localImports/analyzer.ts | 135 ------ .../constructors/baseConstructors.ts | 132 ------ .../contextSpecificConstructors.ts | 108 ----- src/localImports/directedGraph.ts | 230 --------- src/localImports/filePaths.ts | 107 ----- src/localImports/preprocessor.ts | 374 --------------- .../transformers/hoistAndMergeImports.ts | 87 ---- .../transformers/removeImportsAndExports.ts | 32 -- .../transformProgramToFunctionDeclaration.ts | 331 ------------- src/modules/__tests__/moduleLoaderAsync.ts | 175 +++++++ src/modules/errors.ts | 59 ++- src/modules/moduleLoader.ts | 2 +- src/modules/moduleLoaderAsync.ts | 87 ++-- src/modules/moduleTypes.ts | 14 +- .../transformers/removeImportsAndExports.ts | 21 +- 24 files changed, 301 insertions(+), 3354 deletions(-) delete mode 100644 src/localImports/__tests__/__snapshots__/preprocessor.ts.snap delete mode 100644 src/localImports/__tests__/analyzer.ts delete mode 100644 src/localImports/__tests__/directedGraph.ts delete mode 100644 src/localImports/__tests__/errorMessages.ts delete mode 100644 src/localImports/__tests__/preprocessor.ts delete mode 100644 src/localImports/__tests__/transformers/__snapshots__/hoistAndMergeImports.ts.snap delete mode 100644 src/localImports/__tests__/transformers/hoistAndMergeImports.ts delete mode 100644 src/localImports/__tests__/transformers/transformProgramToFunctionDeclaration.ts delete mode 100644 src/localImports/__tests__/utils.ts delete mode 100644 src/localImports/analyzer.ts delete mode 100644 src/localImports/constructors/baseConstructors.ts delete mode 100644 src/localImports/constructors/contextSpecificConstructors.ts delete mode 100644 src/localImports/directedGraph.ts delete mode 100644 src/localImports/filePaths.ts delete mode 100644 src/localImports/preprocessor.ts delete mode 100644 src/localImports/transformers/hoistAndMergeImports.ts delete mode 100644 src/localImports/transformers/removeImportsAndExports.ts delete mode 100644 src/localImports/transformers/transformProgramToFunctionDeclaration.ts create mode 100644 src/modules/__tests__/moduleLoaderAsync.ts diff --git a/src/localImports/__tests__/__snapshots__/preprocessor.ts.snap b/src/localImports/__tests__/__snapshots__/preprocessor.ts.snap deleted file mode 100644 index 215bf9acb..000000000 --- a/src/localImports/__tests__/__snapshots__/preprocessor.ts.snap +++ /dev/null @@ -1,44 +0,0 @@ -// Jest Snapshot v1, https://goo.gl/fbAQLP - -exports[`preprocessFileImports collates Source module imports at the start of the top-level environment of the preprocessed program 1`] = ` -"import {w, x, y, z} from \\"one_module\\"; -import {f, g} from \\"other_module\\"; -import {h} from \\"another_module\\"; -import {w, x, y, z} from \\"one_module\\"; -import {f, g} from \\"other_module\\"; -import {h} from \\"another_module\\"; -function __$b$$dot$$js__(___$c$$dot$$js___) { - const square = __access_export__(___$c$$dot$$js___, \\"square\\"); - const b = square(5); - return pair(null, list(pair(\\"b\\", b))); -} -function __$c$$dot$$js__() { - const square = x => x * x; - return pair(null, list(pair(\\"square\\", square))); -} -const ___$c$$dot$$js___ = __$c$$dot$$js__(); -const ___$b$$dot$$js___ = __$b$$dot$$js__(___$c$$dot$$js___); -const b = __access_export__(___$b$$dot$$js___, \\"b\\"); -b; -" -`; - -exports[`preprocessFileImports ignores Source module imports & removes all non-Source module import-related AST nodes in the preprocessed program 1`] = ` -"import d, {a, b, c} from \\"one_module\\"; -import d, {a, b, c} from \\"one_module\\"; -function __$not$$dash$$source$$dash$$module$$dot$$js__() { - const x = 1; - const y = 2; - const z = 3; - function square(x) { - return x * x; - } - return pair(square, list(pair(\\"x\\", x), pair(\\"y\\", y), pair(\\"z\\", z))); -} -const ___$not$$dash$$source$$dash$$module$$dot$$js___ = __$not$$dash$$source$$dash$$module$$dot$$js__(); -const w = __access_export__(___$not$$dash$$source$$dash$$module$$dot$$js___, \\"default\\"); -const x = __access_export__(___$not$$dash$$source$$dash$$module$$dot$$js___, \\"x\\"); -const y = __access_export__(___$not$$dash$$source$$dash$$module$$dot$$js___, \\"y\\"); -const z = __access_export__(___$not$$dash$$source$$dash$$module$$dot$$js___, \\"z\\"); -" -`; diff --git a/src/localImports/__tests__/analyzer.ts b/src/localImports/__tests__/analyzer.ts deleted file mode 100644 index 6e166638c..000000000 --- a/src/localImports/__tests__/analyzer.ts +++ /dev/null @@ -1,338 +0,0 @@ -import createContext from '../../createContext' -import { CircularImportError } from '../../errors/localImportErrors' -import { UndefinedImportErrorBase } from '../../modules/errors' -import { Chapter } from '../../types' -import { stripIndent } from '../../utils/formatters' -import { validateImportAndExports } from '../analyzer' -import { parseProgramsAndConstructImportGraph } from '../preprocessor' - -type ErrorInfo = { - symbol?: string - line: number - col: number - moduleName: string -} - -async function testCode( - files: Partial>, - entrypointFilePath: string, - allowUndefinedImports: boolean -) { - const context = createContext(Chapter.SOURCE_4) - const { programs, importGraph, moduleDocs } = await parseProgramsAndConstructImportGraph( - files, - entrypointFilePath, - context, - allowUndefinedImports - ) - - // Return 'undefined' if there are errors while parsing. - if (context.errors.length !== 0) { - throw context.errors[0] - } - - // Check for circular imports. - const topologicalOrderResult = importGraph.getTopologicalOrder() - if (!topologicalOrderResult.isValidTopologicalOrderFound) { - throw new CircularImportError(topologicalOrderResult.firstCycleFound) - } - - try { - validateImportAndExports( - moduleDocs, - programs, - topologicalOrderResult.topologicalOrder, - allowUndefinedImports - ) - } catch (error) { - console.log(error) - throw error - } - return true -} - -describe('Test throwing import validation errors', () => { - async function testFailure( - files: Partial>, - entrypointFilePath: string, - allowUndefinedImports: boolean, - errInfo: ErrorInfo - ) { - let err: any = null - try { - await testCode(files, entrypointFilePath, allowUndefinedImports) - } catch (error) { - err = error - } - - expect(err).toBeInstanceOf(UndefinedImportErrorBase) - expect(err.moduleName).toEqual(errInfo.moduleName) - if (errInfo.symbol) { - expect(err.symbol).toEqual(errInfo.symbol) - } - expect(err.location.start).toMatchObject({ - line: errInfo.line, - column: errInfo.col - }) - } - - function testSuccess( - files: Partial>, - entrypointFilePath: string, - allowUndefinedImports: boolean - ) { - return expect(testCode(files, entrypointFilePath, allowUndefinedImports)).resolves.toEqual(true) - } - - function testCases( - desc: string, - cases: [ - files: Partial>, - entrypointFilePath: string, - trueError: false | ErrorInfo, - falseError: false | ErrorInfo - ][] - ) { - describe(desc, () => { - test.each( - cases.flatMap(([files, entry, trueError, falseError], i) => { - return [ - [`Test Case ${i} with allowedUndefinedImports true`, files, entry, true, trueError], - [`Test Case ${i} with allowedUndefinedImports false`, files, entry, false, falseError] - ] - }) - )('%s', async (_, files, entrypointFilePath, allowUndefined, error) => { - if (error !== false) { - await testFailure(files, entrypointFilePath, allowUndefined, error) - } else { - await testSuccess(files, entrypointFilePath, allowUndefined) - } - }) - }) - } - - describe('Test regular imports', () => { - testCases('Local imports', [ - [ - { - '/a.js': 'export const a = "a";', - '/b.js': stripIndent` - import { a } from "./a.js"; - - export function b() { - return a; - } - ` - }, - '/b.js', - false, - false - ], - [ - { - '/a.js': 'export const a = "a";', - '/b.js': stripIndent` - import { a, unknown } from "./a.js"; - - export function b() { - return a; - } - ` - }, - '/b.js', - false, - { moduleName: '/a.js', line: 1, col: 12, symbol: 'unknown' } - ] - ]) - - testCases('Source imports', [ - [ - { - '/a.js': stripIndent` - import { foo, bar } from "one_module"; - export function b() { - return foo(); - } - ` - }, - '/a.js', - false, - false - ], - [ - { - '/a.js': stripIndent` - import { foo, bar } from "one_module"; - export function b() { - return foo(); - } - ` - }, - '/a.js', - false, - false - ] - ]) - - testCases('Source and Local imports', [ - [ - { - '/a.js': 'export const a = "a";', - '/b.js': stripIndent` - import { a } from "./a.js"; - import { bar } from 'one_module'; - - export function b() { - bar(); - return a; - } - ` - }, - '/b.js', - false, - false - ], - [ - { - '/a.js': 'export const a = "a";', - '/b.js': stripIndent` - import { a } from "./a.js"; - import { unknown } from 'one_module'; - - export function b() { - unknown(); - return a; - } - ` - }, - '/b.js', - false, - { moduleName: 'one_module', line: 2, col: 9, symbol: 'unknown' } - ], - [ - { - '/a.js': 'export const a = "a";', - '/b.js': stripIndent` - import { a, unknown } from "./a.js"; - import { foo } from 'one_module'; - - export function b() { - foo(); - return a; - } - ` - }, - '/b.js', - false, - { moduleName: '/a.js', line: 1, col: 12, symbol: 'unknown' } - ] - ]) - }) - - describe('Test default imports', () => { - testCases('Local imports', [ - [ - { - '/a.js': 'const a = "a"; export default a;', - '/b.js': stripIndent` - import a from "./a.js"; - - export function b() { - return a; - } - ` - }, - '/b.js', - false, - false - ], - [ - { - '/a.js': 'export const a = "a";', - '/b.js': stripIndent` - import unknown, { a } from "./a.js"; - - export function b() { - return a; - } - ` - }, - '/b.js', - false, - { moduleName: '/a.js', line: 1, col: 12 } - ] - ]) - - testCases('Source imports', [ - [ - { - '/a.js': stripIndent` - import foo from "one_module"; - export function b() { - return foo(); - } - ` - }, - '/a.js', - false, - false - ] - ]) - - testCases('Source and Local imports', [ - [ - { - '/a.js': 'export const a = "a";', - '/b.js': stripIndent` - import { a } from "./a.js"; - import { bar } from 'one_module'; - - export function b() { - bar(); - return a; - } - ` - }, - '/b.js', - false, - false - ], - [ - { - '/a.js': 'export const a = "a";', - '/b.js': stripIndent` - import { a } from "./a.js"; - import { unknown } from 'one_module'; - - export function b() { - unknown(); - return a; - } - ` - }, - '/b.js', - false, - { moduleName: 'one_module', line: 2, col: 9, symbol: 'unknown' } - ], - [ - { - '/a.js': 'export const a = "a";', - '/b.js': stripIndent` - import { a, unknown } from "./a.js"; - import { foo } from 'one_module'; - - export function b() { - foo(); - return a; - } - ` - }, - '/b.js', - false, - { moduleName: '/a.js', line: 1, col: 12, symbol: 'unknown' } - ] - ]) - }) -}) - -describe('Test reexport symbol errors', () => {}) diff --git a/src/localImports/__tests__/directedGraph.ts b/src/localImports/__tests__/directedGraph.ts deleted file mode 100644 index 9e4563638..000000000 --- a/src/localImports/__tests__/directedGraph.ts +++ /dev/null @@ -1,142 +0,0 @@ -import { DirectedGraph } from '../directedGraph' - -describe('addEdge', () => { - it('throws an error if the source and destination nodes are the same', () => { - const graph = new DirectedGraph() - expect(() => graph.addEdge('A', 'A')).toThrowError( - 'Edges that connect a node to itself are not allowed.' - ) - }) -}) - -describe('hasEdge', () => { - it('returns false if the edge does not exist in the graph', () => { - const graph = new DirectedGraph() - expect(graph.hasEdge('A', 'B')).toBe(false) - }) - - it('returns false if the reversed edge exists in the graph, but not the edge itself', () => { - const graph = new DirectedGraph() - graph.addEdge('B', 'A') - expect(graph.hasEdge('A', 'B')).toBe(false) - }) - - it('returns true if the edge exists in the graph', () => { - const graph = new DirectedGraph() - graph.addEdge('A', 'B') - expect(graph.hasEdge('A', 'B')).toBe(true) - }) -}) - -describe('Topological ordering', () => { - it('returns the first cycle found when the graph is not acyclic 1', () => { - const graph = new DirectedGraph() - graph.addEdge('A', 'B') - graph.addEdge('B', 'C') - graph.addEdge('C', 'D') - graph.addEdge('D', 'E') - graph.addEdge('E', 'B') - - const topologicalOrderResult = graph.getTopologicalOrder() - expect(topologicalOrderResult.isValidTopologicalOrderFound).toBe(false) - expect([ - ['B', 'C', 'D', 'E', 'B'], - ['C', 'D', 'E', 'B', 'C'], - ['D', 'E', 'B', 'C', 'D'], - ['E', 'B', 'C', 'D', 'E'] - ]).toContainEqual(topologicalOrderResult.firstCycleFound) - }) - - it('returns the first cycle found when the graph is not acyclic 2', () => { - const graph = new DirectedGraph() - graph.addEdge('A', 'B') - graph.addEdge('B', 'C') - graph.addEdge('C', 'A') - graph.addEdge('C', 'D') - graph.addEdge('D', 'E') - graph.addEdge('E', 'C') - - const topologicalOrderResult = graph.getTopologicalOrder() - expect(topologicalOrderResult.isValidTopologicalOrderFound).toBe(false) - expect([ - ['A', 'B', 'C', 'A'], - ['B', 'C', 'A', 'B'], - ['C', 'A', 'B', 'C'], - ['C', 'D', 'E', 'C'], - ['D', 'E', 'C', 'D'], - ['E', 'C', 'D', 'E'] - ]).toContainEqual(topologicalOrderResult.firstCycleFound) - }) - - it('returns the first cycle found when the graph is not acyclic 3', () => { - const graph = new DirectedGraph() - graph.addEdge('A', 'B') - graph.addEdge('B', 'C') - graph.addEdge('C', 'A') - graph.addEdge('A', 'D') - graph.addEdge('D', 'C') - - const topologicalOrderResult = graph.getTopologicalOrder() - expect(topologicalOrderResult.isValidTopologicalOrderFound).toBe(false) - expect([ - ['A', 'B', 'C', 'A'], - ['B', 'C', 'A', 'B'], - ['C', 'A', 'B', 'C'], - ['A', 'D', 'C', 'A'], - ['D', 'C', 'A', 'D'], - ['C', 'A', 'D', 'C'] - ]).toContainEqual(topologicalOrderResult.firstCycleFound) - }) - - it('returns an empty array when the graph has no nodes', () => { - const graph = new DirectedGraph() - - const topologicalOrderResult = graph.getTopologicalOrder() - expect(topologicalOrderResult.isValidTopologicalOrderFound).toBe(true) - expect(topologicalOrderResult.topologicalOrder).toEqual([]) - }) - - it('returns a topological ordering if the graph is acyclic 1', () => { - const graph = new DirectedGraph() - graph.addEdge('A', 'B') - graph.addEdge('B', 'C') - graph.addEdge('C', 'D') - graph.addEdge('D', 'E') - - const topologicalOrderResult = graph.getTopologicalOrder() - expect(topologicalOrderResult.isValidTopologicalOrderFound).toBe(true) - expect(topologicalOrderResult.topologicalOrder).toEqual(['A', 'B', 'C', 'D', 'E']) - }) - - it('returns a topological ordering if the graph is acyclic 2', () => { - const graph = new DirectedGraph() - graph.addEdge('A', 'B') - graph.addEdge('A', 'C') - graph.addEdge('B', 'D') - graph.addEdge('C', 'D') - - const topologicalOrderResult = graph.getTopologicalOrder() - expect(topologicalOrderResult.isValidTopologicalOrderFound).toBe(true) - expect([ - ['A', 'B', 'C', 'D'], - ['A', 'C', 'B', 'D'] - ]).toContainEqual(topologicalOrderResult.topologicalOrder) - }) - - it('returns a topological ordering if the graph is acyclic 3', () => { - const graph = new DirectedGraph() - graph.addEdge('A', 'B') - graph.addEdge('C', 'D') - - const topologicalOrderResult = graph.getTopologicalOrder() - expect(topologicalOrderResult.isValidTopologicalOrderFound).toBe(true) - expect([ - ['A', 'B', 'C', 'D'], - ['A', 'C', 'B', 'D'], - ['A', 'C', 'D', 'B'], - ['C', 'A', 'B', 'D'], - ['C', 'A', 'D', 'B'], - ['C', 'D', 'A', 'B'] - ]).toContainEqual(topologicalOrderResult.topologicalOrder) - }) -}) diff --git a/src/localImports/__tests__/errorMessages.ts b/src/localImports/__tests__/errorMessages.ts deleted file mode 100644 index 31c912c4b..000000000 --- a/src/localImports/__tests__/errorMessages.ts +++ /dev/null @@ -1,211 +0,0 @@ -import { parseError, runFilesInContext } from '../../index' -import { mockContext } from '../../mocks/context' -import { Chapter, Variant } from '../../types' - -describe('syntax errors', () => { - let context = mockContext(Chapter.SOURCE_4) - - beforeEach(() => { - context = mockContext(Chapter.SOURCE_4) - }) - - describe('FatalSyntaxError', () => { - test('file path is not part of error message if the program is single-file', async () => { - const files: Record = { - '/a.js': ` - const x = 1; - const x = 1; - ` - } - await runFilesInContext(files, '/a.js', context) - expect(parseError(context.errors)).toMatchInlineSnapshot( - `"Line 3: SyntaxError: Identifier 'x' has already been declared (3:16)"` - ) - }) - - test('file path is part of error message if the program is multi-file', async () => { - const files: Record = { - '/a.js': ` - const x = 1; - const x = 1; - `, - '/b.js': ` - const y = 2; - ` - } - await runFilesInContext(files, '/a.js', context) - expect(parseError(context.errors)).toMatchInlineSnapshot( - `"[/a.js] Line 3: SyntaxError: Identifier 'x' has already been declared (3:16)"` - ) - }) - }) - - describe('MissingSemicolonError', () => { - test('file path is not part of error message if the program is single-file', async () => { - const files: Record = { - '/a.js': ` - const x = 1 - ` - } - await runFilesInContext(files, '/a.js', context) - expect(parseError(context.errors)).toMatchInlineSnapshot( - `"Line 2: Missing semicolon at the end of statement"` - ) - }) - - test('file path is part of error message if the program is multi-file', async () => { - const files: Record = { - '/a.js': ` - const x = 1 - `, - '/b.js': ` - const y = 2; - ` - } - await runFilesInContext(files, '/a.js', context) - expect(parseError(context.errors)).toMatchInlineSnapshot( - `"[/a.js] Line 2: Missing semicolon at the end of statement"` - ) - }) - }) - - describe('TrailingCommaError', () => { - test('file path is not part of error message if the program is single-file', async () => { - const files: Record = { - '/a.js': ` - const x = [1, 2, 3,]; - ` - } - await runFilesInContext(files, '/a.js', context) - expect(parseError(context.errors)).toMatchInlineSnapshot(`"Line 2: Trailing comma"`) - }) - - test('file path is part of error message if the program is multi-file', async () => { - const files: Record = { - '/a.js': ` - const x = [1, 2, 3,]; - `, - '/b.js': ` - const y = 2; - ` - } - await runFilesInContext(files, '/a.js', context) - expect(parseError(context.errors)).toMatchInlineSnapshot(`"[/a.js] Line 2: Trailing comma"`) - }) - }) -}) - -describe('non-syntax errors (non-transpiled)', () => { - let context = mockContext(Chapter.SOURCE_4) - - beforeEach(() => { - context = mockContext(Chapter.SOURCE_4) - context.executionMethod = 'interpreter' - }) - - describe('SourceError', () => { - test('file path is not part of error message if the program is single-file', async () => { - const files: Record = { - '/a.js': ` - 1 + 'hello'; - ` - } - await runFilesInContext(files, '/a.js', context) - expect(parseError(context.errors)).toMatchInlineSnapshot( - `"Line 2: Expected number on right hand side of operation, got string."` - ) - }) - - test('file path is part of error message if the program is multi-file', async () => { - const files: Record = { - '/a.js': ` - 1 + 'hello'; - `, - '/b.js': ` - const y = 2; - ` - } - await runFilesInContext(files, '/a.js', context) - expect(parseError(context.errors)).toMatchInlineSnapshot( - `"[/a.js] Line 2: Expected number on right hand side of operation, got string."` - ) - }) - }) -}) - -describe('non-syntax errors (transpiled)', () => { - let context = mockContext(Chapter.SOURCE_4) - - beforeEach(() => { - context = mockContext(Chapter.SOURCE_4) - context.executionMethod = 'native' - }) - - describe('SourceError', () => { - test('file path is not part of error message if the program is single-file', async () => { - const files: Record = { - '/a.js': ` - 1 + 'hello'; - ` - } - await runFilesInContext(files, '/a.js', context) - expect(parseError(context.errors)).toMatchInlineSnapshot( - `"Line 2: Expected number on right hand side of operation, got string."` - ) - }) - - test('file path is part of error message if the program is multi-file', async () => { - const files: Record = { - '/a.js': ` - 1 + 'hello'; - `, - '/b.js': ` - const y = 2; - ` - } - await runFilesInContext(files, '/a.js', context) - expect(parseError(context.errors)).toMatchInlineSnapshot( - `"[/a.js] Line 2: Expected number on right hand side of operation, got string."` - ) - }) - }) -}) - -// We specifically test typed Source because it makes use of the Babel parser. -describe('non-syntax errors (non-transpiled & typed)', () => { - let context = mockContext(Chapter.SOURCE_4, Variant.TYPED) - - beforeEach(() => { - context = mockContext(Chapter.SOURCE_4, Variant.TYPED) - context.executionMethod = 'interpreter' - }) - - describe('SourceError', () => { - test('file path is not part of error message if the program is single-file', async () => { - const files: Record = { - '/a.js': ` - 2 + 'hello'; - ` - } - await runFilesInContext(files, '/a.js', context) - expect(parseError(context.errors)).toMatchInlineSnapshot( - `"Line 2: Type 'string' is not assignable to type 'number'."` - ) - }) - - test('file path is part of error message if the program is multi-file', async () => { - const files: Record = { - '/a.js': ` - 2 + 'hello'; - `, - '/b.js': ` - const y = 2; - ` - } - await runFilesInContext(files, '/a.js', context) - expect(parseError(context.errors)).toMatchInlineSnapshot( - `"[/a.js] Line 2: Type 'string' is not assignable to type 'number'."` - ) - }) - }) -}) diff --git a/src/localImports/__tests__/preprocessor.ts b/src/localImports/__tests__/preprocessor.ts deleted file mode 100644 index d22bb9e0a..000000000 --- a/src/localImports/__tests__/preprocessor.ts +++ /dev/null @@ -1,424 +0,0 @@ -import { parseError } from '../../index' -import { mockContext } from '../../mocks/context' -import { accessExportFunctionName, defaultExportLookupName } from '../../stdlib/localImport.prelude' -import { Chapter } from '../../types' -import preprocessFileImports from '../preprocessor' -import { parseCodeError, stripLocationInfo } from './utils' -import hoistAndMergeImports from '../transformers/hoistAndMergeImports' -import { generate } from 'astring' -import { Program } from 'estree' -import { parse } from '../../parser/parser' - -// The preprocessor now checks for the existence of source modules -// so this is here to solve that issue - -/* -describe('getImportedLocalModulePaths', () => { - let context = mockContext(Chapter.LIBRARY_PARSER) - - beforeEach(() => { - context = mockContext(Chapter.LIBRARY_PARSER) - }) - - const assertCorrectModulePathsAreReturned = ( - code: string, - baseFilePath: string, - expectedModulePaths: string[] - ): void => { - const program = parse(code, context) - if (program === null) { - throw parseCodeError - } - expect(getImportedLocalModulePaths(program, baseFilePath)).toEqual(new Set(expectedModulePaths)) - } - - it('throws an error if the current file path is not absolute', () => { - const code = '' - const program = parse(code, context) - if (program === null) { - throw parseCodeError - } - expect(() => getImportedLocalModulePaths(program, 'a.js')).toThrowError( - "Current file path 'a.js' is not absolute." - ) - }) - - it('returns local (relative) module imports', () => { - const code = ` - import { x } from "./dir2/b.js"; - import { y } from "../dir3/c.js"; - ` - assertCorrectModulePathsAreReturned(code, '/dir/a.js', ['/dir/dir2/b.js', '/dir3/c.js']) - }) - - it('returns local (absolute) module imports', () => { - const code = ` - import { x } from "/dir/dir2/b.js"; - import { y } from "/dir3/c.js"; - ` - assertCorrectModulePathsAreReturned(code, '/dir/a.js', ['/dir/dir2/b.js', '/dir3/c.js']) - }) - - it('does not return Source module imports', () => { - const code = ` - import { x } from "rune"; - import { y } from "sound"; - ` - assertCorrectModulePathsAreReturned(code, '/dir/a.js', []) - }) - - it('gracefully handles overly long sequences of double dots (..)', () => { - const code = `import { x } from "../../../../../../../../../b.js"; - ` - assertCorrectModulePathsAreReturned(code, '/dir/a.js', ['/b.js']) - }) - - it('returns unique module paths', () => { - const code = ` - import { a } from "./b.js"; - import { b } from "./b.js"; - import { c } from "./c.js"; - import { d } from "./c.js"; - ` - assertCorrectModulePathsAreReturned(code, '/dir/a.js', ['/dir/b.js', '/dir/c.js']) - }) -}) -*/ - -describe('preprocessFileImports', () => { - let actualContext = mockContext(Chapter.LIBRARY_PARSER) - let expectedContext = mockContext(Chapter.LIBRARY_PARSER) - - beforeEach(() => { - actualContext = mockContext(Chapter.LIBRARY_PARSER) - expectedContext = mockContext(Chapter.LIBRARY_PARSER) - }) - - const assertASTsAreEquivalent = ( - actualProgram: Program | undefined, - expectedCode: string - ): void => { - // assert(actualProgram !== undefined, 'Actual program should not be undefined') - if (!actualProgram) { - // console.log(actualContext.errors[0], 'occurred at:', actualContext.errors[0].location.start) - throw new Error('Actual program should not be undefined!') - } - - const expectedProgram = parse(expectedCode, expectedContext) - if (expectedProgram === null) { - throw parseCodeError - } - - expect(stripLocationInfo(actualProgram)).toEqual(stripLocationInfo(expectedProgram)) - } - - const testAgainstSnapshot = (program: Program | undefined | null) => { - if (!program) { - throw parseCodeError - } - - hoistAndMergeImports(program, [program]) - - expect(generate(program)).toMatchSnapshot() - } - - it('returns undefined if the entrypoint file does not exist', async () => { - const files: Record = { - '/a.js': '1 + 2;' - } - const actualProgram = await preprocessFileImports(files, '/non-existent-file.js', actualContext) - expect(actualProgram).toBeUndefined() - }) - - it('returns the same AST if the entrypoint file does not contain import/export statements', async () => { - const files: Record = { - '/a.js': ` - function square(x) { - return x * x; - } - square(5); - ` - } - const expectedCode = files['/a.js'] - const actualProgram = await preprocessFileImports(files, '/a.js', actualContext) - assertASTsAreEquivalent(actualProgram, expectedCode) - }) - - it('removes all export-related AST nodes', async () => { - const files: Record = { - '/a.js': ` - export const x = 42; - export let y = 53; - export function square(x) { - return x * x; - } - export const id = x => x; - export default function cube(x) { - return x * x * x; - } - ` - } - const expectedCode = ` - const x = 42; - let y = 53; - function square(x) { - return x * x; - } - const id = x => x; - function cube(x) { - return x * x * x; - } - ` - const actualProgram = await preprocessFileImports(files, '/a.js', actualContext) - assertASTsAreEquivalent(actualProgram, expectedCode) - }) - - it('ignores Source module imports & removes all non-Source module import-related AST nodes in the preprocessed program', async () => { - const files: Record = { - '/a.js': ` - import d, { a, b, c } from "one_module"; - import w, { x, y, z } from "./not-source-module.js"; - `, - '/not-source-module.js': ` - export const x = 1; - export const y = 2; - export const z = 3; - export default function square(x) { - return x * x; - } - ` - } - // const expectedCode = ` - // import { a, b, c } from "one_module"; - - // function __$not$$dash$$source$$dash$$module$$dot$$js__() { - // const x = 1; - // const y = 2; - // const z = 3; - // function square(x) { - // return x * x; - // } - - // return pair(square, list(pair("x", x), pair("y", y), pair("z", z))); - // } - - // const ___$not$$dash$$source$$dash$$module$$dot$$js___ = __$not$$dash$$source$$dash$$module$$dot$$js__(); - - // const w = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "${defaultExportLookupName}"); - // const x = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "x"); - // const y = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "y"); - // const z = ${accessExportFunctionName}(___$not$$dash$$source$$dash$$module$$dot$$js___, "z"); - // ` - const actualProgram = await preprocessFileImports(files, '/a.js', actualContext, { - allowUndefinedImports: true - }) - testAgainstSnapshot(actualProgram) - // assertASTsAreEquivalent(actualProgram, expectedCode) - }) - - it('collates Source module imports at the start of the top-level environment of the preprocessed program', async () => { - const files: Record = { - '/a.js': ` - import { b } from "./b.js"; - import { w, x } from "one_module"; - import { f, g } from "other_module"; - - b; - `, - '/b.js': ` - import { square } from "./c.js"; - import { x, y } from "one_module"; - import { h } from "another_module"; - - export const b = square(5); - `, - '/c.js': ` - import { x, y, z } from "one_module"; - - export const square = x => x * x; - ` - } - // const expectedCode = ` - // import { w, x, y, z } from "one_module"; - // import { f, g } from "other_module"; - // import { h } from "another_module"; - - // function __$b$$dot$$js__(___$c$$dot$$js___) { - // const square = ${accessExportFunctionName}(___$c$$dot$$js___, "square"); - - // const b = square(5); - - // return pair(null, list(pair("b", b))); - // } - - // function __$c$$dot$$js__() { - // const square = x => x * x; - - // return pair(null, list(pair("square", square))); - // } - - // const ___$c$$dot$$js___ = __$c$$dot$$js__(); - // const ___$b$$dot$$js___ = __$b$$dot$$js__(___$c$$dot$$js___); - - // const b = ${accessExportFunctionName}(___$b$$dot$$js___, "b"); - - // b; - // ` - const actualProgram = await preprocessFileImports(files, '/a.js', actualContext, { - allowUndefinedImports: true - }) - testAgainstSnapshot(actualProgram) - // assertASTsAreEquivalent(actualProgram, expectedCode) - }) - - it('returns CircularImportError if there are circular imports', async () => { - const files: Record = { - '/a.js': ` - import { b } from "./b.js"; - - export const a = 1; - `, - '/b.js': ` - import { c } from "./c.js"; - - export const b = 2; - `, - '/c.js': ` - import { a } from "./a.js"; - - export const c = 3; - ` - } - await preprocessFileImports(files, '/a.js', actualContext) - expect(parseError(actualContext.errors)).toMatchInlineSnapshot( - `"Circular import detected: '/c.js' -> '/a.js' -> '/b.js' -> '/c.js'."` - ) - }) - - it('returns CircularImportError if there are circular imports - verbose', async () => { - const files: Record = { - '/a.js': ` - import { b } from "./b.js"; - - export const a = 1; - `, - '/b.js': ` - import { c } from "./c.js"; - - export const b = 2; - `, - '/c.js': ` - import { a } from "./a.js"; - - export const c = 3; - ` - } - await preprocessFileImports(files, '/a.js', actualContext) - expect(parseError(actualContext.errors, true)).toMatchInlineSnapshot(` - "Circular import detected: '/c.js' -> '/a.js' -> '/b.js' -> '/c.js'. - Break the circular import cycle by removing imports from any of the offending files. - " - `) - }) - - it('returns CircularImportError if there are self-imports', async () => { - const files: Record = { - '/a.js': ` - import { y } from "./a.js"; - const x = 1; - export { x as y }; - ` - } - await preprocessFileImports(files, '/a.js', actualContext) - expect(parseError(actualContext.errors)).toMatchInlineSnapshot( - `"Circular import detected: '/a.js' -> '/a.js'."` - ) - }) - - it('returns CircularImportError if there are self-imports - verbose', async () => { - const files: Record = { - '/a.js': ` - import { y } from "./a.js"; - const x = 1; - export { x as y }; - ` - } - await preprocessFileImports(files, '/a.js', actualContext) - expect(parseError(actualContext.errors, true)).toMatchInlineSnapshot(` - "Circular import detected: '/a.js' -> '/a.js'. - Break the circular import cycle by removing imports from any of the offending files. - " - `) - }) - - it('returns a preprocessed program with all imports', async () => { - const files: Record = { - '/a.js': ` - import { a as x, b as y } from "./b.js"; - - x + y; - `, - '/b.js': ` - import y, { square } from "./c.js"; - - const a = square(y); - const b = 3; - export { a, b }; - `, - '/c.js': ` - import { mysteryFunction } from "./d.js"; - - const x = mysteryFunction(5); - export function square(x) { - return x * x; - } - export default x; - `, - '/d.js': ` - const addTwo = x => x + 2; - export { addTwo as mysteryFunction }; - ` - } - const expectedCode = ` - function __$b$$dot$$js__(___$c$$dot$$js___) { - const y = ${accessExportFunctionName}(___$c$$dot$$js___, "${defaultExportLookupName}"); - const square = ${accessExportFunctionName}(___$c$$dot$$js___, "square"); - - const a = square(y); - const b = 3; - - return pair(null, list(pair("a", a), pair("b", b))); - } - - function __$c$$dot$$js__(___$d$$dot$$js___) { - const mysteryFunction = ${accessExportFunctionName}(___$d$$dot$$js___, "mysteryFunction"); - - const x = mysteryFunction(5); - function square(x) { - return x * x; - } - - return pair(x, list(pair("square", square))); - } - - function __$d$$dot$$js__() { - const addTwo = x => x + 2; - - return pair(null, list(pair("mysteryFunction", addTwo))); - } - - const ___$d$$dot$$js___ = __$d$$dot$$js__(); - const ___$c$$dot$$js___ = __$c$$dot$$js__(___$d$$dot$$js___); - const ___$b$$dot$$js___ = __$b$$dot$$js__(___$c$$dot$$js___); - - const x = ${accessExportFunctionName}(___$b$$dot$$js___, "a"); - const y = ${accessExportFunctionName}(___$b$$dot$$js___, "b"); - - x + y; - ` - const actualProgram = await preprocessFileImports(files, '/a.js', actualContext, { - allowUndefinedImports: true - }) - assertASTsAreEquivalent(actualProgram, expectedCode) - }) -}) diff --git a/src/localImports/__tests__/transformers/__snapshots__/hoistAndMergeImports.ts.snap b/src/localImports/__tests__/transformers/__snapshots__/hoistAndMergeImports.ts.snap deleted file mode 100644 index 0e387b4ca..000000000 --- a/src/localImports/__tests__/transformers/__snapshots__/hoistAndMergeImports.ts.snap +++ /dev/null @@ -1,21 +0,0 @@ -// Jest Snapshot v1, https://goo.gl/fbAQLP - -exports[`hoistAndMergeImports hoists import declarations to the top of the program 1`] = ` -"import x from \\"source-module\\"; -function square(x) { - return x * x; -} -import {a, b, c} from \\"./a.js\\"; -export {square}; -import x from \\"source-module\\"; -square(3); -" -`; - -exports[`hoistAndMergeImports merges import declarations from the same module 1`] = ` -"import {a, b, c} from \\"./a.js\\"; -import {d} from \\"./a.js\\"; -import {x} from \\"./b.js\\"; -import {e, f} from \\"./a.js\\"; -" -`; diff --git a/src/localImports/__tests__/transformers/hoistAndMergeImports.ts b/src/localImports/__tests__/transformers/hoistAndMergeImports.ts deleted file mode 100644 index cbf21444b..000000000 --- a/src/localImports/__tests__/transformers/hoistAndMergeImports.ts +++ /dev/null @@ -1,83 +0,0 @@ -import { generate } from 'astring' -import { mockContext } from '../../../mocks/context' -import { parse } from '../../../parser/parser' -import { Chapter } from '../../../types' -import hoistAndMergeImports from '../../transformers/hoistAndMergeImports' -import { parseCodeError, stripLocationInfo } from '../utils' - -describe('hoistAndMergeImports', () => { - let actualContext = mockContext(Chapter.LIBRARY_PARSER) - let expectedContext = mockContext(Chapter.LIBRARY_PARSER) - - beforeEach(() => { - actualContext = mockContext(Chapter.LIBRARY_PARSER) - expectedContext = mockContext(Chapter.LIBRARY_PARSER) - }) - - const assertASTsAreEquivalent = (actualCode: string, expectedCode: string): void => { - const actualProgram = parse(actualCode, actualContext) - const expectedProgram = parse(expectedCode, expectedContext) - if (actualProgram === null || expectedProgram === null) { - throw parseCodeError - } - - hoistAndMergeImports(actualProgram, [actualProgram]) - expect(stripLocationInfo(actualProgram)).toEqual(stripLocationInfo(expectedProgram)) - } - - const testAgainstSnapshot = (code: string) => { - const program = parse(code, actualContext) - if (program === null) { - throw parseCodeError - } - - hoistAndMergeImports(program, [program]) - expect(generate(program)).toMatchSnapshot() - } - - test('hoists import declarations to the top of the program', () => { - const actualCode = ` - function square(x) { - return x * x; - } - - import { a, b, c } from "./a.js"; - - export { square }; - - import x from "source-module"; - - square(3); - ` - testAgainstSnapshot(actualCode) - const expectedCode = ` - import { a, b, c } from "./a.js"; - import x from "source-module"; - - function square(x) { - return x * x; - } - - export { square }; - - square(3); - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - test('merges import declarations from the same module', () => { - const actualCode = ` - import { a, b, c } from "./a.js"; - import { d } from "./a.js"; - import { x } from "./b.js"; - import { e, f } from "./a.js"; - ` - - testAgainstSnapshot(actualCode) - // const expectedCode = ` - // import { a, b, c, d, e, f } from "./a.js"; - // import { x } from "./b.js"; - // ` - // assertASTsAreEquivalent(actualCode, expectedCode) - }) -}) diff --git a/src/localImports/__tests__/transformers/transformProgramToFunctionDeclaration.ts b/src/localImports/__tests__/transformers/transformProgramToFunctionDeclaration.ts deleted file mode 100644 index b3221ec50..000000000 --- a/src/localImports/__tests__/transformers/transformProgramToFunctionDeclaration.ts +++ /dev/null @@ -1,435 +0,0 @@ -import { mockContext } from '../../../mocks/context' -import { parse } from '../../../parser/parser' -import { defaultExportLookupName } from '../../../stdlib/localImport.prelude' -import { Chapter } from '../../../types' -import { transformProgramToFunctionDeclaration } from '../../transformers/transformProgramToFunctionDeclaration' -import { parseCodeError, stripLocationInfo } from '../utils' - -describe('transformImportedFile', () => { - const currentFileName = '/dir/a.js' - const functionName = '__$dir$a$$dot$$js__' - let actualContext = mockContext(Chapter.LIBRARY_PARSER) - let expectedContext = mockContext(Chapter.LIBRARY_PARSER) - - beforeEach(() => { - actualContext = mockContext(Chapter.LIBRARY_PARSER) - expectedContext = mockContext(Chapter.LIBRARY_PARSER) - }) - - const assertASTsAreEquivalent = (actualCode: string, expectedCode: string): void => { - const actualProgram = parse(actualCode, actualContext) - const expectedProgram = parse(expectedCode, expectedContext) - if (actualProgram === null || expectedProgram === null) { - throw parseCodeError - } - - const actualFunctionDeclaration = transformProgramToFunctionDeclaration( - actualProgram, - currentFileName - ) - const expectedFunctionDeclaration = expectedProgram.body[0] - expect(expectedFunctionDeclaration.type).toEqual('FunctionDeclaration') - expect(stripLocationInfo(actualFunctionDeclaration)).toEqual( - stripLocationInfo(expectedFunctionDeclaration) - ) - } - - it('wraps the program body in a FunctionDeclaration', () => { - const actualCode = ` - const square = x => x * x; - const x = 42; - ` - const expectedCode = ` - function ${functionName}() { - const square = x => x * x; - const x = 42; - - return pair(null, list()); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('returns only exported variables', () => { - const actualCode = ` - const x = 42; - export let y = 53; - ` - const expectedCode = ` - function ${functionName}() { - const x = 42; - let y = 53; - - return pair(null, list(pair("y", y))); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('returns only exported functions', () => { - const actualCode = ` - function id(x) { - return x; - } - export function square(x) { - return x * x; - } - ` - const expectedCode = ` - function ${functionName}() { - function id(x) { - return x; - } - function square(x) { - return x * x; - } - - return pair(null, list(pair("square", square))); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('returns only exported arrow functions', () => { - const actualCode = ` - const id = x => x; - export const square = x => x * x; - ` - const expectedCode = ` - function ${functionName}() { - const id = x => x; - const square = x => x * x; - - return pair(null, list(pair("square", square))); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('returns all exported names when there are multiple', () => { - const actualCode = ` - export const x = 42; - export let y = 53; - export function id(x) { - return x; - } - export const square = x => x * x; - ` - const expectedCode = ` - function ${functionName}() { - const x = 42; - let y = 53; - function id(x) { - return x; - } - const square = x => x * x; - - return pair(null, list(pair("x", x), pair("y", y), pair("id", id), pair("square", square))); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('returns all exported names in {}-notation', () => { - const actualCode = ` - const x = 42; - let y = 53; - function id(x) { - return x; - } - const square = x => x * x; - export { x, y, id, square }; - ` - const expectedCode = ` - function ${functionName}() { - const x = 42; - let y = 53; - function id(x) { - return x; - } - const square = x => x * x; - - return pair(null, list(pair("x", x), pair("y", y), pair("id", id), pair("square", square))); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('returns renamed exported names', () => { - const actualCode = ` - const x = 42; - let y = 53; - function id(x) { - return x; - } - const square = x => x * x; - export { x as y, y as x, id as identity, square as sq }; - ` - const expectedCode = ` - function ${functionName}() { - const x = 42; - let y = 53; - function id(x) { - return x; - } - const square = x => x * x; - - return pair(null, list(pair("y", x), pair("x", y), pair("identity", id), pair("sq", square))); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - // Default exports of variable declarations and arrow function declarations - // is not allowed in ES6, and will be caught by the Acorn parser. - it('returns default export of function declaration', () => { - const actualCode = ` - function id(x) { - return x; - } - export default function square(x) { - return x * x; - } - ` - const expectedCode = ` - function ${functionName}() { - function id(x) { - return x; - } - function square(x) { - return x * x; - } - - return pair(square, list()); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('returns default export of variable', () => { - const actualCode = ` - const x = 42; - let y = 53; - export default y; - ` - const expectedCode = ` - function ${functionName}() { - const x = 42; - let y = 53; - - return pair(y, list()); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('returns default export of function', () => { - const actualCode = ` - function id(x) { - return x; - } - function square(x) { - return x * x; - } - export default square; - ` - const expectedCode = ` - function ${functionName}() { - function id(x) { - return x; - } - function square(x) { - return x * x; - } - - return pair(square, list()); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('returns default export of arrow function', () => { - const actualCode = ` - const id = x => x; - const square = x => x * x; - export default square; - ` - const expectedCode = ` - function ${functionName}() { - const id = x => x; - const square = x => x * x; - - return pair(square, list()); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('returns default export of expression 1', () => { - const actualCode = ` - export default 123; - ` - const expectedCode = ` - function ${functionName}() { - return pair(123, list()); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('returns default export of expression 2', () => { - const actualCode = ` - export default "Hello world!"; - ` - const expectedCode = ` - function ${functionName}() { - return pair("Hello world!", list()); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('returns default export of expression 3', () => { - const actualCode = ` - export default 123 + 456; - ` - const expectedCode = ` - function ${functionName}() { - // Expressions will be reduced when the function is invoked. - return pair(123 + 456, list()); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('returns default export of expression 4', () => { - const actualCode = ` - function square(x) { - return x * x; - } - export default square(10); - ` - const expectedCode = ` - function ${functionName}() { - function square(x) { - return x * x; - } - - // Expressions will be reduced when the function is invoked. - return pair(square(10), list()); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('returns default export in {}-notation', () => { - const actualCode = ` - const x = 42; - let y = 53; - function square(x) { - return x * x; - } - const id = x => x; - export { x, y, square as default, id }; - ` - const expectedCode = ` - function ${functionName}() { - const x = 42; - let y = 53; - function square(x) { - return x * x; - } - const id = x => x; - - return pair(square, list(pair("x", x), pair("y", y), pair("id", id))); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('handles named imports of local (non-Source) modules', () => { - const actualCode = ` - import { x } from "./b.js"; - import { y } from "../dir2/c.js"; - ` - const expectedCode = ` - function ${functionName}(___$dir$b$$dot$$js___, ___$dir2$c$$dot$$js___) { - const x = __access_export__(___$dir$b$$dot$$js___, "x"); - const y = __access_export__(___$dir2$c$$dot$$js___, "y"); - - return pair(null, list()); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('handles default imports of local (non-Source) modules', () => { - const actualCode = ` - import x from "./b.js"; - import y from "../dir2/c.js"; - ` - const expectedCode = ` - function ${functionName}(___$dir$b$$dot$$js___, ___$dir2$c$$dot$$js___) { - const x = __access_export__(___$dir$b$$dot$$js___, "${defaultExportLookupName}"); - const y = __access_export__(___$dir2$c$$dot$$js___, "${defaultExportLookupName}"); - - return pair(null, list()); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('limits resolved file paths to the root of the file system `/`', () => { - const actualCode = ` - import { x } from "../../../../../../../../../dir/b.js"; - import { y } from "../../../../../dir2/c.js"; - ` - const expectedCode = ` - function ${functionName}(___$dir$b$$dot$$js___, ___$dir2$c$$dot$$js___) { - const x = __access_export__(___$dir$b$$dot$$js___, "x"); - const y = __access_export__(___$dir2$c$$dot$$js___, "y"); - - return pair(null, list()); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('merges file paths that resolve to the same file', () => { - const actualCode = ` - import { x } from "./b.js"; - import { y } from "../dir/b.js"; - ` - const expectedCode = ` - function ${functionName}(___$dir$b$$dot$$js___) { - const x = __access_export__(___$dir$b$$dot$$js___, "x"); - const y = __access_export__(___$dir$b$$dot$$js___, "y"); - - return pair(null, list()); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) - - it('handles named imports of local (non-Source) modules when split across multiple import declarations', () => { - const actualCode = ` - import { x } from "./b.js"; - import { y } from "./b.js"; - import { z } from "./b.js"; - - export const a = x + y + z; - ` - const expectedCode = ` - function ${functionName}(___$dir$b$$dot$$js___) { - const x = __access_export__(___$dir$b$$dot$$js___, "x"); - const y = __access_export__(___$dir$b$$dot$$js___, "y"); - const z = __access_export__(___$dir$b$$dot$$js___, "z"); - - const a = x + y + z; - - return pair(null, list(pair("a", a))); - } - ` - assertASTsAreEquivalent(actualCode, expectedCode) - }) -}) diff --git a/src/localImports/__tests__/utils.ts b/src/localImports/__tests__/utils.ts deleted file mode 100644 index a2ee6298f..000000000 --- a/src/localImports/__tests__/utils.ts +++ /dev/null @@ -1,63 +0,0 @@ -import es from 'estree' - -import { full, simple } from '../../utils/ast/walkers' - -export const parseCodeError = new Error('Unable to parse code') - -/** - * Strips out location information from an AST. - * - * The local imports test suites only care about the structure of the - * transformed AST. The line & column numbers, as well as the character - * offsets of each node in the ASTs derived from parsing the pre-transform - * code & the equivalent post-transform code will not be the same. - * Note that it is insufficient to pass in 'locations: false' into the acorn - * parser as there will still be 'start' & 'end' properties attached to nodes - * which represent character offsets. - * - * WARNING: Since this function is only used for test suites, it mutates - * the original AST for convenience instead of creating a copy. - * - * @param node The AST which should be stripped of location information. - */ -export const stripLocationInfo = (node: es.Node): es.Node => { - // The 'start' & 'end' properties are not typed in ESTree, but they exist - // on some nodes in the AST generated by acorn parser. - const deleteLocationProperties = (node: es.Node & { start?: number; end?: number }): void => { - // Line & column numbers - delete node.loc - // Character offsets - delete node.start - delete node.end - } - full(node, (node: es.Node): void => { - deleteLocationProperties(node) - }) - // Unfortunately, acorn-walk does not actually visit all nodes in the AST. - // Namely, Identifier nodes are not visited except when they occur as expressions. - // According to a maintainer of acorn-walk, users of the library are expected to - // read Identifier nodes from their parent node if there is a need to do so, - // although it was not explained why this is the case. - // See https://github.com/acornjs/acorn/issues/1180 for the discussion. - // - // As a workaround, we walk through the AST again specifically to strip the - // location information out of Identifier nodes. - // NOTE: This second walk does not exhaustively visit all Identifier nodes. - // Please add custom walkers as needed. - simple(node, { - ImportSpecifier(node: es.ImportSpecifier): void { - deleteLocationProperties(node.local) - deleteLocationProperties(node.imported) - }, - ImportDefaultSpecifier(node: es.ImportDefaultSpecifier): void { - deleteLocationProperties(node.local) - }, - ExportNamedDeclaration(node: es.ExportNamedDeclaration): void { - node.specifiers.forEach((node: es.ExportSpecifier) => { - deleteLocationProperties(node) - deleteLocationProperties(node.exported) - }) - } - }) - return node -} diff --git a/src/localImports/analyzer.ts b/src/localImports/analyzer.ts deleted file mode 100644 index 112ce4e94..000000000 --- a/src/localImports/analyzer.ts +++ /dev/null @@ -1,135 +0,0 @@ -import type * as es from 'estree' - -import { ReexportSymbolError } from '../errors/localImportErrors' -import { - UndefinedDefaultImportError, - UndefinedImportError, - UndefinedNamespaceImportError -} from '../modules/errors' -import ArrayMap from '../utils/arrayMap' -import { extractIdsFromPattern } from '../utils/ast/astUtils' -import { isDeclaration } from '../utils/ast/typeGuards' -import { simple } from '../utils/ast/walkers' - -const validateDefaultImport = ( - spec: es.ImportDefaultSpecifier | es.ExportSpecifier | es.ImportSpecifier, - sourcePath: string, - modExported: Set -) => { - if (!modExported.has('default')) { - throw new UndefinedDefaultImportError(sourcePath, spec) - } -} - -const validateImport = ( - spec: es.ImportSpecifier | es.ExportSpecifier, - sourcePath: string, - modExported: Set -) => { - const symbol = spec.type === 'ImportSpecifier' ? spec.imported.name : spec.local.name - if (symbol === 'default') { - validateDefaultImport(spec, sourcePath, modExported) - } else if (!modExported.has(symbol)) { - throw new UndefinedImportError(symbol, sourcePath, spec) - } -} - -const validateNamespaceImport = ( - spec: es.ImportNamespaceSpecifier | es.ExportAllDeclaration, - sourcePath: string, - modExported: Set -) => { - if (modExported.size === 0) { - throw new UndefinedNamespaceImportError(sourcePath, spec) - } -} - -/** - * Check for undefined imports, and also for symbols that have multiple export - * definitions - */ -export const validateImportAndExports = ( - moduleDocs: Record | null>, - programs: Record, - topoOrder: string[], - allowUndefinedImports: boolean -) => { - for (const name of topoOrder) { - // Since we're loading in topological order, it is safe to assume that - // program will never be undefined - const program = programs[name] - const exportedSymbols = new ArrayMap< - string, - es.ExportSpecifier | Exclude - >() - - simple(program, { - ImportDeclaration: (node: es.ImportDeclaration) => { - const source = node.source!.value as string - const exports = moduleDocs[source] - if (allowUndefinedImports || !exports) return - - node.specifiers.forEach(spec => { - simple(spec, { - ImportSpecifier: (spec: es.ImportSpecifier) => validateImport(spec, source, exports), - ImportDefaultSpecifier: (spec: es.ImportDefaultSpecifier) => - validateDefaultImport(spec, source, exports), - ImportNamespaceSpecifier: (spec: es.ImportNamespaceSpecifier) => - validateNamespaceImport(spec, source, exports) - }) - }) - }, - ExportDefaultDeclaration: (node: es.ExportDefaultDeclaration) => { - if (isDeclaration(node.declaration)) { - exportedSymbols.add('default', node) - } - }, - ExportNamedDeclaration: (node: es.ExportNamedDeclaration) => { - if (node.declaration) { - if (node.declaration.type === 'VariableDeclaration') { - for (const declaration of node.declaration.declarations) { - extractIdsFromPattern(declaration.id).forEach(id => { - exportedSymbols.add(id.name, node) - }) - } - } else { - exportedSymbols.add(node.declaration.id!.name, node) - } - } else if (node.source) { - const source = node.source!.value as string - const exports = moduleDocs[source] - node.specifiers.forEach(spec => { - if (!allowUndefinedImports && exports) { - validateImport(spec, source, exports) - } - - exportedSymbols.add(spec.exported.name, spec) - }) - } else { - node.specifiers.forEach(spec => exportedSymbols.add(spec.exported.name, spec)) - } - }, - ExportAllDeclaration: (node: es.ExportAllDeclaration) => { - const source = node.source!.value as string - const exports = moduleDocs[source] - if (!allowUndefinedImports && exports) { - validateNamespaceImport(node, source, exports) - } - if (node.exported) { - exportedSymbols.add(node.exported.name, node) - } else if (exports) { - for (const symbol of exports) { - exportedSymbols.add(symbol, node) - } - } - } - }) - - moduleDocs[name] = new Set( - exportedSymbols.entries().map(([symbol, nodes]) => { - if (nodes.length === 1) return symbol - throw new ReexportSymbolError(name, symbol, nodes) - }) - ) - } -} diff --git a/src/localImports/constructors/baseConstructors.ts b/src/localImports/constructors/baseConstructors.ts deleted file mode 100644 index f67fb5c6c..000000000 --- a/src/localImports/constructors/baseConstructors.ts +++ /dev/null @@ -1,132 +0,0 @@ -import es from 'estree' - -// Note that typecasting is done on some of the constructed AST nodes because -// the ESTree AST node types are not fully aligned with the actual AST that -// is generated by the Acorn parser. However, the extra/missing properties -// are unused in the Source interpreter/transpiler. As such, we can safely -// ignore their existence to make the typing cleaner. The alternative would -// be to define our own AST node types based off the ESTree AST node types -// and use our custom AST node types everywhere. - -export const createLiteral = ( - value: string | number | boolean | null, - raw?: string -): es.Literal => { - return { - type: 'Literal', - value, - raw: raw ?? typeof value === 'string' ? `"${value}"` : String(value) - } -} - -export const createIdentifier = (name: string): es.Identifier => { - return { - type: 'Identifier', - name - } -} - -export const createCallExpression = ( - functionName: string, - functionArguments: Array -): es.SimpleCallExpression => { - return { - type: 'CallExpression', - callee: createIdentifier(functionName), - arguments: functionArguments - // The 'optional' property is typed in ESTree, but does not exist - // on SimpleCallExpression nodes in the AST generated by acorn parser. - } as es.SimpleCallExpression -} - -export const createVariableDeclarator = ( - id: es.Identifier, - initialValue: es.Expression | null | undefined = null -): es.VariableDeclarator => { - return { - type: 'VariableDeclarator', - id, - init: initialValue - } -} - -export const createVariableDeclaration = ( - declarations: es.VariableDeclarator[], - kind: 'var' | 'let' | 'const' -): es.VariableDeclaration => { - return { - type: 'VariableDeclaration', - declarations, - kind - } -} - -export const createReturnStatement = ( - argument: es.Expression | null | undefined -): es.ReturnStatement => { - return { - type: 'ReturnStatement', - argument - } -} - -export const createFunctionDeclaration = ( - name: string, - params: es.Pattern[], - body: es.Statement[] -): es.FunctionDeclaration => { - return { - type: 'FunctionDeclaration', - expression: false, - generator: false, - id: { - type: 'Identifier', - name - }, - params, - body: { - type: 'BlockStatement', - body - } - // The 'expression' property is not typed in ESTree, but it exists - // on FunctionDeclaration nodes in the AST generated by acorn parser. - } as es.FunctionDeclaration -} - -export const createImportDeclaration = ( - specifiers: Array, - source: es.Literal -): es.ImportDeclaration => { - return { - type: 'ImportDeclaration', - specifiers, - source - } -} - -export const createImportSpecifier = ( - local: es.Identifier, - imported: es.Identifier -): es.ImportSpecifier => { - return { - type: 'ImportSpecifier', - local, - imported - } -} - -export const createImportDefaultSpecifier = (local: es.Identifier): es.ImportDefaultSpecifier => { - return { - type: 'ImportDefaultSpecifier', - local - } -} - -export const createImportNamespaceSpecifier = ( - local: es.Identifier -): es.ImportNamespaceSpecifier => { - return { - type: 'ImportNamespaceSpecifier', - local - } -} diff --git a/src/localImports/constructors/contextSpecificConstructors.ts b/src/localImports/constructors/contextSpecificConstructors.ts deleted file mode 100644 index 4b8c9d8e4..000000000 --- a/src/localImports/constructors/contextSpecificConstructors.ts +++ /dev/null @@ -1,108 +0,0 @@ -import es from 'estree' - -import { accessExportFunctionName } from '../../stdlib/localImport.prelude' -import { - createCallExpression, - createIdentifier, - createLiteral, - createVariableDeclaration, - createVariableDeclarator -} from './baseConstructors' - -/** - * Constructs a call to the `pair` function. - * - * @param head The head of the pair. - * @param tail The tail of the pair. - */ -export const createPairCallExpression = ( - head: es.Expression | es.SpreadElement, - tail: es.Expression | es.SpreadElement -): es.SimpleCallExpression => { - return createCallExpression('pair', [head, tail]) -} - -/** - * Constructs a call to the `list` function. - * - * @param listElements The elements of the list. - */ -export const createListCallExpression = ( - listElements: Array -): es.SimpleCallExpression => { - return createCallExpression('list', listElements) -} - -/** - * Constructs the AST equivalent of: - * const importedName = __access_export__(functionName, lookupName); - * - * @param functionName The name of the transformed function declaration to import from. - * @param importedName The name of the import. - * @param lookupName The name to lookup in the transformed function declaration. - */ -export const createImportedNameDeclaration = ( - functionName: string, - importedName: es.Identifier, - lookupName: string -): es.VariableDeclaration => { - const callExpression = createCallExpression(accessExportFunctionName, [ - createIdentifier(functionName), - createLiteral(lookupName) - ]) - const variableDeclarator = createVariableDeclarator(importedName, callExpression) - return createVariableDeclaration([variableDeclarator], 'const') -} - -/** - * Constructs the AST equivalent of: - * const variableName = functionName(...functionArgs); - * - * @param functionName The name of the transformed function declaration to invoke. - * @param variableName The name of the variable holding the result of the function invocation. - * @param functionArgs The arguments to be passed when invoking the function. - */ -export const createInvokedFunctionResultVariableDeclaration = ( - functionName: string, - variableName: string, - functionArgs: es.Identifier[] -): es.VariableDeclaration => { - const callExpression = createCallExpression(functionName, functionArgs) - const variableDeclarator = createVariableDeclarator( - createIdentifier(variableName), - callExpression - ) - return createVariableDeclaration([variableDeclarator], 'const') -} - -/** - * Clones the import specifier, but only the properties - * that are part of its ESTree AST type. This is useful for - * stripping out extraneous information on the import - * specifier AST nodes (such as the location information - * that the Acorn parser adds). - * - * @param importSpecifier The import specifier to be cloned. - */ -export const cloneAndStripImportSpecifier = ( - importSpecifier: es.ImportSpecifier | es.ImportDefaultSpecifier | es.ImportNamespaceSpecifier -): es.ImportSpecifier | es.ImportDefaultSpecifier | es.ImportNamespaceSpecifier => { - switch (importSpecifier.type) { - case 'ImportSpecifier': - return { - type: 'ImportSpecifier', - local: createIdentifier(importSpecifier.local.name), - imported: createIdentifier(importSpecifier.imported.name) - } - case 'ImportDefaultSpecifier': - return { - type: 'ImportDefaultSpecifier', - local: createIdentifier(importSpecifier.local.name) - } - case 'ImportNamespaceSpecifier': - return { - type: 'ImportNamespaceSpecifier', - local: createIdentifier(importSpecifier.local.name) - } - } -} diff --git a/src/localImports/directedGraph.ts b/src/localImports/directedGraph.ts deleted file mode 100644 index c7ff436ae..000000000 --- a/src/localImports/directedGraph.ts +++ /dev/null @@ -1,230 +0,0 @@ -/** - * The result of attempting to find a topological ordering - * of nodes on a DirectedGraph. - */ -export type TopologicalOrderResult = - | { - isValidTopologicalOrderFound: true - topologicalOrder: string[] - firstCycleFound: null - } - | { - isValidTopologicalOrderFound: false - topologicalOrder: null - firstCycleFound: string[] - } - -/** - * Represents a directed graph which disallows self-loops. - */ -export class DirectedGraph { - private readonly adjacencyList: Map> - private readonly differentKeysError = new Error( - 'The keys of the adjacency list & the in-degree maps are not the same. This should never occur.' - ) - - constructor() { - this.adjacencyList = new Map() - } - - /** - * Adds a directed edge to the graph from the source node to - * the destination node. Self-loops are not allowed. - * - * @param sourceNode The name of the source node. - * @param destinationNode The name of the destination node. - */ - public addEdge(sourceNode: string, destinationNode: string): void { - if (sourceNode === destinationNode) { - throw new Error('Edges that connect a node to itself are not allowed.') - } - - const neighbours = this.adjacencyList.get(sourceNode) ?? new Set() - neighbours.add(destinationNode) - this.adjacencyList.set(sourceNode, neighbours) - - // Create an entry for the destination node if it does not exist - // in the adjacency list. This is so that the set of keys of the - // adjacency list is the same as the set of nodes in the graph. - if (!this.adjacencyList.has(destinationNode)) { - this.adjacencyList.set(destinationNode, new Set()) - } - } - - /** - * Returns whether the directed edge from the source node to the - * destination node exists in the graph. - * - * @param sourceNode The name of the source node. - * @param destinationNode The name of the destination node. - */ - public hasEdge(sourceNode: string, destinationNode: string): boolean { - if (sourceNode === destinationNode) { - throw new Error('Edges that connect a node to itself are not allowed.') - } - - const neighbours = this.adjacencyList.get(sourceNode) ?? new Set() - return neighbours.has(destinationNode) - } - - /** - * Calculates the in-degree of every node in the directed graph. - * - * The in-degree of a node is the number of edges coming into - * the node. - */ - private calculateInDegrees(): Map { - const inDegrees = new Map() - for (const neighbours of this.adjacencyList.values()) { - for (const neighbour of neighbours) { - const inDegree = inDegrees.get(neighbour) ?? 0 - inDegrees.set(neighbour, inDegree + 1) - } - } - // Handle nodes which have an in-degree of 0. - for (const node of this.adjacencyList.keys()) { - if (!inDegrees.has(node)) { - inDegrees.set(node, 0) - } - } - return inDegrees - } - - /** - * Finds a cycle of nodes in the directed graph. This operates on the - * invariant that any nodes left over with a non-zero in-degree after - * Kahn's algorithm has been run is part of a cycle. - * - * @param inDegrees The number of edges coming into each node after - * running Kahn's algorithm. - */ - private findCycle(inDegrees: Map): string[] { - // First, we pick any arbitrary node that is part of a cycle as our - // starting node. - let startingNodeInCycle: string | null = null - for (const [node, inDegree] of inDegrees) { - if (inDegree !== 0) { - startingNodeInCycle = node - break - } - } - // By the invariant stated above, it is impossible that the starting - // node cannot be found. The lack of a starting node implies that - // all nodes have an in-degree of 0 after running Kahn's algorithm. - // This in turn implies that Kahn's algorithm was able to find a - // valid topological ordering & that the graph contains no cycles. - if (startingNodeInCycle === null) { - throw new Error('There are no cycles in this graph. This should never happen.') - } - - const cycle = [startingNodeInCycle] - // Then, we keep picking arbitrary nodes with non-zero in-degrees until - // we pick a node that has already been picked. - while (true) { - const currentNode = cycle[cycle.length - 1] - - const neighbours = this.adjacencyList.get(currentNode) - if (neighbours === undefined) { - throw this.differentKeysError - } - // By the invariant stated above, it is impossible that any node - // on the cycle has an in-degree of 0 after running Kahn's algorithm. - // An in-degree of 0 implies that the node is not part of a cycle, - // which is a contradiction since the current node was picked because - // it is part of a cycle. - if (neighbours.size === 0) { - throw new Error(`Node '${currentNode}' has no incoming edges. This should never happen.`) - } - - let nextNodeInCycle: string | null = null - for (const neighbour of neighbours) { - if (inDegrees.get(neighbour) !== 0) { - nextNodeInCycle = neighbour - break - } - } - // By the invariant stated above, if the current node is part of a cycle, - // then one of its neighbours must also be part of the same cycle. This - // is because a cycle contains at least 2 nodes. - if (nextNodeInCycle === null) { - throw new Error( - `None of the neighbours of node '${currentNode}' are part of the same cycle. This should never happen.` - ) - } - - // If the next node we pick is already part of the cycle, - // we drop all elements before the first instance of the - // next node and return the cycle. - const nextNodeIndex = cycle.indexOf(nextNodeInCycle) - const isNodeAlreadyInCycle = nextNodeIndex !== -1 - cycle.push(nextNodeInCycle) - if (isNodeAlreadyInCycle) { - return cycle.slice(nextNodeIndex) - } - } - } - - /** - * Returns a topological ordering of the nodes in the directed - * graph if the graph is acyclic. Otherwise, returns null. - * - * To get the topological ordering, Kahn's algorithm is used. - */ - public getTopologicalOrder(): TopologicalOrderResult { - let numOfVisitedNodes = 0 - const inDegrees = this.calculateInDegrees() - const topologicalOrder: string[] = [] - - const queue: string[] = [] - for (const [node, inDegree] of inDegrees) { - if (inDegree === 0) { - queue.push(node) - } - } - - while (true) { - const node = queue.shift() - // 'node' is 'undefined' when the queue is empty. - if (node === undefined) { - break - } - - numOfVisitedNodes++ - topologicalOrder.push(node) - - const neighbours = this.adjacencyList.get(node) - if (neighbours === undefined) { - throw this.differentKeysError - } - for (const neighbour of neighbours) { - const inDegree = inDegrees.get(neighbour) - if (inDegree === undefined) { - throw this.differentKeysError - } - inDegrees.set(neighbour, inDegree - 1) - - if (inDegrees.get(neighbour) === 0) { - queue.push(neighbour) - } - } - } - - // If not all nodes are visited, then at least one - // cycle exists in the graph and a topological ordering - // cannot be found. - if (numOfVisitedNodes !== this.adjacencyList.size) { - const firstCycleFound = this.findCycle(inDegrees) - return { - isValidTopologicalOrderFound: false, - topologicalOrder: null, - firstCycleFound - } - } - - return { - isValidTopologicalOrderFound: true, - topologicalOrder, - firstCycleFound: null - } - } -} diff --git a/src/localImports/filePaths.ts b/src/localImports/filePaths.ts deleted file mode 100644 index 50cd1c4f0..000000000 --- a/src/localImports/filePaths.ts +++ /dev/null @@ -1,107 +0,0 @@ -import { - ConsecutiveSlashesInFilePathError, - IllegalCharInFilePathError, - InvalidFilePathError -} from '../errors/localImportErrors' - -/** - * Maps non-alphanumeric characters that are legal in file paths - * to strings which are legal in function names. - */ -export const nonAlphanumericCharEncoding: Record = { - // While the underscore character is legal in both file paths - // and function names, it is the only character to be legal - // in both that is not an alphanumeric character. For simplicity, - // we handle it the same way as the other non-alphanumeric - // characters. - _: '_', - '/': '$', - // The following encodings work because we disallow file paths - // with consecutive slash characters (//). Note that when using - // the 'replace' or 'replaceAll' functions, the dollar sign ($) - // takes on a special meaning. As such, to insert a dollar sign, - // we need to write '$$'. See - // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replace#specifying_a_string_as_the_replacement - // for more information. - '.': '$$$$dot$$$$', // '$$dot$$' - '-': '$$$$dash$$$$' // '$$dash$$' -} - -/** - * Transforms the given file path to a valid function name. The - * characters in a valid function name must be either an - * alphanumeric character, the underscore (_), or the dollar ($). - * - * In addition, the returned function name has underscores appended - * on both ends to make it even less likely that the function name - * will collide with a user-inputted name. - * - * @param filePath The file path to transform. - */ -export const transformFilePathToValidFunctionName = (filePath: string): string => { - const encodeChars = Object.entries(nonAlphanumericCharEncoding).reduce( - ( - accumulatedFunction: (filePath: string) => string, - [charToReplace, replacementString]: [string, string] - ) => { - return (filePath: string): string => - accumulatedFunction(filePath).replaceAll(charToReplace, replacementString) - }, - (filePath: string): string => filePath - ) - return `__${encodeChars(filePath)}__` -} - -/** - * Transforms the given function name to the expected name that - * the variable holding the result of invoking the function should - * have. The main consideration of this transformation is that - * the resulting name should not conflict with any of the names - * that can be generated by `transformFilePathToValidFunctionName`. - * - * @param functionName The function name to transform. - */ -export const transformFunctionNameToInvokedFunctionResultVariableName = ( - functionName: string -): string => { - return `_${functionName}_` -} - -const isAlphanumeric = (char: string): boolean => { - return /[a-zA-Z0-9]/i.exec(char) !== null -} - -/** - * Validates the given file path, returning an `InvalidFilePathError` - * if the file path is invalid & `null` otherwise. A file path is - * valid if it only contains alphanumeric characters and the characters - * defined in `charEncoding`, and does not contain consecutive slash - * characters (//). - * - * @param filePath The file path to check. - */ -export const validateFilePath = (filePath: string): InvalidFilePathError | null => { - if (filePath.includes('//')) { - return new ConsecutiveSlashesInFilePathError(filePath) - } - for (const char of filePath) { - if (isAlphanumeric(char)) { - continue - } - if (char in nonAlphanumericCharEncoding) { - continue - } - return new IllegalCharInFilePathError(filePath) - } - return null -} - -/** - * Returns whether a string is a file path. We define a file - * path to be any string containing the '/' character. - * - * @param value The value of the string. - */ -export const isFilePath = (value: string): boolean => { - return value.includes('/') -} diff --git a/src/localImports/preprocessor.ts b/src/localImports/preprocessor.ts deleted file mode 100644 index 3c972b46a..000000000 --- a/src/localImports/preprocessor.ts +++ /dev/null @@ -1,374 +0,0 @@ -import es from 'estree' -import * as pathlib from 'path' - -import { CircularImportError } from '../errors/localImportErrors' -import { ModuleNotFoundError } from '../modules/errors' -import { - memoizedGetModuleDocsAsync, - memoizedGetModuleManifestAsync -} from '../modules/moduleLoaderAsync' -import { ModuleManifest } from '../modules/moduleTypes' -import { parse } from '../parser/parser' -import { AcornOptions } from '../parser/types' -import { Context } from '../types' -import assert from '../utils/assert' -import { isModuleDeclaration, isSourceImport } from '../utils/ast/typeGuards' -import { isIdentifier } from '../utils/rttc' -import { validateImportAndExports } from './analyzer' -import { createInvokedFunctionResultVariableDeclaration } from './constructors/contextSpecificConstructors' -import { DirectedGraph } from './directedGraph' -import { - transformFilePathToValidFunctionName, - transformFunctionNameToInvokedFunctionResultVariableName -} from './filePaths' -import hoistAndMergeImports from './transformers/hoistAndMergeImports' -import removeImportsAndExports from './transformers/removeImportsAndExports' -import { - createAccessImportStatements, - getInvokedFunctionResultVariableNameToImportSpecifiersMap, - transformProgramToFunctionDeclaration -} from './transformers/transformProgramToFunctionDeclaration' - -/** - * Error type to indicate that preprocessing has failed but that the context - * contains the underlying errors - */ -class PreprocessError extends Error {} - -type ModuleResolutionOptions = { - directory?: boolean - extensions: string[] | null -} - -const defaultResolutionOptions: Required = { - directory: false, - extensions: null -} - -export const parseProgramsAndConstructImportGraph = async ( - files: Partial>, - entrypointFilePath: string, - context: Context, - allowUndefinedImports: boolean, - rawResolutionOptions: Partial = {} -): Promise<{ - programs: Record - importGraph: DirectedGraph - moduleDocs: Record | null> -}> => { - const resolutionOptions = { - ...defaultResolutionOptions, - ...rawResolutionOptions - } - const programs: Record = {} - const importGraph = new DirectedGraph() - - // If there is more than one file, tag AST nodes with the source file path. - const numOfFiles = Object.keys(files).length - const shouldAddSourceFileToAST = numOfFiles > 1 - - // docs are only loaded if alloweUndefinedImports is false - // otherwise the entry for each module will be null - const moduleDocs: Record | null> = {} - - // If a Source import is never used, then there will be no need to - // load the module manifest - let moduleManifest: ModuleManifest | null = null - - // From the given import source, return the absolute path for that import - // If the import could not be located, then throw an error - async function resolveModule( - desiredPath: string, - node: Exclude - ) { - const source = node.source?.value - assert( - typeof source === 'string', - `${node.type} should have a source of type string, got ${source}` - ) - - let modAbsPath: string - if (isSourceImport(source)) { - if (!moduleManifest) { - moduleManifest = await memoizedGetModuleManifestAsync() - } - - if (source in moduleManifest) return source - modAbsPath = source - } else { - modAbsPath = pathlib.resolve(desiredPath, '..', source) - if (files[modAbsPath] !== undefined) return modAbsPath - - if (resolutionOptions.directory && files[`${modAbsPath}/index`] !== undefined) { - return `${modAbsPath}/index` - } - - if (resolutionOptions.extensions) { - for (const ext of resolutionOptions.extensions) { - if (files[`${modAbsPath}.${ext}`] !== undefined) return `${modAbsPath}.${ext}` - - if (resolutionOptions.directory && files[`${modAbsPath}/index.${ext}`] !== undefined) { - return `${modAbsPath}/index.${ext}` - } - } - } - } - - throw new ModuleNotFoundError(modAbsPath, node) - } - - const parseFile = async (currentFilePath: string) => { - if (isSourceImport(currentFilePath)) { - if (!(currentFilePath in moduleDocs)) { - // Will not throw ModuleNotFoundError - // If this were invalid, resolveModule would have thrown already - if (allowUndefinedImports) { - moduleDocs[currentFilePath] = null - } else { - const docs = await memoizedGetModuleDocsAsync(currentFilePath) - if (!docs) { - throw new Error(`Failed to load documentation for ${currentFilePath}`) - } - moduleDocs[currentFilePath] = new Set(Object.keys(docs)) - } - } - return - } - - if (currentFilePath in programs) return - - const code = files[currentFilePath] - assert( - code !== undefined, - "Module resolver should've thrown an error if the file path is not resolvable" - ) - - // Tag AST nodes with the source file path for use in error messages. - const parserOptions: Partial = shouldAddSourceFileToAST - ? { - sourceFile: currentFilePath - } - : {} - const program = parse(code, context, parserOptions, false) - if (!program) { - // Due to a bug in the typed parser where throwOnError isn't respected, - // we need to throw a quick exit error here instead - throw new PreprocessError() - } - - // assert(program !== null, 'Parser should throw on error and not just return null') - programs[currentFilePath] = program - - const dependencies = new Set() - for (const node of program.body) { - switch (node.type) { - case 'ExportNamedDeclaration': { - if (!node.source) continue - } - case 'ExportAllDeclaration': - case 'ImportDeclaration': { - const modAbsPath = await resolveModule(currentFilePath, node) - if (modAbsPath === currentFilePath) { - throw new CircularImportError([modAbsPath, currentFilePath]) - } - - dependencies.add(modAbsPath) - - // Replace the source of the node with the resolved path - node.source!.value = modAbsPath - break - } - } - } - - await Promise.all( - Array.from(dependencies.keys()).map(async dependency => { - await parseFile(dependency) - - // There is no need to track Source modules as dependencies, as it can be assumed - // that they will always have to be loaded first - if (!isSourceImport(dependency)) { - // If the edge has already been traversed before, the import graph - // must contain a cycle. Then we can exit early and proceed to find the cycle - if (importGraph.hasEdge(dependency, currentFilePath)) { - throw new PreprocessError() - } - - importGraph.addEdge(dependency, currentFilePath) - } - }) - ) - } - - try { - await parseFile(entrypointFilePath) - } catch (error) { - // console.log(error) - if (!(error instanceof PreprocessError)) { - context.errors.push(error) - } - } - - return { - programs, - importGraph, - moduleDocs - } -} - -export type PreprocessOptions = { - allowUndefinedImports?: boolean -} - -const defaultOptions: Required = { - allowUndefinedImports: false -} - -/** - * Preprocesses file imports and returns a transformed Abstract Syntax Tree (AST). - * If an error is encountered at any point, returns `undefined` to signify that an - * error occurred. Details of the error can be found inside `context.errors`. - * - * The preprocessing works by transforming each imported file into a function whose - * parameters are other files (results of transformed functions) and return value - * is a pair where the head is the default export or null, and the tail is a list - * of pairs that map from exported names to identifiers. - * - * See https://github.com/source-academy/js-slang/wiki/Local-Module-Import-&-Export - * for more information. - * - * @param files An object mapping absolute file paths to file content. - * @param entrypointFilePath The absolute path of the entrypoint file. - * @param context The information associated with the program evaluation. - */ -const preprocessFileImports = async ( - files: Partial>, - entrypointFilePath: string, - context: Context, - rawOptions: Partial = {} -): Promise => { - const { allowUndefinedImports } = { - ...defaultOptions, - ...rawOptions - } - - // Parse all files into ASTs and build the import graph. - const { programs, importGraph, moduleDocs } = await parseProgramsAndConstructImportGraph( - files, - entrypointFilePath, - context, - allowUndefinedImports - ) - - // Return 'undefined' if there are errors while parsing. - if (context.errors.length !== 0) { - return undefined - } - - // Check for circular imports. - const topologicalOrderResult = importGraph.getTopologicalOrder() - if (!topologicalOrderResult.isValidTopologicalOrderFound) { - context.errors.push(new CircularImportError(topologicalOrderResult.firstCycleFound)) - return undefined - } - - try { - validateImportAndExports( - moduleDocs, - programs, - topologicalOrderResult.topologicalOrder, - allowUndefinedImports - ) - } catch (error) { - context.errors.push(error) - return undefined - } - - // We want to operate on the entrypoint program to get the eventual - // preprocessed program. - const entrypointProgram = programs[entrypointFilePath] - const entrypointDirPath = pathlib.resolve(entrypointFilePath, '..') - - // Create variables to hold the imported statements. - const entrypointProgramModuleDeclarations = entrypointProgram.body.filter(isModuleDeclaration) - const entrypointProgramInvokedFunctionResultVariableNameToImportSpecifiersMap = - getInvokedFunctionResultVariableNameToImportSpecifiersMap( - entrypointProgramModuleDeclarations, - entrypointDirPath - ) - const entrypointProgramAccessImportStatements = createAccessImportStatements( - entrypointProgramInvokedFunctionResultVariableNameToImportSpecifiersMap - ) - - // Transform all programs into their equivalent function declaration - // except for the entrypoint program. - const functionDeclarations: Record = {} - for (const [filePath, program] of Object.entries(programs)) { - // The entrypoint program does not need to be transformed into its - // function declaration equivalent as its enclosing environment is - // simply the overall program's (constructed program's) environment. - if (filePath === entrypointFilePath) { - continue - } - - const functionDeclaration = transformProgramToFunctionDeclaration(program, filePath) - const functionName = functionDeclaration.id?.name - assert( - functionName !== undefined, - 'A transformed function declaration is missing its name. This should never happen.' - ) - - functionDeclarations[functionName] = functionDeclaration - } - - // Invoke each of the transformed functions and store the result in a variable. - const invokedFunctionResultVariableDeclarations: es.VariableDeclaration[] = [] - topologicalOrderResult.topologicalOrder.forEach((filePath: string): void => { - // As mentioned above, the entrypoint program does not have a function - // declaration equivalent, so there is no need to process it. - if (filePath === entrypointFilePath) { - return - } - - const functionName = transformFilePathToValidFunctionName(filePath) - const invokedFunctionResultVariableName = - transformFunctionNameToInvokedFunctionResultVariableName(functionName) - - const functionDeclaration = functionDeclarations[functionName] - const functionParams = functionDeclaration.params.filter(isIdentifier) - assert( - functionParams.length === functionDeclaration.params.length, - 'Function declaration contains non-Identifier AST nodes as params. This should never happen.' - ) - - const invokedFunctionResultVariableDeclaration = createInvokedFunctionResultVariableDeclaration( - functionName, - invokedFunctionResultVariableName, - functionParams - ) - invokedFunctionResultVariableDeclarations.push(invokedFunctionResultVariableDeclaration) - }) - - // Re-assemble the program. - const preprocessedProgram: es.Program = { - ...entrypointProgram, - body: [ - ...Object.values(functionDeclarations), - ...invokedFunctionResultVariableDeclarations, - ...entrypointProgramAccessImportStatements, - ...entrypointProgram.body - ] - } - // Import and Export related nodes are no longer necessary, so we can remove them from the program entirely - removeImportsAndExports(preprocessedProgram) - - // Finally, we need to hoist all remaining imports to the top of the - // program. These imports should be source module imports since - // non-Source module imports would have already been removed. As part - // of this step, we also merge imports from the same module so as to - // import each unique name per module only once. - hoistAndMergeImports(preprocessedProgram, Object.values(programs)) - return preprocessedProgram -} - -export default preprocessFileImports diff --git a/src/localImports/transformers/hoistAndMergeImports.ts b/src/localImports/transformers/hoistAndMergeImports.ts deleted file mode 100644 index 175490412..000000000 --- a/src/localImports/transformers/hoistAndMergeImports.ts +++ /dev/null @@ -1,87 +0,0 @@ -import es from 'estree' - -import { isImportDeclaration, isSourceImport } from '../../utils/ast/typeGuards' -import { - createIdentifier, - createImportDeclaration, - createImportDefaultSpecifier, - createImportSpecifier, - createLiteral -} from '../constructors/baseConstructors' - -/** - * Hoists import declarations to the top of the program & merges duplicate - * imports for the same module. - * - * Note that two modules are the same if and only if their import source - * is the same. This function does not resolve paths against a base - * directory. If such a functionality is required, this function will - * need to be modified. - * - * @param program The AST which should have its ImportDeclaration nodes - * hoisted & duplicate imports merged. - */ -export default function hoistAndMergeImports(program: es.Program, programs: es.Program[]) { - const allNodes = programs.flatMap(({ body }) => body) - const importNodes = allNodes.filter(isImportDeclaration) - const importsToSpecifiers = new Map>>() - - for (const node of importNodes) { - if (!node.source) continue - - const source = node.source!.value as string - // We no longer need imports from non-source modules, so we can just ignore them - if (!isSourceImport(source)) continue - - if (isImportDeclaration(node)) { - if (!importsToSpecifiers.has(source)) { - importsToSpecifiers.set(source, new Map()) - } - const specifierMap = importsToSpecifiers.get(source)! - node.specifiers.forEach(spec => { - let importingName: string - switch (spec.type) { - case 'ImportSpecifier': { - importingName = spec.imported.name - break - } - case 'ImportDefaultSpecifier': { - importingName = 'default' - break - } - case 'ImportNamespaceSpecifier': { - // TODO handle - throw new Error() - } - } - - if (!specifierMap.has(importingName)) { - specifierMap.set(importingName, new Set()) - } - specifierMap.get(importingName)!.add(spec.local.name) - }) - } - } - - // Every distinct source module being imported is given its own ImportDeclaration node - const importDeclarations = Array.from(importsToSpecifiers.entries()).map( - ([moduleName, imports]) => { - // Across different modules, the user may choose to alias some of the declarations, so we keep track, - // of all the different aliases used for each unique imported symbol - const specifiers = Array.from(imports.entries()).flatMap(([importedName, aliases]) => { - if (importedName === 'default') { - return Array.from(aliases).map(alias => - createImportDefaultSpecifier(createIdentifier(alias)) - ) as (es.ImportSpecifier | es.ImportDefaultSpecifier)[] - } else { - return Array.from(aliases).map(alias => - createImportSpecifier(createIdentifier(alias), createIdentifier(importedName)) - ) - } - }) - - return createImportDeclaration(specifiers, createLiteral(moduleName)) - } - ) - program.body = [...importDeclarations, ...program.body] -} diff --git a/src/localImports/transformers/removeImportsAndExports.ts b/src/localImports/transformers/removeImportsAndExports.ts deleted file mode 100644 index 8e1a11ca6..000000000 --- a/src/localImports/transformers/removeImportsAndExports.ts +++ /dev/null @@ -1,32 +0,0 @@ -import { Program, Statement } from 'estree' - -import assert from '../../utils/assert' -import { isDeclaration } from '../../utils/ast/typeGuards' - -export default function removeImportsAndExports(program: Program) { - const newBody = program.body.reduce((res, node) => { - switch (node.type) { - case 'ExportDefaultDeclaration': { - if (isDeclaration(node.declaration)) { - assert( - node.declaration.type !== 'VariableDeclaration', - 'ExportDefaultDeclarations should not have variable declarations' - ) - if (node.declaration.id) { - return [...res, node.declaration] - } - } - return res - } - case 'ExportNamedDeclaration': - return node.declaration ? [...res, node.declaration] : res - case 'ImportDeclaration': - case 'ExportAllDeclaration': - return res - default: - return [...res, node] - } - }, [] as Statement[]) - - program.body = newBody -} diff --git a/src/localImports/transformers/transformProgramToFunctionDeclaration.ts b/src/localImports/transformers/transformProgramToFunctionDeclaration.ts deleted file mode 100644 index e809575af..000000000 --- a/src/localImports/transformers/transformProgramToFunctionDeclaration.ts +++ /dev/null @@ -1,331 +0,0 @@ -import es from 'estree' -import * as path from 'path' - -import { defaultExportLookupName } from '../../stdlib/localImport.prelude' -import { - isDeclaration, - isDirective, - isModuleDeclaration, - isSourceImport, - isStatement -} from '../../utils/ast/typeGuards' -import { - createFunctionDeclaration, - createIdentifier, - createLiteral, - createReturnStatement -} from '../constructors/baseConstructors' -import { - createImportedNameDeclaration, - createListCallExpression, - createPairCallExpression -} from '../constructors/contextSpecificConstructors' -import { - transformFilePathToValidFunctionName, - transformFunctionNameToInvokedFunctionResultVariableName -} from '../filePaths' - -type ImportSpecifier = es.ImportSpecifier | es.ImportDefaultSpecifier | es.ImportNamespaceSpecifier - -export const getInvokedFunctionResultVariableNameToImportSpecifiersMap = ( - nodes: es.ModuleDeclaration[], - currentDirPath: string -): Record => { - const invokedFunctionResultVariableNameToImportSpecifierMap: Record = - {} - nodes.forEach((node: es.ModuleDeclaration): void => { - // Only ImportDeclaration nodes specify imported names. - if (node.type !== 'ImportDeclaration') { - return - } - const importSource = node.source.value - if (typeof importSource !== 'string') { - throw new Error( - 'Encountered an ImportDeclaration node with a non-string source. This should never occur.' - ) - } - // Only handle import declarations for non-Source modules. - if (isSourceImport(importSource)) { - return - } - // Different import sources can refer to the same file. For example, - // both './b.js' & '../dir/b.js' can refer to the same file if the - // current file path is '/dir/a.js'. To ensure that every file is - // processed only once, we resolve the import source against the - // current file path to get the absolute file path of the file to - // be imported. Since the absolute file path is guaranteed to be - // unique, it is also the canonical file path. - const importFilePath = path.resolve(currentDirPath, importSource) - // Even though we limit the chars that can appear in Source file - // paths, some chars in file paths (such as '/') cannot be used - // in function names. As such, we substitute illegal chars with - // legal ones in a manner that gives us a bijective mapping from - // file paths to function names. - const importFunctionName = transformFilePathToValidFunctionName(importFilePath) - // In the top-level environment of the resulting program, for every - // imported file, we will end up with two different names; one for - // the function declaration, and another for the variable holding - // the result of invoking the function. The former is represented - // by 'importFunctionName', while the latter is represented by - // 'invokedFunctionResultVariableName'. Since multiple files can - // import the same file, yet we only want the code in each file to - // be evaluated a single time (and share the same state), we need to - // evaluate the transformed functions (of imported files) only once - // in the top-level environment of the resulting program, then pass - // the result (the exported names) into other transformed functions. - // Having the two different names helps us to achieve this objective. - const invokedFunctionResultVariableName = - transformFunctionNameToInvokedFunctionResultVariableName(importFunctionName) - // If this is the file ImportDeclaration node for the canonical - // file path, instantiate the entry in the map. - if ( - invokedFunctionResultVariableNameToImportSpecifierMap[invokedFunctionResultVariableName] === - undefined - ) { - invokedFunctionResultVariableNameToImportSpecifierMap[invokedFunctionResultVariableName] = [] - } - invokedFunctionResultVariableNameToImportSpecifierMap[invokedFunctionResultVariableName].push( - ...node.specifiers - ) - }) - return invokedFunctionResultVariableNameToImportSpecifierMap -} - -const getIdentifier = (node: es.Declaration): es.Identifier | null => { - switch (node.type) { - case 'FunctionDeclaration': - if (node.id === null) { - throw new Error( - 'Encountered a FunctionDeclaration node without an identifier. This should have been caught when parsing.' - ) - } - return node.id - case 'VariableDeclaration': - const id = node.declarations[0].id - // In Source, variable names are Identifiers. - if (id.type !== 'Identifier') { - throw new Error(`Expected variable name to be an Identifier, but was ${id.type} instead.`) - } - return id - case 'ClassDeclaration': - throw new Error('Exporting of class is not supported.') - } -} - -const getExportedNameToIdentifierMap = ( - nodes: es.ModuleDeclaration[] -): Record => { - const exportedNameToIdentifierMap: Record = {} - nodes.forEach((node: es.ModuleDeclaration): void => { - // Only ExportNamedDeclaration nodes specify exported names. - if (node.type !== 'ExportNamedDeclaration') { - return - } - if (node.declaration) { - const identifier = getIdentifier(node.declaration) - if (identifier === null) { - return - } - // When an ExportNamedDeclaration node has a declaration, the - // identifier is the same as the exported name (i.e., no renaming). - const exportedName = identifier.name - exportedNameToIdentifierMap[exportedName] = identifier - } else { - // When an ExportNamedDeclaration node does not have a declaration, - // it contains a list of names to export, i.e., export { a, b as c, d };. - // Exported names can be renamed using the 'as' keyword. As such, the - // exported names and their corresponding identifiers might be different. - node.specifiers.forEach((node: es.ExportSpecifier): void => { - const exportedName = node.exported.name - const identifier = node.local - exportedNameToIdentifierMap[exportedName] = identifier - }) - } - }) - return exportedNameToIdentifierMap -} - -const getDefaultExportExpression = ( - nodes: es.ModuleDeclaration[], - exportedNameToIdentifierMap: Partial> -): es.Expression | null => { - let defaultExport: es.Expression | null = null - - // Handle default exports which are parsed as ExportNamedDeclaration AST nodes. - // 'export { name as default };' is equivalent to 'export default name;' but - // is represented by an ExportNamedDeclaration node instead of an - // ExportedDefaultDeclaration node. - // - // NOTE: If there is a named export representing the default export, its entry - // in the map must be removed to prevent it from being treated as a named export. - if (exportedNameToIdentifierMap['default'] !== undefined) { - defaultExport = exportedNameToIdentifierMap['default'] - delete exportedNameToIdentifierMap['default'] - } - - nodes.forEach((node: es.ModuleDeclaration): void => { - // Only ExportDefaultDeclaration nodes specify the default export. - if (node.type !== 'ExportDefaultDeclaration') { - return - } - if (defaultExport !== null) { - // This should never occur because multiple default exports should have - // been caught by the Acorn parser when parsing into an AST. - throw new Error('Encountered multiple default exports!') - } - if (isDeclaration(node.declaration)) { - const identifier = getIdentifier(node.declaration) - if (identifier === null) { - return - } - // When an ExportDefaultDeclaration node has a declaration, the - // identifier is the same as the exported name (i.e., no renaming). - defaultExport = identifier - } else { - // When an ExportDefaultDeclaration node does not have a declaration, - // it has an expression. - defaultExport = node.declaration - } - }) - return defaultExport -} - -export const createAccessImportStatements = ( - invokedFunctionResultVariableNameToImportSpecifiersMap: Record -): es.VariableDeclaration[] => { - const importDeclarations: es.VariableDeclaration[] = [] - for (const [invokedFunctionResultVariableName, importSpecifiers] of Object.entries( - invokedFunctionResultVariableNameToImportSpecifiersMap - )) { - importSpecifiers.forEach((importSpecifier: ImportSpecifier): void => { - let importDeclaration - switch (importSpecifier.type) { - case 'ImportSpecifier': - importDeclaration = createImportedNameDeclaration( - invokedFunctionResultVariableName, - importSpecifier.local, - importSpecifier.imported.name - ) - break - case 'ImportDefaultSpecifier': - importDeclaration = createImportedNameDeclaration( - invokedFunctionResultVariableName, - importSpecifier.local, - defaultExportLookupName - ) - break - case 'ImportNamespaceSpecifier': - // In order to support namespace imports, Source would need to first support objects. - throw new Error('Namespace imports are not supported.') - } - importDeclarations.push(importDeclaration) - }) - } - return importDeclarations -} - -const createReturnListArguments = ( - exportedNameToIdentifierMap: Record -): Array => { - return Object.entries(exportedNameToIdentifierMap).map( - ([exportedName, identifier]: [string, es.Identifier]): es.SimpleCallExpression => { - const head = createLiteral(exportedName) - const tail = identifier - return createPairCallExpression(head, tail) - } - ) -} - -const removeDirectives = ( - nodes: Array -): Array => { - return nodes.filter( - ( - node: es.Directive | es.Statement | es.ModuleDeclaration - ): node is es.Statement | es.ModuleDeclaration => !isDirective(node) - ) -} - -const removeModuleDeclarations = ( - nodes: Array -): es.Statement[] => { - const statements: es.Statement[] = [] - nodes.forEach((node: es.Statement | es.ModuleDeclaration): void => { - if (isStatement(node)) { - statements.push(node) - return - } - // If there are declaration nodes that are child nodes of the - // ModuleDeclaration nodes, we add them to the processed statements - // array so that the declarations are still part of the resulting - // program. - switch (node.type) { - case 'ImportDeclaration': - break - case 'ExportNamedDeclaration': - if (node.declaration) { - statements.push(node.declaration) - } - break - case 'ExportDefaultDeclaration': - if (isDeclaration(node.declaration)) { - statements.push(node.declaration) - } - break - case 'ExportAllDeclaration': - throw new Error('Not implemented yet.') - } - }) - return statements -} - -/** - * Transforms the given program into a function declaration. This is done - * so that every imported module has its own scope (since functions have - * their own scope). - * - * @param program The program to be transformed. - * @param currentFilePath The file path of the current program. - */ -export const transformProgramToFunctionDeclaration = ( - program: es.Program, - currentFilePath: string -): es.FunctionDeclaration => { - const moduleDeclarations = program.body.filter(isModuleDeclaration) - const currentDirPath = path.resolve(currentFilePath, '..') - - // Create variables to hold the imported statements. - const invokedFunctionResultVariableNameToImportSpecifiersMap = - getInvokedFunctionResultVariableNameToImportSpecifiersMap(moduleDeclarations, currentDirPath) - const accessImportStatements = createAccessImportStatements( - invokedFunctionResultVariableNameToImportSpecifiersMap - ) - - // Create the return value of all exports for the function. - const exportedNameToIdentifierMap = getExportedNameToIdentifierMap(moduleDeclarations) - const defaultExportExpression = getDefaultExportExpression( - moduleDeclarations, - exportedNameToIdentifierMap - ) - const defaultExport = defaultExportExpression ?? createLiteral(null) - const namedExports = createListCallExpression( - createReturnListArguments(exportedNameToIdentifierMap) - ) - const returnStatement = createReturnStatement( - createPairCallExpression(defaultExport, namedExports) - ) - - // Assemble the function body. - const programStatements = removeModuleDeclarations(removeDirectives(program.body)) - const functionBody = [...accessImportStatements, ...programStatements, returnStatement] - - // Determine the function name based on the absolute file path. - const functionName = transformFilePathToValidFunctionName(currentFilePath) - - // Set the equivalent variable names of imported modules as the function parameters. - const functionParams = Object.keys(invokedFunctionResultVariableNameToImportSpecifiersMap).map( - createIdentifier - ) - - return createFunctionDeclaration(functionName, functionParams, functionBody) -} diff --git a/src/modules/__tests__/moduleLoaderAsync.ts b/src/modules/__tests__/moduleLoaderAsync.ts new file mode 100644 index 000000000..be36a6c35 --- /dev/null +++ b/src/modules/__tests__/moduleLoaderAsync.ts @@ -0,0 +1,175 @@ +import type { MockedFunction } from 'jest-mock' +import { mockContext } from '../../mocks/context' +import { Chapter, Variant } from '../../types' +import { ModuleConnectionError, ModuleInternalError } from '../errors' +import { MODULES_STATIC_URL } from '../moduleLoader' +import type * as moduleLoaderType from '../moduleLoaderAsync' + +const moduleLoader: typeof moduleLoaderType = jest.requireActual('../moduleLoaderAsync') + +const mockedFetch = fetch as MockedFunction +function mockResponse(response: string, status: number = 200) { + mockedFetch.mockResolvedValueOnce({ + text: () => Promise.resolve(response), + json: () => Promise.resolve(JSON.parse(response)), + status + } as any) +} + +async function expectSuccess( + correctUrl: string, + expectedResp: T, + func: () => Promise, + callCount: number = 1 +) { + const response = await func() + + expect(fetch).toHaveBeenCalledTimes(callCount) + + const [calledUrl, callOpts] = mockedFetch.mock.calls[0] + expect(calledUrl).toEqual(correctUrl) + expect(callOpts).toMatchObject({ method: 'GET' }) + if (typeof expectedResp === 'string') { + expect(response).toEqual(expectedResp) + } else { + expect(response).toMatchObject(expectedResp) + } +} + +async function expectFailure(sampleUrl: string, expectedErr: any, func: () => Promise) { + await expect(() => func()).rejects.toBeInstanceOf(expectedErr) + + const [calledUrl, callOpts] = mockedFetch.mock.calls[0] + expect(calledUrl).toEqual(sampleUrl) + expect(callOpts).toMatchObject({ method: 'GET' }) +} + +beforeEach(() => { + jest.clearAllMocks() +}) + +describe('Test httpGetAsync', () => { + test('Http GET function httpGetAsync() works correctly', async () => { + const sampleResponse = `{ "repeat": { "contents": ["Repeat"] } }` + const sampleUrl = 'https://www.example.com' + + mockResponse(sampleResponse) + await expectSuccess(sampleUrl, sampleResponse, () => + moduleLoader.httpGetAsync(sampleUrl, 'text') + ) + }) + + test('Http GET function httpGetAsync() throws ModuleConnectionError', async () => { + const sampleUrl = 'https://www.example.com' + mockResponse('', 404) + + await expectFailure(sampleUrl, ModuleConnectionError, () => + moduleLoader.httpGetAsync(sampleUrl, 'text') + ) + }) + + test('Http GET modules manifest correctly', async () => { + const sampleResponse = `{ "repeat": { "contents": ["Repeat"] } }` + const correctUrl = MODULES_STATIC_URL + `/modules.json` + mockResponse(sampleResponse) + + await expectSuccess(correctUrl, JSON.parse(sampleResponse), () => + moduleLoader.memoizedGetModuleManifestAsync() + ) + }) + + test('Http GET returns objects when "json" is specified', async () => { + const sampleResponse = `{ "repeat": { "contents": ["Repeat"] } }` + const correctUrl = MODULES_STATIC_URL + `/modules.json` + mockResponse(sampleResponse) + const result = await moduleLoader.httpGetAsync(correctUrl, 'json') + expect(result).toMatchObject(JSON.parse(sampleResponse)) + }) +}) + +describe('Test bundle loading', () => { + const sampleModuleName = 'valid_module' + const sampleModuleUrl = MODULES_STATIC_URL + `/bundles/${sampleModuleName}.js` + // const sampleManifest = `{ "${sampleModuleName}": { "tabs": [] } }` + + // beforeEach(() => { + // mockResponse(sampleManifest) + // }) + + test('Http GET module bundle correctly', async () => { + const sampleResponse = `require => ({ foo: () => 'foo' })` + mockResponse(sampleResponse) + + const bundleText = await moduleLoader.memoizedGetModuleBundleAsync(sampleModuleName) + + expect(fetch).toHaveBeenCalledTimes(1) + + const [calledUrl, callOpts] = mockedFetch.mock.calls[0] + expect(calledUrl).toEqual(sampleModuleUrl) + expect(callOpts).toMatchObject({ method: 'GET' }) + expect(bundleText).toEqual(sampleResponse) + }) + + test('Loading a correctly implemented module bundle', async () => { + const context = mockContext(Chapter.SOURCE_4, Variant.DEFAULT) + const sampleResponse = `require => ({ foo: () => 'foo' })` + mockResponse(sampleResponse) + + const loadedModule = await moduleLoader.loadModuleBundleAsync(sampleModuleName, context, false) + + expect(loadedModule.foo()).toEqual('foo') + expect(fetch).toHaveBeenCalledTimes(1) + + const [calledUrl, callOpts] = mockedFetch.mock.calls[0] + expect(calledUrl).toEqual(sampleModuleUrl) + expect(callOpts).toMatchObject({ method: 'GET' }) + }) + + test('Loading a wrongly implemented module bundle throws ModuleInternalError', async () => { + const context = mockContext(Chapter.SOURCE_4, Variant.DEFAULT) + const wrongModuleText = `export function es6_function(params) {};` + mockResponse(wrongModuleText) + await expect(() => + moduleLoader.loadModuleBundleAsync(sampleModuleName, context, true) + ).rejects.toBeInstanceOf(ModuleInternalError) + + expect(fetch).toHaveBeenCalledTimes(1) + }) +}) + +describe('Test tab loading', () => { + const sampleTabUrl = `${MODULES_STATIC_URL}/tabs/Tab1.js` + const sampleManifest = `{ "one_module": { "tabs": ["Tab1", "Tab2"] } }` + + test('Http GET module tab correctly', async () => { + const sampleResponse = `require => ({ foo: () => 'foo' })` + mockResponse(sampleResponse) + + const bundleText = await moduleLoader.memoizedGetModuleTabAsync('Tab1') + + expect(fetch).toHaveBeenCalledTimes(1) + + const [calledUrl, callOpts] = mockedFetch.mock.calls[0] + expect(calledUrl).toEqual(sampleTabUrl) + expect(callOpts).toMatchObject({ method: 'GET' }) + expect(bundleText).toEqual(sampleResponse) + }) + + test('Loading a wrongly implemented tab throws ModuleInternalError', async () => { + mockResponse(sampleManifest) + + const wrongTabText = `export function es6_function(params) {};` + mockResponse(wrongTabText) + mockResponse(wrongTabText) + + await expect(() => moduleLoader.loadModuleTabsAsync('one_module')).rejects.toBeInstanceOf( + ModuleInternalError + ) + expect(fetch).toHaveBeenCalledTimes(3) + + const [[call0Url], [call1Url], [call2Url]] = mockedFetch.mock.calls + expect(call0Url).toEqual(`${MODULES_STATIC_URL}/modules.json`) + expect(call1Url).toEqual(`${MODULES_STATIC_URL}/tabs/Tab1.js`) + expect(call2Url).toEqual(`${MODULES_STATIC_URL}/tabs/Tab2.js`) + }) +}) diff --git a/src/modules/errors.ts b/src/modules/errors.ts index b220ed457..7a26d4795 100644 --- a/src/modules/errors.ts +++ b/src/modules/errors.ts @@ -1,13 +1,18 @@ import type { ExportAllDeclaration, + ExportDefaultDeclaration, + ExportNamedDeclaration, ExportSpecifier, ImportDefaultSpecifier, ImportNamespaceSpecifier, ImportSpecifier, - Node + Node, + SourceLocation } from 'estree' +import { UNKNOWN_LOCATION } from '../constants' import { RuntimeSourceError } from '../errors/runtimeSourceError' +import { ErrorSeverity, ErrorType, SourceError } from '../types' export class ModuleConnectionError extends RuntimeSourceError { private static message: string = `Unable to get modules.` @@ -109,3 +114,55 @@ export class UndefinedNamespaceImportError extends UndefinedImportErrorBase { return `'${this.moduleName}' does not export any symbols!` } } + +export class ReexportSymbolError implements SourceError { + public severity = ErrorSeverity.ERROR + public type = ErrorType.RUNTIME + public readonly location: SourceLocation + private readonly sourceString: string + + constructor( + public readonly modulePath: string, + public readonly symbol: string, + public readonly nodes: ( + | SourcedModuleDeclarations + | ExportNamedDeclaration + | ExportDefaultDeclaration + )[] + ) { + this.location = nodes[0].loc ?? UNKNOWN_LOCATION + this.sourceString = nodes + .map(({ loc }) => `(${loc!.start.line}:${loc!.start.column})`) + .join(', ') + } + + public explain(): string { + return `Multiple export definitions for the symbol '${this.symbol}' at (${this.sourceString})` + } + + public elaborate(): string { + return 'Check that you are not exporting the same symbol more than once' + } +} + +export class CircularImportError implements SourceError { + public type = ErrorType.TYPE + public severity = ErrorSeverity.ERROR + public location = UNKNOWN_LOCATION + + constructor(public filePathsInCycle: string[]) {} + + public explain() { + // We need to reverse the file paths in the cycle so that the + // semantics of "'/a.js' -> '/b.js'" is "'/a.js' imports '/b.js'". + const formattedCycle = this.filePathsInCycle + .map(filePath => `'${filePath}'`) + .reverse() + .join(' -> ') + return `Circular import detected: ${formattedCycle}.` + } + + public elaborate() { + return 'Break the circular import cycle by removing imports from any of the offending files.' + } +} \ No newline at end of file diff --git a/src/modules/moduleLoader.ts b/src/modules/moduleLoader.ts index 57cdea3c7..cb73acd48 100644 --- a/src/modules/moduleLoader.ts +++ b/src/modules/moduleLoader.ts @@ -146,7 +146,7 @@ export function loadModuleDocs(path: string, node?: es.Node) { const result = httpGet(`${MODULES_STATIC_URL}/jsons/${path}.json`) return JSON.parse(result) as ModuleDocumentation } catch (error) { - console.warn('Failed to load module documentation') + console.warn(`Failed to load documentation for ${path}:`, error) return null } } diff --git a/src/modules/moduleLoaderAsync.ts b/src/modules/moduleLoaderAsync.ts index 6b3602604..13bbd3078 100644 --- a/src/modules/moduleLoaderAsync.ts +++ b/src/modules/moduleLoaderAsync.ts @@ -1,21 +1,51 @@ -import { Node } from 'estree' -import { memoize } from 'lodash' +import type { Node } from 'estree' +import { memoize, MemoizedFunction } from 'lodash' import type { Context } from '..' import { wrapSourceModule } from '../utils/operators' import { ModuleConnectionError, ModuleInternalError, ModuleNotFoundError } from './errors' -import { httpGet, MODULES_STATIC_URL } from './moduleLoader' +import { MODULES_STATIC_URL } from './moduleLoader' import type { ModuleBundle, ModuleDocumentation, ModuleManifest } from './moduleTypes' import { getRequireProvider } from './requireProvider' -async function httpGetAsync(path: string) { - return new Promise((resolve, reject) => { - try { - resolve(httpGet(path)) - } catch (error) { - reject(error) - } +export function httpGetAsync(path: string, type: 'json'): Promise +export function httpGetAsync(path: string, type: 'text'): Promise +export async function httpGetAsync(path: string, type: 'json' | 'text') { + const resp = await fetch(path, { + method: 'GET' }) + + if (resp.status !== 200 && resp.status !== 304) { + throw new ModuleConnectionError() + } + + if (typeof window === 'undefined') { + return new Promise((resolve, reject) => { + const timer = setTimeout(() => { + reject(new Error('TIMEOUT')) + }, 10000) + + resp + .text() + .then(value => { + clearTimeout(timer) + resolve(value) + }) + .catch(reason => { + clearTimeout(timer) + reject(reason) + }) + }) + } + + return type === 'text' ? resp.text() : resp.json() + // return new Promise((resolve, reject) => { + // try { + // resolve(httpGet(path)) + // } catch (error) { + // reject(error) + // } + // }) } /** @@ -23,13 +53,8 @@ async function httpGetAsync(path: string) { * @return Modules */ export const memoizedGetModuleManifestAsync = memoize(getModuleManifestAsync) -async function getModuleManifestAsync(): Promise { - try { - const rawManifest = await httpGetAsync(`${MODULES_STATIC_URL}/modules.json`) - return JSON.parse(rawManifest) - } catch (error) { - throw new ModuleConnectionError(error) - } +function getModuleManifestAsync(): Promise { + return httpGetAsync(`${MODULES_STATIC_URL}/modules.json`, 'json') as Promise } async function checkModuleExists(moduleName: string, node?: Node) { @@ -41,27 +66,22 @@ async function checkModuleExists(moduleName: string, node?: Node) { } export const memoizedGetModuleBundleAsync = memoize(getModuleBundleAsync) -async function getModuleBundleAsync(moduleName: string, node?: Node): Promise { - await checkModuleExists(moduleName, node) - return httpGetAsync(`${MODULES_STATIC_URL}/bundles/${moduleName}.js`) +async function getModuleBundleAsync(moduleName: string): Promise { + return httpGetAsync(`${MODULES_STATIC_URL}/bundles/${moduleName}.js`, 'text') } export const memoizedGetModuleTabAsync = memoize(getModuleTabAsync) function getModuleTabAsync(tabName: string): Promise { - return httpGetAsync(`${MODULES_STATIC_URL}/tabs/${tabName}.js`) + return httpGetAsync(`${MODULES_STATIC_URL}/tabs/${tabName}.js`, 'text') } export const memoizedGetModuleDocsAsync = memoize(getModuleDocsAsync) -async function getModuleDocsAsync( - moduleName: string, - node?: Node -): Promise { +async function getModuleDocsAsync(moduleName: string): Promise { try { - await checkModuleExists(moduleName, node) - const rawDocs = await httpGetAsync(`${MODULES_STATIC_URL}/jsons/${moduleName}.json`) - return JSON.parse(rawDocs) + const result = await httpGetAsync(`${MODULES_STATIC_URL}/jsons/${moduleName}.json`, 'json') + return result as ModuleDocumentation } catch (error) { - console.warn(`Failed to load documentation for ${moduleName}`) + console.warn(`Failed to load documentation for ${moduleName}:`, error) return null } } @@ -89,7 +109,7 @@ export async function loadModuleBundleAsync( wrapModule: boolean, node?: Node ) { - await checkModuleExists(moduleName, node) + // await checkModuleExists(moduleName, node) const moduleText = await memoizedGetModuleBundleAsync(moduleName) try { const moduleBundle: ModuleBundle = eval(moduleText) @@ -101,3 +121,10 @@ export async function loadModuleBundleAsync( throw new ModuleInternalError(moduleName, error, node) } } + +export function resetMemoize() { + (memoizedGetModuleBundleAsync as MemoizedFunction).cache.clear!(); + (memoizedGetModuleManifestAsync as MemoizedFunction).cache.clear!(); + (memoizedGetModuleTabAsync as MemoizedFunction).cache.clear!(); + (memoizedGetModuleDocsAsync as MemoizedFunction).cache.clear!() +} \ No newline at end of file diff --git a/src/modules/moduleTypes.ts b/src/modules/moduleTypes.ts index 803e342c0..3121c3b40 100644 --- a/src/modules/moduleTypes.ts +++ b/src/modules/moduleTypes.ts @@ -1,21 +1,13 @@ import type { RequireProvider } from './requireProvider' -export type ModuleManifest = { - [module: string]: { - tabs: string[] - } -} - +export type ModuleManifest = Record export type ModuleBundle = (require: RequireProvider) => ModuleFunctions - -export type ModuleFunctions = { - [functionName: string]: Function -} - +export type ModuleFunctions = Record export type ModuleDocumentation = Record export type ImportTransformOptions = { loadTabs: boolean wrapModules: boolean + allowUndefinedImports: boolean // useThis: boolean; } diff --git a/src/modules/preprocessor/transformers/removeImportsAndExports.ts b/src/modules/preprocessor/transformers/removeImportsAndExports.ts index 7bb46c4a9..3b3b1a512 100644 --- a/src/modules/preprocessor/transformers/removeImportsAndExports.ts +++ b/src/modules/preprocessor/transformers/removeImportsAndExports.ts @@ -1,23 +1,16 @@ import { Program, Statement } from 'estree' -import assert from '../../../utils/assert' -import { isDeclaration } from '../../../utils/ast/typeGuards' +import { processExportDefaultDeclaration } from '../../../utils/ast/astUtils' export default function removeImportsAndExports(program: Program) { const newBody = program.body.reduce((res, node) => { switch (node.type) { - case 'ExportDefaultDeclaration': { - if (isDeclaration(node.declaration)) { - assert( - node.declaration.type !== 'VariableDeclaration', - 'ExportDefaultDeclarations should not have variable declarations' - ) - if (node.declaration.id) { - return [...res, node.declaration] - } - } - return res - } + case 'ExportDefaultDeclaration': + return processExportDefaultDeclaration(node, { + ClassDeclaration: decl => [...res, decl], + FunctionDeclaration: decl => [...res, decl], + Expression: () => res, + }) case 'ExportNamedDeclaration': return node.declaration ? [...res, node.declaration] : res case 'ImportDeclaration': From 86741900af9ce183d58e0a6831641c182c85c9a1 Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Wed, 10 May 2023 12:55:49 +0800 Subject: [PATCH 33/95] Relocate all errors related to imports --- src/errors/localImportErrors.ts | 117 -------------------------- src/modules/errors.ts | 37 ++++++++ src/modules/preprocessor/filePaths.ts | 2 +- 3 files changed, 38 insertions(+), 118 deletions(-) delete mode 100644 src/errors/localImportErrors.ts diff --git a/src/errors/localImportErrors.ts b/src/errors/localImportErrors.ts deleted file mode 100644 index d461d92b2..000000000 --- a/src/errors/localImportErrors.ts +++ /dev/null @@ -1,117 +0,0 @@ -import { - ExportSpecifier, - ImportDefaultSpecifier, - ImportNamespaceSpecifier, - ImportSpecifier, - ModuleDeclaration, - SourceLocation -} from 'estree' - -import { UNKNOWN_LOCATION } from '../constants' -import { nonAlphanumericCharEncoding } from '../localImports/filePaths' -import { ErrorSeverity, ErrorType, SourceError } from '../types' - -export abstract class InvalidFilePathError implements SourceError { - public type = ErrorType.TYPE - public severity = ErrorSeverity.ERROR - public location = UNKNOWN_LOCATION - - constructor(public filePath: string) {} - - abstract explain(): string - - abstract elaborate(): string -} - -export class IllegalCharInFilePathError extends InvalidFilePathError { - public explain() { - const validNonAlphanumericChars = Object.keys(nonAlphanumericCharEncoding) - .map(char => `'${char}'`) - .join(', ') - return `File path '${this.filePath}' must only contain alphanumeric chars and/or ${validNonAlphanumericChars}.` - } - - public elaborate() { - return 'Rename the offending file path to only use valid chars.' - } -} - -export class ConsecutiveSlashesInFilePathError extends InvalidFilePathError { - public explain() { - return `File path '${this.filePath}' cannot contain consecutive slashes '//'.` - } - - public elaborate() { - return 'Remove consecutive slashes from the offending file path.' - } -} - -export class CannotFindModuleError implements SourceError { - public type = ErrorType.TYPE - public severity = ErrorSeverity.ERROR - public location = UNKNOWN_LOCATION - - constructor(public moduleFilePath: string) {} - - public explain() { - return `Cannot find module '${this.moduleFilePath}'.` - } - - public elaborate() { - return 'Check that the module file path resolves to an existing file.' - } -} - -export class CircularImportError implements SourceError { - public type = ErrorType.TYPE - public severity = ErrorSeverity.ERROR - public location = UNKNOWN_LOCATION - - constructor(public filePathsInCycle: string[]) {} - - public explain() { - // We need to reverse the file paths in the cycle so that the - // semantics of "'/a.js' -> '/b.js'" is "'/a.js' imports '/b.js'". - const formattedCycle = this.filePathsInCycle - .map(filePath => `'${filePath}'`) - .reverse() - .join(' -> ') - return `Circular import detected: ${formattedCycle}.` - } - - public elaborate() { - return 'Break the circular import cycle by removing imports from any of the offending files.' - } -} - -export class ReexportSymbolError implements SourceError { - public severity = ErrorSeverity.ERROR - public type = ErrorType.RUNTIME - public readonly location: SourceLocation - private readonly sourceString: string - - constructor( - public readonly modulePath: string, - public readonly symbol: string, - public readonly nodes: ( - | ImportSpecifier - | ImportDefaultSpecifier - | ImportNamespaceSpecifier - | ExportSpecifier - | ModuleDeclaration - )[] - ) { - this.location = nodes[0].loc ?? UNKNOWN_LOCATION - this.sourceString = nodes - .map(({ loc }) => `(${loc!.start.line}:${loc!.start.column})`) - .join(', ') - } - - public explain(): string { - return `Multiple export definitions for the symbol '${this.symbol}' at (${this.sourceString})` - } - - public elaborate(): string { - return 'Check that you are not exporting the same symbol more than once' - } -} diff --git a/src/modules/errors.ts b/src/modules/errors.ts index 7a26d4795..2384926d1 100644 --- a/src/modules/errors.ts +++ b/src/modules/errors.ts @@ -13,6 +13,7 @@ import { UNKNOWN_LOCATION } from '../constants' import { RuntimeSourceError } from '../errors/runtimeSourceError' import { ErrorSeverity, ErrorType, SourceError } from '../types' +import { nonAlphanumericCharEncoding } from './preprocessor/filePaths' export class ModuleConnectionError extends RuntimeSourceError { private static message: string = `Unable to get modules.` @@ -105,6 +106,7 @@ export class UndefinedDefaultImportError extends UndefinedImportErrorBase { return `'${this.moduleName}' does not contain a default export!` } } + export class UndefinedNamespaceImportError extends UndefinedImportErrorBase { constructor(moduleName: string, node?: ImportNamespaceSpecifier | ExportAllDeclaration) { super(moduleName, node) @@ -165,4 +167,39 @@ export class CircularImportError implements SourceError { public elaborate() { return 'Break the circular import cycle by removing imports from any of the offending files.' } +} + +export abstract class InvalidFilePathError implements SourceError { + public type = ErrorType.TYPE + public severity = ErrorSeverity.ERROR + public location = UNKNOWN_LOCATION + + constructor(public filePath: string) {} + + abstract explain(): string + + abstract elaborate(): string +} + +export class IllegalCharInFilePathError extends InvalidFilePathError { + public explain() { + const validNonAlphanumericChars = Object.keys(nonAlphanumericCharEncoding) + .map(char => `'${char}'`) + .join(', ') + return `File path '${this.filePath}' must only contain alphanumeric chars and/or ${validNonAlphanumericChars}.` + } + + public elaborate() { + return 'Rename the offending file path to only use valid chars.' + } +} + +export class ConsecutiveSlashesInFilePathError extends InvalidFilePathError { + public explain() { + return `File path '${this.filePath}' cannot contain consecutive slashes '//'.` + } + + public elaborate() { + return 'Remove consecutive slashes from the offending file path.' + } } \ No newline at end of file diff --git a/src/modules/preprocessor/filePaths.ts b/src/modules/preprocessor/filePaths.ts index 3476cd4fe..f32d60fc7 100644 --- a/src/modules/preprocessor/filePaths.ts +++ b/src/modules/preprocessor/filePaths.ts @@ -2,7 +2,7 @@ import { ConsecutiveSlashesInFilePathError, IllegalCharInFilePathError, InvalidFilePathError -} from '../../errors/localImportErrors' +} from '../errors' /** * Maps non-alphanumeric characters that are legal in file paths From 260641cb59a680ea97feecf4366de1365f77ac3f Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Wed, 10 May 2023 12:57:04 +0800 Subject: [PATCH 34/95] Allow import options to be used in tests --- src/__tests__/environment.ts | 3 +- .../__snapshots__/allowed-syntax.ts.snap | 94 ------------------- src/parser/__tests__/allowed-syntax.ts | 12 ++- src/runner/fullJSRunner.ts | 1 + src/runner/sourceRunner.ts | 5 +- src/runner/utils.ts | 2 +- src/utils/testing.ts | 15 ++- 7 files changed, 30 insertions(+), 102 deletions(-) diff --git a/src/__tests__/environment.ts b/src/__tests__/environment.ts index a86a389d2..6bebbebd0 100644 --- a/src/__tests__/environment.ts +++ b/src/__tests__/environment.ts @@ -20,7 +20,8 @@ test('Function params and body identifiers are in different environment', () => const parsed = parse(code, context) const it = evaluate(parsed as any as Program, context, { loadTabs: false, - wrapModules: false + wrapModules: false, + allowUndefinedImports: true }) const stepsToComment = 13 // manually counted magic number for (let i = 0; i < stepsToComment; i += 1) { diff --git a/src/parser/__tests__/__snapshots__/allowed-syntax.ts.snap b/src/parser/__tests__/__snapshots__/allowed-syntax.ts.snap index 078b102f9..f6163b8b1 100644 --- a/src/parser/__tests__/__snapshots__/allowed-syntax.ts.snap +++ b/src/parser/__tests__/__snapshots__/allowed-syntax.ts.snap @@ -4451,100 +4451,6 @@ Object { } `; -exports[`Syntaxes are allowed in the chapter they are introduced 36: parse passes 2`] = ` -Object { - "alertResult": Array [], - "code": "parse(\\"export default function f(x) {\\\\n return x;\\\\n}\\\\nf(5);\\");", - "displayResult": Array [], - "numErrors": 0, - "parsedErrors": "", - "result": Array [ - "sequence", - Array [ - Array [ - Array [ - "export_default_declaration", - Array [ - Array [ - "function_declaration", - Array [ - Array [ - "name", - Array [ - "f", - null, - ], - ], - Array [ - Array [ - Array [ - "name", - Array [ - "x", - null, - ], - ], - null, - ], - Array [ - Array [ - "return_statement", - Array [ - Array [ - "name", - Array [ - "x", - null, - ], - ], - null, - ], - ], - null, - ], - ], - ], - ], - null, - ], - ], - Array [ - Array [ - "application", - Array [ - Array [ - "name", - Array [ - "f", - null, - ], - ], - Array [ - Array [ - Array [ - "literal", - Array [ - 5, - null, - ], - ], - null, - ], - null, - ], - ], - ], - null, - ], - ], - null, - ], - ], - "resultStatus": "finished", - "visualiseListResult": Array [], -} -`; - exports[`Syntaxes are allowed in the chapter they are introduced 36: passes 1`] = ` Object { "alertResult": Array [], diff --git a/src/parser/__tests__/allowed-syntax.ts b/src/parser/__tests__/allowed-syntax.ts index 1cbef93bd..736c2d8e2 100644 --- a/src/parser/__tests__/allowed-syntax.ts +++ b/src/parser/__tests__/allowed-syntax.ts @@ -322,8 +322,16 @@ test.each([ snippet = stripIndent(snippet) const parseSnippet = `parse(${JSON.stringify(snippet)});` const tests = [ - snapshotSuccess(snippet, { chapter, native: chapter !== Chapter.LIBRARY_PARSER }, 'passes'), - snapshotSuccess(parseSnippet, { chapter: Math.max(4, chapter), native: true }, 'parse passes') + snapshotSuccess( + snippet, + { chapter, native: chapter !== Chapter.LIBRARY_PARSER, allowUndefinedImports: true }, + 'passes' + ), + snapshotSuccess( + parseSnippet, + { chapter: Math.max(4, chapter), native: true, allowUndefinedImports: true }, + 'parse passes' + ) ] if (chapter > 1) { tests.push(snapshotFailure(snippet, { chapter: chapter - 1 }, 'fails a chapter below')) diff --git a/src/runner/fullJSRunner.ts b/src/runner/fullJSRunner.ts index 946894abd..d3b4742e0 100644 --- a/src/runner/fullJSRunner.ts +++ b/src/runner/fullJSRunner.ts @@ -72,6 +72,7 @@ export async function fullJSRunner( let sourceMapJson: RawSourceMap | undefined try { ;({ transpiled, sourceMapJson } = await transpile(program, context)) + if (options.logTranspilerOutput) console.log(transpiled) return { status: 'finished', context, diff --git a/src/runner/sourceRunner.ts b/src/runner/sourceRunner.ts index 319138db3..fa848f9c1 100644 --- a/src/runner/sourceRunner.ts +++ b/src/runner/sourceRunner.ts @@ -26,7 +26,7 @@ import { } from '../stepper/stepper' import { sandboxedEval } from '../transpiler/evalContainer' import { transpile } from '../transpiler/transpiler' -import { Context, Scheduler, SourceError, Variant } from '../types' +import { Chapter, Context, Scheduler, SourceError, Variant } from '../types' import { forceIt } from '../utils/operators' import { validateAndAnnotate } from '../validator/validator' import { compileForConcurrent } from '../vm/svml-compiler' @@ -57,7 +57,6 @@ const DEFAULT_SOURCE_OPTIONS: IOptions = { } } -// @ts-ignore let previousCode: { files: Partial> entrypointFilePath: string @@ -156,6 +155,8 @@ async function runNative( } ;({ transpiled, sourceMapJson } = await transpile(transpiledProgram, context)) + + console.log(transpiled) if (options.logTranspilerOutput) console.log(transpiled) let value = await sandboxedEval(transpiled, getRequireProvider(context), context.nativeStorage) diff --git a/src/runner/utils.ts b/src/runner/utils.ts index 9bb32125b..bad7b3fb7 100644 --- a/src/runner/utils.ts +++ b/src/runner/utils.ts @@ -5,7 +5,7 @@ import { IOptions, Result } from '..' import { parseAt } from '../parser/utils' import { areBreakpointsSet } from '../stdlib/inspector' import { Context, Variant } from '../types' -import { simple } from '../utils/walkers' +import { simple } from '../utils/ast/walkers' // Context Utils diff --git a/src/utils/testing.ts b/src/utils/testing.ts index 7defb037d..9fdc82b0e 100644 --- a/src/utils/testing.ts +++ b/src/utils/testing.ts @@ -48,6 +48,7 @@ interface TestOptions { native?: boolean showTranspiledCode?: boolean showErrorJSON?: boolean + allowUndefinedImports?: boolean } export function createTestContext({ @@ -116,7 +117,12 @@ async function testInContext(code: string, options: TestOptions): Promise Date: Wed, 10 May 2023 12:57:26 +0800 Subject: [PATCH 35/95] Fix infinite loop tests --- src/infiniteLoops/__tests__/runtime.ts | 48 ++++++-------------------- src/infiniteLoops/instrument.ts | 3 +- 2 files changed, 13 insertions(+), 38 deletions(-) diff --git a/src/infiniteLoops/__tests__/runtime.ts b/src/infiniteLoops/__tests__/runtime.ts index c618d08d8..1f9d9b3af 100644 --- a/src/infiniteLoops/__tests__/runtime.ts +++ b/src/infiniteLoops/__tests__/runtime.ts @@ -1,51 +1,17 @@ import * as es from 'estree' +import type { MockedFunction } from 'jest-mock' import { runInContext } from '../..' import createContext from '../../createContext' import { mockContext } from '../../mocks/context' -import * as moduleLoader from '../../modules/moduleLoaderAsync' import { parse } from '../../parser/parser' import { Chapter, Variant } from '../../types' -import { stripIndent } from '../../utils/formatters' import { getInfiniteLoopData, InfiniteLoopError, InfiniteLoopErrorType } from '../errors' import { testForInfiniteLoop } from '../runtime' -jest.mock('lodash', () => ({ - ...jest.requireActual('lodash'), - memoize: jest.fn(f => f) -})) +import * as moduleLoader from '../../modules/moduleLoaderAsync' -jest.spyOn(moduleLoader, 'memoizedGetModuleBundleAsync').mockImplementation(() => { - return Promise.resolve(stripIndent` - require => { - 'use strict'; - var exports = {}; - function repeat(func, n) { - return n === 0 ? function (x) { - return x; - } : function (x) { - return func(repeat(func, n - 1)(x)); - }; - } - function twice(func) { - return repeat(func, 2); - } - function thrice(func) { - return repeat(func, 3); - } - exports.repeat = repeat; - exports.thrice = thrice; - exports.twice = twice; - Object.defineProperty(exports, '__esModule', { - value: true - }); - return exports; - } - `) -}) -jest.spyOn(moduleLoader, 'memoizedGetModuleManifestAsync').mockResolvedValue({ - repeat: { tabs: [] } -}) +jest.spyOn(moduleLoader, 'memoizedGetModuleBundleAsync') test('works in runInContext when throwInfiniteLoops is true', async () => { const code = `function fib(x) { @@ -53,6 +19,7 @@ test('works in runInContext when throwInfiniteLoops is true', async () => { } fib(100000);` const context = mockContext(Chapter.SOURCE_4) + await runInContext(code, context, { throwInfiniteLoops: true }) const lastError = context.errors[context.errors.length - 1] expect(lastError instanceof InfiniteLoopError).toBe(true) @@ -307,6 +274,13 @@ test('cycle detection ignores non deterministic functions', async () => { }) test('handle imports properly', async () => { + const mockedBundleLoader = moduleLoader.memoizedGetModuleBundleAsync as MockedFunction< + typeof moduleLoader.memoizedGetModuleBundleAsync + > + mockedBundleLoader.mockResolvedValueOnce(`require => ({ + thrice: f => x => f(f(f(x))) + })`) + const code = `import {thrice} from "repeat"; function f(x) { return is_number(x) ? f(x) : 42; } display(f(thrice(x=>x+1)(0)));` diff --git a/src/infiniteLoops/instrument.ts b/src/infiniteLoops/instrument.ts index 4e923b5ec..e7ff6f0ee 100644 --- a/src/infiniteLoops/instrument.ts +++ b/src/infiniteLoops/instrument.ts @@ -583,7 +583,8 @@ async function handleImports(programs: es.Program[]): Promise<[string, string[]] new Set(), { loadTabs: false, - wrapModules: false + wrapModules: false, + allowUndefinedImports: true } ) From 11c9534c423aa1f3ea2f2cfd01658f7f59f3fae5 Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Wed, 10 May 2023 12:58:00 +0800 Subject: [PATCH 36/95] Update variable checker and its tests --- src/transpiler/__tests__/modules.ts | 6 +- src/transpiler/__tests__/variableChecker.ts | 32 +++++- src/transpiler/transpiler.ts | 14 ++- src/transpiler/variableChecker.ts | 109 +++++++++++--------- 4 files changed, 103 insertions(+), 58 deletions(-) diff --git a/src/transpiler/__tests__/modules.ts b/src/transpiler/__tests__/modules.ts index 0915ca755..8eeaa9420 100644 --- a/src/transpiler/__tests__/modules.ts +++ b/src/transpiler/__tests__/modules.ts @@ -22,7 +22,8 @@ test('Transform import declarations into variable declarations', async () => { const program = parse(code, context)! const [, importNodes] = await transformImportDeclarations(program, context, new Set(), { wrapModules: true, - loadTabs: false + loadTabs: false, + allowUndefinedImports: false }) expect(importNodes[0].type).toBe('VariableDeclaration') @@ -48,7 +49,8 @@ test('Transpiler accounts for user variable names when transforming import state new Set(['__MODULE__', '__MODULE__0']), { loadTabs: false, - wrapModules: false + wrapModules: false, + allowUndefinedImports: false } ) diff --git a/src/transpiler/__tests__/variableChecker.ts b/src/transpiler/__tests__/variableChecker.ts index f83c7c5cd..1236d3453 100644 --- a/src/transpiler/__tests__/variableChecker.ts +++ b/src/transpiler/__tests__/variableChecker.ts @@ -194,7 +194,8 @@ describe('Test export and import declarations', () => { testCases('Test ImportDeclarations', [ ['ImportSpecifiers are accounted for', 'import { hi } from "one_module"; hi;', null], - ['ImportDefaultSpecifiers are accounted for', 'import hi from "one_module"; hi;', null] + ['ImportDefaultSpecifiers are accounted for', 'import hi from "one_module"; hi;', null], + ['ImportNamespaceSpecifiers are accounted for', 'import * as hi from "one_module"; hi;', null] ]) }) @@ -264,6 +265,7 @@ testCases('Test BlockStatements', [ describe('Test For Statements', () => { testCases('Test regular for statements', [ ['Init statement properly declares variables', 'for (let i = 0; i < 5; i++) { i; }', null], + ['Works with expression bodies', 'for (let i = 0; i < 5; i++) i++;', null], [ 'Test expression is accounted for', 'for (let i = 0; unknown_var < 5; i++) { i; }', @@ -280,6 +282,34 @@ describe('Test For Statements', () => { { name: 'i', line: 1, col: 31 } ] ]) + + testCases('Test for of statements', [ + ['Init statement properly declares variables', 'for (const i of [1,2,3,4]) { i; }', null], + [ + 'Init statement works with patterns', + 'const obj = {}; for (obj.obj of [1,2,3,4]) { obj }', + null + ], + [ + 'Init is scoped to statement', + 'for (const x of [1,2,3,4]){} x;', + { name: 'x', line: 1, col: 29 } + ] + ]) + + testCases('Test for in statements', [ + ['Init statement properly declares variables', 'for (const i in [1,2,3,4]) { i; }', null], + [ + 'Init statement works with patterns', + 'const obj = {}; for (obj.obj in [1,2,3,4]) { obj }', + null + ], + [ + 'Init is scoped to statement', + 'for (const x in [1,2,3,4]){} x;', + { name: 'x', line: 1, col: 29 } + ] + ]) }) testCases('Test MemberExpressions', [ diff --git a/src/transpiler/transpiler.ts b/src/transpiler/transpiler.ts index 48e05def1..0d279bff7 100644 --- a/src/transpiler/transpiler.ts +++ b/src/transpiler/transpiler.ts @@ -59,7 +59,7 @@ export async function transformImportDeclarations( importNodes, context, loadTabs, - (name, node) => memoizedGetModuleBundleAsync(name, node), + name => memoizedGetModuleBundleAsync(name), { ImportSpecifier: (spec: es.ImportSpecifier, { namespaced }) => create.constantDeclaration( @@ -618,9 +618,11 @@ async function transpileToSource( usedIdentifiers, { loadTabs: true, - wrapModules: true + wrapModules: true, + allowUndefinedImports: false } ) + program.body = (importNodes as es.Program['body']).concat(otherNodes) getGloballyDeclaredIdentifiers(program).forEach(id => @@ -659,7 +661,10 @@ async function transpileToFullJS( const globalIds = getNativeIds(program, usedIdentifiers) Object.keys(globalIds).forEach(id => usedIdentifiers.add(id)) - if (!skipUndefined) checkForUndefinedVariables(program, usedIdentifiers) + if (!skipUndefined) { + const includingGlobals = new Set([...Object.keys(global), ...usedIdentifiers]) + checkForUndefinedVariables(program, includingGlobals) + } const [modulePrefix, importNodes, otherNodes] = await transformImportDeclarations( program, @@ -667,7 +672,8 @@ async function transpileToFullJS( usedIdentifiers, { loadTabs: true, - wrapModules: wrapSourceModules + wrapModules: wrapSourceModules, + allowUndefinedImports: true } ) diff --git a/src/transpiler/variableChecker.ts b/src/transpiler/variableChecker.ts index 89d41dac8..d80bf7261 100644 --- a/src/transpiler/variableChecker.ts +++ b/src/transpiler/variableChecker.ts @@ -2,7 +2,7 @@ import type * as es from 'estree' import { UndefinedVariable } from '../errors/errors' import assert from '../utils/assert' -import { extractIdsFromPattern } from '../utils/ast/astUtils' +import { extractIdsFromPattern, processExportDefaultDeclaration } from '../utils/ast/astUtils' import { isDeclaration, isFunctionNode, @@ -15,6 +15,11 @@ function isModuleOrRegDeclaration(node: es.Node): node is es.ModuleDeclaration | } function checkPattern(pattern: es.Pattern, identifiers: Set): void { + if (pattern.type === 'MemberExpression') { + checkExpression(pattern, identifiers) + return + } + extractIdsFromPattern(pattern).forEach(id => { if (!identifiers.has(id.name)) throw new UndefinedVariable(id.name, id) }) @@ -26,27 +31,27 @@ function checkPattern(pattern: es.Pattern, identifiers: Set): void { */ function checkFunction( input: es.ArrowFunctionExpression | es.FunctionDeclaration | es.FunctionExpression, - identifiers: Set + outerScope: Set ): void { // Add the names of the parameters for each function into the set // of identifiers that should be checked against - const newIdentifiers = new Set(identifiers) + const innerScope = new Set(outerScope) input.params.forEach(pattern => - extractIdsFromPattern(pattern).forEach(({ name }) => newIdentifiers.add(name)) + extractIdsFromPattern(pattern).forEach(({ name }) => innerScope.add(name)) ) if (input.body.type === 'BlockStatement') { - checkForUndefinedVariables(input.body, newIdentifiers) - } else checkExpression(input.body, newIdentifiers) + checkForUndefinedVariables(input.body, innerScope) + } else checkExpression(input.body, innerScope) } function checkExpression( node: es.Expression | es.RestElement | es.SpreadElement | es.Property, - identifiers: Set + scope: Set ): void { const checkMultiple = (items: (typeof node | null)[]) => items.forEach(item => { - if (item) checkExpression(item, identifiers) + if (item) checkExpression(item, scope) }) switch (node.type) { @@ -56,34 +61,34 @@ function checkExpression( } case 'ArrowFunctionExpression': case 'FunctionExpression': { - checkFunction(node, identifiers) + checkFunction(node, scope) break } case 'ClassExpression': { - checkClass(node, identifiers) + checkClass(node, scope) break } case 'AssignmentExpression': case 'BinaryExpression': case 'LogicalExpression': { - checkExpression(node.right, identifiers) + checkExpression(node.right, scope) if (isPattern(node.left)) { - checkPattern(node.left, identifiers) + checkPattern(node.left, scope) } else { - checkExpression(node.left, identifiers) + checkExpression(node.left, scope) } break } case 'MemberExpression': { // TODO handle super - checkExpression(node.object as es.Expression, identifiers) - if (node.computed) checkExpression(node.property as es.Expression, identifiers) + checkExpression(node.object as es.Expression, scope) + if (node.computed) checkExpression(node.property as es.Expression, scope) break } case 'CallExpression': case 'NewExpression': { // TODO handle super - checkExpression(node.callee as es.Expression, identifiers) + checkExpression(node.callee as es.Expression, scope) checkMultiple(node.arguments) break } @@ -92,13 +97,13 @@ function checkExpression( break } case 'Identifier': { - if (!identifiers.has(node.name)) { + if (!scope.has(node.name)) { throw new UndefinedVariable(node.name, node) } break } case 'ImportExpression': { - checkExpression(node.source, identifiers) + checkExpression(node.source, scope) break } case 'ObjectExpression': { @@ -106,16 +111,16 @@ function checkExpression( break } case 'Property': { - if (isPattern(node.value)) checkPattern(node.value, identifiers) - else checkExpression(node.value, identifiers) + if (isPattern(node.value)) checkPattern(node.value, scope) + else checkExpression(node.value, scope) - if (node.computed) checkExpression(node.key as es.Expression, identifiers) + if (node.computed) checkExpression(node.key as es.Expression, scope) break } case 'SpreadElement': case 'RestElement': { if (isPattern(node.argument)) { - checkPattern(node.argument, identifiers) + checkPattern(node.argument, scope) break } // Case falls through! @@ -124,12 +129,12 @@ function checkExpression( case 'UnaryExpression': case 'UpdateExpression': case 'YieldExpression': { - if (node.argument) checkExpression(node.argument as es.Expression, identifiers) + if (node.argument) checkExpression(node.argument as es.Expression, scope) break } case 'TaggedTemplateExpression': { - checkExpression(node.tag, identifiers) - checkExpression(node.quasi, identifiers) + checkExpression(node.tag, scope) + checkExpression(node.quasi, scope) break } case 'SequenceExpression': // Comma operator @@ -142,15 +147,15 @@ function checkExpression( /** * Check that a variable declaration is initialized with defined variables - * Returns false if there are undefined variables, returns the set of identifiers introduced by the + * Throws if there are undefined variables, returns the set of identifiers introduced by the * declaration otherwise */ function checkVariableDeclaration( - node: es.VariableDeclaration, - identifiers: Set + { declarations }: es.VariableDeclaration, + scope: Set ): Set { const output = new Set() - node.declarations.forEach(({ id, init }) => { + declarations.forEach(({ id, init }) => { if (init) { if (isFunctionNode(init)) { assert( @@ -159,17 +164,17 @@ function checkVariableDeclaration( ) // Add the name of the function to the set of identifiers so that // recursive calls are possible - const localIdentifiers = new Set([...identifiers, id.name]) + const localIdentifiers = new Set([...scope, id.name]) checkFunction(init, localIdentifiers) } else if (init.type === 'ClassExpression') { assert( id.type == 'Identifier', 'VariableDeclaration for class expressions should be Identifiers' ) - const localIdentifiers = new Set([...identifiers, id.name]) + const localIdentifiers = new Set([...scope, id.name]) checkClass(init, localIdentifiers) } else { - checkExpression(init, identifiers) + checkExpression(init, scope) } } extractIdsFromPattern(id).forEach(({ name }) => output.add(name)) @@ -177,8 +182,11 @@ function checkVariableDeclaration( return output } -function checkClass(node: es.ClassDeclaration | es.ClassExpression, localIdentifiers: Set) { - node.body.body.forEach(item => { +function checkClass( + { body: { body } }: es.ClassDeclaration | es.ClassExpression, + localIdentifiers: Set +) { + body.forEach(item => { if (item.type === 'StaticBlock') { checkForUndefinedVariables(item, localIdentifiers) return @@ -229,21 +237,15 @@ function checkDeclaration( case 'ImportDeclaration': case 'ExportAllDeclaration': return new Set() - case 'ExportDefaultDeclaration': { - if (isDeclaration(node.declaration)) { - assert( - node.declaration.type !== 'VariableDeclaration', - 'ExportDefaultDeclarations should not be associated with VariableDeclarations' - ) - - if (node.declaration.id) { - return checkDeclaration(node.declaration, identifiers) + case 'ExportDefaultDeclaration': + return processExportDefaultDeclaration(node, { + ClassDeclaration: decl => checkDeclaration(decl, identifiers), + FunctionDeclaration: decl => checkDeclaration(decl, identifiers), + Expression: expr => { + checkExpression(expr, identifiers) + return new Set() } - // TODO change declaration node type - } - checkExpression(node.declaration as es.Expression, identifiers) - return new Set() - } + }) case 'ExportNamedDeclaration': return !node.declaration ? new Set() : checkDeclaration(node.declaration, identifiers) } @@ -290,6 +292,8 @@ function checkStatement( if (node.left.type === 'VariableDeclaration') { const varDeclResult = checkVariableDeclaration(node.left, identifiers) varDeclResult.forEach(id => localIdentifiers.add(id)) + } else { + checkPattern(node.left, localIdentifiers) } checkExpression(node.right, localIdentifiers) checkBody(node.body, localIdentifiers) @@ -318,10 +322,12 @@ function checkStatement( checkBody(node.body, identifiers) break } - case 'ReturnStatement': - // TODO Check why a return statement has an non expression argument + case 'ReturnStatement': { + if (!node.argument) break + // Case falls through! + } case 'ThrowStatement': { - checkExpression(node.argument as es.Expression, identifiers) + checkExpression(node.argument!, identifiers) break } case 'TryStatement': { @@ -362,6 +368,7 @@ export default function checkForUndefinedVariables( stmt.specifiers.forEach(({ local: { name } }) => localIdentifiers.add(name)) break } + // NOTE: VariableDeclarations are not hoisted case 'ExportNamedDeclaration': case 'ExportDefaultDeclaration': { if (!stmt.declaration) break From 2ec2399dce264ab3231521c0153e1fd8bc6d66b0 Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Wed, 10 May 2023 12:58:43 +0800 Subject: [PATCH 37/95] Update error messages --- src/index.ts | 14 +++++++------- .../__snapshots__/interpreter-errors.ts.snap | 2 +- 2 files changed, 8 insertions(+), 8 deletions(-) diff --git a/src/index.ts b/src/index.ts index d6c7c75fd..800eed4eb 100644 --- a/src/index.ts +++ b/src/index.ts @@ -28,9 +28,6 @@ export { SourceDocumentation } from './editors/ace/docTooltip' import * as es from 'estree' import { ECEResultPromise, resumeEvaluate } from './ec-evaluator/interpreter' -import { CannotFindModuleError } from './errors/localImportErrors' -import { validateFilePath } from './localImports/filePaths' -import preprocessFileImports from './localImports/preprocessor' import { ImportTransformOptions } from './modules/moduleTypes' import { getKeywords, getProgramNames, NameDeclaration } from './name-extractor' import { parse } from './parser/parser' @@ -41,10 +38,13 @@ import { hasVerboseErrors, htmlRunner, resolvedErrorPromise, - sourceFilesRunner + sourceFilesRunner, } from './runner' import { typeCheck } from './typeChecker/typeChecker' import { typeToString } from './utils/stringify' +import { validateFilePath } from './modules/preprocessor/filePaths' +import preprocessFileImports from './modules/preprocessor' +import { ModuleNotFoundError } from './modules/errors' export interface IOptions { scheduler: 'preemptive' | 'async' @@ -336,12 +336,12 @@ export async function runFilesInContext( const code = files[entrypointFilePath] if (code === undefined) { - context.errors.push(new CannotFindModuleError(entrypointFilePath)) + context.errors.push(new ModuleNotFoundError(entrypointFilePath)) return resolvedErrorPromise } if ( - context.chapter === Chapter.FULL_JS || + // context.chapter === Chapter.FULL_JS || context.chapter === Chapter.FULL_TS || context.chapter === Chapter.PYTHON_1 ) { @@ -431,7 +431,7 @@ export async function compileFiles( const entrypointCode = files[entrypointFilePath] if (entrypointCode === undefined) { - context.errors.push(new CannotFindModuleError(entrypointFilePath)) + context.errors.push(new ModuleNotFoundError(entrypointFilePath)) return undefined } diff --git a/src/interpreter/__tests__/__snapshots__/interpreter-errors.ts.snap b/src/interpreter/__tests__/__snapshots__/interpreter-errors.ts.snap index ea8702594..f172a5554 100644 --- a/src/interpreter/__tests__/__snapshots__/interpreter-errors.ts.snap +++ b/src/interpreter/__tests__/__snapshots__/interpreter-errors.ts.snap @@ -855,7 +855,7 @@ Object { "code": "import { foo1 } from 'one_module';", "displayResult": Array [], "numErrors": 1, - "parsedErrors": "Line 1: Module \\"one_module\\" not found.", + "parsedErrors": "Line 1: 'one_module' does not contain a definition for 'foo1'", "result": undefined, "resultStatus": "error", "visualiseListResult": Array [], From f7eea1330258b9c50520cd02c5b03da3d2ac7b42 Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Wed, 10 May 2023 12:59:06 +0800 Subject: [PATCH 38/95] Add new convenience method for defaiult exports --- src/utils/ast/astUtils.ts | 45 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 44 insertions(+), 1 deletion(-) diff --git a/src/utils/ast/astUtils.ts b/src/utils/ast/astUtils.ts index bc9993ceb..009ad952a 100644 --- a/src/utils/ast/astUtils.ts +++ b/src/utils/ast/astUtils.ts @@ -1,4 +1,6 @@ -import type * as es from 'estree' +import * as es from 'estree' +import assert from '../assert' +import { isDeclaration } from './typeGuards' import { recursive } from './walkers' @@ -20,3 +22,44 @@ export function extractIdsFromPattern(pattern: es.Pattern): Set { }) return ids } + +type Processors = { + FunctionDeclaration: (node: es.FunctionDeclaration) => T + ClassDeclaration: (node: es.ClassDeclaration) => T + Expression: (node: es.Expression) => T +} + +export function processExportDefaultDeclaration( + node: es.ExportDefaultDeclaration, + processors: Processors +) { + if (isDeclaration(node.declaration)) { + const declaration = node.declaration + assert( + declaration.type !== 'VariableDeclaration', + 'ExportDefaultDeclarations cannot have VariableDeclarations' + ) + + if (declaration.type === 'FunctionDeclaration') { + if (declaration.id) { + return processors.FunctionDeclaration(declaration) + } + + return processors.Expression({ + ...declaration, + type: 'FunctionExpression' + }) + } + + if (declaration.id) { + return processors.ClassDeclaration(declaration) + } + + return processors.Expression({ + ...declaration, + type: 'ClassExpression' + }) + } + + return processors.Expression(node.declaration) +} From 9397c9092d01269f08c5e9d680db2882692e402e Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Wed, 10 May 2023 12:59:24 +0800 Subject: [PATCH 39/95] Fix SourceMapConsumer not working with tests --- jest.setup.ts | 11 ++++++++++- package.json | 4 +++- 2 files changed, 13 insertions(+), 2 deletions(-) diff --git a/jest.setup.ts b/jest.setup.ts index 584873dad..93ee8a29b 100644 --- a/jest.setup.ts +++ b/jest.setup.ts @@ -1,3 +1,5 @@ +import { SourceMapConsumer } from "source-map" + jest.mock('lodash', () => ({ ...jest.requireActual('lodash'), memoize: jest.fn((x: any) => x), @@ -5,4 +7,11 @@ jest.mock('lodash', () => ({ jest.mock('./src/modules/moduleLoaderAsync') -jest.mock('./src/modules/moduleLoader') \ No newline at end of file +jest.mock('./src/modules/moduleLoader') + +// @ts-ignore +SourceMapConsumer.initialize({ + 'lib/mappings.wasm': 'https://unpkg.com/source-map@0.7.3/lib/mappings.wasm' +}) + +global.fetch = jest.fn() \ No newline at end of file diff --git a/package.json b/package.json index 80556741c..98057c0b9 100644 --- a/package.json +++ b/package.json @@ -96,7 +96,9 @@ "ts", "js" ], - "setupFilesAfterEnv": ["/jest.setup.ts"], + "setupFilesAfterEnv": [ + "/jest.setup.ts" + ], "transform": { "\\.ts$": "ts-jest", "\\.js$": "babel-jest" From 831e457e21d0c1b10e9717dcb5cd5949729063e8 Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Wed, 10 May 2023 17:03:36 +0800 Subject: [PATCH 40/95] Fix babel not working with jest --- .babelrc | 2 +- .gitignore | 1 + package.json | 1 + yarn.lock | 513 ++++++++++++++++++++++++++++++++++++++++++++++++++- 4 files changed, 513 insertions(+), 4 deletions(-) diff --git a/.babelrc b/.babelrc index 05581748b..1320b9a32 100644 --- a/.babelrc +++ b/.babelrc @@ -1,3 +1,3 @@ { - "presets": ["es2015", "stage-2"] + "presets": ["@babel/preset-env"] } diff --git a/.gitignore b/.gitignore index 7bb67a701..38326087d 100644 --- a/.gitignore +++ b/.gitignore @@ -14,3 +14,4 @@ coverage/ .vscode/ tsconfig.tsbuildinfo test-report.html +yarn-error.log diff --git a/package.json b/package.json index 98057c0b9..18f2f4089 100644 --- a/package.json +++ b/package.json @@ -64,6 +64,7 @@ "prepare": "husky install" }, "devDependencies": { + "@babel/preset-env": "^7.21.5", "@types/jest": "^29.0.0", "@types/lodash.assignin": "^4.2.6", "@types/lodash.clonedeep": "^4.5.6", diff --git a/yarn.lock b/yarn.lock index e2885bfe5..702ebbd02 100644 --- a/yarn.lock +++ b/yarn.lock @@ -24,11 +24,23 @@ dependencies: "@babel/highlight" "^7.18.6" +"@babel/code-frame@^7.21.4": + version "7.21.4" + resolved "https://registry.yarnpkg.com/@babel/code-frame/-/code-frame-7.21.4.tgz#d0fa9e4413aca81f2b23b9442797bda1826edb39" + integrity sha512-LYvhNKfwWSPpocw8GI7gpK2nq3HSDuEPC/uSYaALSJu9xjsalaaYFOq0Pwt5KmVqwEbZlDu81aLXwBOmD/Fv9g== + dependencies: + "@babel/highlight" "^7.18.6" + "@babel/compat-data@^7.17.7", "@babel/compat-data@^7.18.8", "@babel/compat-data@^7.19.1", "@babel/compat-data@^7.19.3": version "7.19.3" resolved "https://registry.npmjs.org/@babel/compat-data/-/compat-data-7.19.3.tgz" integrity sha512-prBHMK4JYYK+wDjJF1q99KK4JLL+egWS4nmNqdlMUgCExMZ+iZW0hGhyC3VEbsPjvaN0TBhW//VIFwBrk8sEiw== +"@babel/compat-data@^7.20.5", "@babel/compat-data@^7.21.5": + version "7.21.7" + resolved "https://registry.yarnpkg.com/@babel/compat-data/-/compat-data-7.21.7.tgz#61caffb60776e49a57ba61a88f02bedd8714f6bc" + integrity sha512-KYMqFYTaenzMK4yUtf4EW9wc4N9ef80FsbMtkwool5zpwl4YrT1SdWYSTRcT94KO4hannogdS+LxY7L+arP3gA== + "@babel/core@^7.11.6", "@babel/core@^7.12.3", "@babel/core@^7.9.0": version "7.19.3" resolved "https://registry.npmjs.org/@babel/core/-/core-7.19.3.tgz" @@ -59,6 +71,16 @@ "@jridgewell/gen-mapping" "^0.3.2" jsesc "^2.5.1" +"@babel/generator@^7.21.5": + version "7.21.5" + resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.21.5.tgz#c0c0e5449504c7b7de8236d99338c3e2a340745f" + integrity sha512-SrKK/sRv8GesIW1bDagf9cCG38IOMYZusoe1dfg0D8aiUe3Amvoj1QtjTPAWcfrZFvIwlleLb0gxzQidL9w14w== + dependencies: + "@babel/types" "^7.21.5" + "@jridgewell/gen-mapping" "^0.3.2" + "@jridgewell/trace-mapping" "^0.3.17" + jsesc "^2.5.1" + "@babel/helper-annotate-as-pure@^7.18.6": version "7.18.6" resolved "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.18.6.tgz" @@ -84,6 +106,17 @@ browserslist "^4.21.3" semver "^6.3.0" +"@babel/helper-compilation-targets@^7.20.7", "@babel/helper-compilation-targets@^7.21.5": + version "7.21.5" + resolved "https://registry.yarnpkg.com/@babel/helper-compilation-targets/-/helper-compilation-targets-7.21.5.tgz#631e6cc784c7b660417421349aac304c94115366" + integrity sha512-1RkbFGUKex4lvsB9yhIfWltJM5cZKUftB2eNajaDv3dCMEp49iBG0K14uH8NnX9IPux2+mK7JGEOB0jn48/J6w== + dependencies: + "@babel/compat-data" "^7.21.5" + "@babel/helper-validator-option" "^7.21.0" + browserslist "^4.21.3" + lru-cache "^5.1.1" + semver "^6.3.0" + "@babel/helper-create-class-features-plugin@^7.18.6", "@babel/helper-create-class-features-plugin@^7.19.0": version "7.19.0" resolved "https://registry.npmjs.org/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.19.0.tgz" @@ -97,6 +130,21 @@ "@babel/helper-replace-supers" "^7.18.9" "@babel/helper-split-export-declaration" "^7.18.6" +"@babel/helper-create-class-features-plugin@^7.21.0": + version "7.21.8" + resolved "https://registry.yarnpkg.com/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.21.8.tgz#205b26330258625ef8869672ebca1e0dee5a0f02" + integrity sha512-+THiN8MqiH2AczyuZrnrKL6cAxFRRQDKW9h1YkBvbgKmAm6mwiacig1qT73DHIWMGo40GRnsEfN3LA+E6NtmSw== + dependencies: + "@babel/helper-annotate-as-pure" "^7.18.6" + "@babel/helper-environment-visitor" "^7.21.5" + "@babel/helper-function-name" "^7.21.0" + "@babel/helper-member-expression-to-functions" "^7.21.5" + "@babel/helper-optimise-call-expression" "^7.18.6" + "@babel/helper-replace-supers" "^7.21.5" + "@babel/helper-skip-transparent-expression-wrappers" "^7.20.0" + "@babel/helper-split-export-declaration" "^7.18.6" + semver "^6.3.0" + "@babel/helper-create-regexp-features-plugin@^7.18.6", "@babel/helper-create-regexp-features-plugin@^7.19.0": version "7.19.0" resolved "https://registry.npmjs.org/@babel/helper-create-regexp-features-plugin/-/helper-create-regexp-features-plugin-7.19.0.tgz" @@ -105,6 +153,15 @@ "@babel/helper-annotate-as-pure" "^7.18.6" regexpu-core "^5.1.0" +"@babel/helper-create-regexp-features-plugin@^7.20.5": + version "7.21.8" + resolved "https://registry.yarnpkg.com/@babel/helper-create-regexp-features-plugin/-/helper-create-regexp-features-plugin-7.21.8.tgz#a7886f61c2e29e21fd4aaeaf1e473deba6b571dc" + integrity sha512-zGuSdedkFtsFHGbexAvNuipg1hbtitDLo2XE8/uf6Y9sOQV1xsYX/2pNbtedp/X0eU1pIt+kGvaqHCowkRbS5g== + dependencies: + "@babel/helper-annotate-as-pure" "^7.18.6" + regexpu-core "^5.3.1" + semver "^6.3.0" + "@babel/helper-define-polyfill-provider@^0.3.3": version "0.3.3" resolved "https://registry.npmjs.org/@babel/helper-define-polyfill-provider/-/helper-define-polyfill-provider-0.3.3.tgz" @@ -122,6 +179,11 @@ resolved "https://registry.npmjs.org/@babel/helper-environment-visitor/-/helper-environment-visitor-7.18.9.tgz" integrity sha512-3r/aACDJ3fhQ/EVgFy0hpj8oHyHpQc+LPtJoY9SzTThAsStm4Ptegq92vqKoE3vD706ZVFWITnMnxucw+S9Ipg== +"@babel/helper-environment-visitor@^7.21.5": + version "7.21.5" + resolved "https://registry.yarnpkg.com/@babel/helper-environment-visitor/-/helper-environment-visitor-7.21.5.tgz#c769afefd41d171836f7cb63e295bedf689d48ba" + integrity sha512-IYl4gZ3ETsWocUWgsFZLM5i1BYx9SoemminVEXadgLBa9TdeorzgLKm8wWLA6J1N/kT3Kch8XIk1laNzYoHKvQ== + "@babel/helper-explode-assignable-expression@^7.18.6": version "7.18.6" resolved "https://registry.npmjs.org/@babel/helper-explode-assignable-expression/-/helper-explode-assignable-expression-7.18.6.tgz" @@ -137,6 +199,14 @@ "@babel/template" "^7.18.10" "@babel/types" "^7.19.0" +"@babel/helper-function-name@^7.21.0": + version "7.21.0" + resolved "https://registry.yarnpkg.com/@babel/helper-function-name/-/helper-function-name-7.21.0.tgz#d552829b10ea9f120969304023cd0645fa00b1b4" + integrity sha512-HfK1aMRanKHpxemaY2gqBmL04iAPOPRj7DxtNbiDOrJK+gdwkiNRVpCpUJYbUT+aZyemKN8brqTOxzCaG6ExRg== + dependencies: + "@babel/template" "^7.20.7" + "@babel/types" "^7.21.0" + "@babel/helper-hoist-variables@^7.18.6": version "7.18.6" resolved "https://registry.npmjs.org/@babel/helper-hoist-variables/-/helper-hoist-variables-7.18.6.tgz" @@ -151,6 +221,13 @@ dependencies: "@babel/types" "^7.18.9" +"@babel/helper-member-expression-to-functions@^7.21.5": + version "7.21.5" + resolved "https://registry.yarnpkg.com/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.21.5.tgz#3b1a009af932e586af77c1030fba9ee0bde396c0" + integrity sha512-nIcGfgwpH2u4n9GG1HpStW5Ogx7x7ekiFHbjjFRKXbn5zUvqO9ZgotCO4x1aNbKn/x/xOUaXEhyNHCwtFCpxWg== + dependencies: + "@babel/types" "^7.21.5" + "@babel/helper-module-imports@^7.18.6": version "7.18.6" resolved "https://registry.npmjs.org/@babel/helper-module-imports/-/helper-module-imports-7.18.6.tgz" @@ -158,6 +235,13 @@ dependencies: "@babel/types" "^7.18.6" +"@babel/helper-module-imports@^7.21.4": + version "7.21.4" + resolved "https://registry.yarnpkg.com/@babel/helper-module-imports/-/helper-module-imports-7.21.4.tgz#ac88b2f76093637489e718a90cec6cf8a9b029af" + integrity sha512-orajc5T2PsRYUN3ZryCEFeMDYwyw09c/pZeaQEZPH0MpKzSvn3e0uXsDBu3k03VI+9DBiRo+l22BfKTpKwa/Wg== + dependencies: + "@babel/types" "^7.21.4" + "@babel/helper-module-transforms@^7.18.6", "@babel/helper-module-transforms@^7.19.0": version "7.19.0" resolved "https://registry.npmjs.org/@babel/helper-module-transforms/-/helper-module-transforms-7.19.0.tgz" @@ -172,6 +256,20 @@ "@babel/traverse" "^7.19.0" "@babel/types" "^7.19.0" +"@babel/helper-module-transforms@^7.20.11", "@babel/helper-module-transforms@^7.21.5": + version "7.21.5" + resolved "https://registry.yarnpkg.com/@babel/helper-module-transforms/-/helper-module-transforms-7.21.5.tgz#d937c82e9af68d31ab49039136a222b17ac0b420" + integrity sha512-bI2Z9zBGY2q5yMHoBvJ2a9iX3ZOAzJPm7Q8Yz6YeoUjU/Cvhmi2G4QyTNyPBqqXSgTjUxRg3L0xV45HvkNWWBw== + dependencies: + "@babel/helper-environment-visitor" "^7.21.5" + "@babel/helper-module-imports" "^7.21.4" + "@babel/helper-simple-access" "^7.21.5" + "@babel/helper-split-export-declaration" "^7.18.6" + "@babel/helper-validator-identifier" "^7.19.1" + "@babel/template" "^7.20.7" + "@babel/traverse" "^7.21.5" + "@babel/types" "^7.21.5" + "@babel/helper-optimise-call-expression@^7.18.6": version "7.18.6" resolved "https://registry.npmjs.org/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.18.6.tgz" @@ -184,6 +282,11 @@ resolved "https://registry.npmjs.org/@babel/helper-plugin-utils/-/helper-plugin-utils-7.19.0.tgz" integrity sha512-40Ryx7I8mT+0gaNxm8JGTZFUITNqdLAgdg0hXzeVZxVD6nFsdhQvip6v8dqkRHzsz1VFpFAaOCHNn0vKBL7Czw== +"@babel/helper-plugin-utils@^7.20.2", "@babel/helper-plugin-utils@^7.21.5": + version "7.21.5" + resolved "https://registry.yarnpkg.com/@babel/helper-plugin-utils/-/helper-plugin-utils-7.21.5.tgz#345f2377d05a720a4e5ecfa39cbf4474a4daed56" + integrity 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+"@babel/plugin-proposal-class-static-block@^7.21.0": + version "7.21.0" + resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-class-static-block/-/plugin-proposal-class-static-block-7.21.0.tgz#77bdd66fb7b605f3a61302d224bdfacf5547977d" + integrity sha512-XP5G9MWNUskFuP30IfFSEFB0Z6HzLIUcjYM4bYOPHXl7eiJ9HFv8tWj6TXTN5QODiEhDZAeI4hLok2iHFFV4hw== + dependencies: + "@babel/helper-create-class-features-plugin" "^7.21.0" + "@babel/helper-plugin-utils" "^7.20.2" + "@babel/plugin-syntax-class-static-block" "^7.14.5" + "@babel/plugin-proposal-dynamic-import@^7.18.6": version "7.18.6" resolved "https://registry.npmjs.org/@babel/plugin-proposal-dynamic-import/-/plugin-proposal-dynamic-import-7.18.6.tgz" @@ -354,6 +526,14 @@ "@babel/helper-plugin-utils" "^7.18.9" "@babel/plugin-syntax-logical-assignment-operators" "^7.10.4" +"@babel/plugin-proposal-logical-assignment-operators@^7.20.7": + version "7.20.7" + resolved 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+"@babel/plugin-transform-computed-properties@^7.21.5": + version "7.21.5" + resolved "https://registry.yarnpkg.com/@babel/plugin-transform-computed-properties/-/plugin-transform-computed-properties-7.21.5.tgz#3a2d8bb771cd2ef1cd736435f6552fe502e11b44" + integrity sha512-TR653Ki3pAwxBxUe8srfF3e4Pe3FTA46uaNHYyQwIoM4oWKSoOZiDNyHJ0oIoDIUPSRQbQG7jzgVBX3FPVne1Q== + dependencies: + "@babel/helper-plugin-utils" "^7.21.5" + "@babel/template" "^7.20.7" + "@babel/plugin-transform-destructuring@^7.18.13": version "7.18.13" resolved "https://registry.npmjs.org/@babel/plugin-transform-destructuring/-/plugin-transform-destructuring-7.18.13.tgz" @@ -616,6 +879,13 @@ dependencies: "@babel/helper-plugin-utils" "^7.18.9" +"@babel/plugin-transform-destructuring@^7.21.3": + version "7.21.3" + resolved "https://registry.yarnpkg.com/@babel/plugin-transform-destructuring/-/plugin-transform-destructuring-7.21.3.tgz#73b46d0fd11cd6ef57dea8a381b1215f4959d401" + integrity 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unicode-match-property-value-ecmascript "^2.0.0" +regexpu-core@^5.3.1: + version "5.3.2" + resolved "https://registry.yarnpkg.com/regexpu-core/-/regexpu-core-5.3.2.tgz#11a2b06884f3527aec3e93dbbf4a3b958a95546b" + integrity sha512-RAM5FlZz+Lhmo7db9L298p2vHP5ZywrVXmVXpmAD9GuL5MPH6t9ROw1iA/wfHkQ76Qe7AaPF0nGuim96/IrQMQ== + dependencies: + "@babel/regjsgen" "^0.8.0" + regenerate "^1.4.2" + regenerate-unicode-properties "^10.1.0" + regjsparser "^0.9.1" + unicode-match-property-ecmascript "^2.0.0" + unicode-match-property-value-ecmascript "^2.1.0" + regjsgen@^0.7.1: version "0.7.1" resolved "https://registry.npmjs.org/regjsgen/-/regjsgen-0.7.1.tgz" @@ -5069,6 +5566,11 @@ unicode-match-property-value-ecmascript@^2.0.0: resolved "https://registry.npmjs.org/unicode-match-property-value-ecmascript/-/unicode-match-property-value-ecmascript-2.0.0.tgz" integrity sha512-7Yhkc0Ye+t4PNYzOGKedDhXbYIBe1XEQYQxOPyhcXNMJ0WCABqqj6ckydd6pWRZTHV4GuCPKdBAUiMc60tsKVw== +unicode-match-property-value-ecmascript@^2.1.0: + version "2.1.0" + resolved "https://registry.yarnpkg.com/unicode-match-property-value-ecmascript/-/unicode-match-property-value-ecmascript-2.1.0.tgz#cb5fffdcd16a05124f5a4b0bf7c3770208acbbe0" + integrity sha512-qxkjQt6qjg/mYscYMC0XKRn3Rh0wFPlfxB0xkt9CfyTvpX1Ra0+rAmdX2QyAobptSEvuy4RtpPRui6XkV+8wjA== + unicode-property-aliases-ecmascript@^2.0.0: version "2.1.0" resolved "https://registry.npmjs.org/unicode-property-aliases-ecmascript/-/unicode-property-aliases-ecmascript-2.1.0.tgz" @@ -5279,6 +5781,11 @@ y18n@^5.0.5: resolved "https://registry.npmjs.org/y18n/-/y18n-5.0.8.tgz" integrity sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA== +yallist@^3.0.2: + version "3.1.1" + resolved "https://registry.yarnpkg.com/yallist/-/yallist-3.1.1.tgz#dbb7daf9bfd8bac9ab45ebf602b8cbad0d5d08fd" + integrity sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g== + yallist@^4.0.0: version "4.0.0" resolved "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz" From fc99abd8a66da6b54234105aaa5be4ce89bbab5e Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Wed, 10 May 2023 18:55:09 +0800 Subject: [PATCH 41/95] Refactor module resolution into its own function and added tests --- .../preprocessor/__tests__/resolver.ts | 69 +++++++++++++++++++ src/modules/preprocessor/resolver.ts | 45 ++++++++++++ 2 files changed, 114 insertions(+) create mode 100644 src/modules/preprocessor/__tests__/resolver.ts create mode 100644 src/modules/preprocessor/resolver.ts diff --git a/src/modules/preprocessor/__tests__/resolver.ts b/src/modules/preprocessor/__tests__/resolver.ts new file mode 100644 index 000000000..389e43c29 --- /dev/null +++ b/src/modules/preprocessor/__tests__/resolver.ts @@ -0,0 +1,69 @@ +import { memoizedGetModuleManifestAsync } from '../../moduleLoaderAsync' +import resolveModule from '../resolver' + +beforeEach(() => { + jest.clearAllMocks() +}) + +test('If only local imports are used, the module manifest is not loaded', async () => { + await resolveModule('/a.js', '/b.js', () => true, { + resolveDirectories: false, + resolveExtensions: null, + }) + + expect(memoizedGetModuleManifestAsync).toHaveBeenCalledTimes(0) +}) + +test('Returns false and resolved path of source file when resolution fails', () => { + return expect(resolveModule('/', './a', () => false, { + resolveDirectories: true, + resolveExtensions: ['js'] + })).resolves.toEqual([false, '/a']) +}) + +test('Will resolve directory imports', () => { + const mockResolver = (p: string) => p === '/a/index' + + return expect(resolveModule('/', '/a', mockResolver, { + resolveDirectories: true, + resolveExtensions: null + })).resolves.toEqual([true, '/a/index']) +}) + +test('Will resolve extensions', () => { + const mockResolver = (p: string) => p === '/a.ts' + + return expect(resolveModule('/', '/a', mockResolver, { + resolveDirectories: false, + resolveExtensions: ['js', 'ts'] + })).resolves.toEqual([true, '/a.ts']) +}) + +test('Will resolve directory import with extensions', () => { + const mockResolver = (p: string) => p === '/a/index.ts' + + return expect(resolveModule('/', '/a', mockResolver, { + resolveDirectories: true, + resolveExtensions: ['js', 'ts'] + })).resolves.toEqual([true, '/a/index.ts']) +}) + +test('Checks the module manifest when importing source modules', async () => { + const result = await resolveModule('/', 'one_module', () => false, { + resolveDirectories: true, + resolveExtensions: ['js'] + }) + + expect(memoizedGetModuleManifestAsync).toHaveBeenCalledTimes(1) + expect(result).toEqual([true, 'one_module']) +}) + +test('Returns false on failing to resolve a source module', async () => { + const result = await resolveModule('/', 'unknown_module', () => true, { + resolveDirectories: true, + resolveExtensions: ['js'] + }) + + expect(memoizedGetModuleManifestAsync).toHaveBeenCalledTimes(1) + expect(result).toEqual([false, 'unknown_module']) +}) \ No newline at end of file diff --git a/src/modules/preprocessor/resolver.ts b/src/modules/preprocessor/resolver.ts new file mode 100644 index 000000000..f9a769a58 --- /dev/null +++ b/src/modules/preprocessor/resolver.ts @@ -0,0 +1,45 @@ +import * as pathlib from 'path' + +import { isSourceImport } from '../../utils/ast/typeGuards' +import { memoizedGetModuleManifestAsync } from '../moduleLoaderAsync' +import { ImportResolutionOptions } from '../moduleTypes' + +/** + * Function that returns the full, absolute path to the module being imported + * @param ourPath Path of the current module + * @param source Path to the module being imported + * @param getModuleCode Predicate for checking if the given module exists + * @param options Import resolution options + */ +export default async function resolveModule( + ourPath: string, + source: string, + getModuleCode: (p: string) => boolean, + options: Omit, +): Promise<[resolved: boolean, modAbsPath: string]> { + if (isSourceImport(source)) { + const moduleManifest = await memoizedGetModuleManifestAsync() + return [source in moduleManifest, source] + } else { + const modAbsPath = pathlib.resolve(ourPath, '..', source) + if (getModuleCode(modAbsPath)) return [true, modAbsPath] + + if (options.resolveDirectories && getModuleCode(`${modAbsPath}/index`)) { + return [true, `${modAbsPath}/index`] + } + + if (options.resolveExtensions) { + for (const ext of options.resolveExtensions) { + if (getModuleCode(`${modAbsPath}.${ext}`)) return [true, `${modAbsPath}.${ext}`] + + if ( + options.resolveDirectories && + getModuleCode(`${modAbsPath}/index.${ext}`) + ) { + return [true, `${modAbsPath}/index.${ext}`] + } + } + } + return [false, modAbsPath] + } +} \ No newline at end of file From be7d663426759645056b5642708e7c3e35544bbe Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Wed, 10 May 2023 23:35:08 +0800 Subject: [PATCH 42/95] Allow import hoister to support namespace specifiers --- .../transformers/hoistAndMergeImports.ts | 60 +++++++++++++------ 1 file changed, 41 insertions(+), 19 deletions(-) diff --git a/src/modules/preprocessor/transformers/hoistAndMergeImports.ts b/src/modules/preprocessor/transformers/hoistAndMergeImports.ts index d3d79602f..93b19f5bf 100644 --- a/src/modules/preprocessor/transformers/hoistAndMergeImports.ts +++ b/src/modules/preprocessor/transformers/hoistAndMergeImports.ts @@ -5,6 +5,7 @@ import { createIdentifier, createImportDeclaration, createImportDefaultSpecifier, + createImportNamespaceSpecifier, createImportSpecifier, createLiteral } from '../constructors/baseConstructors' @@ -22,19 +23,19 @@ import { * hoisted & duplicate imports merged. */ export default function hoistAndMergeImports(program: es.Program, programs: es.Program[]) { - const importNodes = programs.flatMap(({ body }) => body) - .filter(isImportDeclaration) - const importsToSpecifiers = new Map>>() + const importNodes = programs.flatMap(({ body }) => body).filter(isImportDeclaration) + const importsToSpecifiers = new Map, imports: Map>}>() for (const node of importNodes) { - if (!node.source) continue - const source = node.source!.value as string // We no longer need imports from non-source modules, so we can just ignore them if (!isSourceImport(source)) continue if (!importsToSpecifiers.has(source)) { - importsToSpecifiers.set(source, new Map()) + importsToSpecifiers.set(source, { + namespaceSymbols: new Set(), + imports: new Map() + }) } const specifierMap = importsToSpecifiers.get(source)! node.specifiers.forEach(spec => { @@ -49,36 +50,57 @@ export default function hoistAndMergeImports(program: es.Program, programs: es.P break } case 'ImportNamespaceSpecifier': { - // TODO handle - throw new Error('ImportNamespaceSpecifiers are not supported!') + specifierMap.namespaceSymbols.add(spec.local.name) + return } } - if (!specifierMap.has(importingName)) { - specifierMap.set(importingName, new Set()) + if (!specifierMap.imports.has(importingName)) { + specifierMap.imports.set(importingName, new Set()) } - specifierMap.get(importingName)!.add(spec.local.name) + specifierMap.imports.get(importingName)!.add(spec.local.name) }) } // Every distinct source module being imported is given its own ImportDeclaration node - const importDeclarations = Array.from(importsToSpecifiers.entries()).map( - ([moduleName, imports]) => { + const importDeclarations = Array.from(importsToSpecifiers.entries()).flatMap( + ([moduleName, { imports, namespaceSymbols }]) => { // Across different modules, the user may choose to alias some of the declarations, so we keep track, // of all the different aliases used for each unique imported symbol const specifiers = Array.from(imports.entries()).flatMap(([importedName, aliases]) => { - if (importedName === 'default') { - return Array.from(aliases).map(alias => - createImportDefaultSpecifier(createIdentifier(alias)) - ) as (es.ImportSpecifier | es.ImportDefaultSpecifier)[] - } else { + if (importedName !== 'default') { return Array.from(aliases).map(alias => createImportSpecifier(createIdentifier(alias), createIdentifier(importedName)) ) + } else { + return [] } }) - return createImportDeclaration(specifiers, createLiteral(moduleName)) + let output = specifiers.length > 0 ? [createImportDeclaration(specifiers, createLiteral(moduleName))] : [] + if (imports.has('default')) { + // You can't have multiple default specifiers per node, so we need to create + // a new node for each + output = output.concat( + Array.from(imports.get('default')!.values()).map(alias => + createImportDeclaration( + [createImportDefaultSpecifier(createIdentifier(alias))], + createLiteral(moduleName) + ) + ) + ) + } + + if (namespaceSymbols.size > 0) { + // You can't have multiple namespace specifiers per node, so we need to create + // a new node for each + output = output.concat(Array.from(namespaceSymbols).map(alias => createImportDeclaration( + [createImportNamespaceSpecifier(createIdentifier(alias))], + createLiteral(moduleName) + ))) + } + + return output } ) program.body = [...importDeclarations, ...program.body] From 644360aff207a2fb49413954a85128335e8a4764 Mon Sep 17 00:00:00 2001 From: Lee Yi Date: Wed, 10 May 2023 23:37:20 +0800 Subject: [PATCH 43/95] Update how evaluation options are handled --- src/ec-evaluator/interpreter.ts | 4 +- src/index.ts | 28 ++++++---- src/infiniteLoops/instrument.ts | 1 - src/interpreter/interpreter.ts | 2 +- src/modules/moduleTypes.ts | 32 ++++++++++- src/modules/preprocessor/index.ts | 89 +++++++++---------------------- src/runner/fullJSRunner.ts | 6 +-- src/runner/htmlRunner.ts | 4 +- src/runner/sourceRunner.ts | 41 ++++++++------ src/runner/utils.ts | 4 +- src/types.ts | 11 ++++ src/utils/testing.ts | 2 +- 12 files changed, 120 insertions(+), 104 deletions(-) diff --git a/src/ec-evaluator/interpreter.ts b/src/ec-evaluator/interpreter.ts index 37c08db9b..c91569c6e 100644 --- a/src/ec-evaluator/interpreter.ts +++ b/src/ec-evaluator/interpreter.ts @@ -15,7 +15,7 @@ import * as errors from '../errors/errors' import { RuntimeSourceError } from '../errors/runtimeSourceError' import Closure from '../interpreter/closure' import { loadModuleBundleAsync } from '../modules/moduleLoaderAsync' -import { ImportTransformOptions } from '../modules/moduleTypes' +import { ImportOptions } from '../modules/moduleTypes' import { transformImportNodesAsync } from '../modules/utils' import { checkEditorBreakpoints } from '../stdlib/inspector' import { Context, ContiguousArrayElements, Result, Value } from '../types' @@ -141,7 +141,7 @@ export function resumeEvaluate(context: Context) { async function evaluateImports( program: es.Program, context: Context, - { loadTabs, wrapModules }: ImportTransformOptions + { loadTabs, wrapModules }: ImportOptions ) { const [importNodes, otherNodes] = partition( program.body, diff --git a/src/index.ts b/src/index.ts index 800eed4eb..51ac20baf 100644 --- a/src/index.ts +++ b/src/index.ts @@ -16,11 +16,11 @@ import { FuncDeclWithInferredTypeAnnotation, ModuleContext, NodeWithInferredType, + RecursivePartial, Result, SourceError, SVMProgram, - Variant -} from './types' + Variant} from './types' import { findNodeAt } from './utils/ast/walkers' import { assemble } from './vm/svml-assembler' import { compileToIns } from './vm/svml-compiler' @@ -28,7 +28,10 @@ export { SourceDocumentation } from './editors/ace/docTooltip' import * as es from 'estree' import { ECEResultPromise, resumeEvaluate } from './ec-evaluator/interpreter' -import { ImportTransformOptions } from './modules/moduleTypes' +import { ModuleNotFoundError } from './modules/errors' +import { ImportOptions } from './modules/moduleTypes' +import preprocessFileImports from './modules/preprocessor' +import { validateFilePath } from './modules/preprocessor/filePaths' import { getKeywords, getProgramNames, NameDeclaration } from './name-extractor' import { parse } from './parser/parser' import { decodeError, decodeValue } from './parser/scheme' @@ -38,13 +41,10 @@ import { hasVerboseErrors, htmlRunner, resolvedErrorPromise, - sourceFilesRunner, + sourceFilesRunner } from './runner' import { typeCheck } from './typeChecker/typeChecker' import { typeToString } from './utils/stringify' -import { validateFilePath } from './modules/preprocessor/filePaths' -import preprocessFileImports from './modules/preprocessor' -import { ModuleNotFoundError } from './modules/errors' export interface IOptions { scheduler: 'preemptive' | 'async' @@ -57,10 +57,13 @@ export interface IOptions { isPrelude: boolean throwInfiniteLoops: boolean - importOptions: ImportTransformOptions + importOptions: ImportOptions /** Set to true to console log the transpiler's transpiled code */ logTranspilerOutput: boolean + + /** Set to true to console log the preprocessor's output */ + logPreprocessorOutput: boolean } // needed to work on browsers @@ -312,7 +315,7 @@ export function getTypeInformation( export async function runInContext( code: string, context: Context, - options: Partial = {} + options: RecursivePartial = {} ): Promise { const defaultFilePath = '/default.js' const files: Partial> = {} @@ -324,7 +327,7 @@ export async function runFilesInContext( files: Partial>, entrypointFilePath: string, context: Context, - options: Partial = {} + options: RecursivePartial = {} ): Promise { for (const filePath in files) { const filePathError = validateFilePath(filePath) @@ -383,7 +386,10 @@ export async function runFilesInContext( // This is not a huge priority, but it would be good not to make use of // global state. verboseErrors = hasVerboseErrors(code) - return sourceFilesRunner(files, entrypointFilePath, context, options) + return sourceFilesRunner(files, entrypointFilePath, context, { + ...options, + logPreprocessorOutput: true + }) } export function resume(result: Result): Finished | ResultError | Promise { diff --git a/src/infiniteLoops/instrument.ts b/src/infiniteLoops/instrument.ts index e7ff6f0ee..8b0134b34 100644 --- a/src/infiniteLoops/instrument.ts +++ b/src/infiniteLoops/instrument.ts @@ -584,7 +584,6 @@ async function handleImports(programs: es.Program[]): Promise<[string, string[]] { loadTabs: false, wrapModules: false, - allowUndefinedImports: true } ) diff --git a/src/interpreter/interpreter.ts b/src/interpreter/interpreter.ts index 9ef6f2447..1200f6d44 100644 --- a/src/interpreter/interpreter.ts +++ b/src/interpreter/interpreter.ts @@ -7,7 +7,7 @@ import { LazyBuiltIn } from '../createContext' import * as errors from '../errors/errors' import { RuntimeSourceError } from '../errors/runtimeSourceError' import { loadModuleBundle } from '../modules/moduleLoader' -import { ImportTransformOptions, ModuleFunctions } from '../modules/moduleTypes' +import type { ImportTransformOptions, ModuleFunctions } from '../modules/moduleTypes' import { initModuleContext } from '../modules/utils' import { checkEditorBreakpoints } from '../stdlib/inspector' import { Context, ContiguousArrayElements, Environment, Frame, Value, Variant } from '../types' diff --git a/src/modules/moduleTypes.ts b/src/modules/moduleTypes.ts index 3121c3b40..f5a6e8285 100644 --- a/src/modules/moduleTypes.ts +++ b/src/modules/moduleTypes.ts @@ -6,8 +6,38 @@ export type ModuleFunctions = Record export type ModuleDocumentation = Record export type ImportTransformOptions = { + /** Set to true to load module tabs */ loadTabs: boolean + + /** + * Wrapping a Source module involves creating nice toString outputs for + * each of its functions. If this behaviour is desired, set this to true + */ wrapModules: boolean +} + +export type ImportResolutionOptions = { + /** + * Set this to true if directories should be resolved + * @example + * ``` + * import { a } from './dir0'; // will resolve to 'dir0/index' + * ``` + */ + resolveDirectories: boolean + + /** + * Pass null to enforce strict file names: `'./dir0/file'` will resolve to exactly that path. + * Otherwise pass an array of file extensions `['js', 'ts']`. For example, if `./dir0/file` is not located, + * it will then search for that file with the given extension, e.g. `./dir0/file.js` + */ + resolveExtensions: string[] | null + + /** + * Set this to true to enforce that imports from modules must be of + * defined symbols + */ allowUndefinedImports: boolean - // useThis: boolean; } + +export type ImportOptions = ImportResolutionOptions & ImportTransformOptions diff --git a/src/modules/preprocessor/index.ts b/src/modules/preprocessor/index.ts index aa64a2d20..e20caf19b 100644 --- a/src/modules/preprocessor/index.ts +++ b/src/modules/preprocessor/index.ts @@ -1,21 +1,23 @@ import type es from 'estree' import * as pathlib from 'path' -import { CircularImportError, ModuleNotFoundError } from '../errors' -import { memoizedGetModuleDocsAsync, memoizedGetModuleManifestAsync } from '../moduleLoaderAsync' -import { ModuleManifest } from '../moduleTypes' import { parse } from '../../parser/parser' import { AcornOptions } from '../../parser/types' import { Context } from '../../types' import assert from '../../utils/assert' import { isModuleDeclaration, isSourceImport } from '../../utils/ast/typeGuards' import { isIdentifier } from '../../utils/rttc' +import { CircularImportError, ModuleNotFoundError } from '../errors' +import { memoizedGetModuleDocsAsync } from '../moduleLoaderAsync' +import { ImportResolutionOptions } from '../moduleTypes' +import checkForUndefinedImportsAndReexports from './analyzer' import { createInvokedFunctionResultVariableDeclaration } from './constructors/contextSpecificConstructors' import { DirectedGraph } from './directedGraph' import { transformFilePathToValidFunctionName, transformFunctionNameToInvokedFunctionResultVariableName } from './filePaths' +import resolveModule from './resolver' import hoistAndMergeImports from './transformers/hoistAndMergeImports' import removeImportsAndExports from './transformers/removeImportsAndExports' import { @@ -23,7 +25,6 @@ import { getInvokedFunctionResultVariableNameToImportSpecifiersMap, transformProgramToFunctionDeclaration } from './transformers/transformProgramToFunctionDeclaration' -import checkForUndefinedImportsAndReexports from './analyzer' /** * Error type to indicate that preprocessing has failed but that the context @@ -31,23 +32,18 @@ import checkForUndefinedImportsAndReexports from './analyzer' */ class PreprocessError extends Error {} -type ModuleResolutionOptions = { - directory?: boolean - extensions: string[] | null - allowBuiltins?: boolean -} -const defaultResolutionOptions: Required = { - directory: false, - extensions: null, - allowBuiltins: false +const defaultResolutionOptions: Required = { + allowUndefinedImports: false, + resolveDirectories: false, + resolveExtensions: null, } export const parseProgramsAndConstructImportGraph = async ( files: Partial>, entrypointFilePath: string, context: Context, - rawResolutionOptions: Partial = {} + rawResolutionOptions: Partial = {} ): Promise<{ programs: Record importGraph: DirectedGraph @@ -66,56 +62,21 @@ export const parseProgramsAndConstructImportGraph = async ( const moduleDocs: Record> = {} - // If a Source import is never used, then there will be no need to - // load the module manifest - let moduleManifest: ModuleManifest | null = null - - function getModuleCode(p: string) { - // In the future we can abstract this function out and hopefully interface directly - // with actual file systems - return files[p] - } - - // From the given import source, return the absolute path for that import - // If the import could not be located, then throw an error - async function resolveModule( - desiredPath: string, - node: Exclude - ): Promise { + const resolve = async (path: string, node: Exclude) => { const source = node.source?.value assert( typeof source === 'string', `${node.type} should have a source of type string, got ${source}` ) - let modAbsPath: string - if (isSourceImport(source)) { - if (!moduleManifest) { - moduleManifest = await memoizedGetModuleManifestAsync() - } - - if (source in moduleManifest) return source - modAbsPath = source - } else { - modAbsPath = pathlib.resolve(desiredPath, '..', source) - if (getModuleCode(modAbsPath) !== undefined) return modAbsPath - - if (resolutionOptions.directory && getModuleCode(`${modAbsPath}/index`) !== undefined) { - return `${modAbsPath}/index` - } - - if (resolutionOptions.extensions) { - for (const ext of resolutionOptions.extensions) { - if (getModuleCode(`${modAbsPath}.${ext}`) !== undefined) return `${modAbsPath}.${ext}` - - if (resolutionOptions.directory && getModuleCode(`${modAbsPath}/index.${ext}`) !== undefined) { - return `${modAbsPath}/index.${ext}` - } - } - } - } - - throw new ModuleNotFoundError(modAbsPath, node) + const [resolved, modAbsPath] = await resolveModule( + path, + source, + p => files[p] !== undefined, + resolutionOptions + ) + if (!resolved) throw new ModuleNotFoundError(modAbsPath, node) + return modAbsPath } async function parseFile(currentFilePath: string): Promise { @@ -134,7 +95,7 @@ export const parseProgramsAndConstructImportGraph = async ( if (currentFilePath in programs) return - const code = getModuleCode(currentFilePath) + const code = files[currentFilePath] assert( code !== undefined, "Module resolver should've thrown an error if the file path did not resolve" @@ -164,7 +125,7 @@ export const parseProgramsAndConstructImportGraph = async ( } case 'ExportAllDeclaration': case 'ImportDeclaration': { - const modAbsPath = await resolveModule(currentFilePath, node) + const modAbsPath = await resolve(currentFilePath, node) if (modAbsPath === currentFilePath) { throw new CircularImportError([modAbsPath, currentFilePath]) } @@ -214,9 +175,10 @@ export const parseProgramsAndConstructImportGraph = async ( export type PreprocessOptions = { allowUndefinedImports?: boolean -} +} & ImportResolutionOptions const defaultOptions: Required = { + ...defaultResolutionOptions, allowUndefinedImports: false } @@ -243,7 +205,7 @@ const preprocessFileImports = async ( context: Context, rawOptions: Partial = {} ): Promise => { - const { allowUndefinedImports } = { + const { allowUndefinedImports, ...resolutionOptions } = { ...defaultOptions, ...rawOptions } @@ -252,7 +214,8 @@ const preprocessFileImports = async ( const { programs, importGraph, moduleDocs } = await parseProgramsAndConstructImportGraph( files, entrypointFilePath, - context + context, + resolutionOptions, ) // Return 'undefined' if there are errors while parsing. diff --git a/src/runner/fullJSRunner.ts b/src/runner/fullJSRunner.ts index d3b4742e0..e33c2a6df 100644 --- a/src/runner/fullJSRunner.ts +++ b/src/runner/fullJSRunner.ts @@ -9,7 +9,7 @@ import { RuntimeSourceError } from '../errors/runtimeSourceError' import { getRequireProvider, RequireProvider } from '../modules/requireProvider' import { parse } from '../parser/parser' import { evallerReplacer, getBuiltins, transpile } from '../transpiler/transpiler' -import type { Context, NativeStorage } from '../types' +import type { Context, NativeStorage, RecursivePartial } from '../types' import * as create from '../utils/ast/astCreator' import { toSourceError } from './errors' import { resolvedErrorPromise } from './utils' @@ -47,7 +47,7 @@ function containsPrevEval(context: Context): boolean { export async function fullJSRunner( program: es.Program, context: Context, - options: Partial = {} + options: RecursivePartial = {} ): Promise { // prelude & builtins // only process builtins and preludes if it is a fresh eval context @@ -71,7 +71,7 @@ export async function fullJSRunner( let transpiled let sourceMapJson: RawSourceMap | undefined try { - ;({ transpiled, sourceMapJson } = await transpile(program, context)) + ;({ transpiled, sourceMapJson } = await transpile(program, context, options.importOptions)) if (options.logTranspilerOutput) console.log(transpiled) return { status: 'finished', diff --git a/src/runner/htmlRunner.ts b/src/runner/htmlRunner.ts index f52c688f8..ba17dd062 100644 --- a/src/runner/htmlRunner.ts +++ b/src/runner/htmlRunner.ts @@ -1,5 +1,5 @@ import { IOptions, Result } from '..' -import { Context } from '../types' +import { Context, RecursivePartial } from '../types' const HTML_ERROR_HANDLING_SCRIPT_TEMPLATE = `