feat: bundle (#11)

* feat: add bundle command

* docs(changeset): feat: add bundle command

* chore: clean up

* chore: code style

.changeset/flat-comics-learn.md

@@ -0,0 +1,5 @@
+---
+"@scalar/cli": patch
+---
+
+feat: add bundle command

README.md

@@ -14,6 +14,7 @@ Command-line interface to work with OpenAPI files
 * Upload your OpenAPI files to Scalar
 * Get a fully mocked API for testing purposes
 * Preview your API reference
+* Bundle multiple OpenAPI files
 
 ## Quickstart
 
@@ -34,8 +35,9 @@ scalar --version
 scalar init
 scalar format openapi.json
 scalar validate openapi.json
-scalar reference openapi.json
-scalar mock openapi.json
+scalar bundle openapi.json --output bundle.json
+scalar reference openapi.json --watch
+scalar mock openapi.json --watch
 scalar share openapi.json
 ```
 

packages/cli/README.md

@@ -62,6 +62,16 @@ You can also change the port like this:
 scalar mock openapi.json --watch --port 8080
 ```
 
+### bundle
+
+Some OpenAPI files reference other files from the file system or an URL. You can bundle those files and make them a single file:
+
+```bash
+scalar bundle openapi.json --output bundle.json
+```
+
+If you don’t provide an `output` file name, the input file will be overwritten.
+
 ### init
 
 If you’re tired of passing the file name again and again, just configure it once:

packages/cli/src/commands/bundle/BundleCommand.ts

@@ -0,0 +1,57 @@
+import fs from 'node:fs'
+import { Command } from 'commander'
+import kleur from 'kleur'
+import type { OpenAPI } from 'openapi-types'
+import { loadOpenApiFile, useGivenFileOrConfiguration } from '../../utils'
+
+export function BundleCommand() {
+  const cmd = new Command('bundle')
+
+  cmd.description('Resolve all references in an OpenAPI file')
+  cmd.argument('[file]', 'file to bundle')
+  cmd.option('-o, --output <file>', 'output file')
+  cmd.action(async (fileArgument: string) => {
+    const { output } = cmd.opts()
+
+    const startTime = performance.now()
+
+    const file = useGivenFileOrConfiguration(fileArgument)
+
+    const newContent = (await loadOpenApiFile(file))
+      .specification as OpenAPI.Document
+
+    // Replace file content with newContent
+    const cache = []
+    const json = JSON.stringify(
+      newContent,
+      (key, value) => {
+        if (typeof value === 'object' && value !== null) {
+          if (cache.indexOf(value) !== -1) {
+            // Circular reference found, discard key
+            return
+          }
+          // Store value in our collection
+          cache.push(value)
+        }
+        return value
+      },
+      2,
+    )
+
+    fs.writeFileSync(output ?? file, json, 'utf8')
+
+    const endTime = performance.now()
+
+    console.log(
+      kleur.green('OpenAPI Schema bundled'),
+      kleur.grey(
+        `in ${kleur.white(
+          `${kleur.bold(`${Math.round(endTime - startTime)}`)} ms`,
+        )}`,
+      ),
+    )
+    console.log()
+  })
+
+  return cmd
+}

packages/cli/src/commands/index.ts

@@ -1,3 +1,4 @@
+export * from './bundle/BundleCommand'
 export * from './format/FormatCommand'
 export * from './init/InitCommand'
 export * from './mock/MockCommand'

packages/cli/src/index.ts

@@ -3,6 +3,7 @@
 import { Command } from 'commander'
 import { version } from '../package.json'
 import {
+  BundleCommand,
   FormatCommand,
   InitCommand,
   MockCommand,
@@ -23,6 +24,7 @@ program.addCommand(InitCommand(), {
 })
 program.addCommand(FormatCommand())
 program.addCommand(ValidateCommand())
+program.addCommand(BundleCommand())
 program.addCommand(ReferenceCommand())
 program.addCommand(MockCommand())
 program.addCommand(ShareCommand())