feat: support resource operations

lib/adapters/apply-edit-adapter.ts

@@ -1,7 +1,19 @@
 import type * as atomIde from "atom-ide-base"
 import Convert from "../convert"
-import { LanguageClientConnection, ApplyWorkspaceEditParams, ApplyWorkspaceEditResponse } from "../languageclient"
+import {
+  LanguageClientConnection,
+  ApplyWorkspaceEditParams,
+  ApplyWorkspaceEditResponse,
+  WorkspaceEdit,
+  TextDocumentEdit,
+  CreateFile,
+  RenameFile,
+  DeleteFile,
+  DocumentUri,
+} from "../languageclient"
 import { TextBuffer, TextEditor } from "atom"
+import { promises as fsp, Stats } from "fs"
+import * as rimraf from "rimraf"
 
 /** Public: Adapts workspace/applyEdit commands to editors. */
 export default class ApplyEditAdapter {
@@ -17,7 +29,7 @@ export default class ApplyEditAdapter {
       // Sort edits in reverse order to prevent edit conflicts.
       edits.sort((edit1, edit2) => -edit1.oldRange.compare(edit2.oldRange))
       edits.reduce((previous: atomIde.TextEdit | null, current) => {
-        ApplyEditAdapter.validateEdit(buffer, current, previous)
+        validateEdit(buffer, current, previous)
         buffer.setTextInRange(current.oldRange, current.newText)
         return current
       }, null)
@@ -30,36 +42,35 @@ export default class ApplyEditAdapter {
   }
 
   public static async onApplyEdit(params: ApplyWorkspaceEditParams): Promise<ApplyWorkspaceEditResponse> {
-    let changes = params.edit.changes || {}
-
-    if (params.edit.documentChanges) {
-      changes = {}
-      params.edit.documentChanges.forEach((change) => {
-        if (change && "textDocument" in change && change.textDocument) {
-          changes[change.textDocument.uri] = change.edits
-        }
-      })
-    }
+    return ApplyEditAdapter.apply(params.edit)
+  }
 
-    const uris = Object.keys(changes)
+  public static async apply(workspaceEdit: WorkspaceEdit): Promise<ApplyWorkspaceEditResponse> {
+    normalize(workspaceEdit)
 
     // Keep checkpoints from all successful buffer edits
     const checkpoints: Array<{ buffer: TextBuffer; checkpoint: number }> = []
 
-    const promises = uris.map(async (uri) => {
-      const path = Convert.uriToPath(uri)
-      const editor = (await atom.workspace.open(path, {
-        searchAllPanes: true,
-        // Open new editors in the background.
-        activatePane: false,
-        activateItem: false,
-      })) as TextEditor
-      const buffer = editor.getBuffer()
-      // Get an existing editor for the file, or open a new one if it doesn't exist.
-      const edits = Convert.convertLsTextEdits(changes[uri])
-      const checkpoint = ApplyEditAdapter.applyEdits(buffer, edits)
-      checkpoints.push({ buffer, checkpoint })
-    })
+    const promises = (workspaceEdit.documentChanges || []).map(
+      async (edit): Promise<void> => {
+        if (!TextDocumentEdit.is(edit)) {
+          return ApplyEditAdapter.handleResourceOperation(edit).catch((err) => {
+            throw Error(`Error during ${edit.kind} resource operation: ${err.message}`)
+          })
+        }
+        const path = Convert.uriToPath(edit.textDocument.uri)
+        const editor = (await atom.workspace.open(path, {
+          searchAllPanes: true,
+          // Open new editors in the background.
+          activatePane: false,
+          activateItem: false,
+        })) as TextEditor
+        const buffer = editor.getBuffer()
+        const edits = Convert.convertLsTextEdits(edit.edits)
+        const checkpoint = ApplyEditAdapter.applyEdits(buffer, edits)
+        checkpoints.push({ buffer, checkpoint })
+      }
+    )
 
     // Apply all edits or fail and revert everything
     const applied = await Promise.all(promises)
@@ -78,17 +89,100 @@ export default class ApplyEditAdapter {
     return { applied }
   }
 
-  /** Private: Do some basic sanity checking on the edit ranges. */
-  private static validateEdit(buffer: TextBuffer, edit: atomIde.TextEdit, prevEdit: atomIde.TextEdit | null): void {
-    const path = buffer.getPath() || ""
-    if (prevEdit && edit.oldRange.end.compare(prevEdit.oldRange.start) > 0) {
-      throw Error(`Found overlapping edit ranges in ${path}`)
+  private static async handleResourceOperation(edit: CreateFile | RenameFile | DeleteFile): Promise<void> {
+    if (DeleteFile.is(edit)) {
+      const path = Convert.uriToPath(edit.uri)
+      const stats: boolean | Stats = await fsp.lstat(path).catch(() => false)
+      const ignoreIfNotExists = edit.options?.ignoreIfNotExists
+
+      if (!stats) {
+        if (ignoreIfNotExists !== false) {
+          return
+        }
+        throw Error(`Target doesn't exist.`)
+      }
+
+      if (stats.isDirectory()) {
+        if (edit.options?.recursive) {
+          return new Promise((resolve, reject) => {
+            rimraf(path, { glob: false }, (err) => {
+              if (err) {
+                reject(err)
+              }
+              resolve()
+            })
+          })
+        }
+        return fsp.rmdir(path, { recursive: edit.options?.recursive })
+      }
+
+      return fsp.unlink(path)
     }
-    const startRow = edit.oldRange.start.row
-    const startCol = edit.oldRange.start.column
-    const lineLength = buffer.lineLengthForRow(startRow)
-    if (lineLength == null || startCol > lineLength) {
-      throw Error(`Out of range edit on ${path}:${startRow + 1}:${startCol + 1}`)
+    if (RenameFile.is(edit)) {
+      const oldPath = Convert.uriToPath(edit.oldUri)
+      const newPath = Convert.uriToPath(edit.newUri)
+      const exists = await fsp
+        .access(newPath)
+        .then(() => true)
+        .catch(() => false)
+      const ignoreIfExists = edit.options?.ignoreIfExists
+      const overwrite = edit.options?.overwrite
+
+      if (exists && ignoreIfExists && !overwrite) {
+        return
+      }
+
+      if (exists && !ignoreIfExists && !overwrite) {
+        throw Error(`Target exists.`)
+      }
+
+      return fsp.rename(oldPath, newPath)
     }
+    if (CreateFile.is(edit)) {
+      const path = Convert.uriToPath(edit.uri)
+      const exists = await fsp
+        .access(path)
+        .then(() => true)
+        .catch(() => false)
+      const ignoreIfExists = edit.options?.ignoreIfExists
+      const overwrite = edit.options?.overwrite
+
+      if (exists && ignoreIfExists && !overwrite) {
+        return
+      }
+
+      return fsp.writeFile(path, "")
+    }
+  }
+}
+
+function normalize(workspaceEdit: WorkspaceEdit): void {
+  const documentChanges = workspaceEdit.documentChanges || []
+
+  if (!("documentChanges" in workspaceEdit) && "changes" in workspaceEdit) {
+    Object.keys(workspaceEdit.changes || []).forEach((uri: DocumentUri) => {
+      documentChanges.push({
+        textDocument: {
+          version: null,
+          uri,
+        },
+        edits: workspaceEdit.changes![uri],
+      })
+    })
+  }
+
+  workspaceEdit.documentChanges = documentChanges
+}
+
+function validateEdit(buffer: TextBuffer, edit: atomIde.TextEdit, prevEdit: atomIde.TextEdit | null): void {
+  const path = buffer.getPath() || ""
+  if (prevEdit && edit.oldRange.end.compare(prevEdit.oldRange.start) > 0) {
+    throw Error(`Found overlapping edit ranges in ${path}`)
+  }
+  const startRow = edit.oldRange.start.row
+  const startCol = edit.oldRange.start.column
+  const lineLength = buffer.lineLengthForRow(startRow)
+  if (lineLength == null || startCol > lineLength) {
+    throw Error(`Out of range edit on ${path}:${startRow + 1}:${startCol + 1}`)
   }
 }

lib/auto-languageclient.ts

@@ -122,6 +122,7 @@ export default class AutoLanguageClient {
             documentChanges: true,
             normalizesLineEndings: false,
             changeAnnotationSupport: undefined,
+            resourceOperations: ["create", "rename", "delete"],
           },
           workspaceFolders: false,
           didChangeConfiguration: {

package.json

@@ -26,7 +26,9 @@
   "prettier": "prettier-config-atomic",
   "atomTestRunner": "./test/runner",
   "dependencies": {
+    "@types/rimraf": "^3.0.0",
     "atom-ide-base": "^2.4.0",
+    "rimraf": "^3.0.2",
     "vscode-jsonrpc": "6.0.0",
     "vscode-languageserver-protocol": "3.16.0",
     "vscode-languageserver-types": "3.16.0",