Use case-insensitive synced buffer map on case-insensitive file systems

Fixes #51183
Fixes #50505

extensions/typescript-language-features/src/features/bufferSyncSupport.ts

@@ -11,6 +11,8 @@ import { Delayer } from '../utils/async';
 import { disposeAll } from '../utils/dispose';
 import * as languageModeIds from '../utils/languageModeIds';
 import API from '../utils/api';
+import { memoize } from '../utils/memoize';
+import { getTempFile } from '../utils/temp';
 
 enum BufferKind {
 	TypeScript = 1,
@@ -69,6 +71,10 @@ class SyncedBuffer {
 		this.client.execute('open', args, false);
 	}
 
+	public get resource(): Uri {
+		return this.document.uri;
+	}
+
 	public get lineCount(): number {
 		return this.document.lineCount;
 	}
@@ -126,6 +132,10 @@ class SyncedBufferMap {
 		return file ? this._map.get(file) : undefined;
 	}
 
+	public getForPath(filePath: string): SyncedBuffer | undefined {
+		return this.get(Uri.file(filePath));
+	}
+
 	public set(resource: Uri, buffer: SyncedBuffer) {
 		const file = this.toKey(resource);
 		if (file) {
@@ -149,7 +159,8 @@ class SyncedBufferMap {
 	}
 
 	private toKey(resource: Uri): string | null {
-		return this._normalizePath(resource);
+		const key = this._normalizePath(resource);
+		return key ? key.toLowerCase() : key;
 	}
 }
 
@@ -178,7 +189,7 @@ export default class BufferSyncSupport {
 
 		this.diagnosticDelayer = new Delayer<any>(300);
 
-		this.syncedBuffers = new SyncedBufferMap(path => this.client.normalizedPath(path));
+		this.syncedBuffers = new SyncedBufferMap(path => this.normalizePath(path));
 
 		this.updateConfiguration();
 		workspace.onDidChangeConfiguration(() => this.updateConfiguration(), null);
@@ -202,6 +213,14 @@ export default class BufferSyncSupport {
 		return this.syncedBuffers.has(resource);
 	}
 
+	public toResource(filePath: string): Uri {
+		const buffer = this.syncedBuffers.getForPath(filePath);
+		if (buffer) {
+			return buffer.resource;
+		}
+		return Uri.file(filePath);
+	}
+
 	public reOpenDocuments(): void {
 		for (const buffer of this.syncedBuffers.allBuffers) {
 			buffer.open();
@@ -376,4 +395,40 @@ export default class BufferSyncSupport {
 				return this._validateTypeScript;
 		}
 	}
-}
+
+	private normalizePath(path: Uri): string | null {
+		const key = this.client.normalizedPath(path);
+		if (!key) {
+			return key;
+		}
+
+		return this.isCaseInsensitivePath(key) ? key.toLowerCase() : key;
+	}
+
+	private isCaseInsensitivePath(path: string) {
+		if (isWindowsPath(path)) {
+			return true;
+		}
+
+		return path[0] === '/' && this.onIsCaseInsenitiveFileSystem;
+	}
+
+	@memoize
+	private get onIsCaseInsenitiveFileSystem() {
+		if (process.platform === 'win32') {
+			return true;
+		}
+
+		if (process.platform !== 'darwin') {
+			return false;
+		}
+
+		const temp = getTempFile('typescript-case-check');
+		fs.writeFileSync(temp, '');
+		return fs.existsSync(temp.toUpperCase());
+	}
+}
+
+function isWindowsPath(path: string): boolean {
+	return /^[a-zA-Z]:\\/.test(path);
+}

extensions/typescript-language-features/src/typescriptServiceClient.ts

@@ -663,9 +663,7 @@ export default class TypeScriptServiceClient implements ITypeScriptServiceClient
 				return resource;
 			}
 		}
-		const resource = Uri.file(filepath);
-
-		return resource;
+		return this.bufferSyncSupport.toResource(filepath);
 	}
 
 	public getWorkspaceRootForResource(resource: Uri): string | undefined {
@@ -976,7 +974,7 @@ export default class TypeScriptServiceClient implements ITypeScriptServiceClient
 		}
 
 		if (this.apiVersion.gte(API.v222)) {
-			this.cancellationPipeName = electron.getTempFile(`tscancellation-${electron.makeRandomHexString(20)}`);
+			this.cancellationPipeName = electron.getTempSock('tscancellation');
 			args.push('--cancellationPipeName', this.cancellationPipeName + '*');
 		}
 

extensions/typescript-language-features/src/utils/electron.ts

@@ -3,25 +3,21 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
+import Logger from './logger';
+import { getTempFile, makeRandomHexString } from './temp';
 import path = require('path');
 import os = require('os');
 import net = require('net');
 import cp = require('child_process');
-import Logger from './logger';
 
 export interface IForkOptions {
 	cwd?: string;
 	execArgv?: string[];
 }
 
-export function makeRandomHexString(length: number): string {
-	let chars = ['0', '1', '2', '3', '4', '5', '6', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'];
-	let result = '';
-	for (let i = 0; i < length; i++) {
-		const idx = Math.floor(chars.length * Math.random());
-		result += chars[idx];
-	}
-	return result;
+export function getTempSock(prefix: string): string {
+	const fullName = `vscode-${prefix}-${makeRandomHexString(20)}`;
+	return getTempFile(fullName + '.sock');
 }
 
 function generatePipeName(): string {
@@ -38,12 +34,6 @@ function getPipeName(name: string): string {
 	return path.join(os.tmpdir(), fullName + '.sock');
 }
 
-export function getTempFile(name: string): string {
-	const fullName = 'vscode-' + name;
-	return path.join(os.tmpdir(), fullName + '.sock');
-}
-
-
 function generatePatchedEnv(
 	env: any,
 	stdInPipeName: string,
@@ -131,7 +121,7 @@ export function fork(
 	};
 
 	// Create the process
-	logger.info('Forking TSServer', `PATH: ${newEnv['PATH']}`);
+	logger.info('Forking TSServer', `PATH: ${newEnv['PATH']} `);
 
 	const bootstrapperPath = require.resolve('./electronForkStart');
 	childProcess = cp.fork(bootstrapperPath, [modulePath].concat(args), {

extensions/typescript-language-features/src/utils/temp.ts

@@ -0,0 +1,21 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import path = require('path');
+import os = require('os');
+
+export function makeRandomHexString(length: number): string {
+	let chars = ['0', '1', '2', '3', '4', '5', '6', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'];
+	let result = '';
+	for (let i = 0; i < length; i++) {
+		const idx = Math.floor(chars.length * Math.random());
+		result += chars[idx];
+	}
+	return result;
+}
+
+export function getTempFile(name: string): string {
+	return path.join(os.tmpdir(), name);
+}