watcher - enable event correlation for all users of new proposed API

src/vs/workbench/api/browser/mainThreadFileSystemEventService.ts

@@ -212,7 +212,7 @@ export class MainThreadFileSystemEventService implements MainThreadFileSystemEve
 		this._listener.add(workingCopyFileService.onDidRunWorkingCopyFileOperation(e => this._proxy.$onDidRunFileOperation(e.operation, e.files)));
 	}
 
-	async $watch(extensionId: string, session: number, resource: UriComponents, unvalidatedOpts: IWatchOptions): Promise<void> {
+	async $watch(extensionId: string, session: number, resource: UriComponents, unvalidatedOpts: IWatchOptions, correlate: boolean): Promise<void> {
 		const uri = URI.revive(resource);
 
 		const opts: IWatchOptions = {
@@ -234,8 +234,7 @@ export class MainThreadFileSystemEventService implements MainThreadFileSystemEve
 			}
 		}
 
-		// Correlated file watching is taken as is (for now we only opt into correlating with proposed new file system watcher API with excludes)
-		const correlate = Array.isArray(unvalidatedOpts?.excludes) && unvalidatedOpts.excludes.length > 0;
+		// Correlated file watching is taken as is
 		if (correlate) {
 			this._logService.trace(`MainThreadFileSystemEventService#$watch(): request to start watching correlated (extension: ${extensionId}, path: ${uri.toString(true)}, recursive: ${opts.recursive}, session: ${session})`);
 

src/vs/workbench/api/common/extHost.api.impl.ts

@@ -28,7 +28,7 @@ import { ExtHostDocuments } from 'vs/workbench/api/common/extHostDocuments';
 import { IExtHostDocumentsAndEditors } from 'vs/workbench/api/common/extHostDocumentsAndEditors';
 import { Extension, IExtHostExtensionService } from 'vs/workbench/api/common/extHostExtensionService';
 import { ExtHostFileSystem } from 'vs/workbench/api/common/extHostFileSystem';
-import { ExtHostFileSystemEventService } from 'vs/workbench/api/common/extHostFileSystemEventService';
+import { ExtHostFileSystemEventService, FileSystemWatcherCreateOptions } from 'vs/workbench/api/common/extHostFileSystemEventService';
 import { ExtHostLanguageFeatures } from 'vs/workbench/api/common/extHostLanguageFeatures';
 import { ExtHostLanguages } from 'vs/workbench/api/common/extHostLanguages';
 import { ExtHostMessageService } from 'vs/workbench/api/common/extHostMessageService';
@@ -947,17 +947,21 @@ export function createApiFactoryAndRegisterActors(accessor: ServicesAccessor): I
 				return extHostBulkEdits.applyWorkspaceEdit(edit, extension, metadata);
 			},
 			createFileSystemWatcher: (pattern, optionsOrIgnoreCreate, ignoreChange?, ignoreDelete?): vscode.FileSystemWatcher => {
-				let options: vscode.FileSystemWatcherOptions | undefined = undefined;
+				let options: FileSystemWatcherCreateOptions | undefined = undefined;
 
 				if (typeof optionsOrIgnoreCreate === 'boolean') {
 					options = {
 						ignoreCreateEvents: Boolean(optionsOrIgnoreCreate),
 						ignoreChangeEvents: Boolean(ignoreChange),
-						ignoreDeleteEvents: Boolean(ignoreDelete)
+						ignoreDeleteEvents: Boolean(ignoreDelete),
+						correlate: false
 					};
 				} else if (optionsOrIgnoreCreate) {
 					checkProposedApiEnabled(extension, 'createFileSystemWatcher');
-					options = optionsOrIgnoreCreate;
+					options = {
+						...optionsOrIgnoreCreate,
+						correlate: true
+					};
 				}
 
 				return extHostFileSystemEvent.createFileSystemWatcher(extHostWorkspace, extension, pattern, options);

src/vs/workbench/api/common/extHost.protocol.ts

@@ -1351,7 +1351,7 @@ export interface MainThreadFileSystemShape extends IDisposable {
 }
 
 export interface MainThreadFileSystemEventServiceShape extends IDisposable {
-	$watch(extensionId: string, session: number, resource: UriComponents, opts: files.IWatchOptions): void;
+	$watch(extensionId: string, session: number, resource: UriComponents, opts: files.IWatchOptions, correlate: boolean): void;
 	$unwatch(session: number): void;
 }
 

src/vs/workbench/api/common/extHostFileSystemEventService.ts

@@ -18,7 +18,9 @@ import { ILogService } from 'vs/platform/log/common/log';
 import { IExtHostWorkspace } from 'vs/workbench/api/common/extHostWorkspace';
 import { Lazy } from 'vs/base/common/lazy';
 
-interface FileSystemWatcherCreateOptions {
+export interface FileSystemWatcherCreateOptions {
+	readonly correlate: boolean;
+
 	readonly ignoreCreateEvents?: boolean;
 	readonly ignoreChangeEvents?: boolean;
 	readonly ignoreDeleteEvents?: boolean;
@@ -71,9 +73,9 @@ class FileSystemWatcher implements vscode.FileSystemWatcher {
 		const excludeOutOfWorkspaceEvents = typeof globPattern === 'string';
 
 		// 1.84.x introduces new proposed API for a watcher to set exclude
-		// rules. When this is provided, we turn the file watcher into correlation
+		// rules. In these cases, we turn the file watcher into correlation
 		// mode and ignore any event that does not match the correlation ID.
-		const excludeUncorrelatedEvents = Array.isArray(options?.excludes) && options.excludes.length > 0;
+		const excludeUncorrelatedEvents = options?.correlate;
 
 		const subscription = dispatcher(events => {
 			if (typeof events.session === 'number' && events.session !== this.session) {
@@ -110,10 +112,10 @@ class FileSystemWatcher implements vscode.FileSystemWatcher {
 			}
 		});
 
-		this._disposable = Disposable.from(this.ensureWatching(mainContext, extension, globPattern, options), this._onDidCreate, this._onDidChange, this._onDidDelete, subscription);
+		this._disposable = Disposable.from(this.ensureWatching(mainContext, extension, globPattern, options, options?.correlate), this._onDidCreate, this._onDidChange, this._onDidDelete, subscription);
 	}
 
-	private ensureWatching(mainContext: IMainContext, extension: IExtensionDescription, globPattern: string | IRelativePatternDto, options?: FileSystemWatcherCreateOptions): Disposable {
+	private ensureWatching(mainContext: IMainContext, extension: IExtensionDescription, globPattern: string | IRelativePatternDto, options: FileSystemWatcherCreateOptions | undefined, correlate: boolean | undefined): Disposable {
 		const disposable = Disposable.from();
 
 		if (typeof globPattern === 'string') {
@@ -127,7 +129,7 @@ class FileSystemWatcher implements vscode.FileSystemWatcher {
 			recursive = true; // only watch recursively if pattern indicates the need for it
 		}
 
-		proxy.$watch(extension.identifier.value, this.session, globPattern.baseUri, { recursive, excludes: options?.excludes ?? [] });
+		proxy.$watch(extension.identifier.value, this.session, globPattern.baseUri, { recursive, excludes: options?.excludes ?? [] }, Boolean(correlate));
 
 		return Disposable.from({ dispose: () => proxy.$unwatch(this.session) });
 	}

src/vs/workbench/api/test/browser/extHostFileSystemEventService.test.ts

@@ -22,13 +22,13 @@ suite('ExtHostFileSystemEventService', () => {
 			drain: undefined!
 		};
 
-		const watcher1 = new ExtHostFileSystemEventService(protocol, new NullLogService(), undefined!).createFileSystemWatcher(undefined!, undefined!, '**/somethingInteresting', {});
+		const watcher1 = new ExtHostFileSystemEventService(protocol, new NullLogService(), undefined!).createFileSystemWatcher(undefined!, undefined!, '**/somethingInteresting', { correlate: false });
 		assert.strictEqual(watcher1.ignoreChangeEvents, false);
 		assert.strictEqual(watcher1.ignoreCreateEvents, false);
 		assert.strictEqual(watcher1.ignoreDeleteEvents, false);
 		watcher1.dispose();
 
-		const watcher2 = new ExtHostFileSystemEventService(protocol, new NullLogService(), undefined!).createFileSystemWatcher(undefined!, undefined!, '**/somethingBoring', { ignoreCreateEvents: true, ignoreChangeEvents: true, ignoreDeleteEvents: true });
+		const watcher2 = new ExtHostFileSystemEventService(protocol, new NullLogService(), undefined!).createFileSystemWatcher(undefined!, undefined!, '**/somethingBoring', { ignoreCreateEvents: true, ignoreChangeEvents: true, ignoreDeleteEvents: true, correlate: false });
 		assert.strictEqual(watcher2.ignoreChangeEvents, true);
 		assert.strictEqual(watcher2.ignoreCreateEvents, true);
 		assert.strictEqual(watcher2.ignoreDeleteEvents, true);

src/vscode-dts/vscode.proposed.createFileSystemWatcher.d.ts

@@ -33,6 +33,19 @@ declare module 'vscode' {
 
 	export namespace workspace {
 
+		/**
+		 * A variant of {@link workspace.createFileSystemWatcher} that optionally allows to specify
+		 * a set of glob patterns to exclude from watching.
+		 *
+		 * It provides the following advantages over the other {@link workspace.createFileSystemWatcher}
+		 * method:
+		 * - the configured excludes from `files.watcherExclude` setting are NOT applied
+		 * - requests for recursive file watchers inside the opened workspace are NOT ignored
+		 * - the watcher is ONLY notified for events from this request and not from any other watcher
+		 *
+		 * As such, this method is prefered in cases where you want full control over the watcher behavior
+		 * without being impacted by settings or other watchers that are installed.
+		 */
 		export function createFileSystemWatcher(pattern: RelativePattern, options?: FileSystemWatcherOptions): FileSystemWatcher;
 	}
 }