add typings to support Promise#finally

src/typings/lib.es2018.promise.d.ts

@@ -0,0 +1,27 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http:https://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+/**
+ * Represents the completion of an asynchronous operation
+ */
+interface Promise<T> {
+ /**
+ * Attaches a callback that is invoked when the Promise is settled (fulfilled or rejected). The
+ * resolved value cannot be modified from the callback.
+ * @param onfinally The callback to execute when the Promise is settled (fulfilled or rejected).
+ * @returns A Promise for the completion of the callback.
+ */
+ finally(onfinally?: (() => void) | undefined | null): Promise<T>;
+}

src/vs/base/common/async.ts

@@ -44,6 +44,9 @@ export function createCancelablePromise<T>(callback: (token: CancellationToken)
  catch<TResult = never>(reject?: ((reason: any) => TResult | Promise<TResult>) | undefined | null): Promise<T | TResult> {
  return this.then(undefined, reject);
  }
+ finally(onfinally?: (() => void) | undefined | null): Promise<T> {
+ return this.finally(onfinally);
+ }
  };
 }
 

src/vs/workbench/api/node/extHostSearch.fileIndex.ts

@@ -576,6 +576,9 @@ export class FileIndexSearchManager {
  catch(reject?) {
  return this.then(undefined, reject);
  }
+ finally(onFinally) {
+ return promise.finally(onFinally);
+ }
  };
  }
 }

src/vs/workbench/services/extensions/node/lazyPromise.ts

@@ -82,4 +82,8 @@ export class LazyPromise implements Promise<any> {
  public catch(error: any): any {
  return this._ensureActual().then(undefined, error);
  }
+
+ public finally(callback): any {
+ return this._ensureActual().finally(callback);
+ }
 }

src/vs/workbench/services/search/node/rawSearchService.ts

@@ -394,6 +394,9 @@ export class SearchService implements IRawSearchService {
  catch(reject?) {
  return this.then(undefined, reject);
  }
+ finally(onFinally) {
+ return promise.finally(onFinally);
+ }
  };
  }
 }