Add support for build status

extensions/typescript/src/protocol.d.ts

@@ -1009,6 +1009,11 @@ export interface DiagnosticEventBody {
       * An array of diagnostic information items.
       */
     diagnostics: Diagnostic[];
+
+    /**
+     * Information about the current length of the build queue.
+     */
+    queueLength?: number;
 }
 
 /**

extensions/typescript/src/typescriptMain.ts

@@ -19,6 +19,9 @@ nls.config({locale: env.language});
 import * as path from 'path';
 
 import * as Proto from './protocol';
+
+import * as Is from './utils/is';
+
 import TypeScriptServiceClient from './typescriptServiceClient';
 import { ITypescriptServiceClientHost } from './typescriptService';
 
@@ -36,6 +39,7 @@ import WorkspaceSymbolProvider from './features/workspaceSymbolProvider';
 
 import * as VersionStatus from './utils/versionStatus';
 import * as ProjectStatus from './utils/projectStatus';
+import * as BuildStatus from './utils/buildStatus';
 
 interface LanguageDescription {
 	id: string;
@@ -83,6 +87,7 @@ export function activate(context: ExtensionContext): void {
 	}, () => {
 		// Nothing to do here. The client did show a message;
 	});
+	BuildStatus.update({ queueLength: 0 });
 }
 
 const validateSetting = 'validate.enable';
@@ -362,6 +367,9 @@ class TypeScriptServiceClientHost implements ITypescriptServiceClientHost {
 				language.semanticDiagnosticsReceived(body.file, this.createMarkerDatas(body.diagnostics, language.diagnosticSource));
 			}
 		}
+		if (Is.defined(body.queueLength)) {
+			BuildStatus.update( { queueLength: body.queueLength });
+		}
 	}
 
 	private createMarkerDatas(diagnostics: Proto.Diagnostic[], source: string): Diagnostic[] {

extensions/typescript/src/typescriptServiceClient.ts

@@ -241,6 +241,12 @@ export default class TypeScriptServiceClient implements ITypescriptServiceClient
 	}
 
 	private serviceStarted(resendModels: boolean): void {
+		if (this.storagePath) {
+			try {
+				fs.mkdirSync(this.storagePath);
+			} catch(error) {
+			}
+		}
 		this.execute('configure', {
 			autoBuild: this.storagePath ? true : false,
 			metaDataDirectory: this.storagePath

extensions/typescript/src/utils/buildStatus.ts

@@ -0,0 +1,23 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import vscode = require('vscode');
+
+const statusItem: vscode.StatusBarItem = vscode.window.createStatusBarItem(vscode.StatusBarAlignment.Left, Number.MIN_VALUE);
+
+export interface BuildInfo {
+	queueLength: number;
+}
+
+export function update(info: BuildInfo): void {
+	if (info.queueLength === 0) {
+		statusItem.hide();
+		return;
+	}
+	statusItem.text = info.queueLength.toString();
+	statusItem.show();
+}