Delete vscode-typescript upon close of VS Code (#73801)

* Cleans up vs-typescript temp directoy upon VS code close

* Fixed typing errors preventing build from succeeding

* Moved deletion to the deactivate method. Added folders per extension host

* Removed yarn watch script used in testing

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

@@ -10,6 +10,8 @@ import { LanguageConfigurationManager } from './features/languageConfiguration';
 import TypeScriptTaskProviderManager from './features/task';
 import TypeScriptServiceClientHost from './typeScriptServiceClientHost';
 import { flatten } from './utils/arrays';
+import * as electron from './utils/electron';
+import * as rimraf from 'rimraf';
 import { CommandManager } from './utils/commandManager';
 import * as fileSchemes from './utils/fileSchemes';
 import { standardLanguageDescriptions } from './utils/languageDescription';
@@ -128,4 +130,8 @@ function isSupportedDocument(
 		return false;
 	}
 	return fileSchemes.isSupportedScheme(document.uri.scheme);
+}
+
+export function deactivate() {
+	rimraf.sync(electron.getInstanceDir());
 }

extensions/typescript-language-features/src/typings/ref.d.ts

@@ -5,4 +5,3 @@
 
 /// <reference path='../../../../src/vs/vscode.d.ts'/>
 /// <reference path='../../../../src/vs/vscode.proposed.d.ts'/>
-/// <reference types='@types/node'/>

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

@@ -22,8 +22,21 @@ const getRootTempDir = (() => {
 	};
 })();
 
+export const getInstanceDir = (() => {
+	let dir: string | undefined;
+	return () => {
+		if (!dir) {
+			dir = path.join(getRootTempDir(), temp.makeRandomHexString(20));
+		}
+		if (!fs.existsSync(dir)) {
+			fs.mkdirSync(dir);
+		}
+		return dir;
+	};
+})();
+
 export function getTempFile(prefix: string): string {
-	return path.join(getRootTempDir(), `${prefix}-${temp.makeRandomHexString(20)}.tmp`);
+	return path.join(getInstanceDir(), `${prefix}-${temp.makeRandomHexString(20)}.tmp`);
 }
 
 function generatePatchedEnv(env: any, modulePath: string): any {