share TypeScipt node_module amongst extensions

extensions/postinstall.js

@@ -0,0 +1,34 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+
+function removeFile(filePath) {
+	try {
+		fs.unlinkSync(filePath);
+		console.log(`removed '${filePath}'`);
+	} catch (e) {
+		console.warn(e);
+	}
+}
+
+// delete unused typescript stuff in lib folder
+const libPath = path.dirname(require.resolve('typescript'));
+for (let name of fs.readdirSync(libPath)) {
+	if (name !== 'typescript.d.ts' && name !== 'typescript.js' && name !== 'lib.es6.d.ts') {
+		removeFile(path.join(libPath, name));
+	}
+}
+
+// delete unused typescript stuff in bin folder
+const binPath = path.join(path.dirname(libPath), 'bin');
+for (let name of fs.readdirSync(binPath)) {
+	removeFile(path.join(binPath, name));
+}
+
+removeFile(path.join(path.dirname(libPath), 'Gulpfile.ts'));