add a shared webpack conifg

extensions/shared.webpack.config.js

@@ -0,0 +1,52 @@
+/*---------------------------------------------------------------------------------------------
+ *  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 path = require('path');
+
+/**
+ * Function that must be invoked with __dirname and that
+ * returns a good default configuation for extensions that
+ * want to do webpack
+ */
+module.exports = function (extensionDir) {
+	return {
+		context: extensionDir,
+		mode: 'none', // this leaves the source code as close as possible to the original (when packaging we set this to 'production')
+		target: 'node', // extensions run in a node context
+		resolve: {
+			mainFields: ['main'], // prefer the main-entry of package.json files
+			extensions: [".ts", ".js"] // support ts-files and js-files
+		},
+		module: {
+			rules: [{
+				// configure TypeScript loader:
+				// * only transpile because we have a separate compilation pipeline
+				// * enable sources maps for end-to-end source maps
+				test: /\.ts$/,
+				exclude: /node_modules/,
+				use: [{
+					loader: 'ts-loader',
+					options: {
+						transpileOnly: true,
+						compilerOptions: {
+							"sourceMap": true,
+						}
+					}
+				}]
+			}]
+		},
+		output: {
+			// all output goes into `dist`.
+			// packaging depends on that and this must always be like it
+			filename: '[name].js',
+			path: path.join(extensionDir, 'dist'),
+			libraryTarget: "commonjs",
+		},
+		// yes, really source maps
+		devtool: 'source-map'
+	};
+};