shared.webpack.config.js

/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

//@ts-check
/** @typedef {import('webpack').Configuration} WebpackConfig **/

"use strict";

const path = require("path");
const merge = require("merge-options");

module.exports = function withDefaults(/**@type WebpackConfig*/ extConfig) {
	/** @type WebpackConfig */
	let defaultConfig = {
		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
		node: {
			__dirname: false, // leave the __dirname-behaviour intact
		},
		resolve: {
			mainFields: ["module", "main"],
			extensions: [".ts", ".js"], // support ts-files and js-files
		},
		module: {
			rules: [
				{
					test: /\.ts$/,
					exclude: /node_modules/,
					use: [
						{
							// configure TypeScript loader:
							// * enable sources maps for end-to-end source maps
							loader: "ts-loader",
							options: {
								compilerOptions: {
									sourceMap: true,
								},
							},
						},
					],
				},
			],
		},
		externals: {
			vscode: "commonjs vscode", // ignored because it doesn't exist
		},
		output: {
			// all output goes into `dist`.
			// packaging depends on that and this must always be like it
			filename: "[name].js",
			path: path.join(extConfig.context, "out"),
			libraryTarget: "commonjs",
		},
		// yes, really source maps
		devtool: "source-map",
	};

	return merge(defaultConfig, extConfig);
};