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: `esbuild-loader`
        }]
      }]
    },
    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`,
      // @ts-ignore
      path: path.join(extConfig.context, `out`),
      libraryTarget: `commonjs`,
    },
    // yes, really source maps
    devtool: `source-map`
  };

  return merge(defaultConfig, extConfig);
};