webpack.config.js

const path = require('path');
const decompress = require('decompress');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const CleanWebpackPlugin = require('clean-webpack-plugin');

if (process.env.NODE_ENV == null) {
  process.env.NODE_ENV = 'development';
}
const ENV = process.env.ENV = process.env.NODE_ENV;

let plugins = [
  new CleanWebpackPlugin([
    path.resolve(__dirname, 'build/*'),
  ]),
  new CopyWebpackPlugin([
    { from: './src/_locales/', to: '_locales', ignore: ['default-messages.json'], },
    { from: './src/icons', to: 'icons' },
    { from: './src/ui', to: 'ui', ignore: ['code/*', '*.zip'] },
  ])
];

const unzipPromise = decompress('src/ui/js/libs-unzip-before-build.zip', 'src/ui/js/');

module.exports = function (args) {

  let browserType = args["browser"] || "chrome";
  let isDev = args["dev"] || false;
  let coreIsServiceWorker = args["service_worker"] || false;
  plugins.push(new CopyWebpackPlugin([{ from: `./src/manifest-${browserType}.json`, to: 'manifest.json' }]));

  let codeEntries = {
    'core': [],
    'ui/code/popup': ['./src/ui/code/popup.ts', `./src/core/browsers/${browserType}.ts`],
    'ui/code/proxyable': ['./src/ui/code/proxyable.ts', `./src/core/browsers/${browserType}.ts`],
    'ui/code/settingsPage': ['./src/ui/code/settingsPage.ts', `./src/core/browsers/${browserType}.ts`],
  };
  if (coreIsServiceWorker) {
    codeEntries["core"] = [`./src/core/browsers/${browserType}.ts`, './src/core/ServiceWorker/CoreServiceWorker.ts']
  }
  else {
    codeEntries["core"] = [`./src/core/browsers/${browserType}.ts`, './src/core/Core.ts',]
  }

  return unzipPromise.then(() => {
    return {
      mode: ENV,
      entry: codeEntries,
      devtool: '',
      // devtool: 'inline-source-map',
      module: {
        rules: [
          {
            test: /\.tsx?$/,
            use: 'ts-loader',
            exclude: /node_modules/
          }
        ]
      },
      resolve: {
        extensions: ['.ts', '.js']
      },
      output: {
        filename: '[name].js',
        path: path.resolve(__dirname, 'build' + (isDev ? '-' + browserType : '')),
      },
      optimization: {
        minimize: !isDev
      },
      plugins: plugins
    }
  });
};