webpack.config.js

import webpack from 'webpack';
import { fileURLToPath } from 'url';
import path, { dirname } from 'path';
import fileSystem from 'fs-extra';
import env from './utils/env.js';
import CopyWebpackPlugin from 'copy-webpack-plugin';
import HtmlWebpackPlugin from 'html-webpack-plugin';
import TerserPlugin from 'terser-webpack-plugin';
import { CleanWebpackPlugin } from 'clean-webpack-plugin';

const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);

const ASSET_PATH = process.env.ASSET_PATH || '/';

// load the secrets
const secretsPath = path.join(__dirname, 'secrets.' + env.NODE_ENV + '.js');

const fileExtensions = ['jpg', 'jpeg', 'png', 'gif', 'eot', 'otf', 'svg', 'ttf', 'woff', 'woff2'];

const alias = {};

if (fileSystem.existsSync(secretsPath)) {
  alias['secrets'] = secretsPath;
}

let options = {
  mode: process.env.NODE_ENV || 'development',
  entry: {
    background: path.join(__dirname, 'src', 'pages', 'Background', 'index.js'),
    contentScript: path.join(__dirname, 'src', 'pages', 'ContentScripts', 'index.js'),
    devtools: path.join(__dirname, 'src', 'pages', 'Devtools', 'index.js'),
    panel: path.join(__dirname, 'src', 'pages', 'Panel', 'index.jsx'),
  },
  // "custom" is not a standard key of webpack options
  // it will be consumed by utils/server.js and must be deleted before webpack(config)
  custom: {
    notHMR: ['background', 'contentScript'],
    enableBackgroundAutoReload: true, // always true when "enableContentScriptsAutoReload" is set true
    enableContentScriptsAutoReload: true,
  },
  output: {
    filename: '[name].bundle.js',
    path: path.resolve(__dirname, 'build'),
    clean: true,
    publicPath: ASSET_PATH,
  },
  module: {
    rules: [
      {
        // look for .css or .scss files
        test: /\.(css|scss)$/,
        // in the `src` directory
        use: [
          {
            loader: 'style-loader',
          },
          {
            loader: 'css-loader',
          },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: true,
            },
          },
        ],
      },
      {
        test: new RegExp('.(' + fileExtensions.join('|') + ')$'),
        type: 'asset/resource',
        exclude: /node_modules/,
      },
      {
        test: /\.html$/,
        loader: 'html-loader',
        exclude: /node_modules/,
      },
      { test: /\.(ts|tsx)$/, loader: 'ts-loader', exclude: /node_modules/ },
      {
        test: /\.(js|jsx)$/,
        use: [
          {
            loader: 'source-map-loader',
          },
          {
            loader: 'babel-loader',
          },
        ],
        exclude: /node_modules/,
      },
    ],
  },
  resolve: {
    alias: alias,
    extensions: fileExtensions.map((extension) => '.' + extension).concat(['.js', '.jsx', '.ts', '.tsx', '.css']),
  },
  plugins: [
    new CleanWebpackPlugin({ verbose: false }),
    new webpack.ProgressPlugin(),
    // expose and write the allowed env vars on the compiled bundle
    new webpack.EnvironmentPlugin(['NODE_ENV']),
    new CopyWebpackPlugin({
      patterns: [
        {
          from: 'src/manifest.json',
          to: path.join(__dirname, 'build'),
          force: true,
          transform: function (content, path) {
            // generates the manifest file using the package.json informations
            return Buffer.from(
              JSON.stringify({
                description: process.env.npm_package_description,
                version: process.env.npm_package_version,
                ...JSON.parse(content.toString()),
              }),
            );
          },
        },
      ],
    }),
    new CopyWebpackPlugin({
      patterns: [
        {
          from: 'src/pages/ContentScripts/content.styles.css',
          to: path.join(__dirname, 'build'),
          force: true,
        },
      ],
    }),
    new CopyWebpackPlugin({
      patterns: [
        {
          from: 'src/assets/logo.png',
          to: path.join(__dirname, 'build'),
          force: true,
        },
      ],
    }),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'pages', 'Devtools', 'index.html'),
      filename: 'devtools.html',
      chunks: ['devtools'],
      cache: false,
    }),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'pages', 'Panel', 'index.html'),
      filename: 'panel.html',
      chunks: ['panel'],
      cache: false,
    }),
  ],
  infrastructureLogging: {
    level: 'info',
  },
};

if (env.NODE_ENV === 'development') {
  options.devtool = 'cheap-module-source-map';
} else {
  options.optimization = {
    minimize: true,
    minimizer: [
      new TerserPlugin({
        extractComments: false,
      }),
    ],
  };
}

export default options;