webpack.config.js

const webpack = require('webpack');
const ejs = require('ejs');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const ExtensionReloader = require('webpack-extension-reloader');
const { version } = require('./package.json');
const path = require('path');
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
const wextManifest = require('wext-manifest');
const WriteWebpackPlugin = require('write-webpack-plugin');
const manifestInput = require('./src/manifest');

const targetBrowser = process.env.TARGET_BROWSER;
const manifest = wextManifest[targetBrowser](manifestInput);

const config = {
  mode: process.env.NODE_ENV,
  context: `${__dirname}/src`,
  entry: {
    'background': './background_script/index.js',
    'content_script': './content_script/index.js',
    // 'popup/popup': './popup/popup.js',
    // 'options/options': './options/options.js',
  },
  output: {
    path: path.join(__dirname, 'dist', targetBrowser),
    filename: '[name].js',

    // path: __dirname + '/dist',
    // filename: '[name].js',
  },
  resolve: {
    extensions: ['.js'],
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        loader: 'eslint-loader',
        options: {
          configFile: '.eslintrc.js',
          // eslint options (if necessary)
        },
      },
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader'],
      },
      {
        test: /\.scss$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader'],
      },
      {
        test: /\.sass$/,
        use: [MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader?indentedSyntax'],
      },
      {
        test: /\.txt$/i,
        use: 'raw-loader',
      },
      {
        test: /\.(png|jpg|jpeg|gif|svg|ico)$/,
        loader: 'file-loader',
        options: {
          name: '[name].[ext]',
          outputPath: '/images/',
          emitFile: false,
        },
      },
      {
        test: /\.(woff(2)?|ttf|eot|svg)(\?v=\d+\.\d+\.\d+)?$/,
        loader: 'file-loader',
        options: {
          name: '[name].[ext]',
          outputPath: '/fonts/',
          emitFile: false,
        },
      },
    ],
  },
  plugins: [
    new webpack.DefinePlugin({
      global: 'window',
    }),
    new WriteWebpackPlugin([{ name: manifest.name, data: Buffer.from(manifest.content) }]),
    new MiniCssExtractPlugin({
      filename: '[name].css',
    }),
    new CopyWebpackPlugin({
      patterns: [
        { from: '_locales', to: '_locales' },
        { from: 'icons', to: 'icons', globOptions: { ignore: ['icon.xcf', '.DS_Store'] } },
        { from: 'images', to: 'images', globOptions: { ignore: ['.DS_Store'] } },
      ],
    }),
  ],
};

if (config.mode === 'production') {
  config.plugins = (config.plugins || []).concat([
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: '"production"',
      },
    }),
    new BundleAnalyzerPlugin({
      analyzerMode: 'disabled',
      generateStatsFile: true,
      statsOptions: { source: false },
    }),
  ]);
}

if (process.env.HMR === 'true') {
  config.plugins = (config.plugins || []).concat([
    new ExtensionReloader({
      manifest: `${__dirname}/dist/${process.env.TARGET_BROWSER}/manifest.json`,
    }),
  ]);
}

function transformHtml(content) {
  return ejs.render(content.toString(), {
    ...process.env,
  });
}

module.exports = config;