webpack.config.js

const webpack = require('webpack')
const path = require('path')
const fileSystem = require('fs')
const env = require('./utils/env')
const CleanWebpackPlugin = require('clean-webpack-plugin')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const WriteFilePlugin = require('write-file-webpack-plugin')
const Dotenv = require('dotenv-webpack')

// load the secrets
const alias = {}

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

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

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

const options = {
  mode: process.env.NODE_ENV || 'development',
  entry: {
    popup: path.join(__dirname, 'src', 'ts', 'popup.ts'),
    options: path.join(__dirname, 'src', 'ts', 'options.ts'),
    background: path.join(__dirname, 'src', 'ts', 'background.ts')
  },
  output: {
    path: path.join(__dirname, 'build'),
    filename: '[name].bundle.js'
  },
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        use: 'ts-loader',
        exclude: /node_modules/
      },
      {
        test: /\.(scss)$/,
        use: [
          {
            loader: 'style-loader'
          },
          {
            loader: 'css-loader'
          },
          {
            loader: 'postcss-loader',
            options: {
              plugins: function () { // post css plugins, can be exported to postcss.config.js
                return [
                  require('precss'),
                  require('autoprefixer')
                ]
              }
            }
          },
          {
            loader: 'sass-loader' // compiles Sass to CSS
          }
        ]
      },
      {
        test: new RegExp('\.(' + fileExtensions.join('|') + ')$'), // eslint-disable-line no-useless-escape
        loader: 'file-loader?name=[name].[ext]',
        exclude: /node_modules/
      },
      {
        test: /\.html$/,
        loader: 'html-loader',
        exclude: /node_modules/
      }
    ]
  },
  resolve: {
    alias: alias,
    extensions: ['.tsx', '.ts', '.js']
  },
  plugins: [
    // clean the build folder
    new CleanWebpackPlugin(['build']),
    // expose and write the allowed env vars on the compiled bundle
    new webpack.EnvironmentPlugin(['NODE_ENV']),
    new Dotenv(),
    new CopyWebpackPlugin({
      patterns: [{
        from: 'src/manifest.json',
        transform: function (content, path) {
          // generates the manifest file using the package.json informations
          return Buffer.from(JSON.stringify({
            ...JSON.parse(content.toString()),
            description: process.env.npm_package_description,
            version: process.env.npm_package_version
          }))
        }
      }]
    }),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'popup.html'),
      filename: 'popup.html',
      chunks: ['popup']
    }),
    new HtmlWebpackPlugin({
      template: path.join(__dirname, 'src', 'options.html'),
      filename: 'options.html',
      chunks: ['options']
    }),
    new WriteFilePlugin()
  ],
  node: {
    fs: 'empty'
  }
}

if (env.NODE_ENV === 'development') {
  options.devtool = 'inline-source-map'
}

module.exports = options