webpack.config.js

const path = require('path')
const webpack = require('webpack')
const merge = require('webpack-merge')
const WebpackBabelExternalsPlugin = require('webpack-babel-external-helpers-2')
const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin

const UglifyJSPlugin = require('uglifyjs-webpack-plugin')
const ExtractTextPlugin = require('extract-text-webpack-plugin')


const modeProd = process.env.NODE_ENV === 'prod'


const extractCSS = new ExtractTextPlugin('css/olimp.css')
const extractSTYLUS = new ExtractTextPlugin('css/olimp-stylus.css')

const dev = {
  entry: {
    olimp: './src/index.jsx',
  },
  output: {
    path: path.resolve(__dirname, 'public'),
    filename: '[name].js',
    library: '[name]',
  },
  devtool: 'cheap-module-eval-source-map',
  watch: true,
  devServer: {
    contentBase: path.join(__dirname, 'public'),
    publicPath: '/',
    watchContentBase: true,
    historyApiFallback: {
      from: /\/\w/,
      to: '/',
    },
    host: '0.0.0.0',
    port: 3000,
  },
}

const prod = {
  entry: {
    'olimp-prod': './src/index.jsx',
  },
  output: {
    path: path.resolve(__dirname, 'public'),
    filename: '[name].js',
  },
  plugins: [
    new webpack.DefinePlugin({
      'process.env': {
        NODE_ENV: JSON.stringify('production'),
      },
    }),
    // new WebpackBabelExternalsPlugin(),
    new UglifyJSPlugin(),
  ],
}

const analyze = merge(prod, {
  plugins: [
    new BundleAnalyzerPlugin(),
  ],
})

const common = {
  context: __dirname,
  resolve: {
    extensions: ['.js', '.jsx'],
  },
  target: 'web',
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        include: [
          path.resolve(__dirname, './src'),
        ],
        loader: 'babel-loader',
        options: {
          presets: ['es2015', 'react', 'flow'],
          plugins: [
            'transform-runtime',
            // 'transform-regenerator',
            'transform-async-to-generator',
            'transform-class-properties',
            'transform-object-rest-spread',
            'lodash',
          ],
        },
      },
      {
        test: /\.(png|jpg|svg)$/,
        loader: 'file-loader',
        include: /img/,
        options: {
          context: __dirname,
          name: modeProd
            ? 'img/[name].[ext]'
            : '[path][name].[ext]',
        },
      },
      {
        test: /\.(eot|svg|ttf|woff|woff2)$/,
        loader: 'file-loader',
        include: /fonts/,
        options: {
          context: __dirname,
          name: modeProd
            ? 'fonts/[name].[ext]'
            : '[path][name].[ext]',
        },
      },
      {
        test: /\.css$/,
        include: [
          path.join(__dirname, './src'),
          /olimp-ui/,
        ],
        use: extractCSS.extract(['css-loader']),
      },
      {
        test: /\.styl$/,
        include: path.join(__dirname, './src'),
        use: extractSTYLUS.extract([
          'css-loader',
          'stylus-loader',
        ]),
      },
    ],
  },
  plugins: [
    extractCSS,
    extractSTYLUS,
  ],
}

function mode(type) {
  switch (type) {
    case 'dev':
      return merge(dev, common)
    case 'prod':
      return merge(prod, common)
    case 'analyze':
      return merge(analyze, common)
    default:
      return merge(dev, common)
  }
}


module.exports = mode(process.env.NODE_ENV)