webpack.config.js

// Modules
const webpack = require('webpack');
const autoprefixer = require('autoprefixer');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const NgAnnotatePlugin = require('ng-annotate-webpack-plugin');
const GhPagesWebpackPlugin = require('gh-pages-webpack-plugin');
const path = require('path');

/**
 * Env
 * Get npm lifecycle event to identify the environment
 */
const ENV = process.env.npm_lifecycle_event;
const isTest = ENV === 'test' || ENV === 'test-watch';
const isProd = ENV === 'build';

module.exports = (function makeWebpackConfig() {
  /**
   * Config
   * Reference: http://webpack.github.io/docs/configuration.html
   * This is the object where all configuration gets set
   */
  const config = {};

  /**
   * Entry
   * Reference: http://webpack.github.io/docs/configuration.html#entry
   * Should be an empty object if it's generating a test build
   * Karma will set this when it's a test build
   */
  config.entry = isTest ? {} : {
    app: './examples/default/app/app.js',
    'imhere-angular-wizard': './src/components/index.js',
  };

  /**
   * Output
   * Reference: http://webpack.github.io/docs/configuration.html#output
   * Should be an empty object if it's generating a test build
   * Karma will handle setting it up for you when it's a test build
   */
  config.output = isTest ? {} : {
    // Absolute output directory
    path: path.resolve(__dirname, './dist'),

    // Output path from the view of the page
    // Uses webpack-dev-server in development
    publicPath: isProd ? 'https://imheretw.github.io/imhere-angular-wizard/' : 'http://localhost:8080/',

    // Filename for entry points
    // Only adds hash in build mode
    filename: isProd ? '[name].js' : '[name].bundle.js',

    // Filename for non-entry points
    // Only adds hash in build mode
    chunkFilename: isProd ? '[name].js' : '[name].bundle.js',
  };

  config.resolve = {
    alias: {
      app: path.resolve(__dirname, 'examples/default/app/'),
      'imhere-angular-wizard': path.resolve(__dirname, 'src/components/'),
    },
  };

  /**
   * Devtool
   * Reference: http://webpack.github.io/docs/configuration.html#devtool
   * Type of sourcemap to use per build type
   */
  if (isTest) {
    config.devtool = 'inline-source-map';
  } else if (isProd) {
    config.devtool = 'source-map';
  } else {
    config.devtool = 'eval-source-map';
  }

  /**
   * Loaders
   * Reference: http://webpack.github.io/docs/configuration.html#module-loaders
   * List: http://webpack.github.io/docs/list-of-loaders.html
   * This handles most of the magic responsible for converting modules
   */

  // Initialize module
  config.module = {
    rules: [{
      // JS LOADER
      // Reference: https://github.com/babel/babel-loader
      // Transpile .js files using babel-loader
      // Compiles ES6 and ES7 into ES5 code
      test: /\.js$/,
      loader: 'babel-loader',
      exclude: /node_modules/,
    }, {
      // CSS LOADER
      // Reference: https://github.com/webpack/css-loader
      // Allow loading css through js
      //
      // Reference: https://github.com/postcss/postcss-loader
      // Postprocess your css with PostCSS plugins
      test: /\.css$/,
      // Reference: https://github.com/webpack/extract-text-webpack-plugin
      // Extract css files in production builds
      //
      // Reference: https://github.com/webpack/style-loader
      // Use style-loader in development.

      loader: isTest ? 'null-loader' : ExtractTextPlugin.extract({
        fallbackLoader: 'style-loader',
        loader: [
          { loader: 'css-loader', query: { sourceMap: true } },
          { loader: 'postcss-loader' },
        ],
      }),
    }, {
      // ASSET LOADER
      // Reference: https://github.com/webpack/file-loader
      // Copy png, jpg, jpeg, gif, svg, woff, woff2, ttf, eot files to output
      // Rename the file using the asset hash
      // Pass along the updated reference to your code
      // You can add here any file extension you want to get copied to your output
      test: /\.(png|jpg|jpeg|gif|svg|woff|woff2|ttf|eot)$/,
      loader: 'file-loader',
    }, {
      // HTML LOADER
      // Reference: https://github.com/webpack/raw-loader
      // Allow loading html through js
      test: /\.html$/,
      loader: 'raw-loader',
    }],
  };

  // ISTANBUL LOADER
  // https://github.com/deepsweet/istanbul-instrumenter-loader
  // Instrument JS files with istanbul-lib-instrument for subsequent code coverage reporting
  // Skips node_modules and files that end with .spec.js
  if (isTest) {
    config.module.rules.push({
      enforce: 'pre',
      test: /\.js$/,
      exclude: [
        /node_modules/,
        /\.spec\.js$/,
      ],
      loader: 'istanbul-instrumenter-loader',
      query: {
        esModules: true,
      },
    });
  }

  /**
   * PostCSS
   * Reference: https://github.com/postcss/autoprefixer-core
   * Add vendor prefixes to your css
   */
   // NOTE: This is now handled in the `postcss.config.js`
   //       webpack2 has some issues, making the config file necessary

  /**
   * Plugins
   * Reference: http://webpack.github.io/docs/configuration.html#plugins
   * List: http://webpack.github.io/docs/list-of-plugins.html
   */
  config.plugins = [
    new webpack.LoaderOptionsPlugin({
      test: /\.scss$/i,
      options: {
        postcss: {
          plugins: [autoprefixer],
        },
      },
    }),
    new NgAnnotatePlugin({
      add: true,
      // other ng-annotate options here
    }),
  ];

  // Skip rendering index.html in test mode
  if (!isTest) {
    // Reference: https://github.com/ampedandwired/html-webpack-plugin
    // Render index.html
    config.plugins.push(
      new HtmlWebpackPlugin({
        template: './examples/default/index.html',
        inject: 'body',
      }),

      // Reference: https://github.com/webpack/extract-text-webpack-plugin
      // Extract css files
      // Disabled when in test mode or not in build mode
      new ExtractTextPlugin({ filename: 'css/[name].css', disable: !isProd, allChunks: true })
    );
  }

  // Add build specific plugins
  if (isProd) {
    config.plugins.push(
      // Reference: http://webpack.github.io/docs/list-of-plugins.html#noerrorsplugin
      // Only emit files when there are no errors
      new webpack.NoErrorsPlugin(),

      // Reference: http://webpack.github.io/docs/list-of-plugins.html#dedupeplugin
      // Dedupe modules in the output
      new webpack.optimize.DedupePlugin(),

      // Reference: http://webpack.github.io/docs/list-of-plugins.html#uglifyjsplugin
      // Minify all javascript, switch loaders to minimizing mode
      new webpack.optimize.UglifyJsPlugin(),

      new GhPagesWebpackPlugin({
        path: './dist',
        options: {
          message: 'Update Home Page',
          user: {
            name: 'imhere',
            email: 'imhere.in.tw@gmail.com',
          },
        },
      }),

      // Copy assets from the public folder
      // Reference: https://github.com/kevlened/copy-webpack-plugin
      new CopyWebpackPlugin([{
        from: path.resolve(__dirname, './examples/default'),
      }])
    );
  }

  /**
   * Dev server configuration
   * Reference: http://webpack.github.io/docs/configuration.html#devserver
   * Reference: http://webpack.github.io/docs/webpack-dev-server.html
   */
  config.devServer = {
    contentBase: './examples/default',
    stats: 'minimal',
  };

  return config;
}());