webpack.config.js

/*eslint prefer-template: 0*/
var path = require('path');
var fs = require('fs');

var webpack = require('webpack');

var nodeModules = {};

// This is to filter out node_modules as we don't want them
// to be made part of any bundles.
fs.readdirSync('node_modules')
  .filter(function(x) {
    return ['.bin'].indexOf(x) === -1;
  })
  .forEach(function(mod) {
    nodeModules[mod] = 'commonjs ' + mod;
  });

var rules = [
  {
    exclude: /(node_modules|bower_components)/,
    test: /\.js$/,
    // babel options are in .babelrc
    loaders: ['babel-loader'],
  },
];

if (process.env.COVERAGE === 'y') {
  rules.push({
    test: /\.js$/,
    enforce: 'pre',
    exclude: /(node_modules|bower_components|test)/,
    loaders: 'babel-istanbul-loader',
  });
}

module.exports = {
  entry: './src/main.js',
  target: 'node',
  node: {
    __dirname: true,
    __filename: true,
  },
  output: {
    path: path.join(__dirname, 'dist'),
    filename: 'web-ext.js',
    libraryTarget: 'commonjs2',
  },
  module: {
    rules,
  },
  externals: nodeModules,
  plugins: [
    new webpack.BannerPlugin({
      banner: 'require("source-map-support").install();',
      raw: true,
      entryOnly: false,
    }),
    // This seems necessary to work with the 'when' module, which is
    // required by some things such as fx-runner.
    new webpack.IgnorePlugin(/vertx/),
    // Global variables are necessary to print either verson number or
    // git commit information for custom builds
    new webpack.DefinePlugin({
      WEBEXT_BUILD_ENV: JSON.stringify(process.env.NODE_ENV || 'development'),
    }),
  ],
  resolve: {
    extensions: ['.js', '.json'],
    modules: [
      path.join(__dirname, 'src'),
      path.resolve(__dirname, 'node_modules'),
    ],
  },
  devtool: 'sourcemap',
};