const webpack = require('webpack');
const webpackMerge = require('webpack-merge');
const baseConfig = require('./webpack.config.js');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');

module.exports = function(env) {
  return webpackMerge(baseConfig, {
    devtool: 'cheap-module-source-map',

    plugins: [
      new webpack.LoaderOptionsPlugin({
        minimize: true,
        debug: false,
      }),
      new webpack.DefinePlugin({
        'process.env': {
          'NODE_ENV': JSON.stringify('production'),
        },
      }),
      new UglifyJsPlugin(),
    ]
  });
}