webpack.config.js

'use strict'

var path = require('path')
var args = require('minimist')(process.argv.slice(2))
var _ = require('lodash')

// List of allowed environments
var allowedEnvs = ['dev', 'dist', 'test']

// Set the correct environment
var env
if (args._.length > 0 && args._.indexOf('start') !== -1) {
  env = 'test'
} else if (args.env) {
  env = args.env
} else {
  env = 'dev'
}
process.env.REACT_WEBPACK_ENV = env

// Get available configurations
var configs = {
  base: require(path.join(__dirname, 'cfg/base')),
  dev: require(path.join(__dirname, 'cfg/dev')),
  dist: require(path.join(__dirname, 'cfg/dist')),
  test: require(path.join(__dirname, 'cfg/test'))
}

/**
 * Get an allowed environment
 * @param  {String}  env
 * @return {String}
 */
function getValidEnv(env) {
  var isValid = env && env.length > 0 && allowedEnvs.indexOf(env) !== -1
  return isValid ? env : 'dev'
}

/**
 * Build the webpack configuration
 * @param  {String} env Environment to use
 * @return {Object} Webpack config
 */
function buildConfig(env) {
  var usedEnv = getValidEnv(env)
  return _.mergeWith(configs['base'], configs[usedEnv], function (objValue, srcValue) {
    if (_.isArray(objValue)) {
      return objValue.concat(srcValue)
    }
  })
}

module.exports = buildConfig(env)