Brocfile.js

'use strict';
/* jshint node:true, undef:true, unused:true */
const Rollup = require('broccoli-rollup');
const Babel = require('broccoli-babel-transpiler');
const merge = require('broccoli-merge-trees');
const funnel = require('broccoli-funnel');
const uglify = require('broccoli-uglify-js');
const version = require('git-repo-version');
const watchify = require('broccoli-watchify');
const concat = require('broccoli-concat');
const stew = require('broccoli-stew');

const env = stew.env;
const map = stew.map;

const lib = funnel('lib', { destDir: 'lib' });

const testDir = funnel('test', { destDir: 'test' });
const testFiles = funnel('test', {
  files: ['index.html','worker.js'],
  destDir: 'test'
});

const mocha = funnel('node_modules/mocha', {
  files: ['mocha.css','mocha.js'],
  destDir: 'test'
});

const es5 = new Babel(lib, {
  plugins: [
    'transform-es2015-arrow-functions',
    'transform-es2015-computed-properties',
    'transform-es2015-shorthand-properties',
    'transform-es2015-template-literals',
    'transform-es2015-parameters',
    'transform-es2015-destructuring',
    'transform-es2015-spread',
    'transform-es2015-block-scoping',
    'transform-es2015-constants',
    ['transform-es2015-classes', { loose: true }],
    'babel6-plugin-strip-class-callcheck'
  ]
});

// build RSVP itself
const rsvp = new Rollup(es5, {
  rollup: {
    input: 'lib/rsvp.js',
    output: [
      {
        format: 'umd',
        name: 'RSVP',
        file: 'rsvp.js',
        sourcemap: 'inline'
      },
      {
        format: 'es',
        file: 'rsvp.es.js',
        sourcemap: 'inline'
      }
    ]
  }
});

const rsvpES6 = new Rollup(lib, {
  rollup: {
    input: 'lib/rsvp.js',
    output: [
      {
        format: 'es',
        file: 'es6/rsvp.es.js',
        sourcemap: 'inline'
      }
    ]
  }
});

const testBundle = watchify(merge([
  funnel(rsvp, { destDir: 'test' }),
  testDir
]), {
  browserify: { debug: true, entries: ['./test/index.js'] }
});

const header = map(
  funnel('config', { files: ['versionTemplate.txt'], destDir: 'config' }),
  content => content.replace(/VERSION_PLACEHOLDER_STRING/, version())
);

function concatAs(tree, outputFile) {
  return concat(merge([tree, header]), {
    headerFiles: ['config/versionTemplate.txt'],
    inputFiles: ['rsvp.js'],
    outputFile: outputFile
  });
}

function production(dist, header) {
  let result;
  env('production', () => {
    result = uglify(concatAs(dist, 'rsvp.min.js'), {
      compress: {
        negate_iife: false,
        sequences: false
      },
      mangle: true
    });
  })
  return result;
}

function development(dist, header) {
  return concatAs(dist, 'rsvp.js');
}

module.exports = merge([
  merge([
    production(rsvp, header),
    development(rsvp, header),
    concat(merge([rsvp, header]), {
      headerFiles: ['config/versionTemplate.txt'],
      inputFiles: ['rsvp.es.js'],
      outputFile: 'rsvp.es.js'
    }),
    concat(merge([rsvpES6, header]), {
      headerFiles: ['config/versionTemplate.txt'],
      inputFiles: ['es6/rsvp.es.js'],
      outputFile: 'es6/rsvp.es.js'
    })
  ].filter(Boolean)),
  // test stuff
  testFiles,
  mocha,
  funnel(testBundle, { destDir: 'test' })
]);