build.js

/**
 * brightwheel
 *
 * Copyright © 2016 Allen Smith <loranallensmith@github.com>. All rights reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE.txt file in the root directory of this source tree.
 */

'use strict';

const fs = require('fs');
const del = require('del');
const rollup = require('rollup');
const babel = require('rollup-plugin-babel');
const pkg = require('../package.json');

let promise = Promise.resolve();

// Clean up the output directory
promise = promise.then(() => del(['dist/*']));

// Compile source code into a distributable format with Babel
for (const format of ['es6', 'cjs', 'umd', 'iife', 'amd']) {
  promise = promise.then(() => rollup.rollup({
    entry: 'src/index.js',
    external: Object.keys(pkg.dependencies),
    plugins: [babel(Object.assign(pkg.babel, {
      babelrc: false,
      exclude: 'node_modules/**',
      runtimeHelpers: true,
      presets: pkg.babel.presets.map(x => (x === 'es2015' ? 'es2015-rollup' : x)),
    }))],
  }).then(bundle => bundle.write({
    dest: `dist/${format === 'cjs' ? 'index' : `index.${format}`}.js`,
    format,
    sourceMap: true,
    moduleName: pkg.name //format === 'umd' ? pkg.name : undefined,
  })));
}

// Copy package.json, LICENSE.txt, and README.md
promise = promise.then(() => {
  delete pkg.private;
  delete pkg.devDependencies;
  delete pkg.scripts;
  delete pkg.eslintConfig;
  delete pkg.babel;
  fs.writeFileSync('dist/package.json', JSON.stringify(pkg, null, '  '), 'utf-8');
  fs.writeFileSync('dist/LICENSE.txt', fs.readFileSync('LICENSE.txt', 'utf-8'), 'utf-8');
  fs.writeFileSync('dist/README.md', fs.readFileSync('README.md', 'utf-8'), 'utf-8')
});

promise.catch(err => console.error(err.stack)); // eslint-disable-line no-console