build.js

/*
 * Backpack - Skyscanner's Design System
 *
 * Copyright 2016 Skyscanner Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/*
In Babel 7+, Babel stops looking for config files once it finds a package.json. As the Babel config file is in the repo root, we need to tell Babel to go
upwards up the tree to find it.

Then, we need to call Webpack manually.
*/

require('@babel/register')({
  rootMode: 'upward',

  // Since Babel ignores all files outside the cwd, it does not compile
  // sibling packages. This rewrites the ignore list to only include node_modules.
  ignore: ['node_modules'],
});

const webpack = require('webpack');

const config = require('./webpack.config.babel');

/* eslint-disable no-console */
webpack(config, (err, stats) => {
  if (err || stats.hasErrors()) {
    console.error(err);
  } else {
    console.log(stats.toString());
  }
});
/* eslint-enable */