babel.config.js

// Copyright (c) 2020 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

const KeplerPackage = require('./package');

module.exports = function babel(api) {
  api.cache(true);

  const presets = [
    '@babel/preset-env',
    '@babel/preset-react'
  ];
  const plugins = [
    '@babel/plugin-transform-modules-commonjs',
    ['@babel/plugin-proposal-decorators', { legacy: true }],
    '@babel/plugin-proposal-class-properties',
    '@babel/plugin-proposal-export-namespace-from',
    ['@babel/transform-runtime', {
      regenerator: true
    }],
    [
      'module-resolver',
      {
        root: [
          './src'
        ],
        alias: {
          test: './test'
        }
      }
    ],
    ['search-and-replace', {
      rules: [
        {
          search: '__PACKAGE_VERSION__',
          replace: KeplerPackage.version
        }
      ]
    }]
  ];
  const env = {
    test: {
      plugins: [
        'istanbul'
      ]
    },
    debug: {
      sourceMaps: 'inline',
      retainLines: true
    }
  };

  return {
    presets,
    plugins,
    env
  };
};