react-native/babel-preset/index.js

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 */
'use strict';

module.exports = require('./configs/main');
Introduce transforms pipeline Summary: public This diff introduces an internal transforms pipeline that integrates with the external one. This has been a feature we've been looking to implement for a long time to use babel instead of `replace` with regexps on many parts of the packager. Also, to split the bundle we'll need to run one transform. Internally for Facebook we can run the system-import transform altogether withe the other ones. For OSS we offer `transformer.js` which people can use out of the box if they're writing ES6 code. For those people, `transformer.js` will also run the internal transforms`. However they might want to tune the transforms, or even write the code on another language that compiles to Javascript and use a complete different transformer. On those cases we'll need to run the external transforms first and pipe the output through the internal transforms. Note that the order it's important as the internal transforms assume the code is written in JS, though the original code could be on other scripting languages (CoffeeScript, TypeScript, etc). Reviewed By: davidaurelio Differential Revision: D2725109 fb-gh-sync-id: d764e209c78743419c4cb97068495c771372ab90 2016-01-04 11:31:48 -08:00			`/**`
			`* Copyright (c) 2015-present, Facebook, Inc.`
			`* All rights reserved.`
			`*`
			`* This source code is licensed under the BSD-style license found in the`
			`* LICENSE file in the root directory of this source tree. An additional grant`
			`* of patent rights can be found in the PATENTS file in the same directory.`
			`*/`
			`'use strict';`

Use "babel-preset-react-native" Summary: Rather than specifying Babel plugins in the `.babelrc` packaged with react-native, leverage a Babel preset to define the plugins (https://github.com/exponentjs/babel-preset-react-native). This allows for a much better user experience for those who want (or need) to override options in their project's `.babelrc`. Prior to this PR, if a user wanted to use a custom babel-plugin (or a custom set of babel plugins), they'd have either 1) manually override the `.babelrc` in the react-packager directory (or fork RN), or 2) specify a custom transformer to use when running the packager that loaded their own `.babelrc`. Note - the custom transformer was necessary because without it, RN's `.babelrc` options would supersede the options defined in the project's `.babelrc`...potentially causing issues with plugin ordering. This PR makes the transformer check for the existence of a project-level `.babelrc`, and if it it's there, it _doesn't_ use the react-native `.babelrc`. This prevents any oddities with Babel plug Closes https://github.com/facebook/react-native/pull/5214 Reviewed By: davidaurelio Differential Revision: D2881814 Pulled By: martinbigio fb-gh-sync-id: 4168144b7a365fae62bbeed094d8a03a48b4798c 2016-02-03 08:14:38 -08:00			`module.exports = require('./configs/main');`