153 lines
No EOL
4.4 KiB
JavaScript
153 lines
No EOL
4.4 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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* Note: This is a fork of the fb-specific transform.js
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*
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*
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* @format
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*/
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'use strict';
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const babel = require('babel-core');
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const crypto = require('crypto');
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const externalHelpersPlugin = require('babel-plugin-external-helpers');
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const fs = require('fs');
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const inlineRequiresPlugin = require('babel-preset-fbjs/plugins/inline-requires');
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const json5 = require('json5');
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const makeHMRConfig = require('babel-preset-react-native/configs/hmr');
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const path = require('path');
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const resolvePlugins = require('babel-preset-react-native/lib/resolvePlugins');
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const cacheKeyParts = [
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fs.readFileSync(__filename),
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require('babel-plugin-external-helpers/package.json').version,
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require('babel-preset-fbjs/package.json').version,
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require('babel-preset-react-native/package.json').version];
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/**
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* Return a memoized function that checks for the existence of a
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* project level .babelrc file, and if it doesn't exist, reads the
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* default RN babelrc file and uses that.
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*/
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const getBabelRC = function () {
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let babelRC = null;
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return function _getBabelRC(projectRoot) {
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if (babelRC !== null) {
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return babelRC;
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}
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babelRC = { plugins: [] };
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// Let's look for the .babelrc in the project root.
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// In the future let's look into adding a command line option to specify
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// this location.
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let projectBabelRCPath;
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if (projectRoot) {
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projectBabelRCPath = path.resolve(projectRoot, '.babelrc');
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}
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// If a .babelrc file doesn't exist in the project,
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// use the Babel config provided with react-native.
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if (!projectBabelRCPath || !fs.existsSync(projectBabelRCPath)) {
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babelRC = json5.parse(
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fs.readFileSync(path.resolve(__dirname, '..', 'rn-babelrc.json')));
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// Require the babel-preset's listed in the default babel config
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babelRC.presets = babelRC.presets.map(preset =>
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// $FlowFixMe: dynamic require can't be avoided
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require('babel-preset-' + preset));
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babelRC.plugins = resolvePlugins(babelRC.plugins);
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} else {
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// if we find a .babelrc file we tell babel to use it
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babelRC.extends = projectBabelRCPath;
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}
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return babelRC;
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};
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}();
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/**
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* Given a filename and options, build a Babel
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* config object with the appropriate plugins.
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*/
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function buildBabelConfig(filename, options) {let plugins = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : [];
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const babelRC = getBabelRC(options.projectRoot);
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const extraConfig = {
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babelrc:
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typeof options.enableBabelRCLookup === 'boolean' ?
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options.enableBabelRCLookup :
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true,
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code: false,
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filename };
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let config = Object.assign({}, babelRC, extraConfig);
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// Add extra plugins
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const extraPlugins = [externalHelpersPlugin];
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if (options.inlineRequires) {
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extraPlugins.push(inlineRequiresPlugin);
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}
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config.plugins = extraPlugins.concat(config.plugins, plugins);
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if (options.dev && options.hot) {
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const hmrConfig = makeHMRConfig(options, filename);
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config = Object.assign({}, config, hmrConfig);
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}
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return Object.assign({}, babelRC, config);
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}
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function transform(_ref) {let filename = _ref.filename,options = _ref.options,src = _ref.src,plugins = _ref.plugins;
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options = options || {
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assetDataPlugins: [],
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platform: '',
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projectRoot: '',
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inlineRequires: false,
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minify: false };
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const OLD_BABEL_ENV = process.env.BABEL_ENV;
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process.env.BABEL_ENV = options.dev ? 'development' : 'production';
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try {
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const babelConfig = buildBabelConfig(filename, options, plugins);var _babel$transform =
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babel.transform(src, babelConfig);const ast = _babel$transform.ast;
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return { ast };
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} finally {
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process.env.BABEL_ENV = OLD_BABEL_ENV;
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}
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}
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function getCacheKey() {
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var key = crypto.createHash('md5');
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cacheKeyParts.forEach(part => key.update(part));
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return key.digest('hex');
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}
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module.exports = {
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transform,
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getCacheKey }; |