8d134ba89e
Summary: as per title. see explanation in code comment Reviewed By: jknoxville Differential Revision: D14125820 fbshipit-source-id: 9b8e31214a65a184397852544cebd7b69ea0aadb
115 lines
3.1 KiB
JavaScript
115 lines
3.1 KiB
JavaScript
/**
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* Copyright 2018-present Facebook.
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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* @format
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*/
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const generate = require('@babel/generator').default;
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const babylon = require('@babel/parser');
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const babel = require('@babel/core');
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const fs = require('fs');
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const path = require('path');
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function transform({filename, options, src}) {
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const presets = [require('../node_modules/@babel/preset-react')];
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const isPlugin =
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options.projectRoot && !__dirname.startsWith(options.projectRoot);
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let ast = babylon.parse(src, {
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filename,
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plugins: [
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'jsx',
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['flow', {all: true}],
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'classProperties',
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'objectRestSpread',
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'optionalChaining',
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],
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sourceType: 'module',
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});
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// run babel
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const plugins = [
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require('../node_modules/@babel/plugin-transform-modules-commonjs'),
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require('../node_modules/@babel/plugin-proposal-object-rest-spread'),
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require('../node_modules/@babel/plugin-proposal-class-properties'),
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require('../node_modules/@babel/plugin-transform-flow-strip-types'),
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require('../node_modules/@babel/plugin-proposal-optional-chaining'),
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require('./dynamic-requires.js'),
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];
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if (
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fs.existsSync(
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path.resolve(path.dirname(path.dirname(__dirname)), 'src', 'fb'),
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)
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) {
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plugins.push(require('./fb-stubs.js'));
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}
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if (process.env.BUILD_HEADLESS) {
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plugins.push(require('./electron-stubs.js'));
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plugins.push(require('./electron-requires.js'));
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} else if (options.isTestRunner) {
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if (process.env.USE_ELECTRON_STUBS) {
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plugins.push(require('./electron-stubs.js'));
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}
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} else {
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// Replacing require statements with electronRequire to prevent metro from
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// resolving them. electronRequire are resolved during runtime by electron.
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// As the tests are not bundled by metro and run in @jest-runner/electron,
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// electron imports are working out of the box.
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plugins.push(require('./electron-requires.js'));
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}
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if (isPlugin) {
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plugins.push(require('./flipper-requires.js'));
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} else {
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plugins.push(require('./import-react.js'));
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}
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ast = babel.transformFromAst(ast, src, {
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ast: true,
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babelrc: !filename.includes('node_modules'),
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code: false,
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comments: false,
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compact: false,
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root: options.projectRoot,
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filename,
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plugins,
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presets,
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sourceMaps: true,
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}).ast;
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const result = generate(
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ast,
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{
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filename,
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sourceFileName: filename,
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sourceMaps: true,
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},
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src,
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);
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return {
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ast,
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code: result.code,
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filename,
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map: result.map,
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};
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}
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module.exports = {
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transform,
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// Disable caching of babel transforms all together. We haven't found a good
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// way to cache our transforms, as they rely on side effects like env vars or
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// the existence of folders in the file system.
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getCacheKey: () => Math.random().toString(36),
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process(src, filename, config, options) {
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return transform({
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src,
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filename,
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config,
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options: {...options, isTestRunner: true},
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});
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},
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};
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