111 строки
2.5 KiB
JavaScript
111 строки
2.5 KiB
JavaScript
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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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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*
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* @emails react_native
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* @format
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*/
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const babel = require('@babel/core');
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const {OptionManager, DEFAULT_EXTENSIONS} = require('@babel/core');
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const sourceMapSupport = require('source-map-support');
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const {addHook} = require('pirates');
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const path = require('path');
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const fs = require('fs');
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const diskCache = require('./disk-cache');
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function compile(sourceMapManager, cache, options, code, filename) {
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const opts = new OptionManager().init({
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sourceRoot: path.dirname(filename) + path.sep,
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...options,
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filename,
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});
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// Bail out ASAP if the file has been ignored.
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if (opts === null) {
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return code;
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}
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let output = cache[filename];
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if (!output || output.mtime !== mtime(filename)) {
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output = babel.transformSync(code, {
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...opts,
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sourceMaps: opts.sourceMaps === undefined ? 'both' : opts.sourceMaps,
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ast: false,
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});
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cache[filename] = output;
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output.mtime = mtime(filename);
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}
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if (!sourceMapManager.isInstalled) {
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sourceMapManager.install();
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}
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if (output.map) {
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sourceMapManager.maps[filename] = output.map;
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}
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return output.code;
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}
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function mtime(filename) {
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return +fs.statSync(filename).mtime;
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}
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function withBabelRegister(options, fn) {
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let revertHook;
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/**
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* TODO: Do source maps break when we use a require hook
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* to before we initialize the ESLint plugin?
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*/
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const sourceMapManager = {
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isInstalled: false,
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maps: {},
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install() {
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if (sourceMapManager.isInstalled) {
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return;
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}
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sourceMapManager.isInstalled = true;
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sourceMapSupport.install({
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handleUncaughtExceptions: true,
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environment: 'node',
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retrieveSourceMap(filename) {
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const map = sourceMapManager.maps && sourceMapManager.maps[filename];
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if (map) {
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return {
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url: null,
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map: map,
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};
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} else {
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return null;
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}
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},
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});
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},
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};
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diskCache.load();
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const cache = diskCache.get();
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try {
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revertHook = addHook(
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(code, filename) => {
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return compile(sourceMapManager, cache, options, code, filename);
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},
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{
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exts: DEFAULT_EXTENSIONS,
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ignoreNodeModules: false,
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},
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);
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return fn();
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} finally {
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revertHook();
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}
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}
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module.exports = withBabelRegister;
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