preprocessor.js — react Source File

Source Code

'use strict';

const path = require('path');

const babel = require('@babel/core');
const coffee = require('coffee-script');
const hermesParser = require('hermes-parser');

const tsPreprocessor = require('./typescript/preprocessor');
const createCacheKeyFunction = require('fbjs-scripts/jest/createCacheKeyFunction');
const {ReactVersion} = require('../../ReactVersions');
const semver = require('semver');

const pathToBabel = path.join(
  require.resolve('@babel/core'),
  '../..',
  'package.json'
);
const pathToTransformInfiniteLoops = require.resolve(
  '../babel/transform-prevent-infinite-loops'
);
const pathToTransformTestGatePragma = require.resolve(
  '../babel/transform-test-gate-pragma'
);
const pathToTransformReactVersionPragma = require.resolve(
  '../babel/transform-react-version-pragma'
);
const pathToTransformLazyJSXImport = require.resolve(
  '../babel/transform-lazy-jsx-import'
);
const pathToBabelrc = path.join(__dirname, '..', '..', 'babel.config.js');
const pathToErrorCodes = require.resolve('../error-codes/codes.json');

const ReactVersionTestingAgainst = process.env.REACT_VERSION || ReactVersion;

const babelOptions = {
  plugins: [
    // For Node environment only. For builds, Rollup takes care of ESM.
    require.resolve('@babel/plugin-transform-modules-commonjs'),

    pathToTransformInfiniteLoops,
    pathToTransformTestGatePragma,

    // This optimization is important for extremely performance-sensitive (e.g. React source).
    // It's okay to disable it for tests.
    [
      require.resolve('@babel/plugin-transform-block-scoping'),
      {throwIfClosureRequired: false},
    ],
  ],
  retainLines: true,
};

module.exports = {
  process: function (src, filePath) {
    if (filePath.match(/\.css$/)) {
      // Don't try to parse CSS modules; they aren't needed for tests anyway.
      return {code: ''};
    }
    if (filePath.match(/\.coffee$/)) {
// ... (86 more lines)