v6

node_modules/@jest/transform/build/ScriptTransformer.js

@@ -0,0 +1,863 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true
+});
+exports.default = void 0;
+
+function _crypto() {
+  const data = _interopRequireDefault(require('crypto'));
+
+  _crypto = function _crypto() {
+    return data;
+  };
+
+  return data;
+}
+
+function _path() {
+  const data = _interopRequireDefault(require('path'));
+
+  _path = function _path() {
+    return data;
+  };
+
+  return data;
+}
+
+function _vm() {
+  const data = _interopRequireDefault(require('vm'));
+
+  _vm = function _vm() {
+    return data;
+  };
+
+  return data;
+}
+
+function _jestUtil() {
+  const data = require('jest-util');
+
+  _jestUtil = function _jestUtil() {
+    return data;
+  };
+
+  return data;
+}
+
+function _gracefulFs() {
+  const data = _interopRequireDefault(require('graceful-fs'));
+
+  _gracefulFs = function _gracefulFs() {
+    return data;
+  };
+
+  return data;
+}
+
+function _core() {
+  const data = require('@babel/core');
+
+  _core = function _core() {
+    return data;
+  };
+
+  return data;
+}
+
+function _babelPluginIstanbul() {
+  const data = _interopRequireDefault(require('babel-plugin-istanbul'));
+
+  _babelPluginIstanbul = function _babelPluginIstanbul() {
+    return data;
+  };
+
+  return data;
+}
+
+function _convertSourceMap() {
+  const data = _interopRequireDefault(require('convert-source-map'));
+
+  _convertSourceMap = function _convertSourceMap() {
+    return data;
+  };
+
+  return data;
+}
+
+function _jestHasteMap() {
+  const data = _interopRequireDefault(require('jest-haste-map'));
+
+  _jestHasteMap = function _jestHasteMap() {
+    return data;
+  };
+
+  return data;
+}
+
+function _fastJsonStableStringify() {
+  const data = _interopRequireDefault(require('fast-json-stable-stringify'));
+
+  _fastJsonStableStringify = function _fastJsonStableStringify() {
+    return data;
+  };
+
+  return data;
+}
+
+function _slash() {
+  const data = _interopRequireDefault(require('slash'));
+
+  _slash = function _slash() {
+    return data;
+  };
+
+  return data;
+}
+
+function _writeFileAtomic() {
+  const data = _interopRequireDefault(require('write-file-atomic'));
+
+  _writeFileAtomic = function _writeFileAtomic() {
+    return data;
+  };
+
+  return data;
+}
+
+function _realpathNative() {
+  const data = require('realpath-native');
+
+  _realpathNative = function _realpathNative() {
+    return data;
+  };
+
+  return data;
+}
+
+function _pirates() {
+  const data = require('pirates');
+
+  _pirates = function _pirates() {
+    return data;
+  };
+
+  return data;
+}
+
+var _shouldInstrument = _interopRequireDefault(require('./shouldInstrument'));
+
+var _enhanceUnexpectedTokenMessage = _interopRequireDefault(
+  require('./enhanceUnexpectedTokenMessage')
+);
+
+function _interopRequireDefault(obj) {
+  return obj && obj.__esModule ? obj : {default: obj};
+}
+
+function _defineProperty(obj, key, value) {
+  if (key in obj) {
+    Object.defineProperty(obj, key, {
+      value: value,
+      enumerable: true,
+      configurable: true,
+      writable: true
+    });
+  } else {
+    obj[key] = value;
+  }
+  return obj;
+}
+
+function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {
+  try {
+    var info = gen[key](arg);
+    var value = info.value;
+  } catch (error) {
+    reject(error);
+    return;
+  }
+  if (info.done) {
+    resolve(value);
+  } else {
+    Promise.resolve(value).then(_next, _throw);
+  }
+}
+
+function _asyncToGenerator(fn) {
+  return function() {
+    var self = this,
+      args = arguments;
+    return new Promise(function(resolve, reject) {
+      var gen = fn.apply(self, args);
+      function _next(value) {
+        asyncGeneratorStep(gen, resolve, reject, _next, _throw, 'next', value);
+      }
+      function _throw(err) {
+        asyncGeneratorStep(gen, resolve, reject, _next, _throw, 'throw', err);
+      }
+      _next(undefined);
+    });
+  };
+}
+
+// Use `require` to avoid TS rootDir
+const _require = require('../package.json'),
+  VERSION = _require.version; // This data structure is used to avoid recalculating some data every time that
+// we need to transform a file. Since ScriptTransformer is instantiated for each
+// file we need to keep this object in the local scope of this module.
+
+const projectCaches = new WeakMap(); // To reset the cache for specific changesets (rather than package version).
+
+const CACHE_VERSION = '1';
+
+function waitForPromiseWithCleanup(_x, _x2) {
+  return _waitForPromiseWithCleanup.apply(this, arguments);
+}
+
+function _waitForPromiseWithCleanup() {
+  _waitForPromiseWithCleanup = _asyncToGenerator(function*(promise, cleanup) {
+    try {
+      yield promise;
+    } finally {
+      cleanup();
+    }
+  });
+  return _waitForPromiseWithCleanup.apply(this, arguments);
+}
+
+class ScriptTransformer {
+  constructor(config) {
+    _defineProperty(this, '_cache', void 0);
+
+    _defineProperty(this, '_config', void 0);
+
+    _defineProperty(this, '_transformCache', void 0);
+
+    _defineProperty(this, '_transformConfigCache', void 0);
+
+    this._config = config;
+    this._transformCache = new Map();
+    this._transformConfigCache = new Map();
+    let projectCache = projectCaches.get(config);
+
+    if (!projectCache) {
+      projectCache = {
+        configString: (0, _fastJsonStableStringify().default)(this._config),
+        ignorePatternsRegExp: calcIgnorePatternRegExp(this._config),
+        transformRegExp: calcTransformRegExp(this._config),
+        transformedFiles: new Map()
+      };
+      projectCaches.set(config, projectCache);
+    }
+
+    this._cache = projectCache;
+  }
+
+  _getCacheKey(fileData, filename, instrument) {
+    const configString = this._cache.configString;
+
+    const transformer = this._getTransformer(filename);
+
+    if (transformer && typeof transformer.getCacheKey === 'function') {
+      return _crypto()
+        .default.createHash('md5')
+        .update(
+          transformer.getCacheKey(fileData, filename, configString, {
+            config: this._config,
+            instrument,
+            rootDir: this._config.rootDir
+          })
+        )
+        .update(CACHE_VERSION)
+        .digest('hex');
+    } else {
+      return _crypto()
+        .default.createHash('md5')
+        .update(fileData)
+        .update(configString)
+        .update(instrument ? 'instrument' : '')
+        .update(filename)
+        .update(CACHE_VERSION)
+        .digest('hex');
+    }
+  }
+
+  _getFileCachePath(filename, content, instrument) {
+    const baseCacheDir = _jestHasteMap().default.getCacheFilePath(
+      this._config.cacheDirectory,
+      'jest-transform-cache-' + this._config.name,
+      VERSION
+    );
+
+    const cacheKey = this._getCacheKey(content, filename, instrument); // Create sub folders based on the cacheKey to avoid creating one
+    // directory with many files.
+
+    const cacheDir = _path().default.join(
+      baseCacheDir,
+      cacheKey[0] + cacheKey[1]
+    );
+
+    const cacheFilenamePrefix = _path()
+      .default.basename(filename, _path().default.extname(filename))
+      .replace(/\W/g, '');
+
+    const cachePath = (0, _slash().default)(
+      _path().default.join(cacheDir, cacheFilenamePrefix + '_' + cacheKey)
+    );
+    (0, _jestUtil().createDirectory)(cacheDir);
+    return cachePath;
+  }
+
+  _getTransformPath(filename) {
+    const transformRegExp = this._cache.transformRegExp;
+
+    if (!transformRegExp) {
+      return undefined;
+    }
+
+    for (let i = 0; i < transformRegExp.length; i++) {
+      if (transformRegExp[i][0].test(filename)) {
+        const transformPath = transformRegExp[i][1];
+
+        this._transformConfigCache.set(transformPath, transformRegExp[i][2]);
+
+        return transformPath;
+      }
+    }
+
+    return undefined;
+  }
+
+  _getTransformer(filename) {
+    let transform = null;
+
+    if (!this._config.transform || !this._config.transform.length) {
+      return null;
+    }
+
+    const transformPath = this._getTransformPath(filename);
+
+    if (transformPath) {
+      const transformer = this._transformCache.get(transformPath);
+
+      if (transformer != null) {
+        return transformer;
+      }
+
+      transform = require(transformPath);
+
+      const transformerConfig = this._transformConfigCache.get(transformPath);
+
+      if (typeof transform.createTransformer === 'function') {
+        transform = transform.createTransformer(transformerConfig);
+      }
+
+      if (typeof transform.process !== 'function') {
+        throw new TypeError(
+          'Jest: a transform must export a `process` function.'
+        );
+      }
+
+      this._transformCache.set(transformPath, transform);
+    }
+
+    return transform;
+  }
+
+  _instrumentFile(filename, content) {
+    const result = (0, _core().transformSync)(content, {
+      auxiliaryCommentBefore: ' istanbul ignore next ',
+      babelrc: false,
+      caller: {
+        name: '@jest/transform',
+        supportsStaticESM: false
+      },
+      configFile: false,
+      filename,
+      plugins: [
+        [
+          _babelPluginIstanbul().default,
+          {
+            compact: false,
+            // files outside `cwd` will not be instrumented
+            cwd: this._config.rootDir,
+            exclude: [],
+            useInlineSourceMaps: false
+          }
+        ]
+      ]
+    });
+
+    if (result) {
+      const code = result.code;
+
+      if (code) {
+        return code;
+      }
+    }
+
+    return content;
+  }
+
+  _getRealPath(filepath) {
+    try {
+      return (0, _realpathNative().sync)(filepath) || filepath;
+    } catch (err) {
+      return filepath;
+    }
+  } // We don't want to expose transformers to the outside - this function is just
+  // to warm up `this._transformCache`
+
+  preloadTransformer(filepath) {
+    this._getTransformer(filepath);
+  }
+
+  transformSource(filepath, content, instrument) {
+    const filename = this._getRealPath(filepath);
+
+    const transform = this._getTransformer(filename);
+
+    const cacheFilePath = this._getFileCachePath(filename, content, instrument);
+
+    let sourceMapPath = cacheFilePath + '.map'; // Ignore cache if `config.cache` is set (--no-cache)
+
+    let code = this._config.cache ? readCodeCacheFile(cacheFilePath) : null;
+    const shouldCallTransform = transform && this.shouldTransform(filename); // That means that the transform has a custom instrumentation
+    // logic and will handle it based on `config.collectCoverage` option
+
+    const transformWillInstrument =
+      shouldCallTransform && transform && transform.canInstrument; // If we handle the coverage instrumentation, we should try to map code
+    // coverage against original source with any provided source map
+
+    const mapCoverage = instrument && !transformWillInstrument;
+
+    if (code) {
+      // This is broken: we return the code, and a path for the source map
+      // directly from the cache. But, nothing ensures the source map actually
+      // matches that source code. They could have gotten out-of-sync in case
+      // two separate processes write concurrently to the same cache files.
+      return {
+        code,
+        mapCoverage,
+        sourceMapPath
+      };
+    }
+
+    let transformed = {
+      code: content,
+      map: null
+    };
+
+    if (transform && shouldCallTransform) {
+      const processed = transform.process(content, filename, this._config, {
+        instrument
+      });
+
+      if (typeof processed === 'string') {
+        transformed.code = processed;
+      } else if (processed != null && typeof processed.code === 'string') {
+        transformed = processed;
+      } else {
+        throw new TypeError(
+          "Jest: a transform's `process` function must return a string, " +
+            'or an object with `code` key containing this string.'
+        );
+      }
+    }
+
+    if (!transformed.map) {
+      //Could be a potential freeze here.
+      //See: https://github.com/facebook/jest/pull/5177#discussion_r158883570
+      const inlineSourceMap = _convertSourceMap().default.fromSource(
+        transformed.code
+      );
+
+      if (inlineSourceMap) {
+        transformed.map = inlineSourceMap.toJSON();
+      }
+    }
+
+    if (!transformWillInstrument && instrument) {
+      code = this._instrumentFile(filename, transformed.code);
+    } else {
+      code = transformed.code;
+    }
+
+    if (transformed.map) {
+      const sourceMapContent =
+        typeof transformed.map === 'string'
+          ? transformed.map
+          : JSON.stringify(transformed.map);
+      writeCacheFile(sourceMapPath, sourceMapContent);
+    } else {
+      sourceMapPath = null;
+    }
+
+    writeCodeCacheFile(cacheFilePath, code);
+    return {
+      code,
+      mapCoverage,
+      sourceMapPath
+    };
+  }
+
+  _transformAndBuildScript(filename, options, instrument, fileSource) {
+    const isInternalModule = !!(options && options.isInternalModule);
+    const isCoreModule = !!(options && options.isCoreModule);
+    const content = stripShebang(
+      fileSource || _gracefulFs().default.readFileSync(filename, 'utf8')
+    );
+    let wrappedCode;
+    let sourceMapPath = null;
+    let mapCoverage = false;
+    const willTransform =
+      !isInternalModule &&
+      !isCoreModule &&
+      (this.shouldTransform(filename) || instrument);
+
+    try {
+      const extraGlobals = (options && options.extraGlobals) || [];
+
+      if (willTransform) {
+        const transformedSource = this.transformSource(
+          filename,
+          content,
+          instrument
+        );
+        wrappedCode = wrap(transformedSource.code, ...extraGlobals);
+        sourceMapPath = transformedSource.sourceMapPath;
+        mapCoverage = transformedSource.mapCoverage;
+      } else {
+        wrappedCode = wrap(content, ...extraGlobals);
+      }
+
+      return {
+        mapCoverage,
+        script: new (_vm()).default.Script(wrappedCode, {
+          displayErrors: true,
+          filename: isCoreModule ? 'jest-nodejs-core-' + filename : filename
+        }),
+        sourceMapPath
+      };
+    } catch (e) {
+      if (e.codeFrame) {
+        e.stack = e.message + '\n' + e.codeFrame;
+      }
+
+      if (
+        e instanceof SyntaxError &&
+        e.message.includes('Unexpected token') &&
+        !e.message.includes(' expected')
+      ) {
+        throw (0, _enhanceUnexpectedTokenMessage.default)(e);
+      }
+
+      throw e;
+    }
+  }
+
+  transform(filename, options, fileSource) {
+    let scriptCacheKey = undefined;
+    let instrument = false;
+
+    if (!options.isCoreModule) {
+      instrument = (0, _shouldInstrument.default)(
+        filename,
+        options,
+        this._config
+      );
+      scriptCacheKey = getScriptCacheKey(filename, instrument);
+
+      const result = this._cache.transformedFiles.get(scriptCacheKey);
+
+      if (result) {
+        return result;
+      }
+    }
+
+    const result = this._transformAndBuildScript(
+      filename,
+      options,
+      instrument,
+      fileSource
+    );
+
+    if (scriptCacheKey) {
+      this._cache.transformedFiles.set(scriptCacheKey, result);
+    }
+
+    return result;
+  }
+
+  transformJson(filename, options, fileSource) {
+    const isInternalModule = options.isInternalModule;
+    const isCoreModule = options.isCoreModule;
+    const willTransform =
+      !isInternalModule && !isCoreModule && this.shouldTransform(filename);
+
+    if (willTransform) {
+      const _this$transformSource = this.transformSource(
+          filename,
+          fileSource,
+          false
+        ),
+        transformedJsonSource = _this$transformSource.code;
+
+      return transformedJsonSource;
+    }
+
+    return fileSource;
+  }
+
+  requireAndTranspileModule(moduleName, callback) {
+    // Load the transformer to avoid a cycle where we need to load a
+    // transformer in order to transform it in the require hooks
+    this.preloadTransformer(moduleName);
+    let transforming = false;
+    const revertHook = (0, _pirates().addHook)(
+      (code, filename) => {
+        try {
+          transforming = true;
+          return this.transformSource(filename, code, false).code || code;
+        } finally {
+          transforming = false;
+        }
+      },
+      {
+        exts: [_path().default.extname(moduleName)],
+        ignoreNodeModules: false,
+        matcher: filename => {
+          if (transforming) {
+            // Don't transform any dependency required by the transformer itself
+            return false;
+          }
+
+          return this.shouldTransform(filename);
+        }
+      }
+    );
+
+    const module = require(moduleName);
+
+    if (!callback) {
+      revertHook();
+      return module;
+    }
+
+    try {
+      const cbResult = callback(module);
+
+      if ((0, _jestUtil().isPromise)(cbResult)) {
+        return waitForPromiseWithCleanup(cbResult, revertHook).then(
+          () => module
+        );
+      }
+    } finally {
+      revertHook();
+    }
+
+    return module;
+  }
+  /**
+   * @deprecated use `this.shouldTransform` instead
+   */
+  // @ts-ignore: Unused and private - remove in Jest 25
+
+  _shouldTransform(filename) {
+    return this.shouldTransform(filename);
+  }
+
+  shouldTransform(filename) {
+    const ignoreRegexp = this._cache.ignorePatternsRegExp;
+    const isIgnored = ignoreRegexp ? ignoreRegexp.test(filename) : false;
+    return (
+      !!this._config.transform && !!this._config.transform.length && !isIgnored
+    );
+  }
+}
+
+exports.default = ScriptTransformer;
+
+_defineProperty(ScriptTransformer, 'EVAL_RESULT_VARIABLE', void 0);
+
+const removeFile = path => {
+  try {
+    _gracefulFs().default.unlinkSync(path);
+  } catch (e) {}
+};
+
+const stripShebang = content => {
+  // If the file data starts with a shebang remove it. Leaves the empty line
+  // to keep stack trace line numbers correct.
+  if (content.startsWith('#!')) {
+    return content.replace(/^#!.*/, '');
+  } else {
+    return content;
+  }
+};
+/**
+ * This is like `writeCacheFile` but with an additional sanity checksum. We
+ * cannot use the same technique for source maps because we expose source map
+ * cache file paths directly to callsites, with the expectation they can read
+ * it right away. This is not a great system, because source map cache file
+ * could get corrupted, out-of-sync, etc.
+ */
+
+function writeCodeCacheFile(cachePath, code) {
+  const checksum = _crypto()
+    .default.createHash('md5')
+    .update(code)
+    .digest('hex');
+
+  writeCacheFile(cachePath, checksum + '\n' + code);
+}
+/**
+ * Read counterpart of `writeCodeCacheFile`. We verify that the content of the
+ * file matches the checksum, in case some kind of corruption happened. This
+ * could happen if an older version of `jest-runtime` writes non-atomically to
+ * the same cache, for example.
+ */
+
+function readCodeCacheFile(cachePath) {
+  const content = readCacheFile(cachePath);
+
+  if (content == null) {
+    return null;
+  }
+
+  const code = content.substr(33);
+
+  const checksum = _crypto()
+    .default.createHash('md5')
+    .update(code)
+    .digest('hex');
+
+  if (checksum === content.substr(0, 32)) {
+    return code;
+  }
+
+  return null;
+}
+/**
+ * Writing to the cache atomically relies on 'rename' being atomic on most
+ * file systems. Doing atomic write reduces the risk of corruption by avoiding
+ * two processes to write to the same file at the same time. It also reduces
+ * the risk of reading a file that's being overwritten at the same time.
+ */
+
+const writeCacheFile = (cachePath, fileData) => {
+  try {
+    _writeFileAtomic().default.sync(cachePath, fileData, {
+      encoding: 'utf8'
+    });
+  } catch (e) {
+    if (cacheWriteErrorSafeToIgnore(e, cachePath)) {
+      return;
+    }
+
+    e.message =
+      'jest: failed to cache transform results in: ' +
+      cachePath +
+      '\nFailure message: ' +
+      e.message;
+    removeFile(cachePath);
+    throw e;
+  }
+};
+/**
+ * On Windows, renames are not atomic, leading to EPERM exceptions when two
+ * processes attempt to rename to the same target file at the same time.
+ * If the target file exists we can be reasonably sure another process has
+ * legitimately won a cache write race and ignore the error.
+ */
+
+const cacheWriteErrorSafeToIgnore = (e, cachePath) =>
+  process.platform === 'win32' &&
+  e.code === 'EPERM' &&
+  _gracefulFs().default.existsSync(cachePath);
+
+const readCacheFile = cachePath => {
+  if (!_gracefulFs().default.existsSync(cachePath)) {
+    return null;
+  }
+
+  let fileData;
+
+  try {
+    fileData = _gracefulFs().default.readFileSync(cachePath, 'utf8');
+  } catch (e) {
+    e.message =
+      'jest: failed to read cache file: ' +
+      cachePath +
+      '\nFailure message: ' +
+      e.message;
+    removeFile(cachePath);
+    throw e;
+  }
+
+  if (fileData == null) {
+    // We must have somehow created the file but failed to write to it,
+    // let's delete it and retry.
+    removeFile(cachePath);
+  }
+
+  return fileData;
+};
+
+const getScriptCacheKey = (filename, instrument) => {
+  const mtime = _gracefulFs().default.statSync(filename).mtime;
+
+  return filename + '_' + mtime.getTime() + (instrument ? '_instrumented' : '');
+};
+
+const calcIgnorePatternRegExp = config => {
+  if (
+    !config.transformIgnorePatterns ||
+    config.transformIgnorePatterns.length === 0
+  ) {
+    return undefined;
+  }
+
+  return new RegExp(config.transformIgnorePatterns.join('|'));
+};
+
+const calcTransformRegExp = config => {
+  if (!config.transform.length) {
+    return undefined;
+  }
+
+  const transformRegexp = [];
+
+  for (let i = 0; i < config.transform.length; i++) {
+    transformRegexp.push([
+      new RegExp(config.transform[i][0]),
+      config.transform[i][1],
+      config.transform[i][2]
+    ]);
+  }
+
+  return transformRegexp;
+};
+
+const wrap = (content, ...extras) => {
+  const globals = new Set([
+    'module',
+    'exports',
+    'require',
+    '__dirname',
+    '__filename',
+    'global',
+    'jest',
+    ...extras
+  ]);
+  return (
+    '({"' +
+    ScriptTransformer.EVAL_RESULT_VARIABLE +
+    `":function(${Array.from(globals).join(',')}){` +
+    content +
+    '\n}});'
+  );
+}; // TODO: Can this be added to the static property?
+
+ScriptTransformer.EVAL_RESULT_VARIABLE = 'Object.<anonymous>';