.

qwen/nodejs/node_modules/jest-resolve/build/fileWalkers.js

@@ -0,0 +1,178 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true
+});
+exports.clearFsCache = clearFsCache;
+exports.findClosestPackageJson = findClosestPackageJson;
+exports.isDirectory = isDirectory;
+exports.isFile = isFile;
+exports.readPackageCached = readPackageCached;
+exports.realpathSync = realpathSync;
+function _path() {
+  const data = require('path');
+  _path = function () {
+    return data;
+  };
+  return data;
+}
+function fs() {
+  const data = _interopRequireWildcard(require('graceful-fs'));
+  fs = function () {
+    return data;
+  };
+  return data;
+}
+function _jestUtil() {
+  const data = require('jest-util');
+  _jestUtil = function () {
+    return data;
+  };
+  return data;
+}
+function _getRequireWildcardCache(nodeInterop) {
+  if (typeof WeakMap !== 'function') return null;
+  var cacheBabelInterop = new WeakMap();
+  var cacheNodeInterop = new WeakMap();
+  return (_getRequireWildcardCache = function (nodeInterop) {
+    return nodeInterop ? cacheNodeInterop : cacheBabelInterop;
+  })(nodeInterop);
+}
+function _interopRequireWildcard(obj, nodeInterop) {
+  if (!nodeInterop && obj && obj.__esModule) {
+    return obj;
+  }
+  if (obj === null || (typeof obj !== 'object' && typeof obj !== 'function')) {
+    return {default: obj};
+  }
+  var cache = _getRequireWildcardCache(nodeInterop);
+  if (cache && cache.has(obj)) {
+    return cache.get(obj);
+  }
+  var newObj = {};
+  var hasPropertyDescriptor =
+    Object.defineProperty && Object.getOwnPropertyDescriptor;
+  for (var key in obj) {
+    if (key !== 'default' && Object.prototype.hasOwnProperty.call(obj, key)) {
+      var desc = hasPropertyDescriptor
+        ? Object.getOwnPropertyDescriptor(obj, key)
+        : null;
+      if (desc && (desc.get || desc.set)) {
+        Object.defineProperty(newObj, key, desc);
+      } else {
+        newObj[key] = obj[key];
+      }
+    }
+  }
+  newObj.default = obj;
+  if (cache) {
+    cache.set(obj, newObj);
+  }
+  return newObj;
+}
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+function clearFsCache() {
+  checkedPaths.clear();
+  checkedRealpathPaths.clear();
+  packageContents.clear();
+}
+var IPathType = /*#__PURE__*/ (function (IPathType) {
+  IPathType[(IPathType['FILE'] = 1)] = 'FILE';
+  IPathType[(IPathType['DIRECTORY'] = 2)] = 'DIRECTORY';
+  IPathType[(IPathType['OTHER'] = 3)] = 'OTHER';
+  return IPathType;
+})(IPathType || {});
+const checkedPaths = new Map();
+function statSyncCached(path) {
+  const result = checkedPaths.get(path);
+  if (result != null) {
+    return result;
+  }
+  let stat;
+  try {
+    // @ts-expect-error TS2554 - throwIfNoEntry is only available in recent version of node, but inclusion of the option is a backward compatible no-op.
+    stat = fs().statSync(path, {
+      throwIfNoEntry: false
+    });
+  } catch (e) {
+    if (!(e && (e.code === 'ENOENT' || e.code === 'ENOTDIR'))) {
+      throw e;
+    }
+  }
+  if (stat) {
+    if (stat.isFile() || stat.isFIFO()) {
+      checkedPaths.set(path, IPathType.FILE);
+      return IPathType.FILE;
+    } else if (stat.isDirectory()) {
+      checkedPaths.set(path, IPathType.DIRECTORY);
+      return IPathType.DIRECTORY;
+    }
+  }
+  checkedPaths.set(path, IPathType.OTHER);
+  return IPathType.OTHER;
+}
+const checkedRealpathPaths = new Map();
+function realpathCached(path) {
+  let result = checkedRealpathPaths.get(path);
+  if (result != null) {
+    return result;
+  }
+  result = (0, _jestUtil().tryRealpath)(path);
+  checkedRealpathPaths.set(path, result);
+  if (path !== result) {
+    // also cache the result in case it's ever referenced directly - no reason to `realpath` that as well
+    checkedRealpathPaths.set(result, result);
+  }
+  return result;
+}
+const packageContents = new Map();
+function readPackageCached(path) {
+  let result = packageContents.get(path);
+  if (result != null) {
+    return result;
+  }
+  result = JSON.parse(fs().readFileSync(path, 'utf8'));
+  packageContents.set(path, result);
+  return result;
+}
+
+// adapted from
+// https://github.com/lukeed/escalade/blob/2477005062cdbd8407afc90d3f48f4930354252b/src/sync.js
+// to use cached `fs` calls
+function findClosestPackageJson(start) {
+  let dir = (0, _path().resolve)('.', start);
+  if (!isDirectory(dir)) {
+    dir = (0, _path().dirname)(dir);
+  }
+  while (true) {
+    const pkgJsonFile = (0, _path().resolve)(dir, './package.json');
+    const hasPackageJson = isFile(pkgJsonFile);
+    if (hasPackageJson) {
+      return pkgJsonFile;
+    }
+    const prevDir = dir;
+    dir = (0, _path().dirname)(dir);
+    if (prevDir === dir) {
+      return undefined;
+    }
+  }
+}
+
+/*
+ * helper functions
+ */
+function isFile(file) {
+  return statSyncCached(file) === IPathType.FILE;
+}
+function isDirectory(dir) {
+  return statSyncCached(dir) === IPathType.DIRECTORY;
+}
+function realpathSync(file) {
+  return realpathCached(file);
+}