.

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

@@ -0,0 +1,90 @@
+'use strict';
+
+Object.defineProperty(exports, '__esModule', {
+  value: true
+});
+exports.clearCachedLookups = clearCachedLookups;
+exports.default = cachedShouldLoadAsEsm;
+function _path() {
+  const data = require('path');
+  _path = function () {
+    return data;
+  };
+  return data;
+}
+function _vm() {
+  const data = require('vm');
+  _vm = function () {
+    return data;
+  };
+  return data;
+}
+var _fileWalkers = require('./fileWalkers');
+/**
+ * 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.
+ */
+
+// @ts-expect-error: experimental, not added to the types
+
+const runtimeSupportsVmModules = typeof _vm().SyntheticModule === 'function';
+const cachedFileLookups = new Map();
+const cachedDirLookups = new Map();
+const cachedChecks = new Map();
+function clearCachedLookups() {
+  cachedFileLookups.clear();
+  cachedDirLookups.clear();
+  cachedChecks.clear();
+}
+function cachedShouldLoadAsEsm(path, extensionsToTreatAsEsm) {
+  if (!runtimeSupportsVmModules) {
+    return false;
+  }
+  let cachedLookup = cachedFileLookups.get(path);
+  if (cachedLookup === undefined) {
+    cachedLookup = shouldLoadAsEsm(path, extensionsToTreatAsEsm);
+    cachedFileLookups.set(path, cachedLookup);
+  }
+  return cachedLookup;
+}
+
+// this is a bad version of what https://github.com/nodejs/modules/issues/393 would provide
+function shouldLoadAsEsm(path, extensionsToTreatAsEsm) {
+  const extension = (0, _path().extname)(path);
+  if (extension === '.mjs') {
+    return true;
+  }
+  if (extension === '.cjs') {
+    return false;
+  }
+  if (extension !== '.js') {
+    return extensionsToTreatAsEsm.includes(extension);
+  }
+  const cwd = (0, _path().dirname)(path);
+  let cachedLookup = cachedDirLookups.get(cwd);
+  if (cachedLookup === undefined) {
+    cachedLookup = cachedPkgCheck(cwd);
+    cachedFileLookups.set(cwd, cachedLookup);
+  }
+  return cachedLookup;
+}
+function cachedPkgCheck(cwd) {
+  const pkgPath = (0, _fileWalkers.findClosestPackageJson)(cwd);
+  if (!pkgPath) {
+    return false;
+  }
+  let hasModuleField = cachedChecks.get(pkgPath);
+  if (hasModuleField != null) {
+    return hasModuleField;
+  }
+  try {
+    const pkg = (0, _fileWalkers.readPackageCached)(pkgPath);
+    hasModuleField = pkg.type === 'module';
+  } catch {
+    hasModuleField = false;
+  }
+  cachedChecks.set(pkgPath, hasModuleField);
+  return hasModuleField;
+}