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							- '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) Facebook, Inc. and its affiliates. All Rights Reserved.
 
-  *
 
-  * 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;
 
- }
 
 
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