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Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT license.\n// See LICENSE in the project root for license information.\n\n// This is a workaround for https://github.com/eslint/eslint/issues/3458\n//\n// To correct how ESLint searches for plugin packages, add this line to the top of your project's .eslintrc.js file:\n//\n//    require(\"@rushstack/eslint-patch/modern-module-resolution\");\n//\nconst path = require('path');\nconst fs = require('fs');\n\nconst isModuleResolutionError: (ex: unknown) => boolean = (ex) =>\n  typeof ex === 'object' && !!ex && 'code' in ex && (ex as { code: unknown }).code === 'MODULE_NOT_FOUND';\n\n// Module path for eslintrc.cjs\n// Example: \".../@eslint/eslintrc/dist/eslintrc.cjs\"\nlet eslintrcBundlePath: string | undefined = undefined;\n\n// Module path for config-array-factory.js\n// Example: \".../@eslint/eslintrc/lib/config-array-factory\"\nlet configArrayFactoryPath: string | undefined = undefined;\n\n// Module path for relative-module-resolver.js\n// Example: \".../@eslint/eslintrc/lib/shared/relative-module-resolver\"\nlet moduleResolverPath: string | undefined = undefined;\n\n// Folder path where ESLint's package.json can be found\n// Example: \".../node_modules/eslint\"\nlet eslintFolder: string | undefined = undefined;\n\n// Probe for the ESLint >=8.0.0 layout:\nfor (let currentModule = module; ; ) {\n  if (!eslintrcBundlePath) {\n    // For ESLint >=8.0.0, all @eslint/eslintrc code is bundled at this path:\n    //   .../@eslint/eslintrc/dist/eslintrc.cjs\n    try {\n      const eslintrcFolder = path.dirname(\n        require.resolve('@eslint/eslintrc/package.json', { paths: [currentModule.path] })\n      );\n\n      // Make sure we actually resolved the module in our call path\n      // and not some other spurious dependency.\n      if (path.join(eslintrcFolder, 'dist/eslintrc.cjs') === currentModule.filename) {\n        eslintrcBundlePath = path.join(eslintrcFolder, 'dist/eslintrc.cjs');\n      }\n    } catch (ex: unknown) {\n      // Module resolution failures are expected, as we're walking\n      // up our require stack to look for eslint. All other errors\n      // are rethrown.\n      if (!isModuleResolutionError(ex)) {\n        throw ex;\n      }\n    }\n  } else {\n    // Next look for a file in ESLint's folder\n    //   .../eslint/lib/cli-engine/cli-engine.js\n    try {\n      const eslintCandidateFolder = path.dirname(\n        require.resolve('eslint/package.json', {\n          paths: [currentModule.path]\n        })\n      );\n\n      // Make sure we actually resolved the module in our call path\n      // and not some other spurious dependency.\n      if (path.join(eslintCandidateFolder, 'lib/cli-engine/cli-engine.js') === currentModule.filename) {\n        eslintFolder = eslintCandidateFolder;\n        break;\n      }\n    } catch (ex: unknown) {\n      // Module resolution failures are expected, as we're walking\n      // up our require stack to look for eslint. All other errors\n      // are rethrown.\n      if (!isModuleResolutionError(ex)) {\n        throw ex;\n      }\n    }\n  }\n\n  if (!currentModule.parent) {\n    break;\n  }\n  currentModule = currentModule.parent;\n}\n\nif (!eslintFolder) {\n  // Probe for the ESLint >=7.8.0 layout:\n  for (let currentModule = module; ; ) {\n    if (!configArrayFactoryPath) {\n      // For ESLint >=7.8.0, config-array-factory.js is at this path:\n      //   .../@eslint/eslintrc/lib/config-array-factory.js\n      try {\n        const eslintrcFolder = path.dirname(\n          require.resolve('@eslint/eslintrc/package.json', {\n            paths: [currentModule.path]\n          })\n        );\n\n        if (path.join(eslintrcFolder, '/lib/config-array-factory.js') == currentModule.filename) {\n          configArrayFactoryPath = path.join(eslintrcFolder, 'lib/config-array-factory.js');\n          moduleResolverPath = path.join(eslintrcFolder, 'lib/shared/relative-module-resolver');\n        }\n      } catch (ex: unknown) {\n        // Module resolution failures are expected, as we're walking\n        // up our require stack to look for eslint. All other errors\n        // are rethrown.\n        if (!isModuleResolutionError(ex)) {\n          throw ex;\n        }\n      }\n    } else {\n      // Next look for a file in ESLint's folder\n      //   .../eslint/lib/cli-engine/cli-engine.js\n      try {\n        const eslintCandidateFolder = path.dirname(\n          require.resolve('eslint/package.json', {\n            paths: [currentModule.path]\n          })\n        );\n\n        if (path.join(eslintCandidateFolder, 'lib/cli-engine/cli-engine.js') == currentModule.filename) {\n          eslintFolder = eslintCandidateFolder;\n          break;\n        }\n      } catch (ex: unknown) {\n        // Module resolution failures are expected, as we're walking\n        // up our require stack to look for eslint. All other errors\n        // are rethrown.\n        if (!isModuleResolutionError(ex)) {\n          throw ex;\n        }\n      }\n    }\n\n    if (!currentModule.parent) {\n      break;\n    }\n    currentModule = currentModule.parent;\n  }\n}\n\nif (!eslintFolder) {\n  // Probe for the <7.8.0 layout:\n  for (let currentModule = module; ; ) {\n    // For ESLint <7.8.0, config-array-factory.js was at this path:\n    //   .../eslint/lib/cli-engine/config-array-factory.js\n    if (/[\\\\/]eslint[\\\\/]lib[\\\\/]cli-engine[\\\\/]config-array-factory\\.js$/i.test(currentModule.filename)) {\n      eslintFolder = path.join(path.dirname(currentModule.filename), '../..');\n      configArrayFactoryPath = path.join(eslintFolder, 'lib/cli-engine/config-array-factory');\n      moduleResolverPath = path.join(eslintFolder, 'lib/shared/relative-module-resolver');\n      break;\n    }\n\n    if (!currentModule.parent) {\n      // This was tested with ESLint 6.1.0 .. 7.12.1.\n      throw new Error(\n        'Failed to patch ESLint because the calling module was not recognized.\\n' +\n          'If you are using a newer ESLint version that may be unsupported, please create a GitHub issue:\\n' +\n          'https://github.com/microsoft/rushstack/issues'\n      );\n    }\n    currentModule = currentModule.parent;\n  }\n}\n\n// Detect the ESLint package version\nconst eslintPackageJson = fs.readFileSync(path.join(eslintFolder, 'package.json')).toString();\nconst eslintPackageObject = JSON.parse(eslintPackageJson);\nconst eslintPackageVersion = eslintPackageObject.version;\nconst versionMatch = /^([0-9]+)\\./.exec(eslintPackageVersion); // parse the SemVer MAJOR part\nif (!versionMatch) {\n  throw new Error('Unable to parse ESLint version: ' + eslintPackageVersion);\n}\nconst eslintMajorVersion = Number(versionMatch[1]);\nif (!(eslintMajorVersion >= 6 && eslintMajorVersion <= 8)) {\n  throw new Error(\n    'The patch-eslint.js script has only been tested with ESLint version 6.x, 7.x, and 8.x.' +\n      ` (Your version: ${eslintPackageVersion})\\n` +\n      'Consider reporting a GitHub issue:\\n' +\n      'https://github.com/microsoft/rushstack/issues'\n  );\n}\n\nlet ConfigArrayFactory;\nif (eslintMajorVersion === 8) {\n  ConfigArrayFactory = require(eslintrcBundlePath!).Legacy.ConfigArrayFactory;\n} else {\n  ConfigArrayFactory = require(configArrayFactoryPath!).ConfigArrayFactory;\n}\nif (!ConfigArrayFactory.__patched) {\n  ConfigArrayFactory.__patched = true;\n\n  let ModuleResolver: { resolve: any };\n  if (eslintMajorVersion === 8) {\n    ModuleResolver = require(eslintrcBundlePath!).Legacy.ModuleResolver;\n  } else {\n    ModuleResolver = require(moduleResolverPath!);\n  }\n  const originalLoadPlugin = ConfigArrayFactory.prototype._loadPlugin;\n\n  if (eslintMajorVersion === 6) {\n    // ESLint 6.x\n    ConfigArrayFactory.prototype._loadPlugin = function (\n      name: string,\n      importerPath: string,\n      importerName: string\n    ) {\n      const originalResolve = ModuleResolver.resolve;\n      try {\n        ModuleResolver.resolve = function (moduleName: string, relativeToPath: string) {\n          try {\n            // resolve using importerPath instead of relativeToPath\n            return originalResolve.call(this, moduleName, importerPath);\n          } catch (e) {\n            if (isModuleResolutionError(e)) {\n              return originalResolve.call(this, moduleName, relativeToPath);\n            }\n            throw e;\n          }\n        };\n        return originalLoadPlugin.apply(this, arguments);\n      } finally {\n        ModuleResolver.resolve = originalResolve;\n      }\n    };\n  } else {\n    // ESLint 7.x || 8.x\n    ConfigArrayFactory.prototype._loadPlugin = function (name: string, ctx: Record<string, unknown>) {\n      const originalResolve = ModuleResolver.resolve;\n      try {\n        ModuleResolver.resolve = function (moduleName: string, relativeToPath: string) {\n          try {\n            // resolve using ctx.filePath instead of relativeToPath\n            return originalResolve.call(this, moduleName, ctx.filePath);\n          } catch (e) {\n            if (isModuleResolutionError(e)) {\n              return originalResolve.call(this, moduleName, relativeToPath);\n            }\n            throw e;\n          }\n        };\n        return originalLoadPlugin.apply(this, arguments);\n      } finally {\n        ModuleResolver.resolve = originalResolve;\n      }\n    };\n  }\n}\n"]}