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* @file\n *\n * This file has all helperfunctions related to configuration.\n */\n\n/** */\nimport { existsSync, lstatSync } from 'fs';\nimport { Dir, Json } from 'mylas';\nimport { basename, dirname, isAbsolute, join, resolve } from 'path';\nimport {\n  IConfig,\n  IOutput,\n  IProjectConfig,\n  IRawTSConfig,\n  ITSConfig,\n  ReplaceTscAliasPathsOptions\n} from '../interfaces';\nimport { Output, PathCache, TrieNode } from '../utils';\nimport { importReplacers } from './replacers';\nimport normalizePath = require('normalize-path');\n\n/**\n * prepareConfig prepares a IConfig object for tsc-alias to be used.\n * @param {ReplaceTscAliasPathsOptions} options options that are used to prepare a config object.\n * @returns {Promise<IConfig>} a promise of a IConfig object.\n */\nexport async function prepareConfig(\n  options: ReplaceTscAliasPathsOptions\n): Promise<IConfig> {\n  const output = options.output ?? new Output(options.verbose, options.debug);\n\n  const configFile = !options.configFile\n    ? resolve(process.cwd(), 'tsconfig.json')\n    : !isAbsolute(options.configFile)\n    ? resolve(process.cwd(), options.configFile)\n    : options.configFile;\n\n  output.assert(existsSync(configFile), `Invalid file path => ${configFile}`);\n\n  const {\n    baseUrl = '',\n    outDir,\n    declarationDir,\n    paths,\n    replacers,\n    resolveFullPaths,\n    verbose,\n    fileExtensions\n  } = loadConfig(configFile, output);\n\n  if (options?.fileExtensions?.inputGlob) {\n    fileExtensions.inputGlob = options.fileExtensions.inputGlob;\n  }\n  if (options?.fileExtensions?.outputCheck) {\n    fileExtensions.outputCheck = options.fileExtensions.outputCheck;\n  }\n\n  output.verbose = verbose;\n\n  if (options.resolveFullPaths || resolveFullPaths) {\n    output.debug('resolveFullPaths is active');\n    options.resolveFullPaths = true;\n  }\n\n  const _outDir = options.outDir ?? outDir;\n  if (declarationDir && _outDir !== declarationDir) {\n    options.declarationDir ??= declarationDir;\n  }\n\n  output.assert(_outDir, 'compilerOptions.outDir is not set');\n\n  const configDir: string = normalizePath(dirname(configFile));\n\n  // config with project details and paths\n  const projectConfig: IProjectConfig = {\n    configFile: configFile,\n    baseUrl: baseUrl,\n    outDir: _outDir,\n    configDir: configDir,\n    outPath: _outDir,\n    confDirParentFolderName: basename(configDir),\n    hasExtraModule: false,\n    configDirInOutPath: null,\n    relConfDirPathInOutPath: null,\n    pathCache: new PathCache(!options.watch, fileExtensions?.outputCheck),\n    inputGlob:\n      fileExtensions?.inputGlob || '{mjs,cjs,js,jsx,d.{mts,cts,ts,tsx}}'\n  };\n  output.debug('loaded project config:', projectConfig);\n\n  const config: IConfig = {\n    ...projectConfig,\n    output: output,\n    aliasTrie:\n      options.aliasTrie ?? TrieNode.buildAliasTrie(projectConfig, paths),\n    replacers: []\n  };\n  output.debug('loaded full config:', config);\n\n  // Import replacers.\n  await importReplacers(config, replacers, options.replacers);\n  return config;\n}\n\n/**\n * loadConfig loads a config file from fs.\n * @param {string} file file path to the config file that will be loaded.\n * @param {IOutput} output the output instance to log error to.\n * @returns {ITSConfig} a ITSConfig object\n */\nexport const loadConfig = (file: string, output: IOutput): ITSConfig => {\n  if (!existsSync(file)) {\n    output.error(`File ${file} not found`, true);\n  }\n  output.debug('Loading config file:', file);\n  const {\n    extends: ext,\n    compilerOptions: { baseUrl, outDir, declarationDir, paths } = {\n      baseUrl: undefined,\n      outDir: undefined,\n      declarationDir: undefined,\n      paths: undefined\n    },\n    'tsc-alias': TSCAliasConfig\n  } = Json.loadS<IRawTSConfig>(file, true);\n\n  const configDir = dirname(file);\n  output.debug('configDir', configDir);\n  const config: ITSConfig = {};\n\n  if (baseUrl) config.baseUrl = baseUrl;\n  if (outDir) {\n    config.outDir = isAbsolute(outDir) ? outDir : join(configDir, outDir);\n  }\n  if (paths) config.paths = paths;\n  if (declarationDir) {\n    config.declarationDir = isAbsolute(declarationDir)\n      ? declarationDir\n      : join(configDir, declarationDir);\n  }\n  if (TSCAliasConfig?.replacers) {\n    config.replacers = TSCAliasConfig.replacers;\n  }\n  if (TSCAliasConfig?.resolveFullPaths) {\n    config.resolveFullPaths = TSCAliasConfig.resolveFullPaths;\n  }\n  if (TSCAliasConfig?.verbose) {\n    config.verbose = TSCAliasConfig.verbose;\n  }\n  config.fileExtensions = TSCAliasConfig?.fileExtensions ?? {};\n\n  const replacerFile = config.replacers?.pathReplacer?.file;\n\n  if (replacerFile) {\n    config.replacers.pathReplacer.file = join(configDir, replacerFile);\n  }\n\n  output.debug('loaded config (from file):', config);\n  if (ext) {\n    return {\n      ...normalizeTsConfigExtendsOption(ext, file).reduce<ITSConfig>(\n        (pre, ext) => ({\n          ...pre,\n          ...loadConfig(ext, output)\n        }),\n        {}\n      ),\n      ...config\n    };\n  }\n\n  return config;\n};\n\n/**\n * normalizeTsConfigExtendsOption normalizes tsconfig extends option to a directly loadable path array\n * @param { string|string[] } ext\n * @param { string } file\n * @returns {string[]}\n */\nexport function normalizeTsConfigExtendsOption(\n  ext: string | string[],\n  file: string\n): string[] {\n  if (!ext) return [];\n  const configDir = dirname(file);\n  const normExts = (Array.isArray(ext) ? ext : [ext]).map((e) =>\n    e.startsWith('.')\n      ? join(configDir, e.endsWith('.json') ? e : `${e}.json`)\n      : resolveTsConfigExtendsPath(e, file)\n  );\n  return normExts;\n}\n\n/**\n * resolveTsConfigExtendsPath resolves the path to the config file that is being inherited.\n * @param {string} ext the value of the extends field in the loaded config file.\n * @param {string} file file path to the config file that was loaded.\n * @returns {string} a file path to the config file that is being inherited.\n */\nexport function resolveTsConfigExtendsPath(ext: string, file: string): string {\n  const tsConfigDir = dirname(file);\n  const node_modules: string[] = Dir.nodeModules({ cwd: tsConfigDir }); // Getting all node_modules directories.\n  const targetPaths = node_modules.map((v) => join(tsConfigDir, v, ext)); // Mapping node_modules to target paths.\n\n  // Recursively checking ancestor directories for tsconfig.\n  for (const targetPath of targetPaths) {\n    if (ext.endsWith('.json')) {\n      // Check if the file exists.\n      if (existsSync(targetPath)) {\n        return targetPath;\n      } else {\n        continue; // Continue checking when ext is a file but not yet found.\n      }\n    }\n    let isDirectory = false;\n    try {\n      const stats = lstatSync(targetPath);\n      isDirectory = stats.isDirectory() || stats.isSymbolicLink();\n    } catch (err) {}\n    if (isDirectory) {\n      return join(targetPath, 'tsconfig.json');\n    } else {\n      // When target is not a file nor directory check with '.json' extension.\n      if (existsSync(`${targetPath}.json`)) {\n        return `${targetPath}.json`;\n      }\n    }\n  }\n}\n"]}