private constructor()

in packages/jest-haste-map/src/index.ts [247:305]
56 lines of code
13 McCabe index (conditional complexity)

  private constructor(options: Options) {
    super();
    this._options = {
      cacheDirectory: options.cacheDirectory || tmpdir(),
      computeDependencies:
        options.computeDependencies === undefined
          ? true
          : options.computeDependencies,
      computeSha1: options.computeSha1 || false,
      dependencyExtractor: options.dependencyExtractor || null,
      enableSymlinks: options.enableSymlinks || false,
      extensions: options.extensions,
      forceNodeFilesystemAPI: !!options.forceNodeFilesystemAPI,
      hasteImplModulePath: options.hasteImplModulePath,
      maxWorkers: options.maxWorkers,
      mocksPattern: options.mocksPattern
        ? new RegExp(options.mocksPattern)
        : null,
      name: options.name,
      platforms: options.platforms,
      resetCache: options.resetCache,
      retainAllFiles: options.retainAllFiles,
      rootDir: options.rootDir,
      roots: Array.from(new Set(options.roots)),
      skipPackageJson: !!options.skipPackageJson,
      throwOnModuleCollision: !!options.throwOnModuleCollision,
      useWatchman: options.useWatchman == null ? true : options.useWatchman,
      watch: !!options.watch,
    };
    this._console = options.console || globalThis.console;

    if (options.ignorePattern) {
      if (options.ignorePattern instanceof RegExp) {
        this._options.ignorePattern = new RegExp(
          options.ignorePattern.source.concat(`|${VCS_DIRECTORIES}`),
          options.ignorePattern.flags,
        );
      } else {
        throw new Error(
          'jest-haste-map: the `ignorePattern` option must be a RegExp',
        );
      }
    } else {
      this._options.ignorePattern = new RegExp(VCS_DIRECTORIES);
    }

    if (this._options.enableSymlinks && this._options.useWatchman) {
      throw new Error(
        'jest-haste-map: enableSymlinks config option was set, but ' +
          'is incompatible with watchman.\n' +
          'Set either `enableSymlinks` to false or `useWatchman` to false.',
      );
    }

    this._cachePath = '';
    this._buildPromise = null;
    this._watchers = [];
    this._worker = null;
  }