Method findControlFile

tools/isobuild/compiler-plugin.js:316–350

(basename)

  // .babelrc), and return the absolute path of the first one found, or
  // null if the search failed.
  findControlFile(basename) {
    let absPath = this._controlFileCache[basename];
    if (typeof absPath === "string") {
      return absPath;
    }

    const sourceRoot = this.getSourceRoot(true);
    if (! _.isString(sourceRoot)) {
      return this._controlFileCache[basename] = null;
    }

    let dir = files.pathDirname(
      files.pathJoin(sourceRoot, this.getPathInPackage()));

    while (true) {
      absPath = files.pathJoin(dir, basename);

      const stat = this._stat(absPath);
      if (stat && stat.isFile()) {
        return this._controlFileCache[basename] = absPath;
      }

      if (files.pathBasename(dir) === "node_modules") {
        // The search for control files should not escape node_modules.
        return this._controlFileCache[basename] = null;
      }

      if (dir === sourceRoot) break;
      let parentDir = files.pathDirname(dir);
      if (parentDir === dir) break;
      dir = parentDir;
    }

    return this._controlFileCache[basename] = null;
  }

  _resolveCacheLookup(id, parentPath) {
    const byId = this._resolveCache[id];