code: function executableBy(file, user) {
    if (!exists(file)) {
      return false;
    }
    const userData = findUser(user);
    if (userData.id === 0) {
      // Root can do anything but execute a file with no exec permissions
      const mode = fs.lstatSync(file).mode;
      return !!(mode & parseInt('00111', 8));
    } else if (userData.id === process.getuid()) {
      return executable(file);
    } else {
      return _accesibleByUser(userData, file, fs.X_OK);
    }
  }
docs: Check whether a file is executable or not by a given user
  @function $file~executable
  @param {string} file
  @param {string|number} user - Username or user id to check permissions for
  @returns {boolean}
  @example
  // Check if '/bin/ls' is executable by the 'nobody' user
  $file.executable('/bin/ls', 'nobody');
  // => true