# File lib/fpm/package/puppet.rb, line 97
  def uid2user(uid)
    begin
      pwent = Etc.getpwuid(uid)
      return pwent.name
    rescue ArgumentError => e
      # Invalid user id? No user? Return the uid.
      logger.warn("Failed to find username for uid #{uid}")
      return uid.to_s
    end
  end