You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: rpm.rb
    path of file: ./repos/fpm/lib/fpm/package
    
    the code of the file until where you have to start completion: require "fpm/package"
require "backports/latest"
require "fileutils"
require "find"
require "arr-pm/file" # gem 'arr-pm'

# For conversion handling
require "fpm/package/gem"

# RPM Package type.
#
# Build RPMs without having to waste hours reading Maximum-RPM.
# Well, in case you want to read it, here: http://www.rpm.org/max-rpm/
#
# The following attributes are supported:
#
# * :rpm_rpmbu
    
  def prefixed_path(path)
    Pathname.new(path).absolute?() ? path : File.join(self.prefix, path)
  end # def prefixed_path

  def output(output_path)
    output_check(output_path)
    %w(BUILD RPMS SRPMS SOURCES SPECS).each { |d| FileUtils.mkdir_p(build_path(d)) }
    args = ["rpmbuild", "-bb"]

    if %x{uname -m}.chomp != self.architecture
      rpm_target = self.architecture
    end

    # issue #309
    if !attributes[:rpm_os].nil?
      rpm_target = "#{architecture}-unknown-#{attributes[:rpm_os]}"
    end