class Rake::PackageTask

def define
  fail "Version required (or :noversion)" if @version.nil?
  @version = nil if :noversion == @version
  desc "Build all the packages"
  task :package
  desc "Force a rebuild of the package files"
  task repackage: [:clobber_package, :package]
  desc "Remove package products"
  task :clobber_package do
    rm_r package_dir rescue nil
  end
  task clobber: [:clobber_package]
  [
    [need_tar, tgz_file, "z"],
    [need_tar_gz, tar_gz_file, "z"],
    [need_tar_bz2, tar_bz2_file, "j"],
    [need_tar_xz, tar_xz_file, "J"]
  ].each do |need, file, flag|
    if need
      task package: ["#{package_dir}/#{file}"]
      file "#{package_dir}/#{file}" =>
        [package_dir_path] + package_files do
        chdir(working_dir) { sh @tar_command, "#{flag}cvf", file, target_dir }
        mv "#{package_dir_path}/#{target_dir}", package_dir if without_parent_dir
      end
    end
  end
  if need_zip
    task package: ["#{package_dir}/#{zip_file}"]
    file "#{package_dir}/#{zip_file}" =>
      [package_dir_path] + package_files do
      chdir(working_dir) { sh @zip_command, "-r", zip_file, target_dir }
      mv "#{package_dir_path}/#{zip_file}", package_dir if without_parent_dir
    end
  end
  directory package_dir_path => @package_files do
    @package_files.each do |fn|
      f = File.join(package_dir_path, fn)
      fdir = File.dirname(f)
      mkdir_p(fdir) unless File.exist?(fdir)
      if File.directory?(fn)
        mkdir_p(f)
      else
        rm_f f
        safe_ln(fn, f)
      end
    end
  end
  self
end