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"]
  ].each do |(need, file, flag)|
    if need
      task :package => ["#{package_dir}/#{file}"]
      file "#{package_dir}/#{file}" => [package_dir_path] + package_files do
        chdir(package_dir) do
          sh %{#{@tar_command} #{flag}cvf #{file} #{package_name}}
        end
      end
    end
  end
  
  if need_zip
    task :package => ["#{package_dir}/#{zip_file}"]
    file "#{package_dir}/#{zip_file}" => [package_dir_path] + package_files do
      chdir(package_dir) do
        sh %{#{@zip_command} -r #{zip_file} #{package_name}}
      end
    end
  end
  directory package_dir
  file package_dir_path => @package_files do
    mkdir_p package_dir rescue nil
    @package_files.each do |fn|
      f = File.join(package_dir_path, fn)
      fdir = File.dirname(f)
      mkdir_p(fdir) if !File.exist?(fdir)
      if File.directory?(fn)
        mkdir_p(f)
      else
        rm_f f
        safe_ln(fn, f)
      end
    end
  end
  self
end