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(package_dir) { sh @tar_command, "#{flag}cvf", file, package_name }
          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) { sh @zip_command, "-r", zip_file, package_name }
        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
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(package_dir) { sh @tar_command, "#{flag}cvf", file, package_name }
          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) { sh @zip_command, "-r", zip_file, package_name }
        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
Create the tasks defined by this task library.