class Rake::PackageTask


end
p.package_files.include(“lib/*/.rb”)
p.need_tar = true
Rake::PackageTask.new(“rake”, “1.2.3”) do |p|
Example:
Create a zip package archive (if need_zip is true).
"package_dir/name-version.zip" ::
Create a bzip2’d tar package (if need_tar_bz2 is true).
"package_dir/name-version.tar.bz2" ::
Create a gzipped tar package (if need_tar_gz is true).
"package_dir/name-version.tar.gz" ::
Create a gzipped tar package (if need_tar is true).
"package_dir/name-version.tgz" ::
of date.
Rebuild the package files from scratch, even if they are not out
:repackage ::
added to the main clobber target.
Delete all the package files. This target is automatically
:clobber_package ::
Create all the requested package files.
:package ::
The PackageTask will create the following targets:
distributable files (e.g zip archive or tar files).
Create a packaging task that will package the project into

def define

Create the tasks defined by this task library. 
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

def init(name, version)

Initialization that bypasses the "yield self" and "define" step. 
def init(name, version)
  @name = name
  @version = version
  @package_files = Rake::FileList.new
  @package_dir = "pkg"
  @need_tar = false
  @need_tar_gz = false
  @need_tar_bz2 = false
  @need_tar_xz = false
  @need_zip = false
  @tar_command = "tar"
  @zip_command = "zip"
  @without_parent_dir = false
end

def initialize(name=nil, version=nil) 

def initialize(name=nil, version=nil)
  init(name, version)
  yield self if block_given?
  define unless name.nil?
end

def package_dir_path 

def package_dir_path
  "#{package_dir}/#{package_name}"
end

def package_name 

def package_name
  @version ? "#{@name}-#{@version}" : @name
end

def tar_bz2_file 

def tar_bz2_file
  "#{package_name}.tar.bz2"
end

def tar_gz_file 

def tar_gz_file
  "#{package_name}.tar.gz"
end

def tar_xz_file 

def tar_xz_file
  "#{package_name}.tar.xz"
end

def target_dir

target directory relative to working_dir 
def target_dir
  without_parent_dir ? "." : package_name
end

def tgz_file 

def tgz_file
  "#{package_name}.tgz"
end

def working_dir 

def working_dir
  without_parent_dir ? package_dir_path : package_dir
end

def zip_file 

def zip_file
  "#{package_name}.zip"
end