Create a package based upon a Gem spec. Gem packages, as well as zip files and tar/gzipped packages can be produced by this task.

In addition to the Rake targets generated by PackageTask, a GemPackageTask will also generate the following tasks:

"package_dir/name-version.gem"
Create a Ruby GEM package with the given name and version.

Example using a Ruby GEM spec:

  require 'rubygems'

  spec = Gem::Specification.new do |s|
    s.platform = Gem::Platform::RUBY
    s.summary = "Ruby based make-like utility."
    s.name = 'rake'
    s.version = PKG_VERSION
    s.requirements << 'none'
    s.require_path = 'lib'
    s.autorequire = 'rake'
    s.files = PKG_FILES
    s.description = <<EOF
  Rake is a Make-like program implemented in Ruby. Tasks
  and dependencies are specified in standard Ruby syntax.
  EOF
  end

  Rake::GemPackageTask.new(spec) do |pkg|
    pkg.need_zip = true
    pkg.need_tar = true
  end
Methods
Attributes
[RW] gem_spec Ruby GEM spec containing the metadata for this package. The name, version and package_files are automatically determined from the GEM spec and don‘t need to be explicitly provided.
Public Class methods
new(gem_spec) {|self if block_given?| ...}

Create a GEM Package task library. Automatically define the gem if a block is given. If no block is supplied, then define needs to be called to define the task.

    # File lib/rake/gempackagetask.rb, line 58
58:     def initialize(gem_spec)
59:       init(gem_spec)
60:       yield self if block_given?
61:       define if block_given?
62:     end
Public Instance methods
define()

Create the Rake tasks and actions specified by this GemPackageTask. (define is automatically called if a block is given to new).

    # File lib/rake/gempackagetask.rb, line 75
75:     def define
76:       super
77:       task :package => ['package:gem']
78:       desc "Build the gem file #{gem_file}"
79:       task 'package:gem' => ["#{package_dir}/#{gem_file}"]
80:       file "#{package_dir}/#{gem_file}" => [package_dir] + @gem_spec.files do
81:         when_writing("Creating GEM") {
82:           Gem::Builder.new(gem_spec).build
83:           verbose(true) {
84:             mv gem_file, "#{package_dir}/#{gem_file}"
85:           }
86:         }
87:       end
88:     end
gem_file()
    # File lib/rake/gempackagetask.rb, line 90
90:     def gem_file
91:       if @gem_spec.platform == Gem::Platform::RUBY
92:         "#{package_name}.gem"
93:       else
94:         "#{package_name}-#{@gem_spec.platform}.gem"
95:       end
96:     end
init(gem)

Initialization tasks without the "yield self" or define operations.

    # File lib/rake/gempackagetask.rb, line 66
66:     def init(gem)
67:       super(gem.name, gem.version)
68:       @gem_spec = gem
69:       @package_files += gem_spec.files if gem_spec.files
70:     end