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:

Create a Ruby GEM package with the given name and version.

Example using a Ruby GEM spec:

  require 'rubygems'

  spec = do |s|
    s.platform = Gem::Platform::RUBY
    s.summary = "Ruby based make-like utility." = '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.
  end do |pkg|
    pkg.need_zip = true
    pkg.need_tar = true
[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 62
62:     def initialize(gem_spec)
63:       init(gem_spec)
64:       yield self if block_given?
65:       define if block_given?
66:     end
Public Instance methods

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 79
79:     def define
80:       super
81:       task :package => [:gem]
82:       desc "Build the gem file #{gem_file}"
83:       task :gem => ["#{package_dir}/#{gem_file}"]
84:       file "#{package_dir}/#{gem_file}" => [package_dir] + @gem_spec.files do
85:         when_writing("Creating GEM") {
87:           verbose(true) {
88:             mv gem_file, "#{package_dir}/#{gem_file}"
89:           }
90:         }
91:       end
92:     end
     # File lib/rake/gempackagetask.rb, line 94
 94:     def gem_file
 95:       if @gem_spec.platform == Gem::Platform::RUBY
 96:         "#{package_name}.gem"
 97:       else
 98:         "#{package_name}-#{@gem_spec.platform}.gem"
 99:       end
100:     end

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

    # File lib/rake/gempackagetask.rb, line 70
70:     def init(gem)
71:       super(, gem.version)
72:       @gem_spec = gem
73:       @package_files += gem_spec.files if gem_spec.files
74:     end