1 files changed, 103 insertions, 0 deletions
diff --git a/lib/rake/gempackagetask.rb b/lib/rake/gempackagetask.rb
new file mode 100644
index 0000000000..a4e5cd1907
--- /dev/null
+++ b/lib/rake/gempackagetask.rb
@@ -0,0 +1,103 @@
+#!/usr/bin/env ruby
+
+# Define a package task library to aid in the definition of GEM
+# packages.
+
+require 'rubygems'
+require 'rake'
+require 'rake/packagetask'
+require 'rubygems/user_interaction'
+require 'rubygems/builder'
+
+begin
+  Gem.manage_gems
+rescue NoMethodError => ex
+  # Using rubygems prior to 0.6.1
+end
+
+module Rake
+
+  # 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:
+  #
+  # [<b>"<em>package_dir</em>/<em>name</em>-<em>version</em>.gem"</b>]
+  #   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
+  #
+  class GemPackageTask < PackageTask
+    # 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.
+    attr_accessor :gem_spec
+
+    # 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.
+    def initialize(gem_spec)
+      init(gem_spec)
+      yield self if block_given?
+      define if block_given?
+    end
+
+    # Initialization tasks without the "yield self" or define
+    # operations.
+    def init(gem)
+      super(gem.name, gem.version)
+      @gem_spec = gem
+      @package_files += gem_spec.files if gem_spec.files
+    end
+
+    # Create the Rake tasks and actions specified by this
+    # GemPackageTask.  (+define+ is automatically called if a block is
+    # given to +new+).
+    def define
+      super
+      task :package => [:gem]
+      desc "Build the gem file #{gem_file}"
+      task :gem => ["#{package_dir}/#{gem_file}"]
+      file "#{package_dir}/#{gem_file}" => [package_dir] + @gem_spec.files do
+        when_writing("Creating GEM") {
+          Gem::Builder.new(gem_spec).build
+          verbose(true) {
+            mv gem_file, "#{package_dir}/#{gem_file}"
+          }
+        }
+      end
+    end
+    
+    def gem_file
+      if @gem_spec.platform == Gem::Platform::RUBY
+        "#{package_name}.gem"
+      else
+        "#{package_name}-#{@gem_spec.platform}.gem"
+      end
+    end
+    
+  end
+end