# class Gem::PackageTask

Create a package based upon a `Gem::Specification`. 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 Rake::PackageTask, a `Gem::PackageTask` will also generate the following tasks:

“package_dir/name-version.gem”

  Create a RubyGems package with the given name and version.

Example using a `Gem::Specification`:

    require 'rubygems'
    require 'rubygems/package_task'

    spec = Gem::Specification.new do |s|
      s.summary = "Ruby based make-like utility."
      s.name = 'rake'
      s.version = PKG_VERSION
      s.requirements << 'none'
      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

    Gem::PackageTask.new(spec) do |pkg|
      pkg.need_zip = true
      pkg.need_tar = true
    end

### Attributes

gem_spec[RW]

Ruby `Gem::Specification` containing the metadata for this package. The name, version and package_files are automatically determined from the gemspec and don’t need to be explicitly provided.

### Public Class Methods

new(gem_spec) { |self| ... } click to toggle source

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/rubygems/package_task.rb, line 73
    def initialize(gem_spec)
      init gem_spec
      yield self if block_given?
      define if block_given?
    end

### Public Instance Methods

define() click to toggle source

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

Calls superclass method

    # File lib/rubygems/package_task.rb, line 93
    def define
      super

      gem_file = File.basename gem_spec.cache_file
      gem_path = File.join package_dir, gem_file
      gem_dir  = File.join package_dir, gem_spec.full_name

      task package: [:gem]

      directory package_dir
      directory gem_dir

      desc "Build the gem file #{gem_file}"
      task gem: [gem_path]

      trace = Rake.application.options.trace
      Gem.configuration.verbose = trace

      file gem_path => [package_dir, gem_dir] + @gem_spec.files do
        chdir(gem_dir) do
          when_writing "Creating #{gem_spec.file_name}" do
            Gem::Package.build gem_spec

            verbose trace do
              mv gem_file, ".."
            end
          end
        end
      end
    end

init(gem) click to toggle source

Initialization tasks without the “yield self” or define operations.

Calls superclass method

    # File lib/rubygems/package_task.rb, line 82
    def init(gem)
      super gem.full_name, :noversion
      @gem_spec = gem
      @package_files += gem_spec.files if gem_spec.files
      @fileutils_output = $stdout
    end