    # File lib/rubygems/commands/unpack_command.rb, line 10
      def initialize
        super 'unpack', 'Unpack an installed gem to the current directory',
              :version => Gem::Requirement.default,
              :target  => Dir.pwd

        add_option('--target', 'target directory for unpacking') do |value, options|
          options[:target] = value
        end

        add_version_option
      end