if @build_gem
  require 'rubygems/package_task'

  def glob_gem_files
    gem_files = []
    files = FileList[@gem_files.split(' ')]
    files.each do |file|
      if File.directory?(file)
        gem_files << FileList["#{file}/**/*"].exclude("ext/packaging/")
      else
        gem_files << file
      end
    end
    gem_files
  end

  spec = Gem::Specification.new do |s|
    s.name = @name                                        unless @name.nil?
    s.version = @gemversion                               unless @gemversion.nil?
    s.author = @author                                    unless @author.nil?
    s.email = @email                                      unless @email.nil?
    s.homepage = @homepage                                unless @homepage.nil?
    s.summary = @summary                                  unless @summary.nil?
    s.description = @description                          unless @description.nil?
    s.files = glob_gem_files                              unless glob_gem_files.nil?
    s.executables = @gem_executables                      unless @gem_executables.nil?
    s.require_path = @gem_require_path                    unless @gem_require_path.nil?
    s.test_files = FileList[@gem_test_files.split(' ')]   unless @gem_test_files.nil?
    s.rubyforge_project = @gem_forge_project              unless @gem_forge_project.nil?

    @gem_runtime_dependencies.each do |gem, version|
      s.add_runtime_dependency("#{gem}", "#{version}") unless (version.nil? or version.empty?)
      s.add_runtime_dependency("#{gem}") if (version.nil? or version.empty?)
    end unless @gem_runtime_dependencies.nil?

    @gem_devel_dependencies.each do |gem, version|
      s.add_devel_dependency("#{gem}", "#{version}") unless (version.nil? or version.empty?)
      s.add_devel_dependency("#{gem}") if (version.nil? or version.empty?)
    end unless @gem_devel_dependencies.nil?

    @gem_rdoc_options.each do |option|
      s.rdoc_options << option
    end unless @gem_rdoc_options.nil?
  end

  namespace :package do
    Gem::PackageTask.new(spec) do |pkg|
      pkg.need_tar_gz = true
    end
  end
end