def install_gems
        gems_collection = Chef::ResourceCollection.new
        gem_packages.each { |rbgem| gems_collection << rbgem }
        Chef::Runner.new(@node, gems_collection).converge
      end
      
      def gem_packages
        return [] unless ::File.exist?("#{release_path}/gems.yml")
        gems = YAML.load(IO.read("#{release_path}/gems.yml"))
        
        gems.map do |g|
          r = Chef::Resource::GemPackage.new(g[:name], nil, node)
          r.version g[:version]
          r.action :install
          r.source "http://gems.github.com"
          r
        end
      end