# File lib/chef/provider/package/macports.rb, line 23
        def current_installed_version
          command = "port installed #{@new_resource.package_name}"
          output = get_response_from_command(command)

          response = nil
          output.each_line do |line|
            match = line.match(/^.+ @([^\s]+) \(active\)$/)
            response = match[1] if match
          end
          response
        end