    # 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