def _handle_output(self, output_generator, image_info: ImageInfo, log_file_path: luigi.LocalTarget): log_file_path = log_file_path.joinpath("docker-build.log") with BuildLogHandler(log_file_path, self.logger, self._task_id, image_info) as log_hanlder: still_running_logger = StillRunningLogger( self.logger, self._task_id, "build image %s" % image_info.get_target_complete_name()) for log_line in output_generator: still_running_logger.log() log_hanlder.handle_log_line(log_line)