code: def merge_options_and_config(cls, config, options, args):
          
          if args:
              config.set(CONFIG_SECTION_NAME, 'input_files', ','.join(args))
          elif config.has_option(CONFIG_SECTION_NAME, 'input_files'):
              for i in config.get(CONFIG_SECTION_NAME, 'input_files').split(','):
                  if not os.path.isabs(i):
                      i = os.path.abspath(
                          os.path.join(os.path.dirname(options.config_file), i))
                  args.append(i)
  
          cls.merge_option_and_config_str('package_file', config, options)
          cls.merge_option_and_config_str('entry_point_process', config, options)
          cls.merge_option_and_config_str('target_engine', config, options)
          cls.merge_option_and_config_str(
              'target_engine_version', config, options)
          cls.merge_option_and_config_str('editor', config, options)
docs: Override in subclass if required.