importers.append((importer, template))

        if not importers:

            raise errors.UserInputFileError("no importers available", in_file.name)

        source_vars = {

            'source_abspath': in_path.absolute().as_posix(),

            'source_absdir': in_path.absolute().parent.as_posix(),

            'source_name': in_path.name,

            'source_path': in_path.as_posix(),

            'source_stem': in_path.stem,

        }

        with contextlib.ExitStack() as exit_stack:

            output_path = self.config.get_output_path()