pack.py 文件源码

def __exit__(self: 'FileChange', *exc) -> None:
        """Clean up after change -- both success and failure."""

        if any(exc):  # Failure -- rollback
            if self.__valid_destination:
                if self.__file_change:
                    # Ignore missing file on deletion
                    with suppress(FileNotFoundError):
                        self.new_path.unlink()

            if self.__valid_source:
                if self.__file_change:
                    self.tmp_path.rename(self.old_path)
                if self.__store_change:
                    self.source[self.old_file.mod.id] = self.old_file

        else:  # Success -- change metadata
            if self.__valid_destination:
                self.destination[self.new_file.mod.id] = self.new_file

            # Clean temporary file
            if self.__valid_source and self.__file_change:
                    self.tmp_path.unlink()