cached.py 文件源码

def cache_key(self, template_name, template_dirs, skip=None):
        """
        Generate a cache key for the template name, dirs, and skip.

        If skip is provided, only origins that match template_name are included
        in the cache key. This ensures each template is only parsed and cached
        once if contained in different extend chains like:

            x -> a -> a
            y -> a -> a
            z -> a -> a
        """
        dirs_prefix = ''
        skip_prefix = ''

        if skip:
            matching = [origin.name for origin in skip if origin.template_name == template_name]
            if matching:
                skip_prefix = self.generate_hash(matching)

        if template_dirs:
            dirs_prefix = self.generate_hash(template_dirs)

        return '-'.join(filter(bool, [force_text(template_name), skip_prefix, dirs_prefix]))