jinja2ext.py 文件源码

def parse(self, parser):
        # the first token is the token that started the tag.  In our case
        # we only listen to ``'webpack'`` so this will be a name token with
        # `webpack` as value.  We get the line number so that we can give
        # that line number to the nodes we create by hand.
        lineno = six.next(parser.stream).lineno
        ctx_ref = nodes.ContextReference()

        # Parse a single expression that is the 'bundle' or 'config:bundle'
        args = [ctx_ref, parser.parse_expression()]

        # if there is a comma, the user provided an 'extensions' arg
        if parser.stream.skip_if('comma'):
            args.append(parser.parse_expression())
        else:
            args.append(nodes.Const(None))

        # now we parse the body of the cache block up to `endwebpack` and
        # drop the needle (which would always be `endwebpack` in that case)
        body = parser.parse_statements(['name:endwebpack'], drop_needle=True)

        call_args = [nodes.Name('ASSET', 'param')]

        return nodes.CallBlock(self.call_method('_get_graph', args), call_args,
                               [], body).set_lineno(lineno)