graphviz: include external .dot files
I'm using django-extension's graph_models command to generate a .dot file representing model relationships. These are fairly complex and I want to automatically regenerate them in my Makefile.
There doesn't appear to be a clean way to include an external .dot file - what I'd really like is something like this so Sphinx could still handle things like output format, size, etc:
.. graphviz-external:: models.dot