rsync: filter() method + delete=True leads to unexpected results

I'm using an RSync subclass that implements filter() to ignore some parts of a large tree, specifically things where the remote side has a local version like a virtualenv that should not be touched at all, however, it currently always deletes the remote version ...

I'd be happy to improve the code but need to know whether in general filter()=False + delete=True would expect a filtered item to be removed or left alone on the remote side ... my personal favorite would be to have it ignore the deletions on the remote side and eventually adding a delete_filtered option. This would be in sync with the way regular rsync works.

No se nombran archivos ni pruebas. Empieza localizando el tratamiento de RSync filter() y delete=True, y después revisa las pruebas de sincronización existentes y el comportamiento documentado de rsync normal. Se considera terminado cuando el tratamiento esperado de los elementos remotos filtrados está decidido y cubierto por pruebas de regresión.