Do you specifically mean a local Google Cloud Datastore compatible store, like the gcloud emulator? That's definitely doable right now, just set the DATASTORE_EMULATOR_HOST env var.
If you mean a different datastore altogether, eg MySQL or PostgreSQL, that's a much bigger project. Related background in https://github.com/snarfed/bridgy/issues/1323 . I wouldn't plan to work on this myself, but I'm happy to help if you want to tackle it!
Do you specifically mean a local Google Cloud Datastore compatible store, like the gcloud emulator? That's definitely doable right now, just set the
DATASTORE_EMULATOR_HOST
env var.If you mean a different datastore altogether, eg MySQL or PostgreSQL, that's a much bigger project. Related background in https://github.com/snarfed/bridgy/issues/1323 . I wouldn't plan to work on this myself, but I'm happy to help if you want to tackle it!