How can I tell ScalaPB that it should fetch .proto dependencies from the Internet, e.g.
google/api/annotations.proto from https://github.com/googleapis/googleapis/tree/master/google/api
Background:
The aim is to read etcd v3 API from Scala, via gRPC.
I've picked the etcd specific .proto files from their project, and placed under mine. It works. However, the dependencies start running deep, and there must be a better way.
https://github.com/googleapis/googleapis/tree/master/google/api