did anyone try it? I need to generate scala classes for protobuf 2.5.0 Seems like ScalaPB supports protobuf 3.x and not 2.5.0
So... Nadav Samet answered to me in google group. it's impossible. Quoting his answer:
The problem is that the different versions of protobuf-java are not binary compatible. So if it would work with 2.5.0 it wouldn't work with 3.4.0. If the reason you need protobuf 2.5.x support is because there's some other library that is stuck on that version, consider asking them to move forward, or use a shaded version of protobuf-java so the versions won't conflict.