should `pbrt` be its own module?

[c-cube]

in particular it's a bit of a shame that ppx_deriving_protobuf has a very similar runtime module and there's no shared efforts. But also: generated code should only depend on pbrt, not ocaml-protoc.

[mransan]

So what you mean is that Pbrt should be its own opam package so that we can limit the dependency of the generated code on that. I agree that it would be ideal. This would be a precondition to share it with ppx_deriving_protobug since ppx_deriving_protobuf being a ppx might have a slower release cycle and a much larger set of dependency. ocaml-protoc used to depend on ppx_deriving_protobuf but because of that I copied over the code.