@mhoye@cosocial.ca I worked on a fairly substantial project in Rust using prost and tonic. I had to make a few contortions to facilitate testing services. We had all the proto files and generated implementations in a single crate for ease, and had a build script that massaged the code that the tonic-build crate generated. Then each service had its own crate to provide implementation, which kept things fairly isolated.
Whilst generally it all worked well, with no significant issues, there were type-system annoyances with protobuf itself: like dealing with Options, enums were annoying, and so on.
