prost-types resolves some well known types to their rust counterparts #2526
Description
Bug Report
Version
v0.14.5
Platform
Darwin 192.168.1.131 24.6.0 Darwin Kernel Version 24.6.0: Mon Aug 11 21:16:05 PDT 2025; root:xnu-11417.140.69.701.11~1/RELEASE_X86_64 x86_64
Crates
tonic-prost-build
Description
When using the following well known types as input/output types in service definitions:
- DoubleValue
- FloatValue
- Int32Value
- Int64Value
- UInt32Value
- UInt64Value
cargo build will prefix the primitive type with super::, for example google.protobuf.UInt32Value translates into super::u32.
Reproducing this error is quite easy, just recreate the helloworld example and add the following method:
rpc SomeMethod (HelloRequest) returns (google.protobuf.UInt32Value) {}
I think the problem is that prost-build is already resolving such types into their primitive counterparts, hence tonic-prost-build receives u32 instead of the well known type.
I implemented this solution to take such primitive types into account, using my fork seems to compile fine the helloworld example. The approach is quite simple, I just added the primitive types that can be mapped from a well known type to NON_PATH_TYPE_ALLOWLIST.