Missing google/protobuf types when trying to build google official gRPC SDK

[jbrummack]

Hello,

Im currently trying to build a https://github.com/googleapis/googleapis client using buffa/ConnectRPC and got stuck at

cannot find type `Api` in module `::buffa_types::google::protobuf` not found in `::buffa_types::google::protobuf`
cannot find type `EnumView` in module `::buffa_types::google::protobuf::__buffa::view`
not found in `::buffa_types::google::protobuf::__buffa::view`
cannot find type `TypeView` in module `::buffa_types::google::protobuf::__buffa::view`
not found in `::buffa_types::google::protobuf::__buffa::view`

This means buffa/buffa-types/protos/google/protobuf/ is missing at least api.proto, type.proto and enum.proto from https://github.com/protocolbuffers/protobuf/tree/main/src/google/protobuf

I presume that building the entire googleapis repo may also break at other parts so its probably a good way to test conformance of this crate due to huge amounts of edge cases.

Thank you!

[Divyansh151005]

I'll take this.

The compile error is the package-level .google.protobuf → buffa-types auto-map: codegen routes Api / Type / Enum / SourceContext to ::buffa_types::google::protobuf, but buffa-types currently only ships the JSON-mappable WKTs (Any, Duration, Empty, FieldMask, Struct, Timestamp, wrappers). api.proto / type.proto / source_context.proto are the rest of the official well-known set and are what googleapis (and ConnectRPC clients built from it) import.

Plan:

• Vendor those three .proto files next to the existing ones and regenerate via task gen-wkt-types
• Register them for textproto Any expansion (they use the standard message JSON mapping, not a special WKT encoding)
• Add binary + view round-trip coverage, including a wkt_usage.proto field so the auto-map is compile-tested

I'll open a PR.