Unwanted namespacing warning/ or error

What version of gRPC are you using?

1.59.0

What version of Go are you using (`go version`)?

1.21.4

What operating system (Linux, Windows, …) and version?

Linux 6.6.4-arch1-1

What did you do?

I have multiple protos defined in a git repo and the generated code is in this repo as well and I use it to import the functionality into the server and clients.

├── events_service │ ├── admin.proto │ ├── golang │ │ ├── admin │ │ │ ├── admin_grpc.pb.go │ │ │ └── admin.pb.go │ │ ├── generate.sh │ │ ├── go.mod │ │ ├── go.sum │ │ ├── shared │ │ │ └── shared.pb.go │ │ └── user │ │ ├── user_grpc.pb.go │ │ └── user.pb.go │ ├── shared.proto │ └── user.proto ├── mailbox_service │ ├── admin.proto │ ├── golang │ │ ├── admin │ │ │ ├── admin_grpc.pb.go │ │ │ └── admin.pb.go │ │ ├── generate.sh │ │ ├── go.mod │ │ └── user │ │ ├── user_grpc.pb.go │ │ └── user.pb.go │ └── user.proto ├── member_service │ ├── admin.proto │ ├── golang │ │ ├── admin │ │ │ ├── admin_grpc.pb.go │ │ │ └── admin.pb.go │ │ ├── generate.sh │ │ ├── go.mod │ │ ├── registration │ │ │ ├── registration_grpc.pb.go │ │ │ └── registration.pb.go │ │ ├── shared │ │ │ └── shared.pb.go │ │ └── statistics │ │ ├── statistics_grpc.pb.go │ │ └── statistics.pb.go │ ├── registration.proto │ ├── shared.proto │ └── statistics.proto └── README.md

events service
mailbox service
member service

They are not related to eachother.

Inside some of them have a protofile called shared (its only used inside the domain and not shared with the others.)

When I have a client application that use all of the protos I get a panic, but I managed to reduce it to a warning after reading the FAQ in the error message.

I have even namespaced the package name in the proto - for instance:

syntax = "proto3";

package eventsservice.shared;

option go_package = "github.com/dk-slack/protos/events_service/golang/shared";

What did you expect to see?

Nothing, no warning and no errors.

What did you see instead?

After running this:

❯ GOLANG_PROTOBUF_REGISTRATION_CONFLICT=warn go run ./cmd

WARNING: proto: file "shared.proto" is already registered
    previously from: "github.com/dk-slack/protos/events_service/golang/shared"
    currently from:  "github.com/dk-slack/protos/member_service/golang/shared"
See https://protobuf.dev/reference/go/faq#namespace-conflict

WARNING: proto: file "admin.proto" is already registered
    previously from: "github.com/dk-slack/protos/events_service/golang/admin"
    currently from:  "github.com/dk-slack/protos/member_service/golang/admin"
See https://protobuf.dev/reference/go/faq#namespace-conflict

grpc / grpc-go