protobuf avoid namespace conflict

[Vasiliy Tolstov]

Hi! I have two packages server and client. All belongs to different
repos. In this packages i have internal/errors dir with errors.proto
file
Both of them contains go_package option and package unique

option go_package = "xxx.org/server/internal/errors";
package server.errors;

option go_package = "xxx.org/client/internal/errors";
package client.errors;

why program that used client and server in the same time have such message

2020/09/29 10:50:18 WARNING: proto: file "errors.proto" is already registered
previously from: ""xxx.org/server/internal/errors"
currently from: ""xxx.org/client/internal/errors"
A future release will panic on registration conflicts. See:
https://developers.google.com/protocol-buffers/docs/reference/go/faq#namespace-conflict

--
Vasiliy Tolstov,
e-mail: v.to...@selfip.ru

[Vasiliy Tolstov]

So nobody knows how to deal with this? And if some projects have proto
files with the same name - protobuf always complain about it?

вт, 29 сент. 2020 г. в 10:50, Vasiliy Tolstov <v.to...@selfip.ru>:

[Joop Kiefte]

This seems to be because the protocol buffer packages rely on shared state, kinda similar to the registration of database drivers in database/sql I would say (correct me if I'm wrong). I don't know how you import them, but you probably need a way to strictly separate the two in your program (example code would help to give more specific advice...).

Joop Kiefte - Chat @ Spike

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[Vasiliy Tolstov]

server https://github.com/unistack-org/micro-server-grpc

client https://github.com/unistack-org/micro-client-grpc

code used both repos https://github.com/unistack-org/micro-tests/tree/master/server/grpc

ср, 30 сент. 2020 г. в 16:41, Joop Kiefte <iko...@gmail.com>:

[Denis Cheremisov]

It is because you import protoc-gen-go generated entities with exactly the same package name and their own name. This is not allowed with protobuf, you can only have a single <pkg name>.<entity name>. You can either use different names for error packages or use a 3rd repository with generated code.

среда, 30 сентября 2020 г. в 18:14:04 UTC+3, va...@selfip.ru:

[Joop Kiefte]

I suppose the best way is to use namespaced naming for the imported packages

Joop Kiefte - Chat @ Spike

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