Re: Go protobuf v2

[Clément Hermann <nodens@debian.org>]

On 07/07/2020 20:29, Shengjing Zhu wrote:
> Hi,
>
> The Go team is working on a new protobuf package.
> https://blog.golang.org/protobuf-apiv2
>
> In short, there are two Go libraries and protoc compiler plugins.
> 1. protoc-gen-go
>
> The old one is github.com/golang/protobuf/protoc-gen-go.
> The new one is google.golang.org/protobuf/cmd/protoc-gen-go.
>
> They share the same binary name. As the protoc compiler searches
> plugins by its name, so we shouldn't change them.
>
> The old one supports generating grpc, the new one won't. (The new grpc
> plugin will be google.golang.org/grpc/cmd/protoc-gen-go-grpc, in
> grpc-go repo).
>
> If golang/protobuf 1.4+ is used, the resulting pb.go files are the
> same most of the time. And the pb.go imports both
> google.golang.org/protobuf and github.com/golang/protobuf.
>
> 2. runtime library
>
> github.com/golang/protobuf v1.4+ (sid has v1.3.4) is built on top of
> google.golang.org/protobuf.
>
>
> Current situation:
>
> google.golang.org/protobuf is in sid now.
> https://tracker.debian.org/pkg/golang-google-protobuf
> With protoc plugin package name: protoc-gen-go, library name
> golang-google-protobuf-dev.
>
> protoc-gen-go conflicts golang-goprotobuf-dev (both have
> /usr/bin/protoc-gen-go).
>
>
> If bump github.com/golang/protobuf to v1.4:
>
> There's no problem if we only care about the old protoc plugin. As
> golang-goprotobuf-dev can co-install with golang-google-protobuf-dev.
>
> + src:golang-goprotobuf B-D golang-google-protobuf-dev
> + golang-goprotobuf-dev Depends golang-google-protobuf-dev
>
> Packages use them:
> B-D golang-goprotobuf-dev (and implicit golang-google-protobuf-dev)
>
> It looks good.
>
> But for the new protoc plugin:
> Packages use it:
> B-D protoc-gen-go, golang-google-protobuf-dev, golang-goprotobuf-dev
> (since the pb.go import both)
> So it can't be satisfied, as protoc-gen-go conflicts golang-goprotobuf-dev.
>
>
> To move forward:
> I think we can split src:golang-goprotobuf to:
> protoc-gen-go-legacy(has /usr/bin/protoc-gen-go) and
> golang-github-google-protobuf-dev.
>
> So packages use protoc plugin can:
> B-D protoc-gen-go, golang-google-protobuf-dev,
> golang-github-google-protobuf-dev.
>
> Any suggestions?
>
Not really, sounds like the best plan available to me.
Do we know how many package are affected, currently ?

Cheers,

-- 
nodens