How can I compile proto files using Protobuf Editions

[yanivkr]

Im using the plugin wit 4.26.0 protoc version and I try to compile a file that looks like this:

edition = "2023";

package foo;

message TestEditionMessage {
    string message = 1;
}

and it results with the following error:

protoc: stdout: . stderr: TestEdition.proto: This file uses editions, but --experimental_editions has not been enabled. This syntax is experimental and should be avoided.

Is there a way to pass this flag to the proto compiler?

[yonik]

If using cmake, use the PROTOC_OPTIONS in protobuf_generate. Example:

protobuf_generate(TARGET myproto LANGUAGE cpp
        PROTOC_OPTIONS --experimental_editions)
protobuf_generate(TARGET myproto LANGUAGE grpc GENERATE_EXTENSIONS .grpc.pb.h .grpc.pb.cc PLUGIN "protoc-gen-grpc=${grpc_cpp_plugin_location}"
        PROTOC_OPTIONS --experimental_editions)

[waqaslam]

If using cmake, use the PROTOC_OPTIONS in protobuf_generate. Example:

protobuf_generate(TARGET myproto LANGUAGE cpp
        PROTOC_OPTIONS --experimental_editions)
protobuf_generate(TARGET myproto LANGUAGE grpc GENERATE_EXTENSIONS .grpc.pb.h .grpc.pb.cc PLUGIN "protoc-gen-grpc=${grpc_cpp_plugin_location}"
        PROTOC_OPTIONS --experimental_editions)

any idea how we can fix the issue in windows?

[waqaslam]

For windows, I got it fixed by using a newer version of protoc.

artifact = 'com.google.protobuf:protoc:4.29.0'

[scr-oath]

This plugin is a gradle plugin - I'm not quite sure where cmake would come into the mix here. I tried upgrading to the latest protoc, but I can't figure out how to pass the --experimental_editions flag. It seems that only options (things added to the --language_out flag) are allowed/documented.

    protoc {
        artifact = "com.google.protobuf:protoc:4.29.1"
    }