Steps to reproduce:

1. Prepare simple project with Twirp rpc proto
2. Execute

    protoc --go_out=out ­­–go_opt=paths=import,module=example.com/module/package \
        ­­--twirp_out=out --twirp_opt=paths=import,module=example.com/module/package service.proto
   

Expected result

Normal code generation

Actual result

The error:

Failure: plugin twirp: Generated file name "/somepath/service.twirp.go" does not conform to the Protobuf generation specification. Note that the file name must be relative, and not use "..". Please raise an issue with the maintainer of the plugin and reference https://github.com/protocolbuffers/protobuf/blob/95e6c5b4746dd7474d540ce4fb375e3f79a086f8/src/google/protobuf/compiler/plugin.proto#L122

Note

There were no errors from protoc_gen_go plugin, so path options are correct.