make proto_compile accept additional args?

[perezd]

I think it would be nice to allow users to provide custom arguments to protoc. Currently, there doesn't seem to be a way to do it.

My current use case, I'm trying to generate only a proto descriptor set using the following:

proto_compile(
  name = "person_proto",
  protos = ["person.proto"],
  langs = [],
  args = [
    "--include_imports",
    "--include_source_info",
  ],
)

With the hope that this would result in the following command:
protoc --include_imports --include_source_info person.proto --descriptor_set_out person.descriptor_set

However, I can't figure out a way to make the args attr available to protoc. What do you think about this idea?

[pcj]

It is possible to add arbitrary arguments to a proto_language via the pb_options attribute, but you are explicitly not using langs. I didn't anticipate that use case, but I agree it should be possible. I'll put together a PR for this.

[AmandaCameron]

Not sure this is the right place to do this, but I have a similar-ish request, but more tuned to the individual plugins. For example, if I wanted to take advantage of the flag this grpc-gateway PR adds, I'd have no idea where I'd even start that process.