impl: devtools/cmd/generate,testdata: add command to run protoc-gen

[julieqiu]

No description provided.

[coryan]

I think we should not merge the files that we are not going to use (**/BUILD.bazel and **_grpc_service_config.json. Maybe there is a good reason to merge them?

We also seem to have 3 different ways to generate the golden files now: this, my changes in #66, and the explicit call to protoc.

[coryan]

There is the metaphysical discussion around what is the copyright year for a copy of a file. LOL.

Alternative: we could use a git submodule and reference github.com/googleapis/googleapis instead of copying a few files

[julieqiu]

I considered this option but I thought that it might be nice to just limit to the set of files we need so the input is clear. Happy to change this later on though

[julieqiu]

I think we should not merge the files that we are not going to use (**/BUILD.bazel and **_grpc_service_config.json. Maybe there is a good reason to merge them?

We also seem to have 3 different ways to generate the golden files now: this, my changes in #66, and the explicit call to protoc.

What do you think about moving everything under testdata/

We could have the structure:

testdata/
    googleapis/...
    openapi/secretmanager_openapi_v1.json
    golden/ 
       rust/
       go/

I can move this in a follow up PR if that seems good to you.

[coryan]

I think we should not merge the files that we are not going to use (**/BUILD.bazel and **_grpc_service_config.json. Maybe there is a good reason to merge them?
We also seem to have 3 different ways to generate the golden files now: this, my changes in #66, and the explicit call to protoc.

What do you think about moving everything under testdata/

We could have the structure:

testdata/
    googleapis/...
    openapi/secretmanager_openapi_v1.json
    golden/ 
       rust/
       go/

I can move this in a follow up PR if that seems good to you.

A single location SGTM. In case you missed this: we will need more than one golden/rust/ and golden/go/ directories because we will generate files with conflicting names from OpenAPI and from Protobuf.