Update Google Ads Docker file paths

[blowmage]

Update the Google Ads docker image to change the file paths of the files generated by the protobuf and grpc plugins.

[quartzmo]

Any chance of some echo calls to print what's happening?

[blowmage]

Any chance of some echo calls to print what's happening?

Make some suggestions in the code. I don't know what you are looking for.

[quartzmo]

OK, just a sec, I'll open suggestions

[blowmage]

The docker image calls protoc with all three plugins: 1) protobuf, 2) grpc, and 3) gapic. The gapic generator can't alter the output of the other two plugins, so this PR updates the docker image to alter the output for all three protoc plugins.

For example, the protobuf plugin will take the proto file google/ads/googleads/v1/services/campaign_service.proto and generate the ruby file google/ads/googleads/v1/services/campaign_service_pb.rb The docker image then renames it to google/ads/google_ads/v1/services/campaign_service_pb.rb.

Then, the grpc plugin takes the same proto file google/ads/googleads/v1/services/campaign_service.proto and generate the ruby file google/ads/googleads/v1/services/campaign_service_services_pb.rb, with a require for the generated protobuf file google/ads/googleads/v1/services/campaign_service_pb.rb. The docker image then renames the file to google/ads/google_ads/v1/services/campaign_service_services_pb.rb, and updates the require to match the previously renamed file.

The generated gapic files require both the generated protobuf and grpc files, and those requires are also updated.

Lastly, the files generated by the protobuf plugin also reference the original proto file. It has code similar to the following:

add_file("google/ads/googleads/v1/services/campaign_service.proto", :syntax => :proto3) do
  # add messages
end

The file path of original proto file referenced in the ruby code is not changed, even though the generated ruby files are.