Auto-Compile .proto Files

[i5kender]

What are you trying to achieve?

I can manually convert .proto files to .grpc.swift and .pb.swift files with gRPC-Swift-Plugins.
I would like to automate the whole process.

What have you tried so far?

1- I manually copied the .proto files into the project directory.

2- I created a build rules.

3. The .grpc.swift and .pb.swift files are created during building.
   

The build cannot be completed successfully and I get the following error.

error opening input file '/Library/Developer/Xcode/DerivedData/Smyrna-crvgddjdfhycebbfwtioteccgohr/Build/Intermediates.noindex/Smyrna.build/Debug-iphonesimulator/smyrna.build/DerivedSources/UserModel.grpc.swift' (No such file or directory)

In Addition,
When i try to create the file(UserModel.grpc.swift) manually it doesn't occur anyway.
protoc --grpc-swift_out=. UserModel.proto

I think, unable to create .grpc.swift file because it consists of model only.

How can I fix this error ?

Thanks

[FranzBusch]

The problem you are running into here is that we don't generate empty files when there are no service definitions in the proto file. We could certainly add an option to the plugin to always generate empty files even if there is no service definition in the proto file.
The code for this lives here: https://github.com/grpc/grpc-swift/blob/bf6065fc97c2ead57073d6d556cbb83daa60aa66/Sources/protoc-gen-grpc-swift/main.swift#L138C28-L138C28

Would you be open to raise a PR to add support for this?

Additionally, we would also recommend you to take a look at our SPM plugin and see if you could use that instead: https://github.com/grpc/grpc-swift/blob/main/Sources/protoc-gen-grpc-swift/Docs.docc/spm-plugin.md