Generate Kotlin source for .proto messages?

[charbgr]

Is there a way to generate Kotlin files from a proto3 message? Like Java's protoc but for Kotlin files?

[chalin]

Once your gradle file is setup (for example, see examples/build.gradle), then protoc will generate Kotlin sources from .proto files as part of the build.

If you build the Hello World example, the Kotlin source generated from

• examples/src/main/proto/hello_world.proto

will end up in

• examples/build/generated/source/proto/main/grpckt/io/grpc/examples/helloworld/HelloWorldGrpcKt.kt:

  

[pavlospt]

@chalin I think what @charbgr meant, is if we are going to see in the near future, generation of .proto messages in Kotlin. Right now the gRPC Service stub is generated in Kotlin but the used messages are generated in Java.

[chalin]

Oh right -- so you really did mean to ask about messages in your original question. I'll let @lowasser answer in that case.

[lowasser]

We are deliberately separating the choice of Kotlin APIs for gRPC and the choice of Kotlin APIs for protobuf, as projects may choose to use one but not the other.

Support for Kotlin protos is being discussed in protocolbuffers/protobuf#3742.

[chalin]

Given that this is being discussed elsewhere, can we close this issue?

[chalin]

Support for Kotlin protos is being discussed in protocolbuffers/protobuf#3742.

FYI, we've added a note to the README about this (#70).