Use grpc-kotlin as protoc plugin (CLI)

[Emixam23]

Hey !

I would like to know if this repo can be used as plugin for protoc? In fact I would like to generate the sources manually and using protoc, is that possible?

Thanks

[rouzwawi]

Hi @Emixam23. Yes this is possible on *nix type OSes currently by downloading the plugin artifact from the Maven repository.

Here's an example, using the test sources from the grpc-kotlin-test module.

mkdir -p example/src/main/{java,kotlin} && cd example
wget https://repo.maven.apache.org/maven2/io/rouz/grpc-kotlin-gen/0.1.2/grpc-kotlin-gen-0.1.2-jdk8.jar -O protoc-gen-grpc-kotlin.jar
chmod +x protoc-gen-grpc-kotlin.jar

# copy .proto sources into ./proto

protoc \
  -I=proto \
  --plugin=protoc-gen-grpc_kotlin=protoc-gen-grpc-kotlin.jar \
  --java_out=src/main/java \
  --grpc_kotlin_out=src/main/kotlin \
  ./proto/io/rouz/greeter.proto

Results in

tree .
.
├── proto
│   └── io
│       └── rouz
│           ├── greeter.proto
│           └── kvs.proto
├── protoc-gen-grpc-kotlin.jar
└── src
    └── main
        ├── java
        │   └── io
        │       └── rouz
        │           └── greeter
        │               ├── GreetReply.java
        │               ├── GreetReplyOrBuilder.java
        │               ├── GreetRequest.java
        │               ├── GreetRequestOrBuilder.java
        │               └── GreeterOuterClass.java
        └── kotlin
            └── io
                └── rouz
                    ├── greeter
                    │   ├── GreeterImplBase.kt
                    │   └── GreeterStubExt.kt
                    └── grpc
                        └── Adapters.kt