protoc-gen-grpckt is not recognized, on windows

[diddiman]

Hi all

I am trying to generate some code from my protos, currently my build.gradle look like this

plugins {
    id 'com.android.application'
    id 'org.jetbrains.kotlin.android'
    id 'com.google.protobuf' version '0.8.18'
}

android {
    compileSdk 31

    defaultConfig {
        applicationId "com.example.foodshoppinglist"
        minSdk 23
        targetSdk 31
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = '1.8'
    }
}
dependencies {
    compileOnly 'javax.annotation:javax.annotation-api:1.3.2'
    implementation("io.grpc:grpc-kotlin-stub:1.2.1")
    implementation("io.grpc:grpc-protobuf:1.44.0")
    implementation('com.google.protobuf:protobuf-kotlin:3.19.4')

    implementation 'androidx.core:core-ktx:1.7.0'
    implementation 'androidx.appcompat:appcompat:1.4.1'
    implementation 'com.google.android.material:material:1.5.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.1.3'
    testImplementation 'junit:junit:4.13.2'
    androidTestImplementation 'androidx.test.ext:junit:1.1.3'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}

protobuf {
    protoc {
        artifact = "com.google.protobuf:protoc:3.19.4"
    }
    plugins {
        grpc {
            artifact = "io.grpc:protoc-gen-grpc-java:1.44.0"
        }
        grpck {
            artifact = "io.grpc:protoc-gen-grpc-kotlin:1.2.1"
        }
    }
    generateProtoTasks {
        all().forEach {
            it.plugins {
                grpc
                grpckt
            }
            it.builtins {
                "kotlin"
            }
        }
    }
}

I am running on windows 10, 64 bit. By no means i am any expert on this so i might be doing hundred of thing wrong. But when trying to rebuild project i get

Execution failed for task ':app:generateDebugProto'.
> protoc: stdout: . stderr: 'protoc-gen-grpckt' is not recognized as an internal or external command,
  operable program or batch file.
  --grpckt_out: protoc-gen-grpckt: Plugin failed with status code 1.

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

Does anyone have any idea what's wrong? Is there a bug or am i just doing everything wrong?

[jamesward]

For the grpck artifact, try:

artifact = "io.grpc:protoc-gen-grpc-kotlin:1.2.1:jdk7@jar"

[diddiman]

Tried it now, seems to give the same error

[jamesward]

Odd. Can you try the examples and see if it works (ie ./gradlew :stub:build): https://github.com/grpc/grpc-kotlin/tree/master/examples

[diddiman]

That seems to work better:

PS C:\dev\grpc-kotlin\examples> ./gradlew :stub:build
Starting a Gradle Daemon, 1 incompatible and 1 stopped Daemons could not be reused, use --status for details

BUILD SUCCESSFUL in 24s
17 actionable tasks: 7 executed, 10 up-to-date

[jamesward]

Cool. How about from within Android Studio / IntelliJ?

[diddiman]

Do you mean that i should open a terminal in Android Studio and run in there? if yes

C:\dev\grpc-kotlin\examples>gradlew :stub:build

BUILD SUCCESSFUL in 2s
17 actionable tasks: 17 up-to-date

[jamesward]

Your original message made it seem like you were running the build from Android Studio (a menu). Can you run the build in the same way on the examples?

[diddiman]

That seems to work, hmmm

[jamesward]

Ok, so something different between the gradle setups. But it is hard to tell because of the differences between the groovy & kotlin build DSLs.

[diddiman]

I'm starting to copy the stuff from the example-setup that seems necessary. Let's see where i end up

[pddg]

@diddiman It may just be a typo, but isn't it grpck instead of grpckt?

↓ The following is an excerpt from the sample you provided.

    plugins {
        grpc {
            artifact = "io.grpc:protoc-gen-grpc-java:1.44.0"
        }
        grpck {
            artifact = "io.grpc:protoc-gen-grpc-kotlin:1.2.1"
        }
    }

[JavierSegoviaCordoba]

@jamesward I am unable to get this working.

Is it not possible to get a simpler setup for Gradle?

[jamesward]

@JavierSegoviaCordoba Here is a more basic project that might help you get things going: https://github.com/GoogleCloudPlatform/kotlin-samples/tree/main/run/grpc-hello-world-gradle

It also uses latest versions which changes some syntax in the build.