Can I write gradle buildSrc in Kotlin?

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I'd like to write my Gradle buildSrc in Kotlin instead of Java, since everything else is Kotlin too.

I've tried .kt files in buildSrc/src/main/kotlin and in buildSrc/src/main/java, but neither will be compiled. IntelliJ does recognize them at least when I put them in /java, but they are not found when running Gradle tasks.

So, how do I make Gradle look at Kotlin build sources?

gradle-kotlin-dsl kotlin gradle
1 Answers

buildSrcis treated as an included build, and you can use any supported language inside this project, as long as you apply the needed plugins.

Following setup should work :

buildSrc/build.gradle

plugins {
    id("org.jetbrains.kotlin.jvm") version "1.3.72"
}
repositories {
    mavenCentral()
}

custom task:

buildSrc/src/main/kotlin/tasks/MyKtTask.kt

package tasks

import org.gradle.api.DefaultTask
import org.gradle.api.tasks.TaskAction

open class MyKtTask : DefaultTask() {

    @TaskAction
    fun execute() {
        println("kotlin tasks executed")
    }

}

Using the custom task:

build.gradle

task "testKt" (type: tasks.MyKtTask){
    doLast{
        // do something
    }
}
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