Enable Scala kind projector in a Gradle build

kind-projector.gradle

// This enables kind projector (https://github.com/typelevel/kind-projector) in a Gradle build.
// Versions used: Gradle 6.0.1, Scala 2.13.1.

ext {
    scalaVersionFull = '2.13.1'
    scalaVersion = '2.13'
}

configurations {
    kindProjectorPlugin
}

dependencies {
    implementation "org.scala-lang:scala-library:${scalaVersionFull}"
    kindProjectorPlugin group: 'org.typelevel', name: "kind-projector_${scalaVersionFull}", version: '0.11.0'
}

tasks.withType(ScalaCompile) {
    scalaCompileOptions.additionalParameters = [
        "-Xplugin:" + configurations.kindProjectorPlugin.asPath,
    ]
}

For anyone searching for what this looks like in Kotlin DSL:

build.gradle.kts:

plugins {
  scala
  //...
}

object Versions {
  const val ScalaBinary = "2.13"
  const val Scala = "2.13.5"
  //...
}

val kindProjectorPlugin by configurations.creating

dependencies {
  kindProjectorPlugin("org.typelevel:kind-projector_${Versions.Scala}:0.11.3")
  implementation("org.scala-lang:scala-library:${Versions.Scala}")
  //...
}

tasks {
  compileScala {
    scalaCompileOptions.additionalParameters = listOf(
      "-Xplugin:" + kindProjectorPlugin.asPath
    )
  }
  //...
}

> ./gradlew --version

------------------------------------------------------------
Gradle 6.8.3
------------------------------------------------------------

Build time:   2021-02-22 16:13:28 UTC
Revision:     9e26b4a9ebb910eaa1b8da8ff8575e514bc61c78

Kotlin:       1.4.20
Groovy:       2.5.12
Ant:          Apache Ant(TM) version 1.10.9 compiled on September 27 2020
JVM:          1.8.0_275 (AdoptOpenJDK 25.275-b01)
OS:           Mac OS X 10.15.7 x86_64