Scala compiler options with Gradle

The purpose here is to bookmark this post which shows how to pass flags to the scalac compiler when using the Scala plugin with Gradle:

http://blog.vorona.ca/compile-options-for-scala-in-gradle.html

–

Here’s a sample build.gradle in full:

plugins {
    id "scala"
}

repositories {
    mavenCentral()
}

tasks.withType(ScalaCompile) {
    scalaCompileOptions.additionalParameters = ["-feature", "-language:implicitConversions"]
}

ext {
    scalaVersion = "2.13.0-M4"
}

dependencies {
    compile "org.scala-lang:scala-library:$scalaVersion"
    compile "org.scala-lang:scala-reflect:$scalaVersion"
}

As a reminder, man scalac will show all the available compiler options. They can also be accessed via the Scala docs: https://docs.scala-lang.org/overviews/compiler-options/index.html

To confirm it’s working sneak something like this into your code: trait Fancy[A[_]], then check the compiler output before and after adding the flags.