"tasks.withType" that do not extend "*Task" such as "JavaForkOptions"

[jaredsburrows]

This works in Groovy DSL, build.gradle:

// Prevent forked processes from stealing focus (on MacOS at least)
tasks.withType(JavaForkOptions) {
  // should improve memory on a 64bit JVM
  jvmArgs "-XX:+UseCompressedOops"
  // should avoid GradleWorkerMain to steal focus
  jvmArgs "-Djava.awt.headless=true"
  jvmArgs "-Dapple.awt.UIElement=true"
}

This fails to work in Kotlin DSL, build.gradle.kts:

// Prevent forked processes from stealing focus (on MacOS at least)
tasks.withType<JavaForkOptions> {
  // should improve memory on a 64bit JVM
  jvmArgs "-XX:+UseCompressedOops"
  // should avoid GradleWorkerMain to steal focus
  jvmArgs "-Djava.awt.headless=true"
  jvmArgs "-Dapple.awt.UIElement=true"
}

Since JavaForkOptions does not extend *Task, it will not work.

[jaredsburrows]

@bamboo Do you know how to configure this?

[eskatos]

tasks is a container of Task elements, it's withType() method only accept Task subtypes.
Your snippet works in Groovy as it is quite lax on type checking.

This should do using the Kotlin DSL:

tasks.all {
    when(this) {
        is JavaForkOptions -> {
            // should improve memory on a 64bit JVM
            jvmArgs("-XX:+UseCompressedOops")
            // should avoid GradleWorkerMain to steal focus
            jvmArgs("-Djava.awt.headless=true")
            jvmArgs("-Dapple.awt.UIElement=true")
        }
    }
}

[jaredsburrows]

@eskatos Thank you!

[sschuberth]

Is there a way to do this in a more elegant way when limiting ourselves to run tasks specifically?