Creating an "exploded war" minus class files and dependencies

What’s the best way to place all the contents of the war, except for the class files and dependencies, into a folder?

Right now, I’ve got the following:

task prepForIdea(type: Sync) {
  destinationDir = file("$buildDir/forIdea")
  with war
gradle.taskGraph.whenReady { graph ->
  if (graph.hasTask(prepForIdea)) {
    rootProject.allprojects.each { prj ->
      prj.tasks.withType(JavaCompile) {
        it.enabled = false

It “works,” but it really feels really hacky. I also tried setting war.classpath = [], but then I lost all task dependencies. Both “solutions” also mean I can’t run both prepForIdea and war in the same Gradle run.

What’s the best way to do this?