Jar repackageTask = makeTask("repackMinecraft", Jar.class);
{
repackageTask.from(recompSrc);
repackageTask.from(recompCls);
repackageTask.exclude("*.java", "**/*.java", "**.java");
repackageTask.dependsOn(recompTask);
// file output configuration done in the delayed configuration.
repackageTask.onlyIf(onlyIfCheck);