Marcin is a crazy fish.

gistfile1.groovy

def artifacts = []

addListener(new TaskExecutionAdapter() {
        void afterExecute(Task task, TaskState state) {

                if(task in AbstractArchiveTask) {
                        artifacts << task.outputs.files.singleFile
                }
        }
})

addBuildListener(new BuildAdapter() {
        void buildFinished(BuildResult result) {
                if(artifacts) {
                        println "\nOutput location: ${artifacts.last()}\n"
                }
        }
})