class CustomEventLogger extends BuildAdapter implements TaskExecutionListener {
	public void beforeExecute(Task task) {
		println "beforeExecute(): " + task + ": " + commandLine
	}
	public void afterExecute(Task task, TaskState state) {
	}
	public void buildFinished(BuildResult result) {
		println 'build completed'
	}
}
useLogger(new CustomEventLogger())