Collect and print tasks execute times

TaskExecTimeLogger.gradle

//
// Collect and print tasks execute times
// init: addExecTimeLogger 50
//
ext.addExecTimeLogger = { minExecutionTime ->
    gradle.addListener new TaskExecTimeLogger(minExecutionTime)
}

public class TaskExecTimeLogger implements TaskExecutionListener, BuildListener {
    private Clock clock
    private def taskTimes = [:]
    private def minExecutionTime

    public TaskExecTimeLogger(minExecutionTime){
        this.minExecutionTime = minExecutionTime
    }

    @Override
    void beforeExecute(Task task) {
        clock = new Clock()
    }

    @Override
    void afterExecute(Task task, TaskState taskState) {
        def ms = clock.timeInMs
        taskTimes[task.path] = ms;
    }

    @Override
    void buildFinished(BuildResult result) {
        println "Task timings:"
        taskTimes.each { taskTime ->
            if(taskTime.value >= minExecutionTime) {
                printf "%7sms  %s\n", taskTime.value, taskTime.key
            }
        }
    }

    @Override
    void buildStarted(Gradle gradle) {}

    @Override
    void projectsEvaluated(Gradle gradle) {}

    @Override
    void projectsLoaded(Gradle gradle) {}

    @Override
    void settingsEvaluated(Settings settings) {}
}