Task TimingsListener Kotlin DSL

TimingsListener.kts

// Log timings per task.
class TimingsListener : TaskExecutionListener, BuildListener {
    private var startTime: Long = 0L
    private val timings = mutableListOf<Pair<Long, String>>()

    @Override
    override fun beforeExecute(task: Task) {
        startTime = System.nanoTime()
    }

    @Override
    override fun afterExecute(task: Task, taskState: TaskState) {
        val ms = TimeUnit.MILLISECONDS.convert(System.nanoTime() - startTime, TimeUnit.NANOSECONDS);
        timings.add(ms to task.path)
        task.project.logger.warn("${task.path} took ${ms}ms")
    }

    @Override
    override fun buildFinished(result: BuildResult) {
        println("Task timings:")
        for (timing in timings) {
            if (timing.first >= 50) {
                println("%7sms  %s".format(timing.first, timing.second))
            }
        }
    }

    override fun projectsEvaluated(gradle: Gradle) {}

    override fun projectsLoaded(gradle: Gradle) {}

    override fun settingsEvaluated(settings: Settings) {}
}

gradle.addListener(TimingsListener())