Prints name and class of each executed task.

init.gradle

// Example use: gradle -I init.gradle clean assembleDebug

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

Original code: https://discuss.gradle.org/t/how-do-i-easily-print-commands-being-run-by-exec-tasks/6440
Docs: https://docs.gradle.org/current/userguide/logging.html