Pre-execution and post-execution "hooks" for Grunt

pre-and-post-grunt-hook.js

var grunt = require('grunt');
var hooker = require('hooker');

module.exports = preAndPostHook = function () {
   var currentTask = undefined;
   
   /** 
    * Do something when the task has sta.
    * @param taskName The task name.
    */
   function taskStartCallback(taskName) {
    // do something 
     currentTask = taskName;
   }
   
   /** 
    * Do something when the task has finished.
    * @param taskResult <code>true</code> if successful, else <code>false</code>.
    */
   function taskEndCallback(taskResult) {
     currentTask = undefined;
     // do something  
   }
   
  /** Hook into the grunt task runner. */
  hooker.hook(grunt.task, 'runTaskFn', {
    pre: function (context) {
      var taskName = context.nameArgs;
      if (currentTask !== undefined) {
        taskEndCallback(true); // true indicates the task has finished successfully.
      }
      taskStartCallback(taskName);
    }
  });
  
  /** Hook into the success / fail writer. */
  hooker.hook(grunt.log.writeln(), ['success', 'fail'], function (res) { // check done or aborted
    var done = res === 'Done, without errors.';
    var warning = res === 'Done, but with warnings.';
    var aborted = res === 'Aborted due to warnings.';
    var error = warning || aborted;

    if (done || error) {
      if (currentTask !== undefined) {
        taskEndCallback(error ? false : true);
      }
    }
  });
  
  /** Hook into the fatal writer. */
  hooker.hook(grunt.fail, 'fatal', function () { // in case of a real failure
    if (currentTask !== undefined) {
      taskEndCallback(false);
    }
  });
}

Hi, is it possible to get an example of this wrapping a grunt.task.run('taskname')? Having trouble getting the syntax right.