Grunt time tasks

  var oldRunTaskFn = grunt.util.task.Task.prototype.runTaskFn;
  grunt.util.task.Task.prototype.runTaskFn = function () {
    var taskName = arguments[0].name
    var invokeFn = arguments[1];
    var asyncFn = arguments[2];
    var start = (new Date()).getTime();

    // New Async "Done" function
    var newAsyncFn = function () {
      fs.appendFileSync('.tmpBuildSteps', [start, (new Date()).getTime(), taskName].join(',') + '\n');
      asyncFn.apply(this, arguments);
    }

    // Overwrite function argument
    // So we can track when task completes
    if (typeof asyncFn === 'function') {
      arguments[2] = newAsyncFn;
    }

    // Call original
    oldRunTaskFn.apply(this, arguments);
  };