The very beginning of Gulp starts like a Grunt story: a Gulpfile.
It's the entry point that will be reached when executing gulp something.
You can imagine it as the factory map: by looking at it, you'll know exactly what'll happen with the factory's inputs and what they'll become at the end, depending on the production line they'll take from the stock to the expedition. Except that modifying the factory map modify directly the factory itself ;-)
Let's discover how we can populate such a file and write our master plan.