I was working on this a while back but didn't get around to having a working plugin until now.
public $components = array('Shopify.ShopifyAuth', 'Shopify.ShopifyAPI');
I don't have much time to do everything I want with it, but maybe this will spark someone to continue building it.
The goal would be to have the ability to make Shopify Apps with CakePHP as quickly and as easily as a RoR app.
Also, I've dealt with a number of clients that hired be for private apps that already had hosting with PHP. So, to me, this seemed like a logical extension to saving the clients some costs.
Colin