Nice, looks very similar to Capistrano, but sometimes it's nice to stick with PHP if you're already using it.

The only problem I have with tools like this (and Capistrano) with most modern projects, is that there are usually a number of build steps related to getting production code in place, whether composer dependencies, or CSS/JS compilation, etc. With these tools, it's kinda hard to figure out how to implement this stuff, since they essentially just do a Git checkout on each server, and then run commands on each one. I kinda hate the idea of having tools to compile CSS/JS on each web server, and then each server running it's compilation separately. Has anyone come up with a clean way to separate these tasks from the task of deploying?