My colleague @ejholmes wrote a cool tool that borrows heavily from `make` called `walk` (https://github.com/ejholmes/walk https://github.com/ejholmes/walk). It'

My colleague @ejholmes wrote a cool tool that borrows heavily from `make` called `walk` (https://github.com/ejholmes/walk https://github.com/ejholmes/walk). It's written in Go and using a graph for dependencies so that tasks at the same horizontal level in the graph may be run at the same time. We use this at remind.com to significantly speed up our multi later AMI build times.