Box is an advanced builder for Docker powered by mruby with many features for manipulating layers and powerful building primitives. box is a single static binary (or container for those of you on OS X).
This is my first submission to HN so please be kind. :) Been working on this for ~6 months now. I hope to make this a compelling alternative to `docker build`, especially for upcoming OCI needs. Suggestions for improvement are very welcome!
Give it a shot! :)