Changes to r10k:
https://github.com/puppetlabs/r10k/compare/master...reidmv:puppet-environments-repo
What a "puppet-environments" repo looks like:
https://github.com/reidmv/puppet-environments
Specifically, the production environment:
https://github.com/reidmv/puppet-environments/blob/master/production/production.yaml