GWS - Git Workspace
Have you ever used Git submodules? Then you know the pain they bring... If you
just want to keep some Git repos together organized, then GWS - Git Workspace
[https://streakycobra.github.io/gws/] is for you!
UPDATE: See How VSHN manages Hiera data files
[https://speakerdeck.com/tobru/how-vshn-manages-hiera-data-files]