Diva - D Language Interface for Versioned Applications

[pineapple via Digitalmars-d-announce]

Basically, it's a version manager which currently supports DMD, 
LDC, and dub.

It's rough, but maybe in some ways a little less rough than 
install.sh, at https://dlang.org/install.html

https://github.com/pineapplemachine/diva