@nixCraft
Literally us at CERN last week. Crumpled together a bash script that executes GHDL test benches.
It even spits out JUnit XML by using hand crafted echo statements, and abuses `touch` and a subdirectory as binary hash map to mark test data.

And it works!
Easy to run anywhere since you really just need bash.
Sure it's an eye-sore, but it's a simple lean functional eye-sore.