Prune Repo Bloat

[acedrew]

Since the FMU files are all binary, git's only way of managing them is to save a copy everytime they change. It would be nice to occasionally prune the repo, as it sits at 3.5GB on my machine, and 2.5GB of that is in the .git revision history. While it may slow CI, a future improvement may be to only distribute the scripts to generate the FMUs, so as to avoid future management headaches. CI could reference a cloud binary cache if needed.