[benreesman]

This is the nastiest one in my `libmodern-cpp` suite: https://gist.github.com/b7r6/31a055e890eaaa9e09b260358da897b....

It took a few minutes, probably has a few edge cases I haven't banged out yet, and now I get to `-l` and I can deploy with `rsync` instead of fucking Docker or something.

I take that deal.