I clicked thinking I was going to see some gnarly Lisp code. It's out there!
This, on the other hand, is perfectly legible if you know the language. I'd say it's even perfectly legible if you don't, but how would I know?
There are a couple good examples in there of what I said in another comment, about how, quite aside from getting the hang of reading and writing sexprs, one also has to learn a rather more foreign discipline of building up linked lists in the idiomatic way. Which is a greater barrier than learning to read `(and foo bar)` as `foo && bar`. That part really doesn't take long.
https://github.com/dimitri/pgloader/blob/master/src/pgsql/pg...