how I processed these files
build the ppx using dune
ran it
find -name \*.ml -exec ./_build/default/.ppx/1977eb4d6c4f6ad3b912f65add506a08/ppx.exe {} > /dev/null \;
find -name \*.str > files.txt
tar -cf json.tar -T files.txt
mkdir ~/2023/12/28/ppxlib/ocaml-opam-ppxlib-json-ast/dune/df
tar -xf json.tar -C ~/2023/12/28/ppxlib/ocaml-opam-ppxlib-json-ast/dune/
find -name \*.mli -exec ~/2024/08/14/dune/_build/default/.ppx/1977eb4d6c4f6ad3b912f65add506a08/ppx.exe {} > /dev/null \;
find -name \*.sig > sigfiles.txt
tar -vcf ~/2023/12/28/ppxlib/ocaml-opam-ppxlib-json-ast/ocaml/sigjson.tar -T sigfiles.txt
cd ~/2023/12/28/ppxlib/ocaml-opam-ppxlib-json-ast/ocaml/
tar -xf sigjson.tar