1. Development

The preferred way to develop mapv and fold is using Nix and direnv.

direnv allow

Once the development shell is active, the fold binary can either be built using dune or Nix.

# build and run
dune build --profile release
./_build/install/default/bin/fold
# or
nix build .#fold
./result/bin/fold

# build and run in one go
dune exec --profile release fold
# or
nix run .#fold

The mapv library is available as a package that can be used as follow:

# Add mapv to inputs
inputs.mapv.url = "git+https://codeberg.org/debarchito/mapv";

# Using the overlay
overlays = [
  inputs.mapv.overlays.default
];
# then
buildInputs = [
  pkgs.ocamlPackages.mapv
]

# or, inline it directly
buildInputs = [
  inputs.mapv.packages.${system}.mapv
                       # ^ don't forget to make sure "system" is defined! 
];

NOTE: We do not use opam. Instead, add the required dependencies to dune-project and invoke dune build. This will fail the first time but prepare mapv.opam and/or fold.opam accordingly. Now, to install the dependencies, invoke direnv reload and they'll be made available for all subsequent dune build and nix build/nix run invocations.

2. Formatting

nix fmt
# or
nix run .#fmt
# or
fd -e ml -e mli --exclude _build | xargs ocamlformat --inplace

3. Licensing

mapv is licensed under GNU LGPLv3 only while fold is licensed under GNU GPLv3 only.