feat(rumdl): Add support for rumdl

[szaffarano]

Fixes #644

[szaffarano]

not related to this PR, but the linter marked it as unused, so I removed it.

[JaanJah]

This PR seems to break my devShell:

EDIT: I am using NixOS 25.05

error:
       … while calling the 'derivationStrict' builtin
         at <nix/derivation-internal.nix>:37:12:
           36|
           37|   strict = derivationStrict drvAttrs;
             |            ^
           38|

       … while evaluating derivation 'nix-shell'
         whose name attribute is located at /nix/store/cd6v80pj9h7r2prxx9a71y92zq88p1xx-source/pkgs/stdenv/generic/make-derivation.nix:541:13

       … while evaluating attribute 'buildInputs' of derivation 'nix-shell'
         at /nix/store/cd6v80pj9h7r2prxx9a71y92zq88p1xx-source/pkgs/stdenv/generic/make-derivation.nix:593:13:
          592|             depsHostHost = elemAt (elemAt dependencies 1) 0;
          593|             buildInputs = elemAt (elemAt dependencies 1) 1;
             |             ^
          594|             depsTargetTarget = elemAt (elemAt dependencies 2) 0;

       … while evaluating the option `enabledPackages':

       … while evaluating the option `hooks.nixfmt-rfc-style.package':

       … while evaluating the option `tools':

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: evaluation aborted with the following error message: 'lib.customisation.callPackageWith: Function called without required argument "rumdl" at /nix/store/w2xlf26gzgnayh4rqm8gixwqnr5hswvk-source/nix/tools.nix:74, did you mean "mdl", "rml" or "rund"?'

Relevant part of my NixOS flake:

      checks = forAllSystems (system: {
        pre-commit-check = inputs.pre-commit-hooks.lib.${system}.run {
          src = ./.;
          hooks = {
            nixfmt-rfc-style = {
              enable = true;
              excludes = [
                "hardware-configuration\\.nix$"
                "plasma\\.nix$"
              ];
            };
          };
        };
      });


      # Enter a development shell with `nix develop`.
      # The hooks will be installed automatically.
      # Or run pre-commit manually with `nix develop -c pre-commit run --all-files`
      devShells = forAllSystems (system: {
        default =
          let
            pkgs = nixpkgs.legacyPackages.${system};
            inherit (self.checks.${system}.pre-commit-check) shellHook enabledPackages;
          in
          pkgs.mkShell {
            inherit shellHook;
            buildInputs = enabledPackages;
          };
      });
    };

[szaffarano]

It's due to an outdated nixpkgs, check #665

[JaanJah]

Thanks, I will just use older revision of git-hooks.nix until it gets a fixed then.