flake.nix

{
  description = "An Emacs major mode for editing Nix expressions, powered by tree-sitter.";

  outputs =
    { nixpkgs-unstable
    , pre-commit-nix
    , ...
    }:
    let
      supportedSystems = [
        "aarch64-darwin"
        "aarch64-linux"
        "x86_64-darwin"
        "x86_64-linux"
      ];
      forAllSystems = nixpkgs-unstable.lib.genAttrs supportedSystems;
    in
    {
      supportedEmacsVersions = import ./nix/emacs-versions.nix;

      devShells = forAllSystems (system:
        let
          pre-commit-check = pre-commit-nix.lib.${system}.run {
            src = ./.;

            hooks = {
              nixpkgs-fmt.enable = true;
              deadnix.enable = true;
              statix.enable = true;
            };
          };
        in
        {
          default = nixpkgs-unstable.legacyPackages.${system}.mkShell {
            name = "nix-ts-mode-shell";

            packages = with nixpkgs-unstable.legacyPackages.${system}; [ nixpkgs-fmt cask python311 ];

            shellHook = ''
              ${pre-commit-check.shellHook}
            '';
          };
        });

      formatter = forAllSystems (system: nixpkgs-unstable.legacyPackages.${system}.nixpkgs-fmt);
    };

  inputs = {
    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    pre-commit-nix.url = "github:cachix/pre-commit-hooks.nix";
  };
}