flake/modules/nixos/core/nix.nix

{ pkgs, lib, config, inputs, system, ... }: {
  options = {
    mods.nix.upgrade.enable = lib.mkEnableOption "enables nix auto upgrade";
    mods.nix.clean.enable = lib.mkEnableOption "enables nix auto cleaning";
  };

  config =
    let flake = "${config.environment.sessionVariables.XDG_CONFIG_HOME}/home";
    in {
      system.autoUpgrade = {
        enable = config.mods.nix.upgrade.enable;
        flake = flake;
        flags = [ "--commit-lock-file" "-L" ];
        dates = "02:00";
        randomizedDelaySec = "45min";
      };

      programs.nh = {
        enable = true;
        clean.enable = config.mods.nix.clean.enable;
        clean.extraArgs = "--keep-since 4d --keep 3";
        flake = flake;
      };

      nix.settings.experimental-features = [ "nix-command" "flakes" ];
      nix.settings = {
        substituters = [
          "https://cache.nixos.org"
          "https://nix-community.cachix.org"
          "https://nixpkgs-unfree.cachix.org"
          "https://hyprland.cachix.org"
        ];
        trusted-public-keys = [
          "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
          "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
          "nixpkgs-unfree.cachix.org-1:hqvoInulhbV4nJ9yJOEr+4wxhDV4xq2d1DK7S6Nj6rs="
          "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
        ];
      };

      environment.systemPackages = with pkgs; [
        inputs.nix-alien.packages.${system}.nix-alien
        colmena
      ];
      programs.nix-ld.enable = true;
    };
}