nix-configs/modules/common/nix.nix

{pkgs, lib, inputs, config, ...}: {
  environment.systemPackages = with pkgs; [
    nix-output-monitor
  ];
  programs.git.enable = true;
  nix = let
    flakeInputs = lib.filterAttrs (_: lib.isType "flake") inputs;
  in {
    settings = {
      experimental-features = [ "nix-command" "flakes" ];
      flake-registry = "";
      nix-path = config.nix.nixPath;
    };
    gc = {
      automatic = true;
      options = "--delete-older-than 30d";
      dates = "weekly";
    };
    optimise.automatic = true;
    registry = lib.mapAttrs (_: flake: {inherit flake;}) flakeInputs;
    nixPath = lib.mapAttrsToList (n: _: "${n}=flake:${n}") flakeInputs;
  };
  system.autoUpgrade = {
    enable = true;
    flake = "git+https://git.icanttype.org/cdombroski/nix-configs.git";
    allowReboot = true;
    rebootWindow = { lower = "02:00"; upper = "06:00"; };
  };
}