nix/modules/base.nix

{
  inputs,
  lib,
  pkgs,
  username,
  ...
}: let
  packageSets = import ../lib/package-sets.nix {inherit inputs lib pkgs;};
in {
  nix.enable = true;

  nix.settings = {
    auto-optimise-store = true;
    experimental-features = [
      "nix-command"
      "flakes"
    ];
    trusted-users = [
      "@admin"
      username
    ];
    use-xdg-base-directories = true;
  };

  nix.gc =
    {
      automatic = true;
      options = "--delete-older-than 14d";
    }
    // (
      if pkgs.stdenv.isDarwin then
        {
          interval = {
            Weekday = 7;
            Hour = 3;
            Minute = 0;
          };
        }
      else
        {
          dates = "weekly";
        }
    );

  nixpkgs.config.allowUnfree = true;

  programs.zsh.enable = true;
  environment.shells = [pkgs.zsh];

  environment.systemPackages = packageSets.core;

  environment.variables = {
    EDITOR = "nvim";
    VISUAL = "nvim";
  };
}