nixcfg/modules/darwin/system/interface/default.nix

{ options, config, pkgs, lib, ... }:

with lib;
with lib.metacfg;
let cfg = config.metacfg.system.interface;
in
{
  options.metacfg.system.interface = with types; {
    enable = mkEnableOption "macOS interface";
  };

  config = mkIf cfg.enable {
    system.activationScripts.applications.text = let
      env = pkgs.buildEnv {
        name = "system-applications";
        paths = config.environment.systemPackages;
        pathsToLink = "/Applications";
      };
    in
      lib.mkForce ''
      # Set up applications.
      echo "setting up /Applications..." >&2
      rm -rf /Applications/Nix\ Apps
      mkdir -p /Applications/Nix\ Apps
      find ${env}/Applications -maxdepth 1 -type l -exec readlink '{}' + |
      while read -r src; do
        app_name=$(basename "$src")
        echo "copying $src" >&2
        ${pkgs.mkalias}/bin/mkalias "$src" "/Applications/Nix Apps/$app_name"
      done
          '';

    system.defaults = {
      dock.autohide = true;

      finder = {
        AppleShowAllExtensions = true;
        FXEnableExtensionChangeWarning = false;
      };

      NSGlobalDomain = {
        _HIHideMenuBar = true;
        AppleShowScrollBars = "Always";
      };
    };

    metacfg.home.file.".hushlogin".text = "";
  };
}