nixos-configs/modules/aerospace.nix

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

with lib;

let
  cfg = config.services.aerospace;
in
{
  options.services.aerospace = {
    enable = mkEnableOption "AeroSpace window manager system configuration";

    enableSpansDisplays = mkOption {
      type = types.bool;
      default = true;
      description = ''
        Configure macOS Spaces to span displays (required for aerospace multi-monitor support).
        When enabled, sets com.apple.spaces.spans-displays to true.
      '';
    };
  };

  config = mkIf cfg.enable {
    # Configure spaces to span displays (required for aerospace multi-monitor support)
    system.defaults.CustomUserPreferences = mkIf cfg.enableSpansDisplays {
      "com.apple.spaces" = {
        spans-displays = true;
      };
    };
  };
}