#+title: X Server
#+setupfile: ../headers

* X Server
What’s left of =services.xserver= on my hosts now that GNOME runs on
Wayland: picking extra video drivers to load, and my own keyboard
layout. Here’s the skeleton of the =nixos.xserver= module.
#+begin_src nix :tangle yes
{
  flake.modules.nixos.xserver = {
    config,
    lib,
    ...
  }:
    with lib; let
      cfg = config.mySystem.desktop.xserver;
    in {
      <<options>>
      <<config>>
    };
}
#+end_src

** Declaring the Option
=videoDrivers= lets a host load extra X11 drivers, such as =amdgpu= on
the machine with an AMD GPU.
#+name: options
#+begin_src nix
options.mySystem.desktop.xserver.videoDrivers = mkOption {
  type = types.listOf types.str;
  default = [];
  example = ["amdgpu"];
  description = "Extra X11 video drivers to load";
};
#+end_src

** Enabling It
I use the same Bépo AFNOR keyboard layout everywhere, so it’s baked in
directly rather than exposed as an option.
#+name: config
#+begin_src nix
config.services.xserver = {
  enable = true;
  videoDrivers = cfg.videoDrivers;
  xkb = {
    layout = "fr";
    variant = "bepo_afnor";
  };
};
#+end_src