meta: Dump changes

modules/default.nix

@@ -10,6 +10,7 @@
     ./programs/emacs
     ./programs/firefox
     ./programs/gnome
+    ./programs/gdm
     ./programs/gnome-terminal
     ./programs/mpv
     ./programs/git

modules/programs/emacs/dotemacs

@@ -89,6 +89,7 @@
   (smartparens-global-mode t))
 (use-package undo-tree
   :config
+  (setq undo-tree-auto-save-history nil)
   (global-undo-tree-mode))
 
 (setq-default indent-tab-mode t)

modules/programs/gdm/default.nix

@@ -0,0 +1,22 @@
+{ pkgs, config, lib, ... }:
+
+let
+  cfg = config.ptw.services.gdm;
+in {
+  options.ptw.services.gdm = {
+    enable = lib.mkEnableOption "Enable GDM as a display manager";
+    monitors = lib.mkOption {
+      description = "The file to use as a monitors.xml";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    services.xserver.displayManager.gdm = {
+      wayland = true;
+      enable = true;
+
+      # TODO: Use monitors.xml
+      # job
+    };
+  };
+}