Add graphical layer as module

machines/stel-xps/default.nix

@@ -15,6 +15,11 @@
     locale.enable = true;
     # configure zsh
     zsh.enable = true;
+    # enable X11 with lightdm and i3
+    graphical = {
+      enable = true;
+      # dpi = 180;
+    };
     
     # user setup
     users = {

machines/stel-xps/software.nix

@@ -19,5 +19,8 @@
       obsstudio.enable = true;
       python.enable = true;
     };
+
+    texlive.enable = true;
+    steam-run.enable = true;
   };
 }

modules/graphical.nix

@@ -0,0 +1,79 @@
+{ config, pkgs, lib, ... }:
+with lib; {
+  options.elss.graphical= {
+    enable = mkEnableOption "configure i3-based graphical layer";
+    greeterCursorsize = mkOption{
+      type = types.int;
+      default = 16;
+      description = ''
+        Size of the cursortheme in the lightdm greeter
+      '';
+    };
+    dpi = mkOption {
+      type = types.nullOr types.int;
+      default = null;
+      description = ''
+        DPI setting for the xserver
+      '';
+    };
+  };
+  config = 
+    let
+      cfg = config.elss.graphical;
+      #cursorsize = if config.variables.hostName == "nucturne" then 14 else 16;
+      #xserverDPI = if config.variables.hostName == "stel-xps" then 180 else null;
+    in
+      {
+        config.elss.users.x11.enable = true;
+        networking.networkmanager.enable = true;
+
+        services = {
+          xserver = {
+            enable = true;
+            dpi = cfg.dpi;
+            displayManager.lightdm = {
+              enable = true;
+              greeters.gtk.cursorTheme.size = cfg.greeterCursorsize;
+            };
+            windowManager.i3 = {
+              enable = true;
+              extraPackages = with pkgs; [
+                rofi # launcher
+                polybarFull # bar
+                i3lock # lock screen
+                xss-lock
+                autorandr
+              ];
+              extraSessionCommands = ''
+          ${pkgs.autorandr}/bin/autorandr -c
+        '';
+            };
+            layout = "us";
+            xkbOptions = "eurosign:e";
+          };
+          gnome.gnome-keyring.enable = true;
+
+          printing.enable = true;
+        };
+
+        sound.enable = true;
+        
+        hardware = {
+          pulseaudio.enable = true;
+          bluetooth.enable = true;
+        };
+        
+        services.blueman.enable = true;
+
+        environment.systemPackages = with pkgs; [
+          firefox
+          thunderbird
+          okular
+          texlive.combined.scheme-full
+          usbutils
+          keepassxc
+          gnome.libsecret
+          arandr
+        ];
+      };
+}