greetd: extract greetd config

flake.nix

@@ -95,6 +95,9 @@
         ./system/configuration.nix
         ./system/secrets.nix
         ./system/specialisation.nix
+        ./system/greetd.nix
+        { login-manager.greetd.enable = desktop == "sway" || desktop == "hyprland"; }
+
         inputs.agenix.nixosModules.default
         inputs.hyprland.nixosModules.default
         inputs.dzgui-nix.nixosModules.default
@@ -109,7 +112,7 @@
           # arguments to home.nix
           home-manager.extraSpecialArgs = { inherit inputs; };
         }
-      ] ++ lib.optional (desktop == "sway") ./system/sway.nix
+      ]
       ++ lib.optional (desktop == "gnome") ./system/gnome.nix
       ++ lib.optional (desktop == "kde") ./system/kde.nix;
     in

system/greetd.nix

@@ -0,0 +1,86 @@
+{ lib, pkgs, config, ... }:
+let
+  inherit (pkgs.uservars) key accent font theme desktop;
+
+  cfg = config.login-manager.greetd;
+in
+{
+  options.login-manager.greetd = {
+    enable = lib.mkEnableOption "Use greetd as login manager";
+  };
+
+  config = lib.mkIf cfg.enable {
+
+    # Enable the X11 windowing system.
+    services.xserver.enable = false;
+
+    # enable sway window manager
+    programs.sway = {
+      enable = true;
+      wrapperFeatures.gtk = true;
+    };
+
+    services.dbus.enable = true;
+    programs.wshowkeys.enable = true;
+    xdg.portal = {
+      enable = true;
+      wlr.enable = true;
+      # Always pick the first monitor, this is fine since I only ever use a single monitor
+      wlr.settings.screencast.chooser_type = "none";
+      # gtk portal needed to make gtk apps happy
+      extraPortals = [ pkgs.xdg-desktop-portal-gtk ];
+    };
+    services.greetd =
+      let
+        greetd_main_script = pkgs.writeShellScriptBin "main" ''
+          ${pkgs.dbus-sway-environment}/bin/dbus-sway-environment
+          export XDG_CURRENT_DESKTOP=sway GTK_THEME="${theme.gtk_theme}" XCURSOR_THEME="${theme.cursor_theme}"
+          ${pkgs.greetd.gtkgreet}/bin/gtkgreet -l -c ${desktop}
+          swaymsg exit
+        '';
+        swayConfig = pkgs.writeText "greetd-sway-config" ''
+          # `-l` activates layer-shell mode. Notice that `swaymsg exit` will run after gtkgreet.
+          exec "${greetd_main_script}/bin/main"
+          bindsym Mod4+shift+e exec swaynag \
+            -t warning \
+            -m 'What do you want to do?' \
+            -b 'Poweroff' 'systemctl poweroff' \
+            -b 'Reboot' 'systemctl reboot'
+          input "*" {
+            repeat_delay 200
+            repeat_rate 30
+            xkb_layout us(colemak)
+            xkb_numlock enabled
+            xkb_options lv3:lsgt_switch,grp:shifts_toggle
+          }
+        '';
+      in
+      {
+        enable = true;
+        settings = {
+          initial_session = {
+            command = "${pkgs.sway}/bin/sway";
+            user = "lelgenio";
+          };
+          default_session = {
+            command = "${pkgs.sway}/bin/sway --config ${swayConfig}";
+          };
+        };
+      };
+    environment.systemPackages = with pkgs; [
+      sway
+      swaylock
+      swayidle
+
+      wayland
+      pkgs.xdg-desktop-portal
+      pkgs.xdg-desktop-portal-wlr
+
+      ## Theme
+      capitaine-cursors
+      bibata-cursors
+      orchis_theme_compact
+      papirus_red
+    ];
+  };
+}

system/sway.nix

@@ -1,77 +0,0 @@
-{ pkgs, ... }:
-let
-  inherit (pkgs.uservars) key accent font theme;
-in
-{
-
-  # Enable the X11 windowing system.
-  services.xserver.enable = false;
-
-  # enable sway window manager
-  programs.sway = {
-    enable = true;
-    wrapperFeatures.gtk = true;
-  };
-  services.dbus.enable = true;
-  programs.wshowkeys.enable = true;
-  xdg.portal = {
-    enable = true;
-    wlr.enable = true;
-    # Always pick the first monitor, this is fine since I only ever use a single monitor
-    wlr.settings.screencast.chooser_type = "none";
-    # gtk portal needed to make gtk apps happy
-    extraPortals = [ pkgs.xdg-desktop-portal-gtk ];
-  };
-  services.greetd =
-    let
-      greetd_main_script = pkgs.writeShellScriptBin "main" ''
-        ${pkgs.dbus-sway-environment}/bin/dbus-sway-environment
-        export XDG_CURRENT_DESKTOP=sway GTK_THEME="${theme.gtk_theme}" XCURSOR_THEME="${theme.cursor_theme}"
-        ${pkgs.greetd.gtkgreet}/bin/gtkgreet -l -c sway
-        swaymsg exit
-      '';
-      swayConfig = pkgs.writeText "greetd-sway-config" ''
-        # `-l` activates layer-shell mode. Notice that `swaymsg exit` will run after gtkgreet.
-        exec "${greetd_main_script}/bin/main"
-        bindsym Mod4+shift+e exec swaynag \
-          -t warning \
-          -m 'What do you want to do?' \
-          -b 'Poweroff' 'systemctl poweroff' \
-          -b 'Reboot' 'systemctl reboot'
-        input "*" {
-          repeat_delay 200
-          repeat_rate 30
-          xkb_layout us(colemak)
-          xkb_numlock enabled
-          xkb_options lv3:lsgt_switch,grp:shifts_toggle
-        }
-      '';
-    in
-    {
-      enable = true;
-      settings = {
-        initial_session = {
-          command = "${pkgs.sway}/bin/sway";
-          user = "lelgenio";
-        };
-        default_session = {
-          command = "${pkgs.sway}/bin/sway --config ${swayConfig}";
-        };
-      };
-    };
-  environment.systemPackages = with pkgs; [
-    sway
-    swaylock
-    swayidle
-
-    wayland
-    pkgs.xdg-desktop-portal
-    pkgs.xdg-desktop-portal-wlr
-
-    ## Theme
-    capitaine-cursors
-    bibata-cursors
-    orchis_theme_compact
-    papirus_red
-  ];
-}