feat: sddm

modules/nixos/sddm.nix

@@ -0,0 +1,50 @@
+{ lib
+, pkgs
+, config
+, ...
+}:
+let
+  cfg = config.services.displayManager.sddm.catppuccin;
+  enable = cfg.enable && config.services.displayManager.sddm.enable;
+
+  inherit (lib) mkIf ctp types mkOption;
+in
+{
+  options.displayManager.sddm.catppuccin =
+    ctp.mkCatppuccinOpt "sddm"
+    // {
+      font = mkOption {
+        type = types.str;
+        default = "Noto Sans";
+        description = "Font to use for the login screen";
+      };
+
+      fontSize = mkOption {
+        type = types.int;
+        default = 9;
+        description = "Font size to use for the login screen";
+      };
+
+      background = mkOption {
+        type = types.nullOr types.path;
+        default = null;
+        description = "Background image to use for the login screen";
+      };
+
+      loginBackground = mkOption {
+        type = types.bool;
+        default = true;
+        description = "Add an additonal background layer to the login panel";
+      };
+    };
+
+  config = mkIf enable {
+    displayManager.sddm.theme = "catppuccin-${cfg.flavour}";
+
+    environment.systemPackages = [
+      (pkgs.catppuccin-sddm.override {
+        inherit (cfg) flavor font fontSize background loginBackground;
+      })
+    ];
+  };
+}

test.nix

@@ -1,4 +1,7 @@
-{ testers, home-manager }:
+{ testers
+, home-manager
+,
+}:
 let
   common = {
     catppuccin.enable = true;
@@ -88,14 +91,17 @@ testers.runNixOSTest {
         yazi = enable;
         zathura = enable;
         zellij = enable;
-        zsh = enable // {
-          syntaxHighlighting = enable;
-        };
+        zsh =
+          enable
+          // {
+            syntaxHighlighting = enable;
+          };
       };
 
       gtk = lib.recursiveUpdate enable { catppuccin.cursor.enable = true; };
 
       services = {
+        displayManager.sddm = enable;
         dunst = enable;
         mako = enable;
         polybar =