hyprpanel: assert theme name warning

modules/programs/hyprpanel/default.nix

@@ -89,30 +89,31 @@ in
 
     xdg.configFile.hyprpanel = lib.mkIf (cfg.settings != { }) {
       target = "hyprpanel/config.json";
-      source = jsonFormat.generate "hyprpanel-config" (
-        if cfg.settings ? theme && cfg.settings.theme ? name then
-          lib.warn ''
-            `settings.theme.name` option has been removed, because the
-            hyprpanel module has been ported to downstream home-manager and
-            implementing it would require IFD
-            (https://nix.dev/manual/nix/2.26/language/import-from-derivation)
-
-            Replace it with:
-            ```nix
-            programs.hyprpanel = {
-              theme = {
-                # paste content of https://github.com/Jas-SinghFSU/HyprPanel/blob/2c0c66a/themes/${cfg.settings.theme.name}.json
-              };
-            };
-            ```
-          '' cfg.settings
-        else
-          cfg.settings
-      );
+      source = jsonFormat.generate "hyprpanel-config" cfg.settings;
       # hyprpanel replaces it with the same file, but without new line in the end
       force = true;
     };
 
+    warnings = lib.optional (cfg.settings ? theme && cfg.settings.theme ? name) (
+      lib.hm.deprecations.mkDeprecatedOptionValueWarning {
+        option = [
+          "programs"
+          "hyprpanel"
+          "settings"
+          "theme"
+          "name"
+        ];
+        old = "a named theme";
+        replacement = "`programs.hyprpanel.settings.theme`";
+        details = ''
+          Named theme loading was removed because it requires import-from-derivation.
+
+          Paste theme contents from:
+            https://github.com/Jas-SinghFSU/HyprPanel/blob/2c0c66a/themes/${cfg.settings.theme.name}.json
+        '';
+      }
+    );
+
     systemd.user.services.hyprpanel = lib.mkIf cfg.systemd.enable {
       Unit = {
         Description = "Bar/Panel for Hyprland with extensive customizability";

tests/modules/programs/hyprpanel/default.nix

@@ -2,5 +2,6 @@
 
 lib.optionalAttrs pkgs.stdenv.hostPlatform.isLinux {
   hyprpanel-basic-config = ./basic-config.nix;
+  hyprpanel-deprecated-theme-name = ./deprecated-theme-name.nix;
   hyprpanel-with-hypridle = ./with-hypridle.nix;
 }

tests/modules/programs/hyprpanel/deprecated-theme-name.nix

@@ -0,0 +1,26 @@
+{ config, ... }:
+
+{
+  programs.hyprpanel = {
+    enable = true;
+    package = config.lib.test.mkStubPackage { name = "hyprpanel"; };
+    settings.theme.name = "catppuccin_mocha";
+  };
+
+  test.asserts.warnings.expected = [
+    ''
+      Using `programs.hyprpanel.settings.theme.name` as a named theme is deprecated and will be
+      removed in a future release. Please use `programs.hyprpanel.settings.theme` instead.
+
+      Named theme loading was removed because it requires import-from-derivation.
+
+      Paste theme contents from:
+        https://github.com/Jas-SinghFSU/HyprPanel/blob/2c0c66a/themes/catppuccin_mocha.json
+
+    ''
+  ];
+
+  nmt.script = ''
+    assertFileExists "home-files/.config/hyprpanel/config.json"
+  '';
+}