feat(extranix): Add theme option and update

modules/nixos/extranix/default.nix

@@ -52,13 +52,6 @@ let
     str
     ;
 
-  inherit (pkgs)
-    fetchFromGitea
-    hugo
-    runCommand
-    symlinkJoin
-    ;
-
   mkDocJSON =
     module:
     {
@@ -177,22 +170,16 @@ let
       '';
 
   website =
-    runCommand "search-infra"
+    pkgs.runCommand "search-infra"
       {
-        theme = fetchFromGitea {
-          domain = "git.dgnum.eu";
-          owner = "DGNum";
-          repo = "options-search-theme";
-          rev = "bcdc3e724ad5478ed39ce62a6e3342130a1bcabd";
-          hash = "sha256-pg0NifmHdfK4OltSOQfYgTVa7juZlGF642Q4Du3uheY=";
-        };
+        inherit (cfg) theme;
 
-        nativeBuildInputs = [ hugo ];
+        nativeBuildInputs = [ pkgs.hugo ];
 
         config = builtins.toJSON cfg.settings;
         passAsFile = [ "config" ];
 
-        data = symlinkJoin {
+        data = pkgs.symlinkJoin {
           name = "options-data";
           paths = mapAttrsToList mkDocJSON cfg.modules;
         };
@@ -216,6 +203,13 @@ in
   options.services.extranix = {
     enable = mkEnableOption "extranix documentation";
 
+    theme = mkOption {
+      type = path;
+      description = ''
+        Path to a hugo theme for the search website.
+      '';
+    };
+
     modules = mkOption {
       type = attrsOf (submodule {
         options = {