niri: move config to nix

Signed-off-by: faukah <fau@faukah.com>
Change-Id: I6a6a6964cffaba7ce75488a48739398758d49363

modules/wms/niri/niri.mod.nix

@@ -102,6 +102,48 @@ let
 
     }
   ) { };
+
+  kdl = pkgs.callPackage ./kdl.nix { };
+
+  node = name: args: children: {
+    inherit name;
+    inherit
+      (lib.foldl
+        (
+          self: arg:
+          if lib.isAttrs arg then
+            self // { properties = self.properties // arg; }
+          else
+            self // { arguments = self.arguments ++ [ arg ]; }
+        )
+        {
+          arguments = [ ];
+          properties = { };
+        }
+        (lib.toList args)
+      )
+      arguments
+      properties
+      ;
+    inherit children;
+  };
+
+  plain = name: node name [ ];
+  leaf = name: args: node name args [ ];
+  flag = name: node name [ ] [ ];
+
+  niri-config = kdl.generate "niri-config.kdl" (
+    import ./config.nix {
+      inherit
+        node
+        plain
+        leaf
+        flag
+        lib
+        pkgs
+        ;
+    }
+  );
 in
 {
   options.modules.desktops.niri.enable = mkEnableOption "Niri, a scolling tiling wayland compositor";
@@ -115,7 +157,7 @@ in
     #  which is something I direly want to avoid.
     services.gnome.gnome-keyring.enable = mkForce false;
 
-    hjem.users.${username}.files.".config/niri/config.kdl".source = ./config.kdl;
+    hjem.users.${username}.files.".config/niri/config.kdl".source = niri-config;
 
     environment.systemPackages = builtins.attrValues {
       inherit (pkgs)