Add kitty theming

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

users/configs/kitty/default.nix

@@ -1,4 +1,4 @@
-{ user ? throw "user argument is required" }: { config, ... }:
+{ user ? throw "user argument is required" }: { config, pkgs, ... }:
 
 let
   hmConfig = config.home-manager.users."${user.name}";
@@ -9,9 +9,26 @@ in
       enable = true;
       extraConfig = ''
         confirm_os_window_close 0
+        include theme.conf
       '';
     };
 
+    programs.matugen.settings.templates = {
+      kitty = {
+        input_path = ./theme.conf;
+        output_path = "${hmConfig.xdg.configHome}/kitty/theme.conf";
+      };
+    };
+
+    theme.extraConfig = let name = "reload-kitty"; in
+      "${pkgs.writeShellApplication {
+        inherit name;
+        runtimeInputs = with pkgs; [ procps ];
+        text = ''
+          pkill kitty -SIGUSR1
+        '';
+      }}/bin/${name} &";
+
     home.persistence."/cache${user.home}".directories = [ "${hmConfig.xdg.relativeCacheHome}/kitty" ];
   };
 }