Customize keyboard with homerow mods and swapping alt/super

home/desktop/hypr/default.nix

@@ -18,6 +18,7 @@
       gestures.workspace_swipe = true;
 
       input = {
+        kb_options = "altwin:swap_alt_win";
         natural_scroll = true;
         scroll_factor = 0.4;
         touchpad = {

hosts/thinkpad/configuration.nix

@@ -1,5 +1,4 @@
 {
-  config,
   pkgs,
   emacs-larstvei,
   zen-browser,
@@ -12,6 +11,7 @@ in
   imports = [
     ../../system
     ../../system/nixos
+    ./keyboard.nix
     ./hardware-configuration.nix
   ];
 

hosts/thinkpad/keyboard.nix

@@ -0,0 +1,37 @@
+{
+  services.kanata = {
+    enable = true;
+    keyboards = {
+      internalKeyboard = {
+        devices = [
+          "/dev/input/by-path/platform-i8042-serio-0-event-kbd"
+        ];
+        extraDefCfg = "process-unmapped-keys yes";
+        config = ''
+          (defsrc
+           caps a s d f j k l ;
+          )
+          (defvar
+           tap-time 150
+           hold-time 200
+          )
+          (defalias
+           caps (tap-hold 100 100 esc lctl)
+           a (tap-hold $tap-time $hold-time a lsft)
+           s (tap-hold $tap-time $hold-time s lalt)
+           d (tap-hold $tap-time $hold-time d lmet)
+           f (tap-hold $tap-time $hold-time f lctl)
+           j (tap-hold $tap-time $hold-time j rctl)
+           k (tap-hold $tap-time $hold-time k rmet)
+           l (tap-hold $tap-time $hold-time l ralt)
+           ; (tap-hold $tap-time $hold-time ; rsft)
+          )
+
+          (deflayer base
+           @caps @a  @s  @d  @f  @j  @k  @l  @;
+          )
+        '';
+      };
+    };
+  };
+}