Add kanata

hosts/stellaris/default.nix

@@ -15,6 +15,7 @@
       libvirt.enable = true;
       languagetool.enable = true;
       work-proxy.enable = true;
+      kanata.enable = true;
     };
     media = {
       mpd.enable = true;

modules/services/kanata.nix

@@ -0,0 +1,57 @@
+{
+  config,
+  lib,
+  ...
+}:
+
+let
+  cfg = config.modules.services.kanata;
+in
+{
+  options.modules.services.kanata = {
+    enable = lib.my.mkBoolOpt false;
+  };
+
+  config = lib.mkIf cfg.enable {
+    services.kanata = {
+      enable = true;
+      keyboards.laptop.config = ''
+        ;; QWERTY-shaped matrix; works for AZERTY because Kanata uses scancodes.
+        (defsrc
+          esc 1 2 3 4 5 6 7 8 9 0 - = bspc
+          tab q w e r t y u i o p [ ] \
+          caps a s d f g h j k l ; ' ret
+          lsft z x c v b n m , . / rsft
+          lctl lmet lalt spc ralt rmet rctl
+        )
+
+        (defvar
+          tap-time 150
+          hold-time 200
+        )
+
+        ;; Home-row mod-taps (tap sends the letter; hold sends the modifier)
+        (defalias
+          a-alt (tap-hold $tap-time $hold-time a lalt)
+          s-ctl (tap-hold $tap-time $hold-time s lctl)
+          d-sft (tap-hold $tap-time $hold-time d lsft)
+          f-met (tap-hold $tap-time $hold-time f lmet)
+
+          j-met (tap-hold $tap-time $hold-time j rmet)
+          k-sft (tap-hold $tap-time $hold-time k rsft)
+          l-ctl (tap-hold $tap-time $hold-time l rctl)
+          ;-alt (tap-hold $tap-time $hold-time ; ralt)
+        )
+
+        (deflayer main
+          esc 1 2 3 4 5 6 7 8 9 0 - = bspc
+          tab q w e r t y u i o p [ ] \
+          caps @a-alt @s-ctl @d-sft @f-met g h @j-met @k-sft @l-ctl @;-alt ' ret
+          lsft z x c v b n m , . / rsft
+          lctl lmet lalt spc ralt rmet rctl
+        )
+      '';
+    };
+
+  };
+}