sway: sync Xwayland keyboard layout

scripts/default.nix

@@ -138,6 +138,10 @@
       libinput
       libratbag
     ];
+    sway-sync-xkbmap = [
+      xorg.setxkbmap
+      jq
+    ];
     print-battery-icon = [ ];
     controller-battery = [ print-battery-icon ];
     mouse-battery = [ print-battery-icon ];

scripts/sway-sync-xkbmap

@@ -0,0 +1,22 @@
+#!/bin/sh
+
+set -euo pipefail
+
+LAST_LAYOUT=""
+
+while sleep 1s; do
+    CURRENT_LAYOUT=$(swaymsg -t get_inputs | jq -r '.[]|.xkb_active_layout_name|select(.)' | head -n1)
+
+    if test "$LAST_LAYOUT" = "$CURRENT_LAYOUT"; then
+        true
+    elif test "$CURRENT_LAYOUT" = "English (Colemak)"; then
+        echo "Setting layout to colemak"
+        setxkbmap us colemak
+    elif test "$CURRENT_LAYOUT" = "Portuguese (Brazil)"; then
+        echo "Setting layout to br"
+        setxkbmap br
+    fi
+
+    LAST_LAYOUT="$CURRENT_LAYOUT"
+done
+