waybar: add mouse baterry indicator

scripts/mouse-battery

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+set -e
+
+MODEL_NAME_FILE=$(rg --files-with-matches G502 /sys/class/power_supply/*/model_name | head -n1)
+
+if test -z "$MODEL_NAME_FILE"; then
+    echo
+    exit 0
+fi
+
+MOUSE=$(dirname "$MODEL_NAME_FILE")
+
+if test -z "$MOUSE"; then
+    echo
+    exit 0
+fi
+
+CAPACITY=$(cat "$MOUSE/capacity")
+STATUS=$(cat "$MOUSE/status")
+
+echo -n '🖱️'
+
+if test "$STATUS" = "Charging"; then
+    echo -n "󰂄"
+else
+    print-battery-icon "$CAPACITY"
+fi
+
+if test "$CAPACITY" -lt 50; then
+    echo -n "$CAPACITY%"
+fi
+
+echo
+
+# Tooltip
+echo -n '🖱️'
+print-battery-icon "$CAPACITY"
+echo " $CAPACITY%"