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config/polybar/scripts/checkupdates.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+updates=$(sysupdate)
+
+if [ -z "$updates" ]; then
+  count=0
+else
+  printf '%s\n' "$updates" >/tmp/bspwm-polybar-updates
+  count=$(wc -l "/tmp/bspwm-polybar-updates" | awk '{print $1}')
+fi
+
+echo "%{T1}%{T-} %{T2}$count %{T-}"