profiles/wg-clerie: Convert systemd timer into a service with sleep

profiles/wg-clerie/wg-clerie-endpoint-refresh.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+prev_endpoint=""
+
+while true; do
+	if ! wg show wg-clerie endpoints &>/dev/null; then
+		if [[ "${prev_endpoint}" != "" ]]; then
+			echo "Interface wg-clerie unavailable, doing nothing"
+			prev_endpoint=""
+		fi
+
+		sleep 5
+		continue
+	fi
+
+	if ip route get 2a01:4f8:c0c:15f1::1 ipproto udp dport 51820 &>/dev/null; then
+		new_endpoint="[2a01:4f8:c0c:15f1::1]:51820"
+	else
+		new_endpoint="78.47.183.82:51820"
+	fi
+
+	if [[ "${new_endpoint}" != "${prev_endpoint}" ]]; then
+		echo "Switching endpoint for wg-clerie to ${new_endpoint}"
+		wg set wg-clerie peer "2p1Jqs3bkXbXHFWE6vp1yxHIFoUaZQEARS2nJzbkuBA=" endpoint "${new_endpoint}"
+		prev_endpoint="${new_endpoint}"
+	fi
+
+	sleep 5
+done