1 files changed, 23 insertions, 0 deletions
diff --git a/mirror-delay-check.sh b/mirror-delay-check.sh
new file mode 100644
index 0000000..7d9b565
--- /dev/null
+++ b/mirror-delay-check.sh
@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Upstream (Arch Geo CDN points to a Tier-1 close to you)
+UPSTREAM="https://geo.mirror.pkgbuild.com/lastsync"
+
+# Your mirror (the VIP that Arch probes)
+MIRROR="https://stygian.failzero.net/mirror/archlinux/lastsync"
+
+# Log file
+LOGFILE="/var/log/mirrors/delay.log"
+mkdir -p "$(dirname "$LOGFILE")"
+
+# Fetch timestamps (seconds since epoch)
+u=$(curl -fsS "$UPSTREAM" || echo 0)
+m=$(curl -fsS "$MIRROR" || echo 0)
+
+if [[ "$u" =~ ^[0-9]+$ && "$m" =~ ^[0-9]+$ ]]; then
+    delay_min=$(( (u - m) / 60 ))
+    echo "$(date -Is) upstream=$u mirror=$m delay=${delay_min}m" >> "$LOGFILE"
+else
+    echo "$(date -Is) error fetching lastsync" >> "$LOGFILE"
+fi