#!/bin/sh
# Push skyweave metrics to Prometheus pushgateway every 30 seconds.
# PUT (not POST) so the whole group is replaced each cycle — per-client
# series for departed stations don't linger. Skips the push if the local
# metrics fetch fails, so a CGI hiccup never blanks the group.
PUSHGW="http://192.168.88.44:9091/metrics/job/rvlink/instance/rvlink"
METRICS_URL="http://127.0.0.1:42069/cgi-bin/skyweave.lua/metrics"

while true; do
    BODY=$(curl -sf "$METRICS_URL")
    if [ -n "$BODY" ]; then
        printf '%s\n' "$BODY" | curl -sf -X PUT --data-binary @- "$PUSHGW" >/dev/null 2>&1
    fi
    sleep 30
done