#!/bin/bash
set -euo pipefail

(

cat /etc/prometheus/conf.d/*.conf
echo "alerting:"
echo "  alertmanagers:"
(cat /etc/prometheus/conf.d/alerting/*.conf 2> /dev/null | sed "s/^/  /") || echo ""

echo "scrape_configs:"
cat /etc/prometheus/conf.d/scrape_configs/*.conf

) > /etc/prometheus/prometheus.yml.new

chmod 0644 /etc/prometheus/prometheus.yml.new

if ! diff -q /etc/prometheus/prometheus.yml.new /etc/prometheus/prometheus.yml > /dev/null; then
	mv /etc/prometheus/prometheus.yml.new /etc/prometheus/prometheus.yml
	/usr/bin/systemctl reload prometheus
	/usr/bin/systemctl reload prometheus-alertmanager || true
else
	rm -f /etc/prometheus/prometheus.yml.new
fi