#!/bin/sh

set -eu

cd /var/www/logs

find_rotated() {
    find . -mindepth 1 -maxdepth 1 -type f -name "${1}.*" | sort -V -r
}

for log in *.log ; do
    find_rotated "$log" | while read -r name; do
        ext="${name##*.}"
        next="${name%.*}.$((ext+1))"
	mv "$name" "$next"
    done
    mv "$log" "${log}.1"
    touch "$log"

    find_rotated "$log" | while read -r name; do
        num="$(echo "$name" | awk -F. '{ print $NF }')"
	if [ "$num" -gt 7 ]; then
            rm -f "$log"
	fi
    done
done

kill -USR1 "$(cat /var/run/nginx.pid)"