#!/bin/sh

url=https://s3.amazonaws.com/Minecraft.Download/versions

cd ~/servers/snapshot

wget -N --no-check-certificate $url/versions.json > /dev/null 2>&1

latest=$(grep id versions.json | head -n 1 | cut -d'"' -f4)

current=$(ls versions/*.jar -t | head -n 1 | sed -e 's/versions\/minecraft_server\.//;s/\.jar//')

if [ "$latest" != "$current" ]; then

echo "New minecraft version ($latest) detected! Upgrading..."

touch world.lock

wget --no-check-certificate -nc -P versions $url/$latest/minecraft_server.$latest.jar > /dev/null 2>&1

sed -e s/minecraft_server\.$current/minecraft_server\.$latest/g start.sh > start.sh~

kill -USR1 `cat snapshot.tentacle`

# wait until the server is actually shut down

while [ 0 -lt `find world | xargs lsof | wc -l` ]; do sleep 1; done

# do world backup

tar -jcf backups/world-$current.tar.bz2 world

rm world.lock

fi