verdown_to_previous.sh

#!/bin/bash

set -eu

readonly MINECRAFT_DIR="/opt/minecraft_server"
readonly MINECRAFT_SERVICE="/etc/systemd/system/minecraft-server.service"
readonly backup_dir=$(ls ${MINECRAFT_DIR}/backup | sort -r | head -n 1)

if [ -z ${backup_dir} -o -e ${backup_dir} ]; then
    echo "Error: Backup directory not found."
    exit 1
fi

systemctl disable --now minecraft-server

rm -rf ${MINECRAFT_DIR}/[^backup]*

cp -r ${MINECRAFT_DIR}/backup/${backup_dir}/* ${MINECRAFT_DIR}
mv -f ${MINECRAFT_DIR}/minecraft-server.service ${MINECRAFT_SERVICE}

chown minecraft:minecraft -R ${MINECRAFT_DIR}

systemctl daemon-reload
systemctl enable --now minecraft-server

echo "Version down finished"