Minecraft Bedrock Upgrade Script

mcserver_upgrade.sh

#!/usr/bin/env bash

###############################################################################
# Minecraft Bedrock Server Update Script
#
# Intended to be used on Linux with a dedicated Bedrock Minecraft Server
#
# NOT COMPATIBLE WITH JAVA EDITION
#
# This script is intended to be used only in the following installation scenario
# if yours is different, then please modify the variables to fit your
# installation
# - The Minecraft install is using a dedicated user
# - The Minecraft install user has the username mcserver
# - The Minecraft install is located at /home/mcserver/minecraft_bedrock
# - The Minecraft server is managed via Systemd unit file
# - The Minecraft server's unit file is mcbedrock.service
###############################################################################

# Check for dependencies
if ! command -v date 2>&1 >/dev/null; then
    echo "'date' command was not found.  Exiting!"
    exit 1
fi

if ! command -v curl 2>&1 >/dev/null; then
    echo "'curl' command was not found.  Exiting!"
    exit 1
fi

if ! command -v wget 2>&1 >/dev/null; then
    echo "'wget' command was not found.  Exiting!"
    exit 1
fi

CURRENT_DATE=$(date +%Y-%m-%d)
DOWNLOAD_URL=$(curl -H "Accept-Encoding: identity" -H "Accept-Language: en" -s -L -A "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; BEDROCK-UPDATER)" https://minecraft.net/en-us/download/server/bedrock/ |  grep -o 'https.*/bin-linux/.*.zip')

BEDROCK_USERNAME="mcserver"
BEDROCK_USER_HOME="/home/${BEDROCK_USERNAME}"
BEDROCK_EXTRACT_DIR="${BEDROCK_USER_HOME}/extract"
BEDROCK_INSTALL_DIR="${BEDROCK_USER_HOME}/minecraft_bedrock"
BEDROCK_BACKUP_DIR="${BEDROCK_USER_HOME}/backup/${CURRENT_DATE}"

if [ "$EUID" -ne 0 ]; then
  echo "Please execute this script as root"
  exit 1
fi

if ! id -u "${BEDROCK_USERNAME}" >/dev/null 2>&1; then
    echo "Required user '${BEDROCK_USERNAME}' not found.  Exiting!"
    exit 1
fi

# if [ -d "${BEDROCK_USER_HOME}/" ]; then
#     echo "Expected home directory for Bedrock User '${BEDROCK_USERNAME}' at ${BEDROCK_USER_HOME} does not exist.  Please check configuration!  Exiting!"
#     exit 1
# fi

if [ -f "${BEDROCK_USER_HOME}/bedrock-server.zip" ]; then
    rm -rf "${BEDROCK_USER_HOME}/bedrock-server.zip"
fi

# Download the latest server installation files
wget -U "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; BEDROCK-UPDATER)" "${DOWNLOAD_URL}" -O "${BEDROCK_USER_HOME}/bedrock-server.zip"

if [ ! -f "${BEDROCK_USER_HOME}/bedrock-server.zip" ]; then
    echo "Failed to download bedrock server.  Please check your connection or if the download url has changed on 'minecraft.net'.  Exiting!"
    exit 1
fi

if [ ! -d "${BEDROCK_EXTRACT_DIR}/" ]; then
    mkdir -p "${BEDROCK_EXTRACT_DIR}"
else
    rm -rf "${BEDROCK_EXTRACT_DIR}"
    mkdir -p "${BEDROCK_EXTRACT_DIR}"
fi

# Extract the upgrade
unzip "${BEDROCK_USER_HOME}/bedrock-server.zip" -d "${BEDROCK_EXTRACT_DIR}/"

# Check the extracted contents
if [ ! -f "${BEDROCK_EXTRACT_DIR}/server.properties" ];then
    echo "Failed to locate required file in downloaded zip file extraction directory.  Exiting!"
    exit 1
fi

# Backup the existing install
# Make our backup directory
mkdir -p "${BEDROCK_BACKUP_DIR}/${CURRENT_DATE}"

systemctl stop mcbedrock.service

echo "Backing up the Bedrock Server Files"

# Backup the Bedrock server files
rsync -avz "${BEDROCK_INSTALL_DIR}/" "${BEDROCK_BACKUP_DIR}/"

echo "Syncing the new files to the existing Bedrock Folder"

# Copy the updated server files into the installation directory
rsync -avrz "${BEDROCK_EXTRACT_DIR}/bedrock_server" "${BEDROCK_INSTALL_DIR}/"
rsync -avrz "${BEDROCK_EXTRACT_DIR}/behavior_packs" "${BEDROCK_INSTALL_DIR}/"
rsync -avrz "${BEDROCK_EXTRACT_DIR}/config" "${BEDROCK_INSTALL_DIR}/"
rsync -avrz "${BEDROCK_EXTRACT_DIR}/definitions" "${BEDROCK_INSTALL_DIR}/"
rsync -avrz "${BEDROCK_EXTRACT_DIR}/permissions.json" "${BEDROCK_INSTALL_DIR}/"
rsync -avrz "${BEDROCK_EXTRACT_DIR}/release-notes.txt" "${BEDROCK_INSTALL_DIR}/"
rsync -avrz "${BEDROCK_EXTRACT_DIR}/resource_packs" "${BEDROCK_INSTALL_DIR}/"

# Fix permissions on the copied files
chown mcserver:mcserver "${BEDROCK_INSTALL_DIR}"

systemctl start mcbedrock.service

exit 0