start.sh

#!/bin/bash
#Minecraft Bedrock Docker server startup script using screen
#Author: James A. Chambers - https://jamesachambers.com/legendary-minecraft-bedrock-container/
#GitHub Repository: https://github.com/TheRemote/Legendary-Bedrock-Container

echo "Minecraft Bedrock Server Docker script by James A. Chambers"
echo "Latest version always at https://github.com/TheRemote/Legendary-Bedrock-Container"
echo "Don't forget to set up port forwarding on your router!  The default port is 19132"

if [ ! -d '/minecraft' ]; then
    echo "ERROR:  A named volume was not specified for the minecraft server data.  Please create one with: docker volume create yourvolumename"
    echo "Please pass the new volume to docker like this:  docker run -it -v yourvolumename:/minecraft"
    exit 1
fi

Terminal=$(readlink /proc/self/fd/0)
if [ -z "$Terminal" ] || [ "$Terminal" != "/dev/pts/0" ]; then
    echo "An interactive terminal is required (you don't have to attach).  Please run with docker -it or docker -itd (detached interactive terminal)."
    sleep 10
    exit 1
fi

# Randomizer for user agent
RandNum=$(echo $((1 + $RANDOM % 5000)))

if [ -z "$PortIPV4" ]; then
    PortIPV4="19132"
fi
if [ -z "$PortIPV6" ]; then
    PortIPV6="19133"
fi
echo "Ports used - IPV4: $PortIPV4 - IPV6: $PortIPV6"

# Check if server is already started
ScreenWipe=$(screen -wipe 2>&1)
if screen -list | grep -q "\.minecraftbe"; then
    echo "Server is already started!  Press screen -r minecraftbe to open it"
    exit 1
fi

# Change directory to server directory
cd /minecraft

# If clean switch is specified then remove downloads and version_installed.txt
if [ -n "$Clean" ]; then
    echo "Cleaning enabled, removing downloads and version_installed.txt..."
    rm -rf /minecraft/downloads
    rm -f /minecraft/version_installed.txt
fi

# Create logs/backups/downloads folder if it doesn't exist
if [ ! -d "/minecraft/logs" ]; then
    mkdir -p /minecraft/logs
fi
if [ ! -d "/minecraft/downloads" ]; then
    mkdir -p /minecraft/downloads
fi
if [ ! -d "/minecraft/backups" ]; then
    mkdir -p /minecraft/backups
fi

# Check if network interfaces are up
NetworkChecks=0
if [ -e '/sbin/route' ]; then
    DefaultRoute=$(/sbin/route -n | awk '$4 == "UG" {print $2}')
else
    DefaultRoute=$(route -n | awk '$4 == "UG" {print $2}')
fi
while [ -z "$DefaultRoute" ]; do
    echo "Network interface not up, will try again in 1 second"
    sleep 1
    if [ -e '/sbin/route' ]; then
        DefaultRoute=$(/sbin/route -n | awk '$4 == "UG" {print $2}')
    else
        DefaultRoute=$(route -n | awk '$4 == "UG" {print $2}')
    fi
    NetworkChecks=$((NetworkChecks + 1))
    if [ $NetworkChecks -gt 20 ]; then
        echo "Waiting for network interface to come up timed out - starting server without network connection ..."
        break
    fi
done

# Take ownership of server files and set correct permissions
if [ -z "$NoPermCheck" ]; then
    echo "Taking ownership of all server files/folders in /minecraft..."
    sudo -n chown -R $(whoami) /minecraft >/dev/null 2>&1
    echo "Complete"
else
    echo "Skipping permissions check due to NoPermCheck flag"
fi

# Create backup
if [ -d "worlds" ]; then
    echo "Backing up server (to minecraftbe/backups folder)"
    if [ -n "$(which pigz)" ]; then
        echo "Backing up server (multiple cores) to minecraftbe/backups folder"
        tar -I pigz -pvcf backups/$(date +%Y.%m.%d.%H.%M.%S).tar.gz worlds
    else
        echo "Backing up server (single cored) to minecraftbe/backups folder"
        tar -pzvcf backups/$(date +%Y.%m.%d.%H.%M.%S).tar.gz worlds
    fi
fi

# Rotate backups -- keep most recent 10
if [ -e /minecraft/backups ]; then
    Rotate=$(
        pushd /minecraft/backups
        ls -1tr | head -n -$BackupCount | xargs -d '\n' rm -f --
        popd
    )
fi

# Retrieve latest version of Minecraft Bedrock dedicated server
echo "Checking for the latest version of Minecraft Bedrock server ..."

# Test internet connectivity first
if [ -z "$QuietCurl" ]; then
    curl -H "Accept-Encoding: identity" -H "Accept-Language: en" -L -A "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.$RandNum.212 Safari/537.36" -s https://www.minecraft.net/ -o /dev/null
else
    curl --no-progress-meter -H "Accept-Encoding: identity" -H "Accept-Language: en" -L -A "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.$RandNum.212 Safari/537.36" -s https://www.minecraft.net/ -o /dev/null
fi
if [ "$?" != 0 ]; then
    echo "Unable to connect to update website (internet connection may be down).  Skipping update ..."
else
    # Download server index.html to check latest version
    if [ -z "$QuietCurl" ]; then
        curl -H "Accept-Encoding: identity" -H "Accept-Language: en" -L -A "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.$RandNum.212 Safari/537.36" -o /minecraft/downloads/version.html https://www.minecraft.net/en-us/download/server/bedrock
    else
        curl --no-progress-meter -H "Accept-Encoding: identity" -H "Accept-Language: en" -L -A "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.$RandNum.212 Safari/537.36" -o /minecraft/downloads/version.html https://www.minecraft.net/en-us/download/server/bedrock
    fi
    LatestURL=$(grep -o 'https://www.minecraft.net/bedrockdedicatedserver/bin-linux/[^"]*' downloads/version.html)

    LatestFile=$(echo "$LatestURL" | sed 's#.*/##')

    echo "Latest version online is $LatestFile"
    if [ -n "$Version" ]; then
        PinFile="bedrock-server-$Version.zip"
        echo "Override version, using version specified: $Version as $PinFile"
    fi

    if [ -e version_installed.txt ]; then
        InstalledFile=$(cat version_installed.txt)
        echo "Current install is: $InstalledFile"
    fi

    if [[ "$PinFile" == *"zip" ]] && [[ "$InstalledFile" == "$PinFile" ]]; then
        echo "Requested version $PinFile is already installed"
    elif [ ! -z "$PinFile" ]; then
        echo "Installing $PinFile"
        DownloadFile=$PinFile
        DownloadURL="https://www.minecraft.net/bedrockdedicatedserver/bin-linux/$PinFile"

        # Download version of Minecraft Bedrock dedicated server if it's not already local
        if [ ! -f "downloads/$DownloadFile" ]; then
            if [ -z "$QuietCurl" ]; then
                curl -H "Accept-Encoding: identity" -H "Accept-Language: en" -L -A "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.$RandNum.212 Safari/537.36" -o "downloads/$DownloadFile" "$DownloadURL"
            else
                curl --no-progress-meter -H "Accept-Encoding: identity" -H "Accept-Language: en" -L -A "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.$RandNum.212 Safari/537.36" -o "downloads/$DownloadFile" "$DownloadURL"
            fi
        fi

        # Install version of Minecraft requested
        if [ ! -z "$DownloadFile" ]; then
            unzip -o "downloads/$DownloadFile" -x "*server.properties*" "*permissions.json*" "*whitelist.json*" "*valid_known_packs.json*" "*allowlist.json*"
            Permissions=$(chmod u+x /minecraft/bedrock_server >/dev/null)
            echo "$DownloadFile" >/minecraft/version_installed.txt
        fi
    elif [[ "$InstalledFile" == "$LatestFile" ]]; then
        echo "Latest version $LatestFile is already installed"
    else
        echo "Installing $LatestFile"
        DownloadFile=$LatestFile
        DownloadURL=$LatestURL

        # Download version of Minecraft Bedrock dedicated server if it's not already local
        if [ ! -f "downloads/$DownloadFile" ]; then
            if [ -z "$QuietCurl" ]; then
                curl -H "Accept-Encoding: identity" -H "Accept-Language: en" -L -A "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.$RandNum.212 Safari/537.36" -o "downloads/$DownloadFile" "$DownloadURL"
            else
                curl --no-progress-meter -H "Accept-Encoding: identity" -H "Accept-Language: en" -L -A "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.$RandNum.212 Safari/537.36" -o "downloads/$DownloadFile" "$DownloadURL"
            fi
        fi

        # Install version of Minecraft requested
        if [ ! -z "$DownloadFile" ]; then
            unzip -o "downloads/$DownloadFile" -x "*server.properties*" "*permissions.json*" "*whitelist.json*" "*valid_known_packs.json*" "*allowlist.json*"
            Permissions=$(chmod u+x /minecraft/bedrock_server >/dev/null)
            echo "$DownloadFile" >/minecraft/version_installed.txt
        fi
    fi
fi

if [ ! -e /minecraft/server.properties ]; then
    cp -rf /scripts/server.properties /minecraft/server.properties
fi

if [ ! -e /minecraft/allowlist.json ]; then
    cp -rf /scripts/allowlist.json /minecraft/allowlist.json
fi

if [ ! -e /minecraft/permissions.json ]; then
    cp -rf /scripts/permissions.json /minecraft/permissions.json
fi

# Change ports in server.properties
sed -i "/server-port=/c\server-port=$PortIPV4" /minecraft/server.properties
sed -i "/server-portv6=/c\server-portv6=$PortIPV6" /minecraft/server.properties

# Start server
echo "Starting Minecraft server..."
CPUArch=$(uname -m)
if [[ "$CPUArch" == *"x86_64"* ]]; then
    BASH_CMD="./bedrock_server"
elif [[ "$CPUArch" == *"aarch64"* ]]; then
    if [ -z "$UseQEMU" ]; then
        BASH_CMD="box64 bedrock_server"
    else
        BASH_CMD="qemu-x86_64-static bedrock_server"
    fi
else
    BASH_CMD="qemu-x86_64-static bedrock_server"
fi
if command -v gawk &>/dev/null; then
    BASH_CMD+=$' | gawk \'{ print strftime(\"[%Y-%m-%d %H:%M:%S]\"), $0 }\''
else
    echo "gawk application was not found -- timestamps will not be available in the logs"
fi

exec /bin/bash -c "${BASH_CMD}"