Install for Auto Update to Paper Servers

#!/bin/bash

start(){
echo "Starting Installation..."
read -p "Press enter to continue"
currentvercheck(){
    if [ -f currentversion.txt ]; then
        echo "currentversion exists..."
        cd ../
        echo "creating start..."
        cat << 'EOF' > start.sh
#!/bin/bash

    #Check for Updates
    ../updatescript/updatething.sh

    #Start Server
    java -Xms128M -Xmx{{SERVER_MEMORY}}M -jar {{SERVER_JARFILE}}

EOF
        chmod +x start.sh
        echo "Installation Finished"
    else
        echo "creating currentversion..."
        cat << 'EOF' > currentversion.txt
0
EOF
        currentvercheck
    fi
}

uthingcheck(){
    if [ -f updatething.sh ]; then
        echo "updatething exists..."
        currentvercheck
    else
        echo "creating updatething..."
        cat << 'EOF' > updatething.sh
#!/bin/bash

cd updatescript/
current=`cat currentversion.txt`

echo "Checking for Server Update..."
new=`curl -s "https://papermc.io/api/v1/paper/1.14.4" | jq -r '.builds | .latest' 2>&1 | tee latestversion.txt`
echo "Paper is on version $new"

startserver(){
    exit
}

        comparedemapples(){
            if [ "${new}" -gt "${current}" ]; then
                echo "paper-$new.jar is a new update."
                echo "Updating to paper-$new.jar"
                wget -nv -nc --content-disposition https://papermc.io/api/v1/paper/1.14.4/$new/download
                file="paper-$new.jar"
                if [ -f "$file" ]; then
                    echo "paper-$new.jar has been downloaded. Renaming some shit..."
                    cp paper-$new.jar ../server.jar
                    echo "$new" > currentversion.txt
                    startserver
                else
                    echo "Error 404: paper-$new.jar could not be found."
                    read -p "Press enter to continue"
                fi
            else
                echo "paper-$new.jar is already installed and running."
                echo "You good on your updates my dude."
                startserver
            fi
        }

comparedemapples
EOF
        chmod +x updatething.sh
        uthingcheck
    fi
}

dircheck(){
    if [ -d updatescript ]; then
        echo "updatescript exists..."
        cd updatescript
        uthingcheck
    else
        echo "creating updatescript..."
        mkdir updatescript
        dircheck
    fi
}

dircheck

}

start