A script for controlling a minecraft server

minecraft

#!/bin/bash
# Author: Max Trewhitt <max@trewhitt.se>
# Template: https://natelandau.com/boilerplate-shell-script-template/
# Description: A script for controlling a minecraft server

# Config
FILENAME=Paper-latest.jar
SERVER_PATH=/home/mc-server
SERVER_DOWNLOAD_URL=https://yivesmirror.com/files/paper/$FILENAME

# Print usage
usage() {
        echo -n "
  Minecraft server script.

  Usage:
    minecraft [ARGUMENT]

  [ARGUMENT]:
    help                Prints this help dialog
    status              Displays the current status
    start               Starts the server
    stop                Stops the server
    console             Go to the server console
    update              Updates the minecraft server

"
}

start() {
        if ! screen -list | grep -q "mc-server"; then
                screen -dm -S mc-server bash -c "(cd $SERVER_PATH && java -Xms1500M -Xmx1500M -jar $FILENAME)"
                echo "Server started."
        else
                echo "Server already running."
        fi
}

stop() {
        screen -S mc-server -p 0 -X stuff "^Mstop^M"
        echo "Server stopped."
}

console() {
        screen -r mc-server
}

status() {
        if ! screen -list | grep -q "mc-server"; then
                echo "Server not running."
        else
                echo "Server running."
        fi
}

update() {
        wget -P $SERVER_PATH -N $SERVER_DOWNLOAD_URL
}

# Check if script is run as root
if [[ $(/usr/bin/id -u) -ne 0 ]]; then
    echo "This script must be run as root, try again with sudo."
    exit
fi

# Print help if no arguments were passed.
# Uncomment to force arguments when invoking the script
[[ $# -eq 0 ]] && set -- "help"

# Read the options and set stuff
case $1 in
        help) usage;;
        start) start;;
        stop) stop;;
        console) console;;
        status) status;;
        update) update;;
        *) echo "invalid option: '$1'.";;
esac

exit