Minecraft management script : Handle ATLauncher modpack check version and update

lastVersion.sh

#!/bin/bash

PACK_NAME="DNSTechpack"
SERVER_FILE=$2

usage() {
        echo "Usage: $0 {get|update} (new version file)"
        return 1
}

getVersion() {
        wget http://www.atlauncher.com/pack/$PACK_NAME/ -q -O /tmp/${PACK_NAME}_version
        sed -nr 's/<a .* href="(.*)">Download Server<\/a>/\1/p' /tmp/${PACK_NAME}_version
        unlink /tmp/${PACK_NAME}_version
        return 0
}

updateVersion() {
        echo " * Removing the old executable"
        rm -Rf "forge-*.jar" minecraft_server.jar libraries liteconfig mods options.txt pack.json scripts
        echo " * Linking to the new version"
        unzip -qq -d /tmp/$PACK_NAME "$SERVER_FILE"
        mv -n /tmp/$PACK_NAME/* .
        rm -Rf /tmp/$PACK_NAME
        ln -s $(ls forge-*.jar) minecraft_server.jar
        return 0
}

case "$1" in
  get)
 getVersion
 ;;
  update)
 updateVersion
 ;;
  *)
 usage
 ;;
esac

exit $?