Script to update minecraft server to latest version, either snapshot or release

download.sh

#!/bin/sh
# Can be snapshot or release
DEFAULTREVISION=release

# Pull out latest snapshot version
REVISION=${1-$DEFAULTREVISION}
REGEX="(?<=$REVISION\": \").*?[^\\\\](?=\")"
VERSION=`curl -silent "http://s3.amazonaws.com/Minecraft.Download/versions/versions.json" | grep -Po "$REGEX"`
if [ "$VERSION" = "" ]; then
        echo "Invalid Version"; exit
fi
URL="https://s3.amazonaws.com/Minecraft.Download/versions/$VERSION/minecraft_server.$VERSION.jar"
echo "Version: " $VERSION
echo "URL: " $URL

# Download the latest version
curl -O $URL

# Symlink to the server jar
if [ -f "minecraft_server.jar" ]; then
        rm minecraft_server.jar
fi
ln -s "minecraft_server.$VERSION.jar" minecraft_server.jar

how do I use this

copy the code down into a text doc named
update.py

then run python3 update.py