A script for installing/updating Stendhal on a Linux/Unix system.

stendhal.sh

#!/bin/bash

# A script for installing/updating Stendhal on a Linux/Unix system.
#
# LICENSE: CC0

# script to run/update Stendhal

JAVA=$(which java)

if [ -z "${JAVA}" ]; then
	echo -e "\nERROR: Java is required to run Stendhal. Could not find a Java executable."
	exit 1
fi

URL_VER="https://raw.githubusercontent.com/arianne/stendhal/master/build.ant.properties"
URL_DL="https://arianne-project.org/download/stendhal.zip"
DIR_BASE="/opt/games/stendhal"
DIR_DL="/tmp"

JAR="${DIR_BASE}/stendhal-starter.jar"
DIR_MENU="/usr/local/share/applications"
MENU="${DIR_MENU}/stendhal.desktop"


if [ "$1" == "update" ] || [ "$1" == "install" ]; then
	if [ "${EUID}" -ne "0" ]; then
		echo -e "\nERROR: You need root permissions to update this software"
	else
		echo -e "\nChecking version ..."
		VER="$(wget -qO - "${URL_VER}" | grep "version\.old" | sed -e 's|version\.old = ||')"
		if [ -z "${VER}" ]; then
			echo -e "\nERROR: Could not determine latest version"
			exit 1
		else
			FILE_BASE="stendhal-${VER}.zip"
			FILE_FULL="${DIR_DL}/${FILE_BASE}"

			echo "Current version: ${VER}"
			echo "Downloading to ${FILE_FULL}"
			if [ ! -d "${DIR_DL}" ]; then
				if [ -e "${DIR_DL}" ]; then
					echo -e "\nERROR: ${DIR_DL} exists but is not a directory"
					exit 1
				fi

				mkdir -p "${DIR_DL}"
			fi

			if [ ! -f "${FILE_FULL}" ]; then
				wget --show-progress -qO "${FILE_FULL}" "${URL_DL}"

				if [ ! -f "${FILE_FULL}" ]; then
					echo -e "\nERROR: Could not download current Stendhal package"
					exit 1
				fi
			else
				echo "Extracting from previously downloaded package ..."
			fi

			# clean target directory
			if [ -d "${DIR_BASE}" ]; then
				find "${DIR_BASE}" -mindepth 1 -type f -delete
				find "${DIR_BASE}" -mindepth 1 -type d -empty -delete
			else
				mkdir -p "${DIR_BASE}"
			fi

			# extract package contents
			unzip -q "${FILE_FULL}" -d "${DIR_BASE}"
			chmod +x "${JAR}"

			# menu entry
			if [ ! -d "${DIR_MENU}" ]; then
				mkdir -p "${DIR_MENU}"
			fi
			echo -e "[Desktop Entry]\n\
Version=1.0\n\
Encoding=UTF-8\n\
Name=Stendhal\n\
Comment=Multiplayer Online RPG\n\
Exec=java -jar \"${JAR}\"\n\
Icon=${DIR_BASE}/icon.ico\n\
Type=Application\n\
Terminal=false\n\
Category=Game;\n" > "${MENU}"
			echo -e "\nUpdate finished"

			# update desktop menu cache
			xdg-desktop-menu forceupdate
			# LXDE
			LXPANEL=$(which lxpanelctl)
			if [ ! -z "${LXPANEL}" ]; then
				echo "Updating LXDE system menu ..."
				rm -f “${HOME}/.config/menus/lxde-applications.menu” “${HOME}/.config/menus/debian-menu.menu”
				# FIXME: need to update current user lxpanel
				#lxpanelctl restart
				echo -e "\nYou may need to run 'lxpanelctl restart. If that does not work, try restarting your system."
			fi
		fi
	fi
elif [ "$1" == "uninstall" ]; then
	if [ "${EUID}" -ne "0" ]; then
		echo -e "\nERROR: You need root permissions to uninstall this software"
		exit 1
	fi

	if [ ! -d "${DIR_BASE}" ]; then
		echo -e "\nStendhal is not installed"
		exit 0
	fi

	find "${DIR_BASE}" -type f -delete
	find "${DIR_BASE}" -type d -empty -delete
	# remove menu file
	rm -f "${MENU}"
	xdg-desktop-menu forceupdate

	echo -e "\nUninstall complete"
else
	if [ ! -f "${JAR}" ]; then
		echo -e "\nERROR: Stendhal does not appear to be installed. Run 'stendhal install'."
		exit 1
	fi

	java -jar "${JAR}"
fi