update_blynkserver.sh

#!/bin/bash

# get current dir
prog_dir="/opt/blynkserver"
if [ -d "$prog_dir" ]
then
	prog_dir_version=$(ls "$prog_dir" | grep jar | sed s/"server-"/""/ | sed s/"\.jar"/""/)
fi
echo "DIR: $prog_dir"
echo "DIR Version: $prog_dir_version"

# get current url
prog_url_version=$(curl -s https://github.com/blynkkk/blynk-server/releases/latest | sed s/".*<a"/""/ | cut -d\" -f2 | sed s/".*tag\/v"/""/)
prog_url="https://github.com/blynkkk/blynk-server/releases/download/v${prog_url_version}/server-${prog_url_version}.jar"
echo "URL: $prog_url"
echo "URL Version: $prog_url_version"


# check that a current version is found
if [ "$prog_dir_version" == "" ]
then
	echo "New Installation! (no old version found)"
	new_install="1"
fi

# check that a new version and url are found
if [ "$prog_url" == "" ] || [ "$prog_url_version" == "" ]
then
	echo "couldn't find url for new version"
	exit
fi

# check current dir version with current url version
if [ "$prog_dir_version" != "$prog_url_version" ]
then
	if [ "$new_install" != "1" ]
	then
		echo "New Version Found!"
	fi

	gist_pwd=$(pwd)

	mkdir -p "${prog_dir}/data"
	cd "$prog_dir"
	# download
	wget --quiet --show-progress "$prog_url"
	# remove old version
	if [ -f server-${prog_dir_version}.jar ]
	then
		rm server-${prog_dir_version}.jar
	fi

	# create start-script
	echo "#!/bin/bash" > blynkserver
	echo "java -jar ${prog_dir}/server-${prog_url_version}.jar -dataFolder ${prog_dir}/data" >> blynkserver
	chmod +x blynkserver
fi