OpenHab2 .sh script to help backup/restore and install new version

ohutil.sh

#!/bin/sh

#Usage: ./ohutil.sh <version> (e.g.: ./ohutil.sh 2.2.0)
#In order to run this script you must have installed: wget, unzip, tar

COMMAND=$1
OH_VERSION=$2
DOWNLOAD_URL=https://bintray.com/openhab/mvn/download_file?file_path=org%2Fopenhab%2Fdistro%2Fopenhab%2F$OH_VERSION%2Fopenhab-$OH_VERSION.zip
HOME_PATH=/home/udooer #CHANGE ME!
OH_PATH=$HOME_PATH/openhab #CHANGE ME!
OH_BAKUP_PATH=$HOME_PATH/backup #CHANGE ME!
BACKUP_DATE=$(date +"%Y%m%d%H%M%S")
GLOBAL_EXIT_CODE=1

update_all() {
	echo "Updating all"
	wget $DOWNLOAD_URL -O /tmp/ohnew.zip

	if [ $? -eq 0 ]; then
		echo "Entering backup path: $OH_BAKUP_PATH"
			cd $OH_BAKUP_PATH

		echo "Saving backup openhab2-$BACKUP_DATE.tar.gz"
			tar -zcvf openhab2-$BACKUP_DATE.tar.gz $OH_PATH >/dev/null

		echo "Removing old version"
			rm -rf $OH_PATH/*

			cd /tmp

		echo "Unzipping new version in $OH_PATH"
			unzip ohnew.zip -d $OH_PATH >/dev/null
		
		GLOBAL_EXIT_CODE=0
	else
		echo "Error downloading openhab version"
	fi
}

backup_conf() {
	echo "Backup config directory"
	
	echo "Entering backup path: $OH_BAKUP_PATH"
	
	cd $OH_BAKUP_PATH
	
	echo "Creating new backup..."	

	tar -cjf openhab2-conf-$BACKUP_DATE.tar.gz -C  $OH_PATH conf >/dev/null

	echo "Archive created: openhab2-conf-$BACKUP_DATE.tar.gz"	
	
	GLOBAL_EXIT_CODE=$?
}

backup_userdata() {
	echo "Backup userdata directory"
        
        echo "Entering backup path: $OH_BAKUP_PATH"
        
        cd $OH_BAKUP_PATH
        
        echo "Creating new backup..."   

        tar -cjf openhab2-userdata-$BACKUP_DATE.tar.gz -C  $OH_PATH userdata >/dev/null

        echo "Archive created: openhab2-userdata-$BACKUP_DATE.tar.gz"       
        
        GLOBAL_EXIT_CODE=$?

}

case "$COMMAND" in
update-all)
  	update_all
  ;;
backup-conf)
	backup_conf
  ;;
backup-userdata)
	backup_userdata
  ;;
*)
  echo "Usage: $0 {update-all|backup-conf|backup-userdata}" >&2
  ;;
esac

exit $GLOBAL_EXIT_CODE