cronjob to automatically update a piratebay proxy to the latest version

updatePiratebayProxy.sh

#!/bin/sh
# usage:
# m h  dom mon dow   command
# * */4 * * * ~/scripts/updatePiratebayProxy > /dev/null

# Configuration
HOSTNAME=tpb.example.com
REPO_BASE=~
DESTINATION=/etc/apache2/sites-available/example.com_tpb.conf
ACCESS_LOG=/var/log/apache2/example.com_tpb-access.log
ERROR_LOG=/var/log/apache2/example.com_tpb-error.log

# update the repository and patch in the ServerName
update() {
  echo "updating..."

	# pull changes
	git pull --quiet

	# copy new file
	sudo cp domain.com_tpb.conf $DESTINATION

	# change servername configuration
	sudo sed -i "s/ServerName.*/ServerName $HOSTNAME/g" $DESTINATION

	# change log configuration
	sudo sed -i "s/ErrorLog.*/ErrorLog $(echo "$ERROR_LOG"|sed -e 's/\//\\\//g' -e 's/\./\\\./g')/g" $DESTINATION
	sudo sed -i "s/CustomLog.*/CustomLog $(echo "$ERROR_LOG"|sed -e 's/\//\\\//g' -e 's/\./\\\./g') combined/g" $DESTINATION

	# reload apache
	sudo /etc/init.d/apache2 reload
}

# got a repo?
if [ ! -d $REPO_BASE/pirateBayProxy ]; then
	echo "creating repo"

	# clone repo
	cd $REPO_BASE
	git clone https://github.com/4np/pirateBayProxy.git

	# go to the git repo
	cd $REPO_BASE/pirateBayProxy

	# perform update
	update
else
	# go to the git repo
	cd $REPO_BASE/pirateBayProxy

	# check if there are incoming changes
	git remote update

	# check if we need to update
	BEHIND=`git status -uno|grep -i "is behind"|wc -l`
	if [ $BEHIND -gt 0 ]; then
		update
	fi
fi