Simple upgrate script for vanilla forums (2.1)

vanilla-upgrade.sh

#!/bin/bash
if [ "$#" -ne 2 ]; then
  echo "Usage: sudo $(basename $0) /path/to/updated_vanilla_git/ /path/to/current_vanilla_installation/"
  exit 1
fi
new_vanilla=$1
install_dir=${2:=/var/www/vanilla/}
tmp=/tmp
branch=2.1
http_group=www-data
url=http://yourpage.net/index.php?p=/utility/update

function today() {
  date +"%Y-%m-%d"
}

function timestamp() {
  date +"%H:%M:%S"
}


##########
# DO stuff

echo "Backing up old vanilla installation to: $tmp - started: $(timestamp)"
cd $install_dir
cp conf/config.php $tmp/
cp conf/locale.php $tmp/
cd ..
tar cfz $tmp/vanilla-$(today).tgz $(basename $install_dir)

#copy new files
echo "Copying new installation from $new_vanilla - $(timestamp)"
cd $new_vanilla
git archive $branch | tar x -C $install_dir

echo "Restoring config - $(timestamp)"
cd $install_dir
cp $tmp/config.php conf/
cp $tmp/locale.php conf/

#fix permissions
echo "Fixing permissions"
cd $install_dir
sudo chmod -R g+w cache/
sudo chgrp -R $http_group cache/
sudo chmod -R g+w conf/
sudo chgrp -R $http_group conf/
sudo chmod -R g+w uploads/
sudo chgrp -R $http_group uploads/

echo "Finished upgrading - $(timestamp)"
echo "If everything works, you should delete the vanilla-date.tgz and config.php file from $tmp"
echo "Go check $url"