My pre-receive hook to update my website when I "git push origin master:live"

pre-receive.sh

#!/bin/sh
while read old new branch
do
    case "$new-$branch" in
        000000000000000000*)
            : echo "ignore deleted"
            ;;
        *-refs/heads/live )
            echo "UPDATING LIVE SITE";
            git archive $new | (
                mkdir /tmp/XX.$$
                cd /tmp/XX.$$ || exit 1
                umask 022
                tar xf -
                rsync --delete -rlpgocv lib/ /web/geekcruises-secure/lib-ng/
                cd /tmp || exit 1
                rm -rf XX.$$
                )
            ;;
    esac
done