Keep Wordpress Up to Date

wp-utd.sh

#!/bin/bash
#
# WP-UTD
# WordPress Up To Date 0.1, May 25 2012
# by Marcos BL; No license, feel free use it
#
# WP-UTD checks all your local WordPress installations are 
# up-to-date and notifies you by email if a new version
# is available.
#
# REQUIREMENTS
#   Local mail server, e.g. postfix, sendmail, ...
#   Crontab if you want to do automatic checks
#
# USAGE
#   $ ./wp-utd <NOTIFY-EMAIL>
#
# AS CRONJOB
#   0 6 * * * /path/to/wp-utd admin@example.com 
#

### Parse Parameters ####################################

#PATH="/bin:/sbin:/usr/bin:/usr/sbin"

function latest_wp() {
        ## Determine latest version
        echo -n "Checking WP latest version... "

        # Alternative to 'wget': curl -I "$URL" 2> /dev/null
        LATEST_INFO=$(wget -q -O - http://api.wordpress.org/core/version-check/1.2/)
        LATEST=$(echo "$LATEST_INFO" | tail -n 2 | head -n 1)
        LATEST_URL=$(echo "$LATEST_INFO" | tail -n 3 | head -n 1)

        echo "WordPress $LATEST"
}
function have_notify_email() {
        if [ $# -le 1 ]; then
                echo "Usage: $0 <NOTIFY-EMAIL>"
                echo "  e.g. $0 mymail@example.com"
                exit 1
        fi
        NOTIFY_EMAIL="$2"
        echo "Sending notify emails to: $NOTIFY_EMAIL"
}
function we_can_email() {
        if [ ! -x "$(which sendmail)" ]; then
                echo "ERROR: No sendmail compatible mail server found."
                exit 2
        fi
        HOSTNAME="$(hostname)"
}
function wpcheck() {
        WORDPRESS=${1/\/wp-includes\/version.php/}
        VERSION_FILE="$WORDPRESS/wp-includes/version.php"
        echo -n "Checking $WORDPRESS"
        if [ ! -f "$VERSION_FILE" ]; then
                echo -n " - ERROR: No WordPress installation found at $WORDPRESS"
        fi
        INSTALLED=$(cat "$VERSION_FILE" \
                | grep '\$wp_version[ ]*=' \
                | sed -r "s/.+'(.+)';/\1/")
        echo -n " - WordPress $INSTALLED"
        if [ "$INSTALLED" != "$LATEST" ]; then
                echo -en ' \E[47;31m'"\033[1m[ Update required! ]\033[0m" 
                echo -e "To: $NOTIFY_EMAIL\nSubject: Outdated WordPress $INSTALLED at $WORDPRESS\n\n" \
                        "The WordPress installation on host $HOSTNAME needs an update:\n\n" \
                        "  Installed Version: WordPress $INSTALLED\n" \
                        "                 at: $WORDPRESS\n\n" \
                        "     Latest Version: WordPress $LATEST\n" \
                        "           Download: $LATEST_URL" \
                        | sendmail -t "$NOTIFY_EMAIL"
        else
                echo -n " Up to date."
        fi
        echo ""
}

### Requirements ###########################################

have_notify_email $0 $1
we_can_email

## Check all WP installations ################################

latest_wp

/usr/bin/updatedb
LISTING=(`locate wp-includes/version.php | grep -v '/rsyncs'`)
echo ""
echo "Found ${#LISTING[*]} WP Installations:"
echo ""
for i in ${LISTING[*]}
do
        wpcheck $i
done