check-wordpress-versions.sh

#! /bin/bash
#
# Author:      Ash Davies <github.com/drizzlyowl>
# Requires:    wp-cli, curl, python, sendmail
# Description: Checks through all vhost directories to determine whether WordPress is 
#              installed and whether the version is out of date and sends a summary email to
#              a recipient
#

touch $HOME/wordpress-versions.tmp
echo "From: Your-Hosting-Name <hosting@your-domain.tld>" > $HOME/wordpress-versions.tmp;
echo "To: recpient@your-domain.tld" >> $HOME/wordpress-versions.tmp
echo "Subject: WordPress Versions for sites hosted on $HOSTNAME" >> $HOME/wordpress-versions.tmp;

LATEST_VER=$(curl -s 'https://api.github.com/repos/wordpress/wordpress/tags' | python -c 'import json,sys;obj=json.load(sys.stdin);print obj[0]["name"]');

for d in /var/www/vhosts/*/httpdocs/current/ ;
    do (
        cd "$d";
		if $(wp core is-installed --quiet); then
			echo "";
			echo "--------------";
			wp option get home;
			CURRENT_VER=$(wp core version);
			if [ "$CURRENT_VER" == "$LATEST_VER" ]; then
				echo "Up to date!";
			else
				echo "Current version: $CURRENT_VER";
				echo "Latest version: $LATEST_VER";
			fi
		fi
    );
    done >> $HOME/wordpress-versions.tmp

if [ -s $HOME/wordpress-versions.tmp ]
then
	sendmail -F "hosting@your-domain.tld" -f "from@your-domain.tld" recipient@your-domain.tld < $HOME/wordpress-versions.tmp
fi

# Optional: delete resulting file after processing
# rm $HOME/wordpress-versions.tmp