#!/bin/bash

# You will likely want to install this in /etc/periodic/daily (or weekly) so that it runs automatically

# You will probably want to pair this with an email sending program of some sort.
# Enabling postfix on OSX is kind of a pain, so you may want a self-contained mailer
# like the "mailtest" utility here: http://mikehardy.net/mailtest
# This script is currently written to expect that to be installed in /usr/local/bin
HOME=/var/tmp/launchd
ERROR_ADDRESS=example@example.com

# You can find this out by saying "dig mx <your email domain name here>"
MAILHOST=alt1.aspmx.l.google.com

PORT=/opt/local/bin/port

# This script suffers from the "thundering herd" problem - the server is too
# stressed to respond because lots of nightly scripts like this one are hitting it
# Lets be nice and definitely sleep 10 minutes, then sleep 0-15 more minutes after that
sleep 600
sleep $(( $$ % 900 ))

# Update ourselves and all the port files, output goes to /var/log/weekly.out
# if the script is in /etc/periodic/weekly/
$PORT selfupdate

# Make sure that worked
if [ $? != 0 ]; then
   /usr/local/bin/mailtest -s "Unable to check for outdated ports" -m "empty" -f root -H $MAILHOST -t $ERROR_ADDRESS
   exit 1
fi

# Get the list of ports
output=`/opt/local/bin/port list outdated`
output_count=`echo $output | wc -l`

if [ $output_count -ne 1 ]; then
   /usr/local/bin/mailtest -s "There are outdated ports" -m "$output" -f root -H $MAILHOST -t $ERROR_ADDRESS
fi