Homebrew Package Update Notifications via Growl

brew-update-notifier.sh

#!/bin/bash
#
# Notify of Homebrew updates via Growl on Mac OS X
#
# Author: Chris Streeter http://www.chrisstreeter.com
# Requires: Growl Notify Extra to be installed. Install with
#   brew install growlnotify


TERM_APP='/Applications/Terminal.app'
BREW_EXEC='/usr/local/bin/brew'
GROWL_NOTIFY='/usr/local/bin/growlnotify'
GROWL_TITLE="Homebrew Update(s) Available"
GROWL_ARGS="-n 'Homebrew' -d $GROWL_NOTIFY -a $BREW_EXEC"

$BREW_EXEC update 2>&1 > /dev/null
outdated=`$BREW_EXEC outdated | tr ' ' '\n'`

if [ -z "$outdated" ] ; then
    if [ -e $GROWL_NOTIFY ]; then
        # No updates available
        $GROWL_NOTIFY $GROWL_ARGS -m '' -t "No Homebrew Updates Available"
    fi
else
    # We've got an outdated formula or two
    
    # Nofity via growl
    if [ -e $GROWL_NOTIFY ]; then
        lc=$((`echo "$outdated" | wc -l`))
        outdated=`echo "$outdated" | tail -$lc`
        message=`echo "$outdated" | head -5`
        if [ "$outdated" != "$message" ]; then
            message="Some of the outdated formulae are:
$message"
        else
            message="The following formulae are outdated:
$message"
        fi
        # Send to growlnotify
        echo "$message" | $GROWL_NOTIFY $GROWL_ARGS -s -t $GROWL_TITLE
    fi
fi