Homebrew Package Update Notifications on macOS Mojave

brew-update-notifier.sh

#!/bin/bash
#
# Notify of Homebrew updates via Notification Center on macOS 
# Forked from: https://gist.github.com/streeter/3254906
# https://github.com/julienXX/terminal-notifier
# https://github.com/vjeantet/alerter
# Author: Ivan Sanchez https://todmephis.cf/ 
# Twetter: https://twitter.com/todmephis
# Requires: terminal-notifier, alerter. Install with:
#  brew install terminal-notifier
#  https://github.com/vjeantet/alerter
# Tested on: macOS High Sierra Version 10.13.6
# NEW: tested on macOS Mojave Version 10.14.3
# Improvements: 
#	Added log file
#	Added actions: Ignore notification, Show available packages, Install available packages (alerter needed).
# Add to crontab. Ex: 
#	$crontab -e
#	10 23 1 * * /Users/foo/.bin/brew-update-notifier.sh

USER=`whoami`
SCRIPT_PATH='/Users/'$USER'/.bin/' #set where the script lives in your mac.
LOGFILE='brew-update-notifier.log' #logfile name
BREW_EXEC=`which brew` 
TERMINAL_NOTIFIER=`which terminal-notifier`
ALERTER=`which alerter`
NOTIF_ARGS="-sound default -timeout 10 -sender com.apple.systempreferences" #default args for Notification

$BREW_EXEC update 2>&1 > /dev/null
outdated=`$BREW_EXEC outdated | tr ' ' '\n'`
if [ -z "$outdated" ] ; then
    if [ -e $TERMINAL_NOTIFIER ]; then
        # No updates available, send to notification center and logfile
        $TERMINAL_NOTIFIER \
            -title "🍺 Homebrew" -subtitle "Everything up-to-date" \
            -message "We couldn't find new updates" \
            $NOTIF_ARGS
	       	echo  "===============================================" >> $SCRIPT_PATH$LOGFILE
			date >> $SCRIPT_PATH$LOGFILE
			echo "Everything up-to-date" >> $SCRIPT_PATH$LOGFILE    

    fi
else
    # We've got an outdated formula or two
    # Nofity via Notification Center and logfile
    if [ -e $TERMINAL_NOTIFIER ]; then
        lc=$((`echo "$outdated" | wc -l`))
        outdated=`echo "$outdated" | tail -$lc`
        message=`echo "$outdated" | head -5`
        if [ "$outdated" != "$message" ]; then
            message="Some of the outdated formulae are: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            message="The following formulae are outdated: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
	    echo  "===============================================" >> $SCRIPT_PATH$LOGFILE
		date >> $SCRIPT_PATH$LOGFILE
		echo "Updates available" >> $SCRIPT_PATH$LOGFILE
        answer=$($ALERTER \
            -title "🍺 Homebrew Update(s) Available" -message "$message" \
            -closeLabel Ignore -actions Upgrade \
            $NOTIF_ARGS)
            #Take an action
	        case $answer in
	        	#Notification ignored. Send to log.
	        	"@TIMEOUT")
	        		echo  "===============================================" >> $SCRIPT_PATH$LOGFILE
					date >> $SCRIPT_PATH$LOGFILE
					echo "Notification timeout. No actions taken" >> $SCRIPT_PATH$LOGFILE
				;;
				#Clicked the notificaction. Send to logfile outdated packages
	    		"@CONTENTCLICKED")
	    			echo  "===============================================" >> $SCRIPT_PATH$LOGFILE
					date >> $SCRIPT_PATH$LOGFILE
					echo "Outdated packages" >> $SCRIPT_PATH$LOGFILE
					$BREW_EXEC outdated >> $SCRIPT_PATH$LOGFILE ; exit 0;
				;;
				#Clicked ignore option. Send to log file
	    		"Ignore")
	        		echo  "===============================================" >> $SCRIPT_PATH$LOGFILE
					date >> $SCRIPT_PATH$LOGFILE
					echo "Notification has been ignored. No actions taken" >> $SCRIPT_PATH$LOGFILE
				;;
				#Clicked upgrade option. Upgrade outdated packages and send the output to logfile
	    		"Upgrade")
	        		echo  "==============================================="
					date 
					echo "Upgrade request"
					$BREW_EXEC upgrade >> $SCRIPT_PATH$LOGFILE
					#Send notification; upgrade complete.
        			$TERMINAL_NOTIFIER \
            		  -title "🍺 Homebrew" -subtitle "Upgrade completed" \
            		  -message "Check logfile for further information" \
            		  $NOTIF_ARGS
				;;
	    		*) 
					exit 1 
				;;
			esac
    fi
fi
#by todmephis