Never think about maintaining your homebrew install again with this shitty (but useful) shell script & cron job!

ale.bash

#!/bin/bash

echo ""

echo "`date`: RUNNING: brew update"
/usr/local/bin/brew update
echo "`date`: FINISHED: brew update"

echo ""

echo "`date`: RUNNING: brew upgrade"
/usr/local/bin/brew upgrade
echo "`date`: FINISHED: brew upgrade"

echo ""

echo "`date`: RUNNING: brew cleanup"
/usr/local/bin/brew cleanup
echo "`date`: FINISHED: brew cleanup"

echo ""

echo "All done! Enjoy a cold one! 🍺 "

echo ""

crontab

MAILTO=""
0 9,21 * * * /Users/USERNAME/scripts/ale.bash >> /Users/USERNAME/logs/ale.log

Thanks!

Add 2>&1 to the end of that cron so any output on stderr also hit the log file.

eg:

0 9,21 * * * /Users/USERNAME/scripts/ale.bash >> /Users/USERNAME/logs/ale.log 2>&1

Or just ignore all the output (runs every 6 hours starting at midnight, 6am, etc)

30 */6 * * *     /usr/local/bin/brew update > /dev/null 2>&1 && /usr/local/bin/brew upgrade > /dev/null 2>&1 && /usr/local/bin/brew cleanup > /dev/null 2>&1