A helper to notify you when you have brews ready to update

millertime

#!/bin/bash
# This script runs the homebrew updater, then reports if any of your packages are out of date
# Generally, this should be run automatically using a launchctl task (see end of file for an example)
#
# In addition, you might want to change the notification style to be an "alert" so it hangs around a while.
# This can be done in System Preferences -> Notification Center (look for homebrew-notifier)
#
# Requires:
#   - Homebrew
#   - terminal-notifier (brew install terminal-notifier)

# Update this to your liking, based on System Preferences -> Sound -> Sound Effects (case sensitive)
declare -r NOTIFICATION_SOUND="Sosumi"

update_homebrew ()
{
    # Check for updated recipes, don't do anything with the output
    /usr/local/bin/brew update > /dev/null 2>&1
}

get_installed_package_updates ()
{
    # Fetch the packages that are installed and out of date
    local updates=`/usr/local/bin/brew outdated`
    echo $updates
}

has_updates ()
{
    # Check if the passed variable has anything in it
    local var=$1

    [[ -n $var ]]
}

post_notification ()
{
    # Post a notification where the first argument is the message (outdated packages)
    local updates=$1
    local subtitle=$(echo "Homebrew updates available! 🍺")
    /usr/local/bin/terminal-notifier \
        -sound $NOTIFICATION_SOUND \
        -message "$updates" \
        -group homebrew_notifier \
        -activate com.apple.Terminal \
        -subtitle "$subtitle"
}

main ()
{
    update_homebrew
    local updates=$(get_installed_package_updates)
    has_updates $updates && post_notification "$updates"
}
main

# # Example launchctl xml file
# 1. Replace the "ProgramArguments" array path string to match where you store this script
# 2. Edit the interval as needed (currently it runs every day at 9:00am), many guides and generators exist for this.
# 3. This XML file should be stored in ~/Library/LaunchAgents/ with a name that matches the label (optional)
#    So the result file might be: ~/Library/LaunchAgents/local.homebrew-updater.plist
# 4. Then you need to load this into launchctl using:
#    $ launchctl load -w ~/Library/LaunchAgents/local.homebrew-updater.plist
#
# <?xml version="1.0" encoding="UTF-8"?>
# <!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
# <plist version="1.0">
# <dict>
#     <key>Label</key>
#     <string>local.homebrew-update-notifier</string>
#     <key>PATH</key>
#     <string>/bin:/usr/bin:/usr/local/bin</string>
#     <key>ProgramArguments</key>
#     <array>
#         <string>sh</string>
#         <string>-c</string>
#         <string>~/Desktop/brewupdatenotify.sh</string>
#     </array>
#     <key>StartCalendarInterval</key>
#     <array>
#         <dict>
#             <key>Hour</key>
#             <integer>9</integer>
#             <key>Minute</key>
#             <integer>00</integer>
#         </dict>
#     </array>
# </dict>
# </plist>