Do you know what you services you are running or what tools are installed on your macbook? How many packages do you think are installed?

Homebrew Bundle is a way to manage your Homebrew packages repeatably and predictably. This helps us to manage our Homebrew packages in an automated fashion.

Bundle

A bundle you create using the brew bundle command. This will let you create a dump of the taps, packages and casks currently present on your system.

This dump we will later use to bring the system in sync at a regular interval.

$ brew bundle dump --file ~/Brewfile

If you want to add anything later, you can do this two ways.

• Install the package and create a new dump
• Add the entry to ~/Brewfile and re-install

Re-installing from the ~/Brewfile manually can be done with this command.

$ brew bundle install --file ~/Brewfile --clean

+ Launchd

Launchd will help us to bring the system in sync on a set interval. This way, any ad-hoc installs of packages will be reverted at the end of every day.

Replace [user] with the username on your machine and save it to
~/Library/LaunchAgents/sh.brew.bundle_sync.plist

Use this command to load the service.
launchctl load -w ~/Library/LaunchAgents/sh.brew.bundle_sync.plist.

<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>
    <key>Label</key>
    <string>sh.brew.bundle_sync</string>
  
    <key>Program</key>
    <string>/usr/local/bin/brew</string>
  
    <key>ProgramArguments</key>
    <array>
      <string>/usr/local/bin/brew</string>
      <string>bundle</string>
      <string>install</string>
      <string>--file</string>
      <string>/Users/[user]/Brewfile</string>
      <string>--clean</string>
    </array>
  
    <key>StandardOutPath</key>
    <string>/Users/[user]/Brewfile.launchd.stdout</string>
  
    <key>StandardErrorPath</key>
    <string>/Users/[user]/Brewfile.launchd.stderr</string>
  
    <key>StartCalendarInterval</key>
    <dict>
      <key>Hour</key>
      <integer>10</integer>
    </dict>
  </dict>
</plist>