In addition to, the following sets up installation of Mac AppStore applications as well as brew files.
Install Homebrew:
$ /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
Install mas:
$ brew install mas
Install Brew Bundle:
$ brew bundle
You can automatically write a bundle with the command:
$ brew bundle dump
add the -describe switch to get a description/comment before each item in the Brewfile.
$ brew bundle dump -describe
Save your Brewfile to iCloud or locally. When you set up a new Mac you can use it to automatically install everything.
Once you've created a Brewfile, updating brew is as simple as issuing the command brew bundle.
Thanks to brew and mas, updating your Mac system entirely is as simple as:
$ softwareupdate -ia -verbose ; brew bundle -v ; brew cleanup ; brew doctor -verbose
softwareupdate is a built-in MacOS command to update the system from the command line. To see which updates are needed type:
$ softwareupdate -l
The -i switch can be used to specify individual components to be updated, -ia says update them all.
Combining softwareupdate with brew bundle -v will upgrade everything on your system that's been installed using mas or brew.