Brew command for total updating all your installed packages including casks

brew-total.zsh

#!/usr/bin/env zsh
# Put it to /usr/local/bin/brew-total and use as `brew total`

brew update && brew upgrade --all && brew cleanup
brew cask list | xargs brew cask install && brew cask cleanup

caskroom=/opt/homebrew-cask/Caskroom

for cask in $caskroom/*
do
    candidates=($cask/*(om[2,$]))
    [[ -z $candidates ]] || rm -rf $candidates
done