cask_clean_multiple_versions.sh

#!/usr/bin/env bash

red=`tput setaf 1`
green=`tput setaf 2`
reset=`tput sgr0`

casks=( $(brew cask list) )

for cask in ${casks[@]}
do
	installed=( $(ls /opt/homebrew-cask/Caskroom/$cask))

	if [ ${#installed[@]} -gt 1 ]; then
		echo "${red}${cask}${reset} has installed multiple ${red}versions${reset}."
		(set -x; brew cask uninstall $cask --force;)
		(set -x; brew cask install $cask --force;)
	else
		echo "${red}${cask}${reset} is ${green}ok${reset}."
	fi
done