brew cask upgrade

brew-cask-upgrade.sh

#!/bin/bash

for c in $(brew cask list); do
    info=$(brew cask info $c)
    installed_ver=$(echo "$info" | cut -d$'\n' -f1 | tr -d ' ' | cut -d':' -f 2)
    current_ver=$(echo "$info" | cut -d$'\n' -f3 | cut -d' ' -f 1 | rev | cut -d'/' -f 1 | rev)
    if [ "$installed_ver" != "$current_ver" ]; then
        echo "$c is installed '$installed_ver', current is '$current_ver'"
        brew cask reinstall $c
    fi
done

Maybe consider adding the line "brew cask cleanup" to purge the cached downloads. Even add it after as well to free up space. This would avoid the sometimes error of brew reinstalling the wrong version in its downloads folder instead of the fresh version.

Also, should include a brew update, otherwise it won't actually be working off the latest updated version numbers.

Any downside of this solution? :

brew cask reinstall `brew cask outdated`