Hack brew to always keep a copy of your latests casks and brews on Dropbox

.bashrc.sh

# Append the following to your .bashrc or file that contains your user profile:
function brew(){
        case $1 in
        install)
                echo "Install"
                /usr/local/bin/brew $*
                /usr/local/bin/brew list > ~/Dropbox/new_comp/mac/brews_autolisted.txt
                ;;
        cask)
                echo "Cask"
                if [[ $2 == 'install' ]]
                then
                        echo "Cask Install"
                        /usr/local/bin/brew $*
                        /usr/local/bin/brew cask list > ~/Dropbox/new_comp/mac/brews_autolisted.txt
                else
                        echo "Got: $*"
                        /usr/local/bin/brew $*
                fi
                ;;
        *)
                echo "Got: $*"
                /usr/local/bin/brew $*
                ;;
        esac
}