Brew cask helpers (OSX)

cask_helpers.sh

function cask_install() {
    if brew cask info "${@}" | grep "Not installed" > /dev/null; then
        brew cask install "${@}"
    else
        echo "${@} is already installed."
    fi
}

function cask_upgrade() {
    if brew cask info "${@}" | grep "Not installed" > /dev/null; then
        echo "${@} is not installed."
    else
        brew cask install --force "${@}"
    fi
}

function cask_cleanup() {
    local caskroom="/opt/homebrew-cask/Caskroom"

    for app in $(/usr/bin/find "$caskroom" -depth 1 -type d); do
        if [[ $(/usr/bin/find "$app" -depth 1 -type d | wc -l) -gt 1 ]]; then
            echo -n "$(basename "$app"):"

            for version in $(/bin/ls -1t "$app" | /usr/bin/tail -n+2); do
                echo -n " $version "
                rm -rf "$app/$version"
            done

            echo
        fi
    done
}