dialog &> /dev/null || {
    [[ $(uname -s) == "Darwin" ]] && \
       echo -e "\nInstall dialog\nbrew install -y dialog"
    if [[ -x /usr/bin/apt-get ]]; then
       echo -e "\nInstall dialog\nsudo apt-get install -y dialog"
    fi
    if [[ -x /usr/bin/pacman ]]; then
       echo -e "\nInstall dialog\nsudo pacman -S dialog"
    fi
    errors="1"
    exit 1
}