install-now.sh

#!/usr/bin/env sh
if [ ! -f /usr/local/bin/now ] && [ ! -f /bin/now ];
then
    case "$(uname -s)" in
        Darwin) cp now /usr/local/bin;;
        Linux) cp now /bin;;
    esac
    echo "Now installed successfully"
else
    echo "Now is already installed"
    printf '\e[0;31m%s\e[0m \n\r' 'Do you want to (R)einstall or (U)ninstall now? (A)bort [R/U/A]?'
    read -n 1 x
    if [ "$x" == "u" ] || [ "$x" == "U" ];
    then
        case "$(uname -s)" in
            Darwin) rm /usr/local/bin/now;;
            Linux) rm /bin/now;;
        esac
		printf '\e[0;32m \r%s\e[0m\n' 'Uninstalled successfully'
	elif [ "$x" == "r" ] || [ "$x" == "R" ] ;
	then
	    case "$(uname -s)" in
            Darwin) cp now /usr/local/bin;;
            Linux) cp now /bin;;
        esac
        printf '\e[0;32m \r%s\e[0m\n' 'Now reinstalled successfully'
    elif [ "$x" == "a" ] || [ "$x" == "A" ];
    then
        printf '\rno changes\n'
    else
        printf '\r🤷️\n'
    fi
fi