Mullvad VPN + Polybar = 😍

mullvad.sh

PID_FILE=~/.cache/mullvad-status-pid

SUCCESS_HOOK=1
SHUTDOWN_HOOK=1

finish() {
    echo "Shutting down..."
    rm $PID_FILE
    rm $CACHE_FILE

    polybar-msg hook mullvad ${SHUTDOWN_HOOK}
    exit 0
}

startup_check() {
    if [ -f "$PID_FILE" ] && kill -0 "$(cat $PID_FILE)" 2>/dev/null; then
        echo "Either another process is running, or the process did not close cleanly last time."
        echo "Try deleting ${PID_FILE} if this is an error."
        exit 1
    fi  
    echo $$ > $PID_FILE
}

main() {
    mullvad status listen | while IFS= read -r line; do
        echo "${line}"
        if [[ $line =~ Disconnected ]]; then
            echo "Disconnected" > $CACHE_FILE
        fi

        if [[ $line =~ Connecting ]]; then
            echo "Connecting" > $CACHE_FILE
        fi

        if [[ $line =~ Connected ]]; then
            ip=$(echo "${line}" | awk '{ print $6 }' | sed 's/:.*//')
            echo "${ip}" > $CACHE_FILE
        fi

        polybar-msg hook mullvad ${SUCCESS_HOOK}
    done

}

startup_check
trap finish SIGINT SIGQUIT SIGTSTP
main

polybar-config

[module/mullvad]
format-prefix = " "
format-prefix-foreground = ${colors.foreground-alt}
format = <output>
type = custom/ipc
hook-0 = cat ~/.cache/mullvad-status
click-left = mullvad connect
double-click-left = mullvad reconnect
click-right = mullvad disconnect
initial = 1

The result!