list-ports.sh

#!/bin/sh

# Usage: bash list-ports.sh PRIVATE_PORT
# PRIVATE_PORT default 80

privatePort=${1-80}
services=`docker-compose ps --service --filter "status=running" 2> /dev/null`

if [ -z "$services" ]
then
    echo "❗️no running services found" >&2
    exit 1
fi

echo Private port $privatePort

for service in $services
do
    port=`docker-compose port $service $privatePort 2> /dev/null`

    if [ $? -eq 0 ] && [ -n "$port" ]
    then
        echo $service: $port
    fi
done