wait-for-port-nc.bash

#!/usr/bin/env bash

# wait for a program to start listening on a PORT ($1)
wait_for_port() {
    local PORT=$1
    echo "waiting for $PORT"
    for i in `seq 1 60`;
    do
      nc -z localhost $PORT && echo "port $PORT is ready" && return
      echo -n .
      sleep 1
    done
    echo "Failed waiting for $PORT" && exit 1
}