standardnotes-server/packages/files/wait-for.sh

#!/bin/sh

set -e

host="$1"
shift
port="$1"
shift
cmd="$@"

while ! nc -vz $host $port; do
  >&2 echo "waiting for $host:$port..."
  sleep 1
done

>&2 echo "$host:$port is up - executing command"
exec $cmd