~veebers/juju-ci-tools/migration-add-migrate-back-to-original

#!/bin/bash
set -eu
service=${2-SSH}
port=${2-22}
echo -n Waiting for $service >&2
while ! netcat $1 $port -w 1 -q 0 </dev/null >/dev/null; do
  sleep 1
  echo -n . >&2
done
echo >&2