"""
Docker support

@author: olivier.massot, 05-2020
"""
import subprocess
from subprocess import Popen, PIPE


def resolve_docker_ip(docker_name):
    cmd = ["docker",
           "inspect",
           "-f",
           "'{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}'",
           docker_name]
    try:
        output = subprocess.check_output(cmd)
    except (subprocess.CalledProcessError, FileNotFoundError) as e:
        raise RuntimeError("An error occured while retrieving IP for docker %s: %s", docker_name, e)
    return output.decode('utf-8').strip('\n').replace("'", "")