import os

import sys

import subprocess

LINUX = "linux"

MAC = "mac"

WIN = "win"

def os_name():

pl = sys.platform

if pl == "linux" or pl == "linux2":

return LINUX

elif pl == "darwin":

return MAC

elif pl == "win32":

return WIN

def is_mac():

return MAC == os_name()

def is_linux():

return LINUX == os_name()

def is_windows():

return WIN == os_name()

def inside_container():

"""

Returns true if we are running inside a container.

https://github.com/docker/docker/blob/a9fa38b1edf30b23cae3eade0be48b3d4b1de14b/daemon/initlayer/setup_unix.go#L25

"""

return os.path.exists('/.dockerenv')

def default_gateway_ip():

"""

Returns gateway IP address of the host that testcontainer process is

running on

https://github.com/testcontainers/testcontainers-java/blob/3ad8d80e2484864e554744a4800a81f6b7982168/core/src/main/java/org/testcontainers/dockerclient/DockerClientConfigUtils.java#L27

"""

cmd = ["sh", "-c", "ip route|awk '/default/ { print $3 }'"]

try:

process = subprocess.Popen(cmd, stdout=subprocess.PIPE,

stderr=subprocess.PIPE)

ip_address = process.communicate()[0]

if ip_address and process.returncode == 0:

return ip_address.decode('utf-8').strip().strip('\n')

except subprocess.SubprocessError:

return None