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from __future__ import absolute_import, unicode_literals
import os
from virtualenv.util.six import ensure_str, ensure_text
from .convert import convert
def get_env_var(key, as_type):
"""Get the environment variable option.
:param key: the config key requested
:param as_type: the type we would like to convert it to
:return:
"""
environ_key = ensure_str("VIRTUALENV_{}".format(key.upper()))
if os.environ.get(environ_key):
value = os.environ[environ_key]
# noinspection PyBroadException
try:
source = "env var {}".format(ensure_text(environ_key))
as_type = convert(value, as_type, source)
return as_type, source
except Exception: # note the converter already logs a warning when failures happen
pass
__all__ = ("get_env_var",)
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