codekingpro/portable-devtools

1from __future__ import annotations2 3from contextlib import suppress4 5from .convert import convert6 7 8def get_env_var(key, as_type, env):9    """10    Get the environment variable option.11 12    :param key: the config key requested13    :param as_type: the type we would like to convert it to14    :param env: environment variables to use15    :return:16    """17    environ_key = f"VIRTUALENV_{key.upper()}"18    if env.get(environ_key):19        value = env[environ_key]20 21        with suppress(Exception):  # note the converter already logs a warning when failures happen22            source = f"env var {environ_key}"23            as_type = convert(value, as_type, source)24            return as_type, source25    return None26 27 28__all__ = [29    "get_env_var",30]31