def __call__(
self, value=None, behaviour='append', sep=pathsep, reset=False,
_valid=frozenset(['append', 'prepend', 'replace'])
):
if value is None:
return stringify_env_var(self.var)
if behaviour not in _valid:
raise ValueError("Unknown behaviour: %s" % behaviour)
key = '$%s' % self.var
val = []
if (not reset) and (behaviour != 'replace'):
if key in env:
val.extend(env[key])
val.append((value, behaviour, sep))
kwargs = {key: tuple(val)}
return _setenv(**kwargs)
def __str__(self):
return stringify_env_var(self.var)
