miracle2k/webassets — pull request #209 by aromanovich (2013-01-29 12:21:56+00:00)
Title: Make BaseEnvironment always evaluate to True in a boolean context

I found a bit confusing that environment without bundles evaluates to `False`.

For example, when environment passed to the function as keyword argument,
I must explicitly check whether it is `None` or not:
https://github.com/aromanovich/carcade/blob/master/carcade/environments.py#L56