can't use enviroment variable

[wifasoi]

I noted i can't use the enviroment variable in my template [commit: 4b6c048]. I made some testing with this template:
[export TEST=succes]
{% if environ.TEST is defined %}TEST={{ environ.TEST }}{% endif %}

I pin-poin the issue at this line:
env.globals['environ'] = os.environ.get
I'm not an expert with jinja2, but i think you need to pass a dictionary (I noticed an iterable is fine) and not a fuction.
I fixed by changing the line with:
env.globals['environ'] = dict(os.environ)
or (becouse os.environ is iterable)
env.globals['environ'] = os.environ

I think the functionality need to be documented in the README.

[mattrobenolt]

The intended usage is:

{{ environ('FOO') }}
{{ environ('FOO', 'somedefault') }}

So the behavior I have now is correct. This is the same as doing os.environ.get('foo', bar')

[mattrobenolt]

And yeah, I didn't realize this wasn't documented. Should definitely add that.

[wifasoi]

(sorry if i bother you.. but just for the records)
This is down to choice in the program behavior, but with your approach you can't use the "is define" statement. A possible work-around is to do the followings:
{% if environ('FOO', False) %}

[mattrobenolt]

@wifasoi I'd do this:

{% if environ('FOO') is none %}
it doesn't exist
{% else %}
{{ environ('FOO') %}
{% elseif %}

So instead of is defined you can just as easily use is none.