'Repo2Docker' object has no attribute ‘debug'

[jhamman]

As reported by @sbinet,

When repo2docker raises an error, it is possible to get the following message on the command line:

'Repo2Docker' object has no attribute ‘debug'

This seems to come from this section:

https://github.com/jupyter/repo2docker/blob/ff894f4404a9abcbb5163f638f952a1ba89fe8b3/repo2docker/__main__.py#L335-L344

I am not sure exactly how the configuration system works here but I notice this is the only time the debug argument is accessed:

https://github.com/jupyter/repo2docker/blob/ff894f4404a9abcbb5163f638f952a1ba89fe8b3/repo2docker/__main__.py#L220-L221

cc @betatim who thought this also looked like a bug

[yuvipanda]

I think I missed adding a 'debug' boolean traitlet to repo2docker.app when I did some refactoring...

[betatim]

Yuvi, can you please make a PR that sets app.debug to true when the logging level is high enough?

[yuvipanda]

@betatim done #575

[jhamman]

Thanks @yuvipanda!!!