require a newer version of Sphinx

[alfredodeza]

The requirement for Sphinx is set to:

Sphinx>=1.4

But since this commit: 1799bb9d it is no longer possible to use Sphinx that is 1.8.4 or older (see sphinx-doc/sphinx@6d52b63eee)

If an environment with anything 1.8.4 or older will break with:

AttributeError: 'module' object has no attribute 'CPPUnionObject'

[vermeeren]

Yeah, it appears this should be changed to Sphinx>=1.8. I'll do this soon, thanks for reporting!

[t-b]

@melvinvermeeren While you are at it, why not add a requirements.txt for pip?

[alfredodeza]

what would the requirements.txt provide that setup.py doesn't @t-b ?

[t-b]

@alfredodeza With a requirements.txt developers can just do pip install -r requirements.txt to install the dependencies, setup.py does not help here. See also https://stackoverflow.com/a/43659126.

[vermeeren]

the requirements.txt appears to be inside requirements/production.txt, though it is also outdated, will fix this too while I'm at it

[vermeeren]

could you review the PR and see if this is fine?