On Thu, Jul 12, 2012 at 12:03 PM, Daniel Holth dholth@gmail.com wrote:
+1 To this. I agree Setup-Requires and Provides-Extra are different use cases and should both be added to the spec. I think that filling in these two missing features will benefit packaging in the long run. If this idea gains some amount of acceptance I'm happy to work on an implementation of the setup-requires end of things for packaging.
One last addition, explicitly allow X- headers. IMO the technical purpose of each tag is solid. I would like to get this implemented by the end of July so that it can be used.
If there are no further comments, I will ask Benjamin Peterson to merge this into python-peps this weekend.
To avoid NameError, distutils2 should define extra == None by default until it supports extras (simply not installing any extra dependencies), or markerlib should just be folded in. For markerlib's Python 2.4 problem a fallback that doesn't require _ast is either the current distutils2 marker implementation, or to evaluate empty markers as True, and non-empty markers as False, so only installing unconditional dependencies; I don't suppose many Python 2.4 users are clamoring to adopt .dist-info & Metadata 1.2...
Thanks,
Daniel Holth