[Zope-CMF] Re: Eggification redux
tseaver at palladion.com
Tue Sep 25 09:53:39 EDT 2007
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Jim Fulton wrote:
>>>> * When package A depends on Y and package B also depends on Y,
>>>> but with some version restrictions, buidout will first try to get
>>>> the newest version of Y when installing A. But then when
>>>> installing B, it is likely that it has to get a different version
>>>> of Y. The result is a version conflict. This could also easily be
>>>> fixed with a working set that dictates which versions would be
>>>> used from the beginning.
>>> IN the long run, this would be better served by a better algorithm
>>> for constructing setuptools working sets.
>> ... which would require having access to the dependency data before
> No, not really, at least not in buildout's case. It's really not
> that big a deal to download a distribution that you ultimately don't
If we can keep setuptools from prematurely installing downloaded eggs,
sure; at the moment, it is trivial to get setuptools into a "false
conflict" situaltion, because it processes dependencies incrementally,
rather than solving the "transitive closure" of the graph before
attempting to install anything.
> I agree it might be better if the index made dependency data
Not exposing the dependency information in the index seems like a
missing-feature-is-really-a-bug to me.
Tres Seaver +1 540-429-0999 tseaver at palladion.com
Palladion Software "Excellence by Design" http://palladion.com
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