[Zope-CMF] Re: [Zope-PAS] Re: Eggification redux

[Wichert Akkerman]

Previously Philipp von Weitershausen wrote:
> On 25 Sep 2007, at 13:20 , Jim Fulton wrote:
> >On Sep 25, 2007, at 3:40 AM, Philipp von Weitershausen wrote:
> >
> >>Charlie Clark wrote:
> >>>Am 25.09.2007 um 02:05 schrieb Tres Seaver:
> >>>>I'd like to break the remaining CMF packages out (moving from '/ 
> >>>>CMF' to
> >>>>'Products.CMFCore', 'Products.CMFDefault', etc.) and push the  
> >>>>2.1.0 eggs
> >>>>out, as well as equivalent changes for PluggableAuthService and
> >>>>PluginRegistry.
> >>>>
> >>>>Any objections, or other thoughts?
> >>>While I am very sceptical about the move to eggs (I know it's  
> >>>inevitable) and I hope we can avoid some of the problems that  
> >>>seem to be affecting Grok as a result.
> >>
> >>Grok's problems are primarily related to the lack of a working set  
> >>definition for Zope 3.
> >
> >I don't know what you mean by this.
> 
> There are several problems.
> 
> * We've had to nail some of the versions because buildout was being a  
> bit over-zealous when getting eggs on Windows. It would take the  
> newest egg, despite the fact that other eggs had binary releases. I  
> guess that's not its fault. But it's a working set problem.
> 
> * 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.

This is a real problem and something that has to be fixed. It will bite
us with the separate repositories Tres mentioned as well. You need to
be able to analyze the dependency/conflict graph before doing anything
or you will risk breaking a working system.

WIchert.

-- 
Wichert Akkerman <wichert at wiggy.net>    It is simple to make things.
http://www.wiggy.net/                   It is hard to make things simple.