[Zope-CMF] Re: GenericSetup and removed products

[yuppie]

Hi!


Tres Seaver wrote:
> yuppie wrote:
>> Wichert Akkerman wrote:
>>> * on GS trunk I want to implement zcml-based import and export step
>>>   registration (I have a partial implementation but need to finish
>>>   that)
>> That means replacing the persistent local registries by a global 
>> registry, right?
> 
> I'm not in favor of that, at least not without more discussion.  I *am*
> in favor of replacing any import-time or 'initialize'-time registrations
> which touch module globals with ZCML.

Well. Right now there are no global step registrations, so there is 
nothing that can be simply replaced by ZCML.

> The persistent steps registered within a site's profiles *can't* be done
> via startup-time setup:  they reflect state which may be *important*,
> even if a module doesn't import at a given startup.

In the initial version of CMFSetup import_steps.xml and export_steps.xml 
did summarize the contents of the profile. Each step represented a part 
of the profile.

That concept is broken since extension profiles were added. Extension 
profiles re-use registrations made by other profiles, exports mix steps 
from different profiles. The step registries just represent a set of 
available handlers, not the configuration of the site.

So what's the important state information that might get lost if we 
remove the persistent steps?


Cheers,

	Yuppie