[Zope-CMF] Re: GenericSetup and removed products

[Wichert Akkerman]

Previously Tres Seaver wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> Wichert Akkerman wrote:
> > We are seeing a common GenericSetup related bugreport for Plone 3:
> > people migrating to Plone 3 correctly remove products that are not
> > yet supported on Plone 3. However those products may have a registered
> > GS import or export step which is not removed. The result is that GS
> > tries to run import/export code from a product which no longer exists
> > and aborts with an ImportError. Since the only way to remove the
> > step registration is by manually tweaking internal data structure of
> > the setup tool this is somewhat painful.
> > 
> > To fix this I want to do two things:
> > 
> > * on GS trunk I want to implement zcml-based import and export step
> >   registration (I have a partial implementation but need to finish
> >   that)
> 
> +1.  In fact, I thought I had done that already (I see that was only
> profile registration, and not step registration).
> 
> > * on the maintenance branch add a try/except to catch import errors and
> >   either ignore those or remove the step if they occur.
> 
> +1 for logging / ignoring them (for extra bonus points, indicate somehow
> in the UI of the import tab that the step is known to be borked).  My
> rationale is that the product supplying the step might be temporarily
> broken.  Perhaps the UI which indicates the broken step could allow the
> user to remove that step manually?

It could, but I'ld rather spend more time on doing zcml-based
registration than doing a full UI which will no longer be needed once we
switch to the zcml-approach.

> BTW, I'm assuming that this information is relevant to this issue:
> 
>   http://www.zope.org/Collectors/CMF/497

Indeed it is.

Wichert.

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