On Nov 15, 2007, at 9:38 PM, Martin Aspeli wrote:
For fun, I just tried to make use of adapters and utilities,
registered with ZCML, in a Pylons application.
I installed Pylons in a virtualenv, and easy_installed
zope.component and zope.interface using the KGS index for 3.4. I
used zope.configuration (also installed) to load a site.zcml, which
currently just has:
<include package="zope.component" file="meta.zcml" />
That doesn't work - it complains about not finding zope.security.zcml.
That's because the zope.component.zcml supports specifying
permissions on components. The zcml support never should have been
added to zope.component. This also illustrates the false promise of
extras. The package has zcml support which you expected to be able
to use. After all, it is there. To use zcml, you have to specify the
zcml extra. This brings the rest of zope with it.
I added the extras myself, despite my dislike of extras, because it
was the only way to make zope.component usable without the rest of
Zope and without major refactoring and backward incompatibility.
Then I tried to easy_install zope.security, but this pulled in most
of Zope, including the ZODB, ZConfig and zdaemon. That's a real
shame - no CA (at least not with ZCML) without having pretty much
all of Zope there. :(
But you can use the CA without zcml without the rest of Zope. This
should not be under appreciated.
I also think extras are a farce. This should not be under appreciated
Actually, I never got to try it further, because this then died with:
error: Installed distribution zope.traversing 3.4.0 conflicts with
Are the Zope eggs ready for prime time? Maybe I should be doing it
Some of them are and some aren't. zope.component will work with just
a few packages if you don't use the zcml or persistence support.
I'm curious about how to go about this, since it seems like an
incredibly useful thing to be able to do: Make use of the CA in a
non-Zope Python application. :)
You can. You just can't use it's zcml support -- which is highly zope
specific. Note that there could conceivably be other zcml support
that isn't zope specific, but the zcml support in zope.component was
moved from zope.app where it really should have stayed.
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