python-zope.component dependency question

[Brian Sutherland]

On Tue, Dec 01, 2009 at 10:07:57AM +0100, Brian Sutherland wrote:
> On Mon, Nov 30, 2009 at 05:43:19PM -0500, Rick McBride wrote:
> > Hi!
> >
> > One of the packages that my team's project uses depends on  
> > python-zope.compent. This package in turn pulls in python-zodb. It  
> > doesn't seem like that package is strictly necessary in all cases.
> >
> > Is it possible that this Depends: could instead be a Recommends: ?
> 
> You mean the "persistentregistry" setuptools extra, right? Not sure what
> is the best in this case, these are the things we can do with a
> setuptools extra:
> 
>     1 Keep them as dependencies of the main package (safe default)
>     2 Exclude them altogether
>     3 Move them to suggests
>     4 Move them to recommends
>     5 Move an extra into a metapackage named after it (i.e. 
>       python-zope.component-zcml for the zcml extra)
>     6 Move one or more extras into a randomly named metapackage
>         e.g. python-zope.component-extras which contains/provides:
>                 python-zope.component-zcml
>                 python-zope.component-persistentregistry
> 
> What option to select is not always obvious.
> 
> Options 2,3 and 4 mean that a python-zope.component-persistentregistry
> package will not be in Provides: leading to some packages being
> uninstallable [1]. I don't think this is appropriate for this extra of
> zope.component. Especially taking into account how fundamental
> zope.component is.
> 
> I think that the persistentregistry is different enough to the zcml
> extra that it shouldn't be lumped together in the same metapackage
> (option 6). So the only option left is 5.

On the other hand, you could argue that any package requiring a
persistent component registry will already be depending on the zodb in
any case. In that way the persistentregistry extra is probably not all
that useful and we'd be safe just having it as a Suggests/Recommends.

> 
> Any objections to me implementing option 5?
> 
> [1] Means a debian package with "zope.component [persistentregistry]" as
>     a dependency in it's setup.py and using van.pydeb to convert setuptools
>     dependencies into Debian dependencies.
> 
> > currently python-zodb appears to want python2.4 installed. We'd like to  
> > avoid that if at all possible.
> >
> > It was suggested that I look for the answer here.
> >
> > Cheers,
> >
> > Rick McBride
> >
> > _______________________________________________
> > pkg-zope-developers mailing list
> > pkg-zope-developers at lists.alioth.debian.org
> > http://lists.alioth.debian.org/mailman/listinfo/pkg-zope-developers
> 
> -- 
> Brian Sutherland

-- 
Brian Sutherland