python-zope.component dependency question

[Brian Sutherland]

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.

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
>
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-- 
Brian Sutherland