Re: Bug#378604: dh_python generates dependencies on unversioned python versions for versioned python modules

[Brian Sutherland <jinty@web.de>]

On Tue, Jul 18, 2006 at 11:53:26AM +0200, Matthias Klose wrote:
> Raphael Hertzog writes:
> > tag 378604 + patch
> > thanks
> > 
> > On Mon, 17 Jul 2006, Matthias Klose wrote:
> > > Package: debhelper
> > > Version: 5.0.37.3
> > > Severity: important
> > > 
> > > Looking at python2.4-schoolbell, ${python:Depends} is expanded to
> > > 
> > >   python-central (>= 0.5), python (<< 2.5), python (>= 2.4) | python2.4
> > > 
> > > which is wrong.
> > 
> > It's not really wrong... but it's not really optimized for the purpose of
> > the package.
> > 
> > The package puts files in /usr/lib/python2.4/site-packages so it won't
> > work with python2.5 ... the "python (<< 2.5)" guarantees that.
> > 
> > There's no script using "#!/usr/bin/python2.4" otherwise you would have
> > had a dependency "python2.4" ...
> > 
> > In theory, looking at the package it should have gotten a "python (>=
> > 2.4), python (<< 2.5)" dependency however since that's not satisfiable in
> > sid right now, it has been loosened to the dependency above.
> > 
> > If modules are meant for public uses, they should work with all python
> > versions and in that case the dependency they get is the right one. But in
> > this case, we have public modules which are not really meant to be used by
> > the end-user and which are only used by one application and thus compiled
> > for the version that this application uses.
> 
> all the modules are for public use. however zope3 is only available
> for python2.4 (and not above), so the same is needed for packages
> depending on zope3. You have two hints that a dependency on a
> unversioned python is unwanted:
> 
>  - XS-Python-Version is explicitely set
>  - the package is named python2.4-xxx

FYI, in the schooltool packages for the next upstream release, the
package name will take the form python-xxx.

However the XS-Python-Version will continue to be set to a subset of the
python versions of the its dependencies (zope3 being the main culprit).

-- 
Brian Sutherland

Metropolis - "it's the first movie with a robot. And she's a woman.
              And she's EVIL!!"