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

[Matthias Klose <doko@cs.tu-berlin.de>]

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