python26 note

[BJ Dierkes]

On Oct 4, 2010, at 3:49 PM, Toshio Kuratomi wrote:

> On Mon, Oct 04, 2010 at 08:35:00PM +0200, Mathieu Baudier wrote:
>> Hello Kevin,
>> 
>>> Reviewers and submitters of new packages welcome. :)
>> 
>> I had to rebuild the following two packages so that they are python26 modules:
>> 
>> python26-mod_wsgi
>> http://elgis.argeo.org/repos/testing/5/elgis/SRPMS/repoview/python26-mod_wsgi.html
>> 
> mod_wsgi will need some work above and beyond simply rebuilding so that we
> can get the python-library-it's-built-against right.  When we add mod_wsgi
> we'd have:
> 
> mod_python
> mod_wsgi
> python26-mod_wsgi
> 
> I believe that a later version of mod_wsgi can also be built against
> python-3.x so then we'd also have python3-mod_wsgi
> 
> In Fedora we'd probably handle this with the apache config files that check
> whether incompatible modules are loaded and if not, then load the module.
> 
> In EPEL, maybe you want to allow explicit Conflicts tags to take care of
> this case?  (It would be a difference between Fedora and EPEL packaging
> guidelines but it may make sense.)

This same issue/question came up in my review for mod_python26:

https://bugzilla.redhat.com/show_bug.cgi?id=638362


Originally I had an explicit 'Conflicts: mod_python' which was inherited from the package in IUS (based on IUS policy).  The packages conflict because they both provide python_module.  As noted in the ticket... even if mod_python26 was patched to work side-by-side with mod_python... all of the Apache directives provided by python_module and/or python26_module would still conflict.... meaning they can't be installed and run simultaneously.  The options seem to be:

 * Make the package explicitly conflict
 * Add an IfModule check for python_module, and if it isn't already loaded then load from mod_python26


To me, the first option is very clear and makes sense.  From a users perspective... if they install mod_python26 while mod_python is installed... they may be a bit confused as to why mod_python26 just "doesn't work".

Would be helpful to get some more feedback from the list on which approach to take.  The IfModule approach is fine as long as /etc/httpd/conf.d/python26.conf is commented clearly.. and assuming the end users reads the comments in the file.

---
derks