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List:       gentoo-dev
Subject:    Re: [gentoo-dev] PyXML
From:       Arfrever Frehtes Taifersar Arahesis <Arfrever () gentoo ! org>
Date:       2011-05-17 20:53:03
Message-ID: 201105172253.04350.Arfrever () gentoo ! org
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2011-05-17 21:21:48 Tomáš Chvátal napisał(a):
> Dne 17.5.2011 21:12, Arfrever Frehtes Taifersar Arahesis napsal(a):
> > 2011-05-17 20:43:29 Tomáš Chvátal napisał(a):
> >> Dne 10.5.2011 23:21, Arfrever Frehtes Taifersar Arahesis napsal(a):
> >>> PyXML is dead:
> >>>   http://mail.python.org/pipermail/xml-sig/2004-November/010735.html
> >>>   http://mail.python.org/pipermail/xml-sig/2006-June/011545.html
> >>>
> >>> PyXML provides _xmlplus module, which replaces xml module (from standard library) at run time,
> >>> which might result in various problems.
> >>>
> >>> I'm planning to implement the following solution:
> >>> - Python >=2.7.1-r2:2.7 will provide xml.use_pyxml() function. Calling of this function will be
> >>>   necessary to use replace xml module with _xmlplus module. Python >=2.7.1-r2:2.7 will be added
> >>>   to the tree in next week and will be temporarily package.masked. Later this change will be
> >>>   backported to new versions in older slots.
> >>> - All packages, which use PyXML, will have to be patched to call xml.use_pyxml(). The following
> >>>   code should be added before first import of anything from xml module:
> >>>
> >>> import xml
> >>> if hasattr(xml, "use_pyxml"):
> >>>     xml.use_pyxml()
> >>>
> >>>   This code works with previous versions of Python, so no changes in dependencies are needed.
> >>>
> >> As I already asked,
> >> what problem do we have to keep PyXML in main tree to be used with python2.
> >>
> >> Your specific hack introduce different behaviour for python2.7.1-r2
> >> where you do not explain the need for it at all.
> >
> > I had already explained it in many places.
> >
> >> It is just python2 thing and we can happily use PyXML as it works even
> >> with latest python-2.7.
> >>
> >> So where is the problem?
> >
> > Fixes for at least the following bugs are absent when PyXML is installed:
> > http://bugs.python.org/issue4877
> > http://bugs.python.org/issue6098
> > http://bugs.python.org/issue5762
> > http://bugs.python.org/issue5027
> > http://bugs.python.org/issue9054
> > http://bugs.python.org/issue777884
> > http://bugs.python.org/issue1433694
> > http://bugs.python.org/issue847665
> > http://bugs.python.org/issue1472827
> > http://bugs.python.org/issue1094164
> > http://bugs.python.org/issue1309009
> > http://bugs.python.org/issue1262320
> > http://bugs.python.org/issue925152
> >
> 2 options
> 1) fix PyXML
> 2) drop all packages including PyXML
> 
> Altering system package is not the option.

Changing of any package is always an option, when given change fixes or works around a problem
and its benefits outweigh costs. The patches for about 20 packages will be easy to maintain,
since there is easy algorithm of generation of these patches (addition of constant 3-line code
before first import of xml module).

-- 
Arfrever Frehtes Taifersar Arahesis

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