Re: Some thoughts about py{support,central} -> dh_python2 conversion

[Jakub Wilk <jwilk@debian.org>]

* Jakub Wilk <jwilk@debian.org>, 2012-05-03, 21:41:
> > 2) Do not skip the "Before you begin"[0] step. This is very important: if two 
> > packages share a namespace, either both or none of them must use 
> > python-support. Also, it's not enough just to convert them all to dh_python2: 
> > you must make sure (using Breaks or Depends relationships) that you cannot 
> > co-install an older python-support-based versions together with 
> > dh_python2-based ones.
>
> An alternative might be using this trick:
> http://docs.python.org/library/pkgutil.html#pkgutil.extend_path
> (Though a convenient place to insert the code might not exist in some 
> cases.)
>
> This is what I did in my two packages:
>
> http://anonscm.debian.org/viewvc/python-modules/packages/gamera/trunk/debian/patches/namespace-package.diff?revision=21262&view=markup
> http://anonscm.debian.org/viewvc/python-modules/packages/sphinx/trunk/debian/patches/sphinxcontrib_namespace.diff?revision=20343&view=markup
>
> > I set up a page to track this kinds of issues in unstable[2] and 
> > testing[3]. Please note that I analyse only package contents, not 
> > relationships. The tracker is updated daily. (Any volunteers to 
> > file bugs?)

(Ping?)

> The pages moved to:
> [2] http://people.debian.org/~jwilk/python/namespace/conflicts-unstable.txt
> [3] http://people.debian.org/~jwilk/python/namespace/conflicts-testing.txt

Here's how it looks today:

> enthought:
>  pymodules: [python-apptools]
>  site-pkgs: [python-enthoughtbase]

This is a false-positive, and a weird one. "python-apptools" ships only one 
file in the "enthought" namespace:
/usr/share/pyshared/enthought/rst/sphinx_default/jquery.js
But there are no symlinks in /usr/lib/python2.X/ to that file, so don't know 
how's that supposed to work.

> repoze:
>  pymodules: [python-repoze.who, python-repoze.what-plugins, python-repoze.who-plugins, python-repoze.what, python-repoze.sphinx.autointerface]
>  site-pkgs: [python-repoze.lru, python-repoze.tm2]

True positive. If you install one package from the "pymodules" set and one from 
the "site-pkgs" set, the former package doesn't work.

"python-repoze.who-plugins" is in the worst situation, as it transitively depends 
on "python-repoze.lru".

> twisted:
>  pymodules: [cpushare]
>  site-pkgs: [python-axiom, python-twisted-news, python-twisted-lore, python-twisted-bin, calendarserver, ibid, python-twisted-runner-dbg, python-twisted-names, python-twisted-bin-dbg, python-twisted-words, python-cyclone, graphite-carbon, epoptes, python-twisted-core, python-twisted-web2, python-twisted-web, python-nevow, python-twisted-mail, python-twisted-runner, python-wokkel, python-twisted-conch]

"cpushare" ships (among other things) a twisted plugin that doesn't work. Not a 
regression; twisted has never used python-support.

> mysql:
>  pymodules: [python-mysql.connector]
>  site-pkgs: [mysql-utilities]

Work-around implemented in mysql-utilities.

> google:
>  pymodules: [python-protobuf]
>  site-pkgs: [python-google-apputils]

True positive. If you install both "python-protobuf" and "python-google-apputils", 
the former doesn't work.

> pywcs:
>  pymodules: [python-pywcs]
>  site-pkgs: [python-astropy-legacy]

Not co-installable.

> sphinxcontrib:
>  pymodules: [python-sphinxcontrib.issuetracker, python-sphinxcontrib.spelling]
>  site-pkgs: [python-sphinxcontrib.actdiag, python-sphinxcontrib-pecanwsme, python-sphinxcontrib.seqdiag, python-sphinxcontrib-programoutput, python-sphinxcontrib.blockdiag, python-sphinxcontrib.nwdiag, python-sphinxcontrib-httpdomain, python-sphinxcontrib.phpdomain]

Work-around implemented in python-sphinx.

> cherrypy:
>  pymodules: [python-cherrypy]
>  site-pkgs: [python-cherrypy3]

Not co-installable.

DD-list of the affected packages is attached.

--
Jakub Wilk

Bernhard Reiter <ockham@raz.or.at>
   python-repoze.sphinx.autointerface (U)

Debian Cloud Team <cloud-packages@lists.alioth.debian.org>
   google-apputils-python

Debian Python Modules Team <python-modules-team@lists.alioth.debian.org>
   python-apptools
   python-repoze.lru
   python-repoze.sphinx.autointerface
   python-repoze.tm2
   python-repoze.what-plugins
   python-repoze.who-plugins

Debian QA Group <packages@qa.debian.org>
   python-repoze.what
   python-repoze.who

Debian Scientific Computing Team <pkg-scicomp-devel@lists.alioth.debian.org>
   cpushare

Iustin Pop <iustin@debian.org>
   protobuf

Jan Dittberner <jandd@debian.org>
   python-repoze.tm2 (U)

Piotr Ożarowski <piotr@debian.org>
   python-repoze.what-plugins (U)
   python-repoze.who-plugins (U)

Robert S. Edmonds <edmonds@debian.org>
   protobuf (U)

Sam Hocevar <sam+deb@zoy.org>
   cpushare (U)

Stefano Zacchiroli <zack@debian.org>
   python-repoze.what-plugins (U)
   python-repoze.who-plugins (U)

TANIGUCHI Takaki <takaki@debian.org>
   python-repoze.lru (U)

Varun Hiremath <varun@debian.org>
   python-apptools (U)

Vincent Bernat <bernat@debian.org>
   google-apputils-python (U)