[Debian-med-packaging] Bug#649869: python-libtiff and kiki: error when trying to install together

[Ralf Treinen]

Package: kiki,python-libtiff
Version: kiki/0.5.6-7
Version: python-libtiff/0.3.0~svn78-1
Severity: serious
User: treinen at debian.org
Usertags: edos-file-overwrite

Date: 2011-11-24
Architecture: amd64
Distribution: sid

Hi,

automatic installation tests of packages that share a file and at the
same time do not conflict by their package dependency relationships has
detected the following problem:


WARNING: The following packages cannot be authenticated!
  libtinfo5 libkeyutils1 libkrb5support0 libk5crypto3 libkrb5-3
  libgssapi-krb5-2 libpcre3 libffi5 libglib2.0-0 libatk1.0-data libatk1.0-0
  libavahi-common-data libavahi-common3 libdbus-1-3 libavahi-client3 libcups2
  libdatrie1 libdrm2 libexpat1 libfreetype6 ucf ttf-dejavu-core
  fontconfig-config libfontconfig1 libjpeg8 libjasper1 libpng12-0 libtiff4
  libxau6 libxdmcp6 libxcb1 libx11-data libx11-6 libgdk-pixbuf2.0-0
  libglapi-mesa libxfixes3 libxdamage1 libxext6 libxxf86vm1 libgl1-mesa-glx
  libglu1-mesa libgtk2.0-common libpixman-1-0 libxcb-render0 libxcb-shm0
  libxrender1 libcairo2 libthai-data libthai0 libxft2 fontconfig libpango1.0-0
  libxcomposite1 libxcursor1 libxi6 libxinerama1 libxrandr2 libxml2
  shared-mime-info libgtk2.0-0 x11-common libice6 libsm6 libdb4.8 mime-support
  python2.7-minimal python2.7 python-minimal python python2.6-minimal
  python2.6 python-wxversion libwxbase2.8-0 libwxgtk2.8-0 python-wxgtk2.8 kiki
  python-libtiff

Extracting templates from packages: 38%
Extracting templates from packages: 77%
Extracting templates from packages: 100%
Preconfiguring packages ...
Authentication warning overridden.
Can not write log, openpty() failed (/dev/pts not mounted?)
Selecting previously unselected package libtinfo5.
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dpkg: error processing /var/cache/apt/archives/python-libtiff_0.3.0~svn78-1_amd64.deb (--unpack):
 trying to overwrite '/usr/share/pyshared/__init__.py', which is also in package kiki 0.5.6-7
configured to not write apport reports
Processing triggers for man-db ...
Errors were encountered while processing:
 /var/cache/apt/archives/python-libtiff_0.3.0~svn78-1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)


This is a serious bug as it makes installation fail, and violates
sections 7.6.1 and 10.1 of the policy. An optimal solution would
consist in only one of the packages installing that file, and renaming
or removing the file in the other package. Depending on the
circumstances you might also consider Replace relations or file
diversions. If the conflicting situation cannot be resolved then, as a
last resort, the two packages have to declare a mutual
Conflict. Please take into account that Replaces, Conflicts and
diversions should only be used when packages provide different
implementations for the same functionality.

Here is a list of files that are known to be shared by both packages
(according to the Contents file for sid/amd64, which may be
slightly out of sync):

  /usr/lib/python2.6/dist-packages/__init__.py
  /usr/lib/python2.7/dist-packages/__init__.py
  /usr/share/pyshared/__init__.py

This bug has been filed against both packages. If you, the maintainers of
the two packages in question, have agreed on which of the packages will
resolve the problem please reassign the bug to that package. You may then
also register in the BTS that the other package is affected by the bug.

-Ralf.

PS: for more information about the detection of file overwrite errors
of this kind see http://edos.debian.net/file-overwrites/.