Bug#738273: qgis-providers-common: fails to install, should use triggers for crssync

[Andreas Beckmann]

Package: qgis-providers-common
Version: 2.0.1-1
Severity: serious
User: debian-qa at lists.debian.org
Usertags: piuparts

Hi,

during a test with piuparts I noticed your package failed to install. As
per definition of the release team this makes the package too buggy for
a release, thus the severity.

>From the attached log (scroll to the bottom...):

  Setting up qgis-providers-common (2.0.1-1) ...
  /usr/lib/qgis/crssync: error while loading shared libraries: libblas.so.3: cannot open shared object file: No such file or directory
  dpkg: error processing package qgis-providers-common (--configure):
   subprocess installed post-installation script returned error exit status 127
  Setting up libexpat1:amd64 (2.1.0-4) ...
  Setting up libquadmath0:amd64 (4.8.2-14) ...
  Setting up libgfortran3:amd64 (4.8.2-14) ...
  Setting up libblas3 (1.2.20110419-7) ...
  update-alternatives: using /usr/lib/libblas/libblas.so.3 to provide /usr/lib/libblas.so.3 (libblas.so.3) in auto mode
  Setting up liblapack3 (3.5.0-2) ...
  update-alternatives: using /usr/lib/lapack/liblapack.so.3 to provide /usr/lib/liblapack.so.3 (liblapack.so.3) in auto mode


qgis-providers-common.postinst contains

    if [ "$1" = "configure" ] && [ -x /usr/lib/qgis/crssync ]; then
        /usr/lib/qgis/crssync
    fi

Looks like checking -x /usr/lib/qgis/crssync is not sufficient due to
libblas and liblapack using the alternatives system.
Since qgis-providers-common looks like a pure data package, adding
strict dependencies does not seem appropriate. So better use triggers
(in the package containing /usr/lib/qgis/crssync) that get activated
upon installation/upgrade of the qgis-providers-common package (by
declaring "interest" on the directories handled by crssync).


cheers,

Andreas
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