Bug#768286: python{, 3}-zope.interface-dbg: unhandled symlink to directory conversion: /usr/share/doc/PACKAGE

[Andreas Beckmann]

Followup-For: Bug #768286
Control: found -1 4.1.1-3

Hi,

I can still reproduce this issue on this upgrade path:

  squeeze -> wheezy -> jessie

Making piuparts a bit more verbose, I now get

1m49.9s ERROR: FAIL: silently overwrites files via directory symlinks:
  /usr/share/doc/python-zope.interface-dbg/changelog.Debian.gz (python-zope.interface-dbg) != /usr/share/doc/python-zope.interface/changelog.Debian.gz (python-zope.interface)
    /usr/share/doc/python-zope.interface-dbg -> /usr/share/doc/python-zope.interface
  /usr/share/doc/python-zope.interface-dbg/copyright (python-zope.interface-dbg) != /usr/share/doc/python-zope.interface/copyright (python-zope.interface)
    /usr/share/doc/python-zope.interface-dbg -> /usr/share/doc/python-zope.interface

Looks like you need to use the absolute path of the link
target in your .maintscript files:

-symlink_to_dir /usr/share/doc/python-zope.interface-dbg python-zope.interface 4.1.1-3~
+symlink_to_dir /usr/share/doc/python-zope.interface-dbg /usr/share/doc/python-zope.interface 4.1.1-4~

dpkg-maintscript-helper will try both 
  readlink $SYMLINKTOBECOMEADIRECTORY
and
  readlink -f $SYMLINKTOBECOMEADIRECTORY
and one of the must match the old target for actions to be taken.

(notice the version bump in the maintscript to catch upgrades that "failed" in -3)


Andreas