* Andreas Beckmann <deb...@abeckmann.de>, 2012-01-13, 11:40:
during a test with piuparts I noticed your package fails to upgrade from
squeeze. It installed fine in squeeze, then the upgrade to wheezy fails
because it tries to overwrite other packages files without declaring a
replaces relation.
See policy 7.6 at
http://www.debian.org/doc/debian-policy/ch-relationships.html#s-replaces
From the attached log (scroll to the bottom...):
Selecting previously deselected package libuim7.
Unpacking libuim7 (from .../libuim7_1%3a1.7.1-3_amd64.deb) ...
dpkg: error processing /var/cache/apt/archives/libuim7_1%3a1.7.1-3_amd64.deb
(--unpack):
trying to overwrite '/usr/lib/libuim-custom.so.2', which is also in package
libuim6 1:1.5.7-9.1
http://piuparts.debian.org/squeeze2wheezy/fail/uim-utils_1:1.7.1-3.log
Probably
Conflicts: libuim6
Replaces: libuim6
will be needed because the libuim6 package may be unusable after
installing libuim7 and will be unusable after installing and removing
libuim7 because some file has disappeared.
Normally multiple versions of shared library packages should be
co-installable with each other. So a better way to fix this would be to
move libuim-custom and libuim-scm libraries into separate packages and
make _them_ conflict with libuim6. (This still does not allow
libuim{6,7} co-installability, but at least will help to avoid such bugs
in the future.)
--
Jakub Wilk
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