Dne 05. 06. 20 v 8:41 Kevin Kofler napsal(a):
The fact that Obsoletes from outdated packages are being considered is the
bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1748187
but the DNF developers refused to acknowledge this and just closed the bug
when the issue was worked around in the font package somehow.
This is nothing that can be fixed in DNF directly.
DNF passes packages to libsolv to resolve the transaction and it can
only cherry-pick packages for the transaction or set transaction flags.
If you want change in behavior, please open a discussion with libsolv's
upstream. The currently supported flags are:
https://github.com/openSUSE/libsolv/blob/master/doc/libsolv-bindings.txt#constants
If I understand correctly how the sat-solver works, it's populated with
a set of rules before the transaction is resolved and it's not possible
to tweak in on fly as yum did. It could be possible to pre-process the
packages and hide Obsoletes of older packages, but what if the latest
package has broken deps and doesn't get into transaction? DNF in Fedora
has best=0. In that case the older package would get into transaction
and its Obsoletes would be ignored - and that's definitely something we
don't want.
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