Sorry,
I didn't want to bring that issue up before F8 is out as I was assuming that
most people are quite busy. But as obsoletes seam to blow up right now...
It starts with a simple question:
What's the policy about failing test cases? Do we keep them disabled until
the yum behavior matches the expectations of the test case? Do we check them
in at all? Do we just let them fail?
Behind this there are some much further going issues. First thing to mention
here is multilib. While reading various fedora mailing lists and IRC
channels I got the impression that this issue is going to be revisited and
reconsidered in the near future (F9 time frame?).
Additionally there are several other issues that need a closer look:
obsoletes (which trouble us right now), conflicts (which are on the todo
list anyway) and any combinations with each other and (multilib) updates.
While the multilib issue needs to be discussed on a wider base I still
belief we should have a well founded technical opinion where there are
problems with the current implementation and what options we have to solve
them. In fact I belief we should come up with a plan before everyone else
starts chitchatting on that topic.
Beside a higher level discussion on what consistency constrains we want and
can impose on yum's behavior we need a way to nail things down to single
issues. The proper tool for that would be test suite that is build round the
scenarios in question.
In addition of being a good base of discussion such test suite could also
document and fortify the "right" behavior and establish trust into the code
base. It will also allow changing the behavior of yum with less worries
about breaking something else. In fact it has been on our todo/wish list for
quite some time.
While writing some test cases I realized how easy it is to come up with a
new scenario and how easy you run into situations where it isn't obvious if
yum's behavior is really the right one. As a result of this first impression
I am planning to come up with an even bigger number of test cases (several
more dozens at least) and then start picking the most interesting of them to
discuss single decisions made in the depsolver or by commands (install,
update, remove, ...).
Stay tuned
Florian
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