Florian Festi wrote:
Hi!
Small behavior change for obsoletes:
Issue an error if to be installed pkgs are obsoleted by already
installed pkgs. As obsoleting pkgs are logically newer "--oldpackage"
should be required to install the obsoleted pkg IMHO. Right now
obsoleted pkgs are happily installed.
There's an issue here, caused by the fact that obsoletes is not only
used to rename a package when the old one is going away forever (think
fileutils -> coreutils), but also to give a hint of package discovery
when the repo is replacing one package with a different work to provide
the same functionality.
The canonical concrete example here is routing daemons. Once upon a
time we shipped gated. Then it didn't get maintained very well, and
zebra came along. So zebra got "obsoletes: gated". Then zebra didn't
get it's share of maintenance upstream, but gated did. So gated got an
obsoletes on zebra. And now there's a loop.
If the obsoletes don't have version information in them (which is
generally preferred for the rename case), then there's a loop that your
criteria above can't solve.
This is part of why Conary puts packages in revision trees.
--
Peter
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