On Tue, Jun 22, 2021 at 09:10:52AM +0200, Florian Weimer wrote: > * Zbigniew Jędrzejewski-Szmek: > > >> glibc-gconv-extra is recommended by glibc, so a regular update or > >> default installation should pull in glibc-gconv-extra and there should > >> be no noticeable change unless a user explicitly removes > >> glibc-gconv-extra at some point. > > > > To preserve compatibility on upgrades, you should have > > Obsoletes:glibc < $NEW_VERSION in both glibc and glibc-gconv-extra. > > This causes dnf to install both packages when updating. This should > > be present independently of the Recommends and conditional Requires, > > which are mostly for new systems. > > I saw glibc-gconv-extra being installed during updates with the current > set of dependencies. Yes, because you have a conditional Requires on redhat-rpm-config, and you most likely have redhat-rpm-config, because it in turn is Required by many packages. But not all systems have to have it, and people might also have install_weak_deps=False in dnf.conf. Then the thing with Obsoletes becomes useful. (Effectively, if the system had certain functionality before the upgrade, it retains it after the upgrade, w/o the admin having to make any manual steps.) > It's the first time I read about this Obsoletes: stuff. Wouldn't it > cause deinstallation of glibc.i686 during updates that bring in > glibc-gconv-extra.x86_64? If not, where can we find documentation how > this is supposed to work? The Obsoletes is versioned. So in principle dnf should notice that it needs to install new versions of glibc.x86_64 *and* glibc.i686. But this is a rather complex case, so I recommend triple-testing the whole thing ;) See https://bugzilla.redhat.com/show_bug.cgi?id=1261034 for some gory history. I'm not sure if there's better documentation. https://src.fedoraproject.org/rpms/systemd/c/f455b2249ac56d83b05ae75ebfc8bc792e529399?branch=rawhide is an example of handling of a split in systemd when systemd-networkd was split out. I test this by building the packages in mock, and then calling 'sudo dnf upgrade /var/lib/mock/*/results/*[46h].rpm'. When the Obsoletes are done correctly, the split-out subpackage will be added to the transaction. One common mistake I do is forgetting to bump the version in Obsoletes on the main package. Zbyszek _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
