%package tools
Summary:        Tools from glib2, a general-purpose utility library
# ensure libgio-2_0-0 is updated before glib2-tools' ensures glib-compile-schema to
# be functional when the file trigger fires ([boo#1178713](https://bugzilla.opensuse.org/show_bug.cgi?id=1178713))
Group:          Development/Libraries/C and C++
Requires(post): %{libgio} = %{version}
Requires(preun): %{libgio} = %{version}

I somewhat doubt this will work - for the 'transaction' to be valid:

• during preun, we need the old version (as that's the preun script being run, so that requirement means: install libgio AFTER removing / updating glib2-tools
• Requires post (of the new version) though asks for the NEW version of libgio - otherwise glib2-tools would 'not be installable)

That means, the transaction would only be valid when: uninstall glib2-tools, upgrade libgio, install glib2-tools; but that's not how RPM operates in upgrade scenarios

Would just
Requires(preun): %{libgio}
avoid breaking upgrade transactions? I'm trying to fix the order of uninstallation when removing glib2-tools so that libgio isn't uninstalled first.

I assume the postun trigger is there for upgrades. An alternative to this would be to make the scriptlet exit gracefully if glib2-compile-schemas can't be run. I just looked at what Red Hat does, and they have a || : at the end of their postun trigger, so maybe that is the right thing to do.

Dominique Leuenberger (dimstar) - 2 days ago

reviewer target maintainer

That should work