Indicate when reboot is required after Dom0 update

[marmarek]

The short story: already working in gpk-update-viewer!

The long story:
Data flow: gpk-update-viewer requests update list from PackageKit?, which fetch it from repository metadata using yum (via PackageKit? yum backend). Metadata sent to Packagekit by PackageKit?-yum can contain 'reboot_sugested' flag.
This flag can be triggered one of:

1. 'reboot_sugested' flag in updateinfo.xml.gz in repository metadata (details: ​http://en.opensuse.org/openSUSE:Standards_Rpm_Metadata_UpdateInfo)
2. package name listed in hardcoded pkg list:

   class PackageKitYumBackend(PackageKitBaseBackend, PackagekitPackage):
   
       # Packages there require a reboot
       rebootpkgs = ("kernel", "kernel-smp", "kernel-xen-hypervisor", "kernel-PAE",
                 "kernel-xen0", "kernel-xenU", "kernel-xen", "kernel-xen-guest",
                 "glibc", "hal", "dbus", "xen")
   

Because of the second option, IMHO there is no need to implement the first one. Which would BTW require some non-trivial work to do it securely, because repository metadata isn't signed by design - only packages have signature (currently we transfer only rpms to dom0 and then recreate metadata).

Of course all of this will work only when using "GUI mode" of qubes-dom0-update (--gui switch). This is default when called by qubes-manager or update-notification icon.

[joanna]

Ok, looks good. But there is one more thing -- updates to qubes-manager should probably automatically restart the manager... This might be done in the manager's %post perhaps?

[marmarek]

qubes-manager needs to be started in user environment (with some varibles from KDE - at least XAUTHORITY and DBUS session), but rpm is installed without access to it - in corner case from PackageKit? daemon...

Perhaps this can be done by doing exec() on some signal, which can sent from rpm %post?

[aga]

Manager restarting after update:

​http://git.qubes-os.org/?p=aga/qubes-manager.git;a=commit;h=a974f104352561f03262faef1ec649de10cbdd39