[pulseaudio-discuss] [PATCH] module-gsettings: new module to store configuration using gsettings

[Sylvain Baubeau]

2016-10-04 13:04 GMT+02:00 Tanu Kaskinen <tanuk at iki.fi>:

> On Fri, 2016-09-30 at 23:21 +0200, Sylvain Baubeau wrote:
> > 2016-09-27 21:32 GMT+02:00 Felipe Sateler <fsateler at debian.org>:
> > > I have to say I'm not sure how an upgrade scenario would play out. My
> > > understanding currently is as follows:
> > >
> > > 1. paprefs can ship a file for gsettings-data-convert, which migrates
> > > the settings.
> > >
> > > 2. However that tool is only run at login.
> > >
> > > 3. As a consequence, the paprefs tool can be in an inconsistent state
> > > after an upgrade and before the next login.
> > >
> > > It seems that the problem is resolved by papfrefs triggering the tool
> > > on startup as suggested by the gnome documentation[1].
> > >
> >
> > Thanks for pointing this out. I updated my paprefs patch to apply
> > paprefs.convert at startup.
>
> Would it be feasible for you to make it a build time option to use
> gconf or gsettings in paprefs?
>

Yes, I think it's feasible but the code would need quite a lot of rework.


>
> > > However that leaves us with another problem, as the pulseaudio daemon
> > > is not restarted automatically after an upgrade, and thus gsettings
> > > module might not be loaded. But, I hope paprefs can already deal with
> > > such a scenario and prompt the user accordingly.
> > >
> >
> > Unfortunately, paprefs does not deal with such a scenario. It will
> > therefore be able to modify the configuration but this configuration will
> > only take effect when pulseaudio is restarted. What do you suggest
> > prompting the user with ?
>
> Figuring out a good message is tricky. paprefs could just say "module-
> gsettings not loaded", but it would be nice to able to tell the user
> what to do. However, module-gsettings not being loaded may be because
> the server is too old version and doesn't support module-gsettings at
> all (distributions can deal this by depending on new enough server,
> though), or it has been removed from default.pa and needs to be added
> there, or the server has been updated but not restarted. The last
> reason is the most likely one in the beginning, but over time it
> becomes less and less likely, so just saying "restart pulseaudio" or
> "reboot the machine" probably isn't a good idea.
>
> > > In debian there is only paprefs depending on module-gconf. I don't
> > > think we'll keep module-gconf after paprefs has migrated.
>
> If we release a pulseaudio version with module-gsettings before we
> release paprefs with gsettings support, will you run pulseaudio with
> both gconf and gsettings enabled, or only with gconf? Running with both
> would have the benefit that if everything goes well, the data will be
> migrated without any glitch when the new paprefs version is run for the
> first time, because module-gsettings will be already loaded. The risk
> with that is that the migration can't be tested at the time you enable
> module-gsettings, since paprefs isn't ready. If there's some unforeseen
> problem when paprefs is finally updated, and module-gsettings needs to
> be fixed in some way, the migration might become even more complex,
> because you need to deal with detecting a situation where the server is
> running with a broken version of module-gsettings.
>
>
You're right, it's probably too complicated. It's better to stick with
GConf.

Regards,
Sylvain



> --
> Tanu
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