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<H1>[Mageia-dev] Proposed Feature:Backports_update_applet</H1>
<B>andre999</B>
<A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20Proposed%20Feature%3ABackports_update_applet&In-Reply-To=%3C4FD3B7D3.7040609%40laposte.net%3E"
TITLE="[Mageia-dev] Proposed Feature:Backports_update_applet">andre999mga at laposte.net
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<I>Sat Jun 9 22:53:39 CEST 2012</I>
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<PRE>blind Pete a écrit :
><i> Samuel Verschelde wrote:
</I>><i>
</I>><i>
</I>>><i> Following Backports opening due soon, and since our policy is that
</I>>><i> backports are supported (security, bugfix), we need a way to push backport
</I>>><i> updates for users who installed backports. Otherwise, we can't really say
</I>>><i> that we're providing security updates to our backports.
</I>>><i>
</I>>><i> My feature proposal is to implement something similar to what mgaonline +
</I>>><i> MageiaUpdate does for updates, but for backports, with some changes due to
</I>>><i> the fact that users will rarely want that "all" packages on the system be
</I>>><i> updated from backports when the backports media are activated.
</I>>><i>
</I>>><i> <A HREF="https://wiki.mageia.org/en/Feature:Backports_update_applet">https://wiki.mageia.org/en/Feature:Backports_update_applet</A>
</I>>><i>
</I>>><i> I don't think I can do the dev myself. I can work on more detailed
</I>>><i> specifications with a developer though.
</I>>><i>
</I>>><i> Samuel
</I>>><i>
</I>><i> There are a multiple ways that this problem could be handled.
</I>><i> Yours is one.
</I>><i>
</I>><i> Samuel's way:
</I>><i>
</I>><i> Need "something" to know that a backport package
</I>><i> has been installed, to remember that fact, and to do an extra
</I>><i> backport update search when looking for updates.
</I>><i>
</I>><i> It would need to keep working if the user changed desktop
</I>><i> environments, or even stopped used a desktop and just used
</I>><i> the command line. Does mgaonline do this? There could be
</I>><i> room to improve that.
</I>><i>
</I>><i> If it can be detected that a backport package has been installed
</I>><i> (or less efficiently, detect that a backports repository
</I>><i> has been activated) set up a cron job (or reconfigure mgaonline)
</I>><i> and leave it like that for the life of the installation.
</I>><i>
</I>><i> Geeks way:
</I>><i>
</I>><i> Only use urpmi as a command line tool and edit urpmi.cfg with vi.
</I>><i>
</I>><i> When activating a backports repository mark it as an update
</I>><i> repository. Then update with "urpmi --excludemedia [backport media, ...]"
</I>><i> accepting all suggestions, followed by "urpmi --auto-select"
</I>><i> and look at what is offered before accepting.
</I>><i>
</I>><i> My suggestion:
</I>><i>
</I>><i> Add "bp" to the package name and have separate backports update
</I>><i> repositories.
</I>><i>
</I>><i> Users would then be able to cherry pick from backports and
</I>><i> updates should _just work_ without extra intervention.
</I>><i>
</I>><i> The only difficulty that I can think of is, when a backport
</I>><i> (or backport update) package is pushed to updates. It would
</I>><i> not be necessary to do a real update but the rpm database
</I>><i> should be updated such that version N-bp supersedes version N.
</I>><i> (And the N-bp packages should be removed from the repositories.)
</I>><i>
</I>><i> Can anyone see any holes in the logic?
</I>><i>
</I>><i> What would be easiest to implement?
</I>><i>
</I>><i>
</I>You got me thinking :)
- Just marking all backport repos as update repos is almost enough to
solve the problem, in terms of the tools installing the backports.
Great idea !
We just have to tweak the tools so that a backport is only installed as
an update of a backport.
- Note that we should allow a non-backport to replace a backport, as
will likely be encountered in a release update. If the versioning is
properly done (according to established packaging policy), a
non-backport in a newer release will have a higher version number, thus
replacing the backport.
- Functioning as an update, it would only replace already installed
backports, once the tools are appropriately adjusted.
- As with any update repo, one could always explicitly install a
backport which is not already installed. No special treatment is
required for this.
- using "bp" in the file name is nice and short, and definitively marks
it as a backport for the tools, and for the user once installed. (I
would put it in the revision field.)
I like this approach, as it doesn't matter from where the package is
installed; it will always be recognized as a backport.
So I'm suggesting a variation of the last 2 solutions.
I think that this would be relatively easy to implement.
The trick is to find the right place in the code for the tweaks.
(tv could probably do it really fast.)
--
André
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