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<H1>[Mageia-dev] RFC: Add versioned require in rpm on rpm-helper</H1>
<B>Colin Guthrie</B>
<A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20RFC%3A%20Add%20versioned%20require%20in%20rpm%20on%20rpm-helper&In-Reply-To=%3C4F8C1D64.6050909%40colin.guthr.ie%3E"
TITLE="[Mageia-dev] RFC: Add versioned require in rpm on rpm-helper">mageia at colin.guthr.ie
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<I>Mon Apr 16 15:23:48 CEST 2012</I>
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<PRE>'Twas brillig, and Thierry Vignaud at 16/04/12 13:04 did gyre and gimble:
><i> On 16 April 2012 13:15, Colin Guthrie <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">mageia at colin.guthr.ie</A>> wrote:
</I>>><i> <snip>
</I>>><i>
</I>>><i> So just to make sure I'm following this right:
</I>>><i> 1. Versioned require will fix urpmi-based upgrades.
</I>>><i>
</I>>><i> 2. Installer (fresh-install) will be fine because basesystem-minimal
</I>>><i> will pull in rpm which will pull in rpm-helper. WE can be confident
</I>>><i> this will happen early.
</I>><i>
</I>><i> No you cannot on upgrade.
</I>><i> Package ordering will depends on versioned requires.
</I>
I don't understand... This is a fresh install, where did upgrade come
into it?
Just to clarify, the *fresh install* case is fine, it's the *upgrade*
case (which I specifically outlined separately below to avoid confusion
- although that clearly failed) that has the problem. Correct?
>><i> 3. Installer (upgrade) will still be broken as it does not treat the
</I>>><i> rpm package inside the chroot as any kind of priority update that is
</I>>><i> installed early in the upgrade process.
</I>><i>
</I>><i> installer upgrade will be OK if systemd unit packages require a recent
</I>><i> enough rpm-helper
</I>
I wasn't really looking for solutions, just trying to understand the
problem clearly. Proposed solutions often cloud the thinking about the
problem itself.
So putting "Requires(pre): systemd-units" in all packages providing a
systemd unit seems wrong (it doesn't require systemd-units at all, so
this is a fake requires).
Putting "Requires(pre): rpm-helper >= $ver" also seems somewhat overkill
and hard to maintain (e.g. what if some other new thing goes into
rpm-helper? We have to rebuild all packages that use any of the macros
inside it to get the appropriate versioned require which seems awkward
and hard to maintain[1]).
Wouldn't it simply be easier to make the installer aware of priority
updates? That way we don't need to maintain different or convoluted
solutions for the same problem.
I suspect problems like this have been present in the past but were less
noticeable due to the minor differences in rpm-helper package. This time
round it's obviously quite important!
Col
1. By "hard to maintain" I don't really mean in individual specs (it
should be simple enough to parse out any use of the rpm-helper macros
from a spec and automatically add a "Requires(post|preun): rpm-helper >=
$curver" automatically), but rather knowing to rebuild all the packages
as and when needed. It would be nice to now worry about this as a packager.
--
Colin Guthrie
colin(at)mageia.org
<A HREF="http://colin.guthr.ie/">http://colin.guthr.ie/</A>
Day Job:
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