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<H1>[Mageia-dev] RFC: Add versioned require in rpm on rpm-helper</H1>
<B>Thierry Vignaud</B>
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TITLE="[Mageia-dev] RFC: Add versioned require in rpm on rpm-helper">thierry.vignaud at gmail.com
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<I>Mon Apr 16 11:36:09 CEST 2012</I>
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<PRE>On 16 April 2012 11:30, Thomas Backlund <<A HREF="https://www.mageia.org/mailman/listinfo/mageia-dev">tmb at mageia.org</A>> wrote:
>>>><i> That will work for urpmi that will upgrade rpm first before restarting
</I>>>>><i> but not for installer that doesn't need restarting itself (since we do
</I>>>>><i> not  use the system's urpmi).
</I>>>><i>
</I>>>><i> But AFAIK installer obeys rpm requires,
</I>
(...)
>><i> Read again what I wrote: installer doesn't do any priority upgrade since
</I>>><i> it doesn't need upgrading itself and doesn't use the installed system
</I>>><i> rpm/urpmi
</I>><i>
</I>><i> Ah, you only mentioned system urpmi (not rpm) first time.
</I>><i>
</I>><i> but wont installer already use correct rpm/rpm-helper, since it's built from
</I>><i> current cauldron packages?
</I>><i> (and can be rebuilt again after updated rpm-helper)
</I>
installer runs packages post-scripts in their chrooted environment,
aka the installed system.
>>><i> and since rpm is a priority package, it will be done in the beginning,
</I>>>><i> wont
</I>>>><i> it ?
</I>>><i>
</I>>><i> NO.
</I>><i>
</I>><i> but since it's already correct version in stage2, we should already be ok,
</I>><i> or... ?
</I>
Unless you add specific versionated requires, you've no guaranties that rpm
will get updated before foobar which has a systemd unit and requires
an up to date rpm-helper.
>>>><i> A somewhat nicer fix would be to auto generate some
</I>>>>><i> 'needs-systemd-aware-rpm-helper'
</I>>>>><i> requires for packages providing systemd units, having rpm-helper
</I>>>>><i> fulfil this provides
</I>>>><i>
</I>>>><i> Then we wouldn't need this.
</I>>><i>
</I>>><i> Yes we do
</I>><i>
</I>><i> So instead of fixing one package we will have to fix many packages :/
</I>
That has always be the way to do.
Any package should require what it needs for its post/pre scripts.
For systemd units, that means, an up to date rpm-helper.
Another way would be to alter the installer (see install/pkgs & media.pm)
in order to install first urpmi by handling priority upgrades w/o
actually restarting
itself of course. (Might need urpmi changes).
Or to explicitly upgrade rpm/rpm-helper first.
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