[Mageia-dev] RFC: Add versioned require in rpm on rpm-helper

[Pascal Terjan]

On Mon, Apr 16, 2012 at 14:23, Colin Guthrie <mageia at colin.guthr.ie> wrote:
> 'Twas brillig, and Thierry Vignaud at 16/04/12 13:04 did gyre and gimble:
>> On 16 April 2012 13:15, Colin Guthrie <mageia at colin.guthr.ie> wrote:
>>> <snip>
>>>
>>> So just to make sure I'm following this right:
>>>  1. Versioned require will fix urpmi-based upgrades.
>>>
>>>  2. Installer (fresh-install) will be fine because basesystem-minimal
>>> will pull in rpm which will pull in rpm-helper.  WE can be confident
>>> this will happen early.
>>
>> No you cannot on upgrade.
>> Package ordering will depends on versioned requires.
>
> 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?
>
>>>  3. Installer (upgrade) will still be broken as it does not treat the
>>> rpm package inside the chroot as any kind of priority update that is
>>> installed early in the upgrade process.
>>
>> installer upgrade will be OK if systemd unit packages require a recent
>> enough rpm-helper
>
> 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]).

If a package requires a new script, it means there is a call to this
script, so I would expect that it was built after this new script was
added.