[Yum] RPM requires tag: installation order in yum?

[Werner Fischer]

Hi again,

has anyone an idea on this?
Unfortunately I'm still confused and didn't find and explanation up to
now.

thanks,
Werner

On Fri, 2006-12-29 at 11:50 +0100, Werner Fischer wrote:
> Hi list,
> 
> I am a little bit confused on how yum/rpm resolve dependencies
> ("requires" tag) to find the correct installation order of packages.
> 
> In this post 
> https://lists.dulug.duke.edu/pipermail/yum/2005-September/007485.html
> someone asks about the installation order and gets the answer:
> "The "Requires:" lines only say that after that total rpm transaction
> the requirements are fullfilled, they do not specify any install order.
> For forcing an install order, you should use "Prereq:" i.s.o. "Requires"."
> 
> But according to [1] and [2] the "requires" tag do specify an install order
> and "prereq" seems to be obsolete.
> 
> So does yum now care about requires in a sense that it looks for the right
> installation order?
> 
> Many thanks in advance for your help and thank you for developing yum!
> best regards,
> Werner
> 
> [1] http://www.rpm.org/max-rpm-snapshot/s1-rpm-depend-manual-dependencies.html#S3-RPM-DEPEND-PREREQ
> "A plain Requires is _enough to ensure proper installation order_ if
> there are no dependency loops present in the transaction."
> 
> [2] http://www.redhat.com/archives/rpm-list/2003-June/msg00173.html
> "Yes, historically the PreReq: had a guarantee of being installed before package that
> has PreReq:, so many packages still use PreReq:. However, this guarantee
> has been extended to Requires:, so the two are synonyms."
> 
> 
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