[aur-general] the *scotch* issue

[George Eleftheriou]

Dear Gordian Edenhofer,

You are right :-) ( i hadn't yet discovered the real power of "provides")

I finally adopted an orphan scotch and submitted the tarball. However, I
hesitate to flag the fragmented *scotch* out-of-date / file deletion
requests against them, as there might be good reasons for their
fragmentation/obsolescence which i'm not aware of... I don't want to ruin
anyone's workflow. That's why i wanted to first have this discussion with
the packagers/maintainers.


On Sat, Feb 14, 2015 at 7:51 PM, Gordian Edenhofer <
gordian.edenhofer at gmail.com> wrote:

> Dear George Eleftheriou,
>
> as far as I understand your request, it could be solved a lot easier:
> First of all make use of the "provides" and "conflicts" variabel in your
> PKGBUILD (
> https://wiki.archlinux.org/index.php/PKGBUILD#Package_relation_variables).
> Therefore there is no need to alter the already excisting and working
> PKGBUILDs of mumps and openfoam.
> Furthermore you can flag the other packages as out-of-date or even file a
> deletion request.
>
> Best regards,
> Gordian Edenhofer
>
> On Sat, Feb 14, 2015 at 6:53 PM, George Eleftheriou <eleftg at gmail.com>
> wrote:
>
> > ===================================
> > to: mickele, myles, jedbrown as packagers/maintainers of the various AUR
> > scotch flavours
> >
> > cc: winstonwu9, gucong, kragacles, john_schaf, SMucalo as packagers /
> > maintainers of various other packages depending on these AUR *scotch*
> > ===================================
> >
> > The other day, i needed to build ptscotch-openmpi and realized that it
> > conflicts with scotch_esmumps5...
> >
> > loading packages...
> > resolving dependencies...
> > looking for conflicting packages...
> > :: ptscotch-openmpi and scotch_esmumps5 are in conflict. Remove
> > scotch_esmumps5? [y/N] y
> > error: failed to prepare transaction (could not satisfy dependencies)
> > :: mumps: requires scotch_esmumps5
> >
> > ... but i couldn't remove scotch_esmumps5 since i have mumps installed on
> > my system so... i did a quick search:
> >
> >
> >
> https://aur.archlinux.org/packages/?O=0&C=0&SeB=n&K=scotch&outdated=&SB=n&SO=a&PP=50
> >
> > and realized that there are 5 (!) different versions of *scotch* in AUR.
> > Then, i decided to do something about it.
> >
> > 1) Visited the upstream scotch website where i came across this
> interesting
> > piece of information (copying from the Release Notes and Changelog of
> > upstream 6.0.1):
> >
> > "While this is technically a bugfix release, much has changed "under the
> > hood" regarding repartitioning and (re)partitioning with fixed vertices.
> > From now on, there is no separate "*_esmumps" version. The additional
> > libraries for MUMPS can be generated by running "make esmumps" for the
> > sequential libraries and "make ptesmumps" for the parallel libraries."
> >
> > 2) Took bits and pieces from the already existing PKGBUILDs, cleaned them
> > up and made my own scotch PKGBUILD which grabs the latest sources (6.0.3)
> > and encompasses all kinds of scotch that could ever be needed by AUR
> > packages (serial + pt + esmumps + ptesmumps).
> >
> > 3) Uninstalled the scotch version I already had (scotch_esmumps5).
> >
> > 4) Installed my new "unified" scotch.
> >
> > 5) Built 2 AUR packages (openfoam and mumps) which depend on conflicting
> > scotch versions by replacing the [pt]scotch[-openmpi][_esmumps5]
> dependency
> > in their PKGBUILD with my new "unified" scotch. Just to test whether they
> > compile or they give errors. Everything worked.
> >
> > Suggestions/questions to all:
> >
> > 1) Would you mind checking my PKGBUILD (first attempt to make one but
> there
> > is nothing quite new inside anyway... it's based on the existing ones)
> for
> > errors? Any improvements to propose?
> >
> > 2) Then, if everything is OK, do you agree in merging all AUR *scotch*
> into
> > a single one in order to make life simpler?
> >
> > 3) the above also implies that the packages depending on *scotch*  will
> > have to change their dependencies' listings... I already attached the
> > modified PKGBUILDS of openfoam and mumps, as samples.
> >
>