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Bug#989597: release.debian.org: upgrade issue: non-coinstallability of libgdal20 and libgdal28



On 2021-06-18 17:42:44 +0200, Sebastiaan Couwenberg wrote:
> On 6/18/21 5:19 PM, Andreas Beckmann wrote:
> > On 18/06/2021 09.50, Sebastiaan Couwenberg wrote:
> >> I'm increasingly in favor of removing the Breaks from gdal-data, the
> >> attached procedure works for me in buster chroot.
> > 
> >> There is much less need for gdal-data breaking libgdal20 for us than
> >> there is in the UbuntuGIS PPA use case. I'm not aware of any packages
> >> that use gdal in the maintainer scripts that would be using the old gdal
> >> on their removal. So there shouldn't be any actual expected breakage.
> > 
> > Do you have some ideas what could break by installing gdal-data 3.x in
> > buster?
> 
> qgis crssync is a likely candidate, prior to PROJ 6 it relied more more
> heavily on the projection data included in gdal.
> 
> Other than that I don't know. You'd have to grep through the sources to
> find the functions using those files, and then search through reverse
> dependencies for use of those functions.
> 
> > I.e. on a partial upgrade. (Could someone run autopkgtests in
> > buster with the proposed gdal-data?)
> 
> Many of the gdal rdeps don't have autopkgtests, and the most prominents
> ones don't.
> 
> >> This change is minimal, doesn't require NEW packages, nor introduces
> >> divergence from upstream (as when the files would be moved to
> >> u/s/gdal/<X.Y> in libgdal28), hence it's my preferred solution.
> > 
> > That's a bad upstream decision, but as you described them, they don't
> > care about upgrade paths :-(
> 
> PostGIS upstream are the ones who don't particular care about
> distribution upgrades. GDAL upstream is actually quite good (and
> responsible for the bulk of the work that went into PROJ 6).
> 
> >> If there is no objection, I'll upload gdal (3.2.2+dfsg-2) with the
> >> changes from the debdiff to unstable.
> > 
> > Sounds fine to me.
> 
> If the RMs are onboard as well, then let's not waste any more time on
> alternatives.

It's a step in the right direction. So, yes, please go ahead.

Cheers

> 
> Kind Regards,
> 
> Bas
> 
> -- 
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> 

-- 
Sebastian Ramacher

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