[postgis-devel] Can we put back GEOS 3.5 support in 3.0?

[Paul Ramsey]

I am more and more sympathetic to Regina’s use of version dropping as the whip hand to push distribution versions forward...

> On Jan 23, 2019, at 2:29 PM, Darafei Komяpa Praliaskouski <me at komzpa.net> wrote:
> 
> Counterexample: https://apt.postgresql.org/pub/repos/apt/dists/xenial-pgdg/main/binary-amd64/ <https://apt.postgresql.org/pub/repos/apt/dists/xenial-pgdg/main/binary-amd64/> ships PostGIS 2.5.1 (which is latest released) and does not ship any GEOS, relying on xenial-provided GEOS 3.5.0, released back in 2015. 
> 
> On Wed, Jan 23, 2019 at 10:02 PM Paul Ramsey <pramsey at cleverelephant.ca <mailto:pramsey at cleverelephant.ca>> wrote:
> The PGDG packagers are pretty good now about pushing forward to more recent GEOS. I’m not sure who would package a super-fresh PostGIS for LTS and then not bother to package an equivalent GEOS… ?
> Might be trying to fix a condition that rarely occurs.
> P.
> 
> > On Jan 23, 2019, at 6:35 AM, Raúl Marín Rodríguez <rmrodriguez at carto.com <mailto:rmrodriguez at carto.com>> wrote:
> > 
> > Hi,
> > 
> >> I had taken it out with the
> >> assumption we'd skip PostgreSQL 12 cycle and do a 2 year run.
> > 
> > I've always thought that plan was to match 3.0 with 12, if possible.
> > 
> > I have mixed feelings about this. GEOS 3.5 is still receiving commits (last
> > one in Oct 20, 2018) but, on the other hand, its last release (3.5.1) was in
> > Oct 2016 which will be 3 years old by the time we plan to release 3.0.
> > Considering that I expect Postgis 3.0 to be supported for at least ~4 years,
> > that will mean that we'll need to support an 8 year-old GEOS with its bugs
> > and differences from 3.7.
> > 
> > I'm personally happy to kill GEOS 3.5 support but I can accept that it will be
> > a pain in the ass for anyone using a LTS distribution. Nevertheless, those
> > distributions are already stuck with old GEOS and Postgis. For example Xenial
> > (Ubuntu 16.04) has GEOS 3.5 and Postgis 2.2, and Bionic (18.04) has GEOS 3.6
> > and Postgis 2.4.
> > This means that if you want Postgis 3 and you are using a LTS distro, you
> > already need to either use some unofficial repo or package postgis yourself.
> > I don't think that asking to also package a newer GEOS is too much to ask.
> > 
> > I share with Komяpa the feeling that we should push people to also update GEOS
> > as part of their Postgis update, but personally I might more comfortable telling
> > people that I'm not going to workaround a bug that isn't present in newer
> > (major) release, alas that isn't trully supporting 3.5.
> > 
> > So basically I don't have a strong opinion either way, but I'm more inclined
> > towards dropping it.
> > 
> > -- 
> > Raúl Marín Rodríguez
> > carto.com <http://carto.com/>
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> -- 
> Darafei Praliaskouski
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