[QGIS-Developer] LTR management [was Re: Delaying 3.10.1?]

[Nyall Dawson]

On Wed, 27 Nov 2019 at 18:37, Jürgen E. Fischer <jef at norbit.de> wrote:
>
> Hi Andrea,
>
> On Wed, 27. Nov 2019 at 00:59:08 -0700, andreaerdna wrote:
> > What about the OSGeo4W installer? Now, installing qgis-ltr from OSGeo4W
> > installer will also install gdal-3.0.2-3 and proj-6.2.1-2.
>
> And those don't fix the issue for you?

I think the issues are deeper then the crashes/projection failures
fixed by the GDAL/proj cherry-picked commits.

The work I did a couple of months back allowing QGIS 3.4 to be built
with gdal 3 (https://github.com/qgis/QGIS/pull/30072) was really just
a very thin band-aid, designed as a worst case scenario to permit
mostly working build to proceed in the case that a distro ONLY has
gdal 3 available.

>From that pr conversation -- a retrospectively (very) naive comment I
made relating to this:

"The reality is that we won't always be able to dictate the library
versions for 3.4. We can for osgeo4w, because we (well, @jef-n)
controls that infrastructure, but there's many other platforms where
we have no say in this. Including a bunch of wild-west ecosystems
where people upgrade stuff just to see what other stuff they can
break.... (*cough* homebrew *cough*). We've still got at least 6
months left to support 3.4, so sooner or later we'll need to make it
usable on the newer libraries, even if that means a bunch of
short-term hacks and workarounds to make it work with this. The only
other option is dropping the LTR support early, but I don't think
that's possible/a good idea."

I've changed my mind since this comment, and now think we SHOULD drop
Windows LTR support early rather than releasing a 3.4 build based on
proj6/gdal3.

Nyall


>
> Jürgen
>
> --
> Jürgen E. Fischer           norBIT GmbH             Tel. +49-4931-918175-31
> Dipl.-Inf. (FH)             Rheinstraße 13          Fax. +49-4931-918175-50
> Software Engineer           D-26506 Norden            https://www.norbit.de
> QGIS release manager (PSC)  Germany                    IRC: jef on FreeNode
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