[Ubuntu] Plan for QGIS and GRASS versions, etc...

[Alex Mandel]

Recent discussions/breaks in the QGIS/GRASS interactions via the QGIS
GRASS Plugin and QGIS Processing toolbox got me thinking we should
probably clarify the plan/policy for where to put various versions.


Seems based on our old  ppa naming:
Stable should get QGIS 2.8.x LTR updates
and GRASS 6.x

Unstable should get QGIS 2.10+, GRASS 7+ (QGIS GRASS Plugin known to not
work until at least QGIS 2.12)


Of course this assumes people use stable/unstable in the manner we
suggest. I actually don't know anyone who actually uses stable, since it
mostly seems to have much older stuff.

This also seems relevant to Mapserver, where 6.x  would move to stable
and 7.x could go in unstable. And GDAL 2 vs GDAL 1.x


A side variation I've heard  suggested is that we alias package names
and files so that a transition allows both versions to be installed
(would be awesome for postgis migrations). But I think that adds too
much complication on the Debian side.

Any other suggestions or ideas on how to handle this so end users  end
up with working versions. Current unstable leaves QGIS Processing
toolbox not working with any GRASS for some reason. Claims it can't find
GRASS (though GRASS launches fine directly).

Thanks,
Alex