Fwd: [qgis/QGIS] Can't install `qgis-plugin-grass` in Ubuntu 20.04 (#38329)

Hi,

There seems to be some confusion with the Ubuntu packages, does anyone have
more insights?
And: do we need to change anything here:

https://grass.osgeo.org/download/software/linux/
?

Best
Markus

---------- Forwarded message ---------
From: F...
Date: Mon, Aug 17, 2020 at 8:26 PM
Subject: Re: [qgis/QGIS] Can't install `qgis-plugin-grass` in Ubuntu 20.04
(#38329)
To: qgis/QGIS <[email protected]>

Thanks for the hint. Note that your advice is not yet an option: Focal QGIS
packages are still absent from https://qgis.org/ubuntugis (contrary to
Bionic), while they are present only in https://qgis.org/ubuntu.

On the other hand the GRASS website's 'quick link' points to
<https://grass.osgeo.org/download/linux/> ppa:ubuntugis/ubuntugis-unstable
for installation of GRASS on Ubuntu (i.e. including Focal). There, it is at
7.8.3 (for Focal and older). In the Ubuntu Focal *universe* repository,
GRASS is at 7.8.2. Removing the PPA and re-installing GRASS from Ubuntu
Focal solved the problem.

IMHO it would be nice if GRASS would point at the requirement for GRASS to
be installed from a repository, compatible with the one holding
qgis-plugin-grass, if the latter is to be installed. In the case of Ubuntu
Focal this is not the ubuntugis-unstable PPA (yet). Suggestion @neteler
<https://github.com/neteler>

Actually not installing GRASS directly but only following the
recommendations at
https://qgis.org/en/site/forusers/alldownloads.html#debian-ubuntu to do sudo
apt install qgis qgis-plugin-grass would work and install the compatible
version of GRASS, provided that no conflicting repositories are activated
(cf. the recommendation: "Please remove all the QGIS and GRASS packages you
may have installed from other repositories before doing the update.").
However this would not yet install grass-doc and grass-gui, so to install
GRASS one still would be guided towards the PPA following the GRASS website.

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