locations as the algorithm results, don't just echo back the parameter
value
Otherwise we don't return the correct value for temporary file locations
or for file paths during model execution
Fixes#36379
New features in GRASS 7.6: Add -n flag to create aspect as degrees clockwise from North (azimuth), with flat = -9999 (like gdaldem); new -e flag to compute values at edges (like gdaldem -compute_edges).
GRASS GIS, in addition to importing data in its native formats via
`r.in.gdal`/`v.in.ogr` (and likewise `r.import`/v.import`),
also supports `r.external`/`v.external` which only link the data into
the GRASS DB.
Nevertheless, both `r.external` and `v.external` occasionally have problems,
especially on windows. E.g.:
- https://trac.osgeo.org/grass/ticket/3927
GRASS 7 Processing Plugin already has a setting that controls whether
`v.external` is used (disabled by default).
With this commit the complementary setting for `r.external` gets added too.
Usage of `r.external` is disabled by default. This is changing the existing
behavior, which was to use r`r.external`. The downsides of this change
should be the somewhat lower import speed + higher disk usage. Nevertheless
this way we have the same default value as `v.external` + we circumvent the
`r.import/v.import` shortcomings.
This change makes it easier to subclass `Grass7AlgorithProvider` which
allows e.g. to expose GRASS Addons as QGIS plugins.
Disclaimer: `Grass7AlgorithProvider` is a private API and it may change
without warning. 3rd parties that rely on this should expect
that their code will break in future releases.
For more info please check the comments at #30252
Nevertheless, it currently is possible to subclass with something like this:
class CustomGrassBasedProvider(Grass7AlgorithmProvider):
# Set descriptionFolder to our own description directory
descriptionFolder = os.path.join(os.path.dirname(__file__), 'description')
# 3rd party plugins don't need an activation/deactivation setting
activateSetting = None
# define the rest of the methods that are needed (e.g. name(), id() etc)
# ...
Fixes#30241
Continues #9202
