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 is a continuation of:
- #8db3dead87e385f2798356d
- #5c97d22b16320874dbe1
This commit only affects users that have multiple GRASS installations on
their Macs. Using the most recent GRASS version is what we do on Linux too.
Related to https://issues.qgis.org/issues/20632
This seems to solve this issue, but I don't really know if this change may be introducing some collateral effect.
It should be revised by someone with good knowledge of this piece of code.
And catch segmentation faults from GRASS commands and show a nice
helper text advising user that QGIS isn't at fault here ;)
Also add a tip to try disabling the v.external option if that setting
is enabled and a GRASS segfault occurs
* A new createopt textbox has been added to the parameters dialog for algorithms which exports to raster files.
* A new metaopt textbox has also been added to the Algorithm parameters dialog.
* Raster file format is detected from output filename extension.
* GdalUtils has been improved to correctly detect raster formats supported for creation.
* QFileDialog for output rasters now display only file filters for supported output raster file formats.
- Improve GRASS detection for all OS.
- Use GRASS --exec command.
- Unified GRASS batch job method for all OS (easier to maintain).
- Handle MS-Windows codepages (for data only, if you have a username with special characters, it will not work).
- Better support for filepath normalization.
- add -m option to r.out.gdal.
