qgis_session_info reports the version of QGIS and
installed third-party providers (so far GRASS 6, GRASS 7, and SAGA).
Additionally, it figures out with which SAGA versions the QGIS installation
Environment settings containing all the paths to run the QGIS
API. For more information, refer to
The function returns a list with following elements:
qgis_version: Name and version of QGIS used by RQGIS.
grass6: GRASS 6 version number, if installed to use with QGIS.
grass7: GRASS 7 version number, if installed to use with QGIS.
saga: The installed SAGA version used by QGIS.
supported_saga_versions: character vector representing the SAGA versions supported by the QGIS installation.
Jannes Muenchow, Victor Olaya, QGIS core team
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## Not run: qgis_session_info() ## End(Not run)
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