[QGIS-Developer] Is the apps\qgis folder cleared before installing a new QGIS version in osgeo4w?

[Jürgen E. Fischer]

Hi Nyall,

On Wed, 28. Feb 2018 at 09:17:43 +1000, Nyall Dawson wrote:
> Hi all, (but specifically Jürgen!)
> 
> I'm wondering if the existing content of the apps\qgis folder is
> removed before a new QGIS version is install via osgeo4w?

The files installed by the previous package are removed and the
package preremove script is run.
 
> This report leads me to believe I'm not seeing an isolated issue:
> https://gis.stackexchange.com/questions/272679/gdaltools-core-plugin-missing-metadata-file/272682#272682
 
> Does osgeo4w have support for preinstall scripts which we could use to
> wipe the python/plugins folder prior to an install?

postinstall,  see ms-windows/osgeo4w/postinstall-desktop.bat, which removes old
pyc.


Jürgen

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