G.extension on Window does not work

ecodiv · October 12, 2026, 11:31am

g.extension in grass 8.5 on Windows does not point to the right server. It points to https://wingrass.fsv.cvut.cz/grass85/addons/grass-8.5.0/ which does not exist. What does exist is grass-8.5./ en grass-8.5.0dev/

I am starting a course so for me this is kind of urgent, any suggestions how to solve this?

tmszi · October 12, 2026, 7:40pm

Hello,

Quick fix:

You can try change installed g.extension module script code line locally (under OS MS Windows):

github.com/OSGeo/grass

scripts/g.extension/g.extension.py

69526e3d3


      
          base_url = (
              "http://wingrass.fsv.cvut.cz/"
              f"grass{VERSION[0]}{VERSION[1]}/addons/"
              f"grass-{VERSION[0]}.{VERSION[1]}.{VERSION[2]}"
          )

to

    # build base URL
    base_url = (
        "http://wingrass.fsv.cvut.cz/"
        f"grass{VERSION[0]}{VERSION[1]}/addons/"
        f"grass-{VERSION[0]}.{VERSION[1]}."
    )

Or addons URL will be fixed on the server side to https://wingrass.fsv.cvut.cz/grass85/addons/grass-8.5.0/

Win GRASS maintanace source code is available here.

It looks like this code line is problematic (especially %GVERSION% ENV value):

github.com/landam/wingrass-maintenance-scripts

grass_packager_release.bat

fffcd91fb


      
          C:\msys64\usr\bin\bash.exe .\grass_md5sum.sh %GVERSION%

          

          REM

          echo Building addons...

          REM

          C:\msys64\usr\bin\bash.exe .\grass_addons.sh %GVERSION%

          

          REM

          echo Publishing packages...

          REM

          C:\msys64\usr\bin\bash.exe .\grass_copy_scp.sh %GVERSION%

          

          exit /b %ERRORLEVEL%

          

          :cleanUp

                  if exist "C:\OSGeo4W\apps\grass\grass-%MAJOR%.%MINOR%.%PATCH%" rmdir /S/Q "C:\OSGeo4W%~1\apps\grass\grass-%MAJOR%.%MINOR%.%PATCH%"

          exit /b 0

          

          :cleanUpPkg

          	if exist .\grass%GVERSION% rmdir /S/Q .\grass%GVERSION%

          	xcopy C:\msys64\usr\src\grass%GVERSION%\mswindows\* .\grass%GVERSION% /S/V/I > NUL

Then the variable $VERSION:

github.com/landam/wingrass-maintenance-scripts

grass_copy_scp.sh

master


      
              fi
              ssh $HOST mkdir -p $TARGET_DIR/addons/grass-$VERSION/ < /dev/null 
              scp -r $SOURCE_DIR/addons/*.zip $SOURCE_DIR/addons/*.md5sum $SOURCE_DIR/addons/logs/ $HOST:$TARGET_DIR/addons/grass-$VERSION/
          }
          
          function copy_release {
              # release
              HOST=martinl@grass.osgeo.org
              SOURCE_DIR=${HOME}/grass$1
              GVERSION=${1:0:1}${1:1:1}
              VERSION=${1:0:1}.${1:1:1}.${1:2:4} # release
              PLATFORM=""
              
              if [ ${1:0:1} == "7" ] ; then
          	PLATFORM=x86_64
          	TARGET_PATH=$TARGET_PATH/$PLATFORM
              fi
          
              TARGET_DIR=/var/www/code_and_data/grass$GVERSION/binary/mswindows/native/$PLATFORM
              scp $SOURCE_DIR/WinGRASS-* $HOST:
              # scp $SOURCE_DIR/grass-*.tar.bz2 $HOST:/osgeo/download/osgeo4w/v2/$PLATFORM/release/grass/

Copy destination dir is $HOST:$TARGET_DIR/addons/grass-$VERSION/:

github.com/landam/wingrass-maintenance-scripts

grass_copy_scp.sh

master


      
              # ssh $HOST ssh grass.lxd mkdir -p $TARGET_DIR
              ssh $HOST scp WinGRASS-* grass.lxd:$TARGET_DIR < /dev/null 
              ssh $HOST rm WinGRASS-* < /dev/null 
              if [[ "$VERSION" != *"RC"* ]]; then
          	ssh $HOST ssh grass.lxd rm -f /var/www/code_and_data/grass$GVERSION/binary/mswindows/native/WinGRASS-${VERSION}RC* < /dev/null 
              fi
              # addons
              HOST=landamar@wingrass
              TARGET_DIR=/var/www/wingrass/grass${1:0:1}${1:1:1}/$PLATFORM
              ssh $HOST mkdir -p $TARGET_DIR/addons/grass-$VERSION/ < /dev/null 
              scp -r $SOURCE_DIR/addons/*.zip $SOURCE_DIR/addons/*.md5sum $SOURCE_DIR/addons/logs/ $HOST:$TARGET_DIR/addons/grass-$VERSION/
              if [[ "$VERSION" != *"RC"* ]]; then
          	ssh $HOST rm -rf $TARGET_DIR/addons/grass-${VERSION}RC < /dev/null
              fi    
          }
          
          if test -z $1 ; then
              while read release; do
                  copy $release
              done < releases.csv
          else

Theoretically if global ENV %GVERSION% is 85, then $VERSION variable will be 8.5. which actual contains win addons server URL https://wingrass.fsv.cvut.cz/grass85/addons/grass-8.5./

echoix · October 13, 2026, 9:57am

But at that url on the server, it didn’t get rebuilt since may 2025, so it’s still an issue.

For compiled and non compiled addons, in CI we have an artifact uploaded with every addon. You should be able to do something with it