Support newer GRASS version (modules directories)

[cgsbob]

When I compile QGIS I get this error:

CMake Error at src/plugins/grass/CMakeLists.txt:2 (SUBDIRS):
   subdirs Incorrect SUBDIRS command.  Directory: modules-6.5 does not exists.

With a little research, I notice that the grass plugin module directory has been reorganized. I see that the changes make at ​http://trac.osgeo.org/qgis/changeset?new=trunk%2Fqgis%2Fsrc%2Fplugins%2Fgrass%2FCMakeLists.txt%4010908&old=trunk%2Fqgis%2Fsrc%2Fplugins%2Fgrass%2FCMakeLists.txt%4010893 is not compatible with grass svn.

As a temporarily fixed, I did this:

ln -s /home/bobm/src/gis/qgis_svn/build/modules-6.4 /home/bobm/src/gis/qgis_svn/build/modules-6.5

I'm guessing that there are differences between the modules in GRASS 6.4 vs GRASS svn, so this is not an optimal solution.

[rugginoso]

Could you list me the modules that don't work with grass-6.5 (and maybe 7.0) so I will create the right directories with right module definitions in them?

[cgsbob]

I've cc'd grass-dev@… since there might be some interest in this bug.

[msieczka]

Still the case as of HEAD r12852:

CMake Error at src/plugins/grass/CMakeLists.txt:8 (MESSAGE):
  Your GRASS version is not supported
  (/home/zxc/src/straight/qgis-trunk/src/plugins/grass/modules-6.5 is not
  found).


CMake Error at src/plugins/grass/CMakeLists.txt:11 (MESSAGE):
  Your GRASS version is not supported
  (/home/zxc/src/straight/qgis-trunk/src/plugins/grass/modules-6.5 is not a
  Directory).


CMake Error at src/plugins/grass/CMakeLists.txt:14 (SUBDIRS):
  subdirs Incorrect SUBDIRS command.  Directory: modules-6.5 does not exists.

Symlink works for the compilation.

[rblazek]

Because current modules-x.x system requires duplication of data and in general is not very flexible, I would suggest to replace it with additional attributes in qgm config files for min/max version of GRASS an option is valid for, for example:

<option key="map" until="6.0">
<option key="vectormap" since="6.1" until="6.3">
<option key="vector" since="6.4">

Similarly for whole modules.

[neteler]

In my opinion the support for GRASS 6.3 can be dropped.