[GRASS-dev] [GRASS GIS] #2333: choose python interpreter during the GRASS installation on windows

[GRASS GIS]

#2333: choose python interpreter during the GRASS installation on windows
--------------------------------------------------+-------------------------
 Reporter:  zarch                                 |       Owner:  grass-dev@…              
     Type:  enhancement                           |      Status:  new                      
 Priority:  normal                                |   Milestone:  7.1.0                    
Component:  Python                                |     Version:  svn-trunk                
 Keywords:  windows installer python interpreter  |    Platform:  MSWindows 8              
      Cpu:  All                                   |  
--------------------------------------------------+-------------------------

Comment(by hellik):

 Replying to [ticket:2333 zarch]:
 > Using the Windows installer would be great to be able to choice which
 python interpreter must be used by GRASS.
 >
 > Suppose that we have already installed a python interpreter like
 [https://code.google.com/p/pythonxy/ pythonxy], at the moment the GRASS
 installer use is own python interpreter therefore if I want to use any
 python packages from GRASS, like [http://www.scipy.org/ scipy] or
 [http://pandas.pydata.org/ pandas] I have, some how, to install these
 packages on the GRASS interpreter even if they are already present in
 pythonxy.
 >
 > Do you think that would be possible to add this point to the GRASS
 installer? or It is not possible to add this option because GRASS must be
 compiled using the new interpreter? where should I look to try to add this
 option?
 >
 > Any hints?

 a first step would be to change

 https://trac.osgeo.org/grass/browser/grass/trunk/mswindows/env.bat#L9

 {{{
 9       set GRASS_PYTHON=%GISBASE%\extrabin\python.exe
 }}}

 to point to your already installed other python and test if this works (no
 idea if any other changes e.g. in wxgui are needed).

 ''env.bat'' is AFAIR in a subfolder of ''C:\Program Files (x86)\GRASS GIS
 X.x''

 keep in mind, these other python should have compatible GRASS dependencies
 (e.g. numpy, wxpython, matplotlib,...).

 if the change in env.bat works, the next step would be to add an option
 which python to use to the nsis-script:

 https://trac.osgeo.org/grass/browser/grass/trunk/mswindows/GRASS-
 Installer.nsi.tmpl

-- 
Ticket URL: <https://trac.osgeo.org/grass/ticket/2333#comment:2>
GRASS GIS <http://grass.osgeo.org>