[GRASS-dev] changing %HOME% in winGRASS for a better R-winGRASS-integration - discussion

[Anna Petrášová]

On Fri, Nov 18, 2016 at 11:29 AM, Helmut Kudrnovsky <hellik at web.de> wrote:
> Anna Petrášová wrote
>> On Fri, Nov 18, 2016 at 9:14 AM, Helmut Kudrnovsky <
>
>> hellik@
>
>> > wrote:
>>> hi devs,
>>>
>>> the subject question oroginates from
>>>
>>> [GRASS-stats] GRASS can't find R packages from personal library on
>>> Windows
>>> https://lists.osgeo.org/pipermail/grass-stats/2016-November/001690.html
>>>
>>> technical background on winGRASS side:
>>>
>>> %HOME% is defined in winGRASS by:
>>>
>>> for trunk
>>>
>>> https://trac.osgeo.org/grass/browser/grass/trunk/lib/init/grass.py#L712
>>>
>>> 712     def ensure_home():
>>> 713         """Set HOME if not set on MS Windows"""
>>> 714         if windows and not os.getenv('HOME'):
>>> 715             os.environ['HOME'] = os.path.join(os.getenv('HOMEDRIVE'),
>>> 716                                               os.getenv('HOMEPATH'))
>>>
>>> and for the 7.0.x-line
>>>
>>> https://trac.osgeo.org/grass/browser/grass/branches/releasebranch_7_0/lib/init/grass.py#L1338
>>>
>>> 1338    # set HOME
>>> 1339    if windows and not os.getenv('HOME'):
>>> 1340        os.environ['HOME'] = os.path.join(os.getenv('HOMEDRIVE'),
>>> 1341                                          os.getenv('HOMEPATH'))
>>>
>>> both definitions turn out to be (on the most newer windows boxes) the
>>> same
>>> as %USERPROFILE% (e.g C:\Users\yourusername).
>>>
>>> technical background on R side:
>>>
>>> if %HOME% is _unset_ on windows, R looks for private libraries in
>>> C:\Users\yourusername\Documents\R\win-library\3.3, etc)
>>>
>>> but if %HOME% is _set_ on windows, R looks for private libraries on the
>>> wrong place (C:\Users\yourusername\R\win-library\3.3, etc.) <= see the
>>> missing _Documents_ as opposite to above search path for private
>>> libraries;
>>>
>>> thus R can't expand its search path to private libraries, as these are
>>> installed by default in
>>> C:\Users\yourusername\Documents\R\win-library\3.3,
>>> etc.
>>>
>>> some ways to overcome this R-winGRASS-integration issue:
>>>
>>> (1) add some notes in the GRASS-wiki to add manually R_LIBS_USER (=path
>>> to
>>> private library in R) via the windows control panel permanently or
>>> temporary
>>> in the winGRASS-command console by e.g. set
>>> R_LIBS_USER=path/to/your/private/
>>>
>>> (2) add some notes in the GRASS-wiki how to add R_LIBS_USER in a R
>>> session.
>>>
>>> (3) add some logic in the windows-winGRASS-bat-start up scripts to add
>>> R_LIBS_USER
>>
>> Can we define R_LIBS_USER in R.bat?
>> https://trac.osgeo.org/grass/browser/grass/trunk/mswindows/external/rbatch/R.bat
>
> R_LIBS_USER has to be set explicitely for a defined path to a private
> library of a defined version and so on; the question is what to set.
>
> better is to let R decide where to search for default.
>
>
> Anna Petrášová wrote
>>>
>>> (4) add some logic in the (win)GRASS-startup-GUI to define R_LIBS_USER
>>>
>>> (5) or see [1] to set %HOME% in windows to %USERPROFILE/Documents instead
>>> of
>>> %USERPROFILE%
>>>
>>> add following line
>>> SET HOME=%USERPROFILE%\Documents
>>> below
>>> https://trac.osgeo.org/grass/browser/grass/trunk/mswindows/env.bat#L23
>>>
>>> to catch the most common R private library installations.
>>>
>>> I couldn't find any hints in the source where %HOME% is used in winGRASS
>>> modules/scripts.
>>
>> what happens if we don't set it in grass.py? I can't try now.
>
> tested in winGRASS7.0.5 by commenting out following line:
>
> # set HOME
> #if windows and not os.getenv('HOME'):
> #    os.environ['HOME'] = os.path.join(os.getenv('HOMEDRIVE'),
> #                                        os.getenv('HOMEPATH'))
>
> in C:\Program Files\GRASS GIS 7.0.5\etc\grass70.py
>
> the wxGUI starts, displaying raster and vector works, tested some modules,
> all worked.
>
> but no idea if there may be some more side effect; further no idea if there
> is probably more to do for the OSGeo4W-version.
>
> anyone more insight, if %HOME% is needed in winGRASS?

Done by Glynn in:
https://trac.osgeo.org/grass/changeset/37873



>
>
>
> -----
> best regards
> Helmut
> --
> View this message in context: http://osgeo-org.1560.x6.nabble.com/changing-HOME-in-winGRASS-for-a-better-R-winGRASS-integration-discussion-tp5296480p5296507.html
> Sent from the Grass - Dev mailing list archive at Nabble.com.
> _______________________________________________
> grass-dev mailing list
> grass-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/grass-dev