[GRASS-dev] GEM Wizard question

[Michael Barton]

I guess Jerry Nelson gave an example. The problem is testing from within
GRASS and the GUI. I don't know what value the C variable G_home() will
return in such cases.

Michael


On 5/23/07 6:45 AM, "William Kyngesburye" <woklist at kyngchaos.com> wrote:

> Is that from within GRASS, or other shell use?  Which platform?  If
> GRASS needs HOME as Hamish says, then it won't run without it (or not
> run right), so G_home() will always work.  Unless maybe the GRASS
> libraries are used outside of GRASS, like in Qgis or GDAL.
> 
> On May 23, 2007, at 1:43 AM, Michael Barton wrote:
> 
>> When I've tried to use home without checking for its existence
>> first, I've
>> had reports of errors back from some users who claim that they do
>> not have
>> HOME set to anything. So I always try to check to see if it is valid.
>> 
>> Michael
>> 
>> 
>> On 5/22/07 11:00 PM, "Hamish" <hamish_nospam at yahoo.com> wrote:
>> 
>>> William Kyngesburye wrote:
>>>> Note - there is a libgis function to get a user's home: G_home
>>>> ().  It
>>>> should work on all platforms (it has a mingw special case, but maybe
>>>> it doesn't work on the Win native build?).  It would be handy to
>>>> have
>>>> a command equivalent to use in scripts, like g.home.
>>> 
>>> Python/SWIG scripting:
>>>>>> homedir=python_grass6.G_home()
>>>>>> print homedir
>>> /home/hamish
>>> 
>>> 
>>> "~" is expanded by the shell AFAIK, so that requires a shell to
>>> expand.
>>> "$HOME" works for me, where doesn't it work Michael?*
>>> 
>>> 
>>> On ms windows there is %HOMEPATH% and %USERPROFILE%.
>>> No idea how they differ,
>>> 
>>> MS Windows Command shell overview:
>>> 
>>> http://www.microsoft.com/resources/documentation/windows/xp/all/
>>> proddocs/en-us
>>> /ntcmds_shelloverview.mspx?mfr=true
>>> 
>>> 
>>> [*] GRASS must know where home is, as that's where it looks
>>> for .grassrc6.
>>> 
>>> lib/init/init.bat does:
>>>   if "%HOME%"=="" set HOME=%USERPROFILE%
>>>   set WINGISRC=%HOME%\.grassrc6
>>> 
>>> lib/init/init.sh does:
>>>   GISRCRC="$HOME/.grassrc6"
>>> 
>>> 
>>> Hamish
>>> 
>>> 
>> 
>> __________________________________________
>> Michael Barton, Professor of Anthropology
>> School of Human Evolution & Social Change
>> Center for Social Dynamics & Complexity
>> Arizona State University
>> 
>> phone: 480-965-6213
>> fax: 480-965-7671
>> www: http://www.public.asu.edu/~cmbarton
>> 
>> 
> 
> -----
> William Kyngesburye <kyngchaos*at*kyngchaos*dot*com>
> http://www.kyngchaos.com/
> 
> Earth: "Mostly harmless"
> 
> - revised entry in the HitchHiker's Guide to the Galaxy
> 
> 

__________________________________________
Michael Barton, Professor of Anthropology
School of Human Evolution & Social Change
Center for Social Dynamics & Complexity
Arizona State University

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton