[GRASS-user] Detecting GRASS version when only specifying GRASS directory

Rainer_M_Krug · September 12, 2011, 12:04pm

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Hi

I am using GRASS from within an R script, and would need the GRASS
version. I do not know the startup script, so grass --version is not
an option. Nevertheless, I have obviously specified the GRASS
directory where the grass executables and scripts sit. Is there one
which I can use to get the grass version?

Thanks,

Rainer

- --
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation
Biology, UCT), Dipl. Phys. (Germany)

Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa

Tel : +33 - (0)9 53 10 27 44
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email: Rainer@krugs.de

Skype: RMkrug
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Hamish · September 12, 2011, 10:48pm

Rainer wrote:

I am using GRASS from within an R script, and would need
the GRASS version. I do not know the startup script, so grass
--version is not an option. Nevertheless, I have obviously
specified the GRASS directory where the grass executables and
scripts sit. Is there one which I can use to get the grass
version?

If grass is started you can use the GRASS_VERSION enviro variable
or the g.version module to get it.

If GRASS is not started you can look in the
$GISBASE/etc/VERSIONNUMER file.

Hamish

Ahmadou_Dicko · September 13, 2011, 12:12am

The way Rainer use R for scripting GRASS don’t allow him to use the GRASS_VERSION variable, so i think the only way is to use the second solution proposed by Hamish.

something like that should do the trick in R

readLines(paste(Sys.getenv(“GISBASE”), “etc”, “VERSIONNUMBER”, sep = “/”))

But if you launch R from GRASS or set some GRASS variable permanently you can simply do

Sys.getenv(“GRASS_VERSION”)

2011/9/12 Hamish <hamish_b@yahoo.com>

Rainer wrote:

I am using GRASS from within an R script, and would need
the GRASS version. I do not know the startup script, so grass
–version is not an option. Nevertheless, I have obviously
specified the GRASS directory where the grass executables and
scripts sit. Is there one which I can use to get the grass
version?

If grass is started you can use the GRASS_VERSION enviro variable
or the g.version module to get it.

If GRASS is not started you can look in the
$GISBASE/etc/VERSIONNUMER file.

Hamish

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Rainer_M_Krug · September 13, 2011, 7:03am

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Hi Hamish, Ahmadou,

Hamish: The file VERSIONNUMBER is exactly what I was looking for - thanks.

Ahmadou:

On 13/09/11 02:12, ahmadou dicko wrote:

The way Rainer use R for scripting GRASS don't allow him to use
the GRASS_VERSION variable, so i think the only way is to use the
second solution proposed by Hamish.

Exactly.

something like that should do the trick in R

readLines(paste(Sys.getenv("GISBASE"), "etc", "VERSIONNUMBER", sep
= "/"))

Perfect.

But if you launch R from GRASS or set some GRASS variable
permanently you can simply do

Sys.getenv("GRASS_VERSION")

Terue - but as you pointed out, I am not running R from within GRASS,
so the file VERSIONNUMBER is the way to go.

Thanks a lot,