[GRASS-dev] [bug #4983] (grass) r.blend: the output name check is to strict

[Glynn Clements]

Maciek Sieczka via RT wrote:

> Moreover, r.blend ignores --ovewrite flag:
> 
>    $ g.list rast | grep map1_blend
> 
>      map1_blend.b            map1_blend.g
>      map1_blend.r
> 
>    $ r.blend --o first=map1 second=map2 output=map1_blend
>      Raster map <map1_blend.r> already exists.
> 
> *I know* it *exists* - that's why I'm using --o switch; but it's ignored for
> some reason.

r.blend performs its own check for the output maps:

	for MAP in r g b ; do
	   g.findfile elem=cell file=${GIS_OPT_OUTPUT}.$MAP > /dev/null
	   if [ $? -eq 0 ] ; then
	      echo "Raster map <${GIS_OPT_OUTPUT}.$MAP> already exists." 1>&2
	      exit 1
	   fi
	done

I've committed fixes for both issues (checking the base name, ignoring
--overwrite).

-- 
Glynn Clements <glynn at gclements.plus.com>