On Thu, Jul 18, 2013 at 1:57 PM, Rainer M Krug <[email protected]> wrote: > Nikos Alexandris <[email protected]> writes: > >> Rainer MK wrote: >>> >> I am a bit irritated, ut maybe I don't dee the reasoning behind this:' >> >>> >> ,---- >>> >> | RASS 7.0.svn (grass):~ > g.copy rast=MASK,tmp >>> >> | WARNING: <tmp> already exists >>> >> | [Raster MASK present] >>> >> | GRASS 7.0.svn (grass):~ > >>> >> `---- >> >>> >> If the layer already exists, shouldn't the command give actually an >>> >> error and not only a warning? >> >>> >> A warning implies for me that the command worked, but maybe something >>> >> unexpected could have happened (or happened) - but this one clearly did >>> >> not work, as the layer has not been copied? >> >> Glynn Clements: >>> > In GRASS, errors are fatal; the program will be terminated as soon as >>> > the error message has been printed. >> >> Rainer MK: >>> Exactly - if e.g. in r.mapcalc an invalid expression is entered, >>> r.mapcalc issues the error message and quits. >> >>> > Each of g.copy's options accept an arbitray number of >>> > source+destination pairs, and the various options aren't mutually >>> > exclusive (e.g. a single invocation can copy both raster and vector >>> > maps). >> >>> True. >> >>> > If it can't perform a particular copy for any reason, it generates a >>> > warning then moves on to the next item. >> >>> True - but this does not answer my question. But I looked at cp in bash, >>> and it behaves in the same way. >>> So I think I have to live with this. >> >> Just sharing my thoughts about: Imagine copying 1000 maps. And one is meant >> to fail, say the 1st one of them. You wouldn't, probably, like the copy >> process to be interrupted just for one map that failed. Right? > > Depends: when using in a script, I would like it to fail, as the > following commands might give wrong resuls as they would be based on the > previous map and not the copied one. > > Also, in a script this could mean that previous commands did not clean > their temporary files properly - other cause for an interruption of the > script. > > When doing it from the command prompt, I would say: just tell me which > ones failed - correct. > > SO the best would be a flag which says "error on map exists".
The other way around: you can enforce copying (overwrite existing maps) with g.copy --o Markus M _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
