[GRASS-dev] correction r.mapcalc help file

[Paulo van Breugel]

On February 23, 2017 18:20:18 Moritz Lennert <mlennert at club.worldonline.be> 
wrote:

> On 23/02/17 15:33, Paulo van Breugel wrote:
>> Dear devs,
>>
>> In the help file of r.mapcalc it is written:
>>
>>> When the user enters input to /r.mapcalc/ non-interactively on the
>>> command line, the program will not warn the user not to overwrite
>>> existing map layers. Users should therefore take care to assign
>>> program outputs raster map names that do not yet exist in their
>>> current mapsets.
>>
>> Perhaps the description is somewhat ambiguous, but if the way I read
>> this is correct, this is not the default behaviour. Perhaps the
>> following describes it better:
>>
>>> By default it is not possible to overwrite existing raster layers, so
>>> the user is expected to take care to assign program output raster
>>> names that do not yet exist in their current mapset. If they want to
>>> overwrite existing maps, users can use the --overwrite flag.
>>
>> I added a patch file in case the above is ok.
>
> This is a leftover from history. Old r.mapcalc did not use the parser in
> the same way and did not check whether the output file existed and just
> overwrote it. Since GRASS 7 this has changed.

Yes, and a very good change it was
>
> However, I would suggest to just completely erase the part you want to
> replace. I don't think there is a need for your replacement. Otherwise
> we would have to add such a sentence to the manual of each module that
> creates output...

Yes, think you are right, just remove the section


>
> Moritz