[Qgis-user] [Qgis-developer] Any working GRASS in QGIS available? - Processing Bug?

Wed Aug 12 15:47:19 PDT 2015

Sure thing.  Open the .qgis2/python/plugins/processing/algs/grass7/ folder
and open the Grass7Algorithm.py file in a text editor. You can see the
changes that you'll need to make on GitHub:

https://github.com/qgis/QGIS/commit/2a14ffd281d0a0e99a0a899622a29ca0efdb0852

It is just a couple small changes.  I suppose alternately you could just
download the Grass7Algorithm.py file from GitHub and replace the one in the
above mentioned folder.

Andrew

On Tue, Aug 11, 2015 at 12:29 PM, Bernd Vogelgesang <
bernd.vogelgesang at gmx.de> wrote:

> Hi Andrew
>
>
> Am 06.08.2015, 19:20 Uhr, schrieb Andrew <amcaninch at gmail.com>:
>
> Victor,
>
> I edited the version of the processing plugin that i have installed (QGIS
> 2.8.3, processing 2.10.1) with the changes you made and now GRASS7 tools
> work as they should, thanks!
>
> Andrew
>
>
> Could you maybe describe a little bit what you have changed and how ?
>
> Bernd
>
>
>
> On Thu, Aug 6, 2015 at 5:59 AM, Victor Olaya <volayaf at gmail.com> wrote:
>
>> A quick (but very relevant) note about GRASS7:
>>
>> It seems that, in one of the latest changes, I unintentionally left
>> out a code line where GRASS was actually being called. I was getting a
>> bit crazy wondering where the error might be and why GRASS7 was not
>> working in the latest release....and finally found out that the reason
>> was that. So, in short, Processing was not running grass when running
>> a grass7 algorithm.
>>
>> I have added that line back and it should be fine now.
>>
>> If you can install the current master version, please test and let me
>> know if there are any issues or it is working correctly as before.
>>
>> Regards
>>
>>
>>
>> 2015-08-03 1:37 GMT+02:00 Bernd Vogelgesang <bernd.vogelgesang at gmx.de>:
>> > Hi Alex
>> >
>> > Am 03.08.2015, 01:20 Uhr, schrieb Alex Mandel <
>> tech_dev at wildintellect.com>:
>> >
>> >> Ah but we're closer to finding a solution with all those details. It
>> may
>> >> be fixable in Processing, which can be pushed to the plugin repo for
>> >> update any time.
>> >>
>> >> Passing this along to devs who might have enough information now.
>> >>
>> >> Thanks,
>> >> Alex
>> >
>> >
>> >
>> > Thanks for taking care,
>> >
>> > by the way: by copying the gdal algorithms from processing 2.10.1 to the
>> > 2.9.3 folder (.qgis2/python/plugins/processing/algs/gdal), I gained
>> access
>> > to the new GDAL dissolve polygons :)
>> >
>> > Unfortunately, the model from before (GRASS6) didn't work anymore, and
>> all
>> > attempts to adjust it via diff of a test model failed. So reworking my
>> model
>> > (for the 10th time or so) in Ubuntu 2.8.3 from ubuntugis-ltr with
>> working
>> > GRASS7, SAGA and everything and a partially upgraded Processing 2.9.3
>> >
>> > I'm on my way ... finally .. hopefully ...
>> >
>> > Bernd
>> >
>> >
>> >
>> >> On 08/02/2015 03:07 PM, Bernd Vogelgesang wrote:
>> >>>
>> >>> Am 02.08.2015, 22:44 Uhr, schrieb Alex Mandel
>> >>> <tech_dev at wildintellect.com>:
>> >>>
>> >>>> After some brief testing, my OSGeoLive 8.5 VM with QGIS 2.6 and
>> >>>> Processing 2.9.3, GRASS 7 works.
>> >>>>
>> >>>> My QGIS 2.8, GRASS 6/7, Processing 2.10.1 does not.
>> >>>
>> >>>
>> >>> Gave Windows another try: Removed everything, and installed the simple
>> >>> install OSGEO4W setup.
>> >>> QGIS 2.10.1 with Processing 2.10.1 and GRASS 6 working.
>> >>>
>> >>> switched back to Ubuntu, cause of a bug in the modeler version of GDAL
>> >>> Dissolve Polygons (which is crucial for me).
>> >>> https://hub.qgis.org/issues/13174
>> >>>
>> >>> Ubuntu: Now that I installed 2.8 with the debian repository only (so
>> >>> without ubuntis depencies), my GRASS 6 works (sorted out another
>> error,
>> >>> that GRASS takes a column name "OR" from shape as an sql-command or
>> >>> sth), update to Processing 2.10.1 worked as well.
>> >>>
>> >>> The drawback, no SAGA, which might come handy cause the now available
>> >>> algos do not really do what I expect ;)
>> >>>
>> >>> I think the problem is within Processing in combination with the
>> >>> packaging:
>> >>> When e.g. I install QGIS 2.8 with ubuntugis-ltr dependencies (where
>> >>> nobody on the install page claims I shouldn't do), GRASS7 and the
>> >>> modeler are working, but Processing version is 2.6. Updating
>> Processing
>> >>> to current Processing 2.10.1 (as recommended) seems to work.
>> >>> (Besides that v.clean in the modeler only returns a polygon layer from
>> >>> an polygon input, if I also set an output name for the error layer,
>> >>> otherwise I get an empty line shape)
>> >>>
>> >>> But: The next time I run QGIS and want to run an GRASS algo: Missing
>> >>> depencies
>> >>>
>> >>> I can now replace Processing 2.10.1 with the second latest 2.9.3 from
>> >>> https://plugins.qgis.org/plugins/processing/version/2.9.3/
>> >>> and there v.clean does what it should in Processing AND modeler.
>> >>>
>> >>> But: Now I do not have GDAL Dissolve polygons which is in Processing
>> >>> 2.10.1. Well, I could switch back to Windows QGIS 2.10, but, grr,
>> there
>> >>> is the bug in this algo ...
>> >>>
>> >>> You see, I'm trapped.
>> >>>
>> >>> Thanx for you attention
>> >>> Bernd
>> >>>
>> >>>
>> >>>
>> >>>>
>> >>>> Both are Ubuntu 14.04 based.
>> >>>>
>> >>>> I'm not sure if this is a bug in Processing, or in packaging. I
>> recall
>> >>>> in OSGeoLive 8.5 that we had custom packages with a patch. Note, you
>> can
>> >>>> get those versions for your Ubuntu system from
>> >>>> https://launchpad.net/~osgeolive/+archive/ubuntu/release-8.5
>> >>>>
>> >>>> We freeze a copy of the working versions in our own ppa for long term
>> >>>> history.
>> >>>>
>> >>>> Thanks,
>> >>>> Alex
>> >>>>
>> >>>>
>> >>>> On 2015-08-02 03:32, Bernd Vogelgesang wrote:
>> >>>>>
>> >>>>> Hi Alex,
>> >>>>>
>> >>>>> Am 02.08.2015, 01:22 Uhr, schrieb Alex Mandel
>> >>>>> <tech_dev at wildintellect.com>:
>> >>>>>
>> >>>>>> It's not a Windows/Ubuntu/Mac/OS thing, it's a QGIS + GRASS version
>> >>>>>> change thing.
>> >>>>>>
>> >>>>>> Please indicate which version of QGIS and GRASS you are trying to
>> get
>> >>>>>> working.
>> >>>>>
>> >>>>>
>> >>>>> Actually I do not mind any more what version I would like to get
>> >>>>> working. I would have preferred the 2.8-LTR branch with
>> no-matter-what
>> >>>>> GRASS version.
>> >>>>>
>> >>>>> I just would like to be able to finish my project, and there is
>> >>>>> unfortunately no alternative to the GRASS algos in my model.
>> >>>>>
>> >>>>>> QGIS 2.6 and older works with GRASS 6, 2.8+ sometimes is built to
>> work
>> >>>>>> with GRASS 7 (though possibly also with GRASS 6).
>> >>>>>
>> >>>>>
>> >>>>> Mhm, reverting to 2.6 ... Lets see if this still possible at all ...
>> >>>>>
>> >>>>>> If you want a guaranteed working setup ASAP download a copy of
>> OSGeo
>> >>>>>> Live Virtual Machine, we made sure that it works in that.
>> >>>>>> http://live.osgeo.org
>> >>>>>
>> >>>>>
>> >>>>> Will give it a try. Download will take another 1.5 hours ...
>> >>>>>
>> >>>>> So does that mean that even your do not have a working GRASS in a
>> >>>>> recent
>> >>>>> QGIS by "normal" means but the osgeo VM?
>> >>>>>
>> >>>>>
>> >>>>>>
>> >>>>>> Thanks,
>> >>>>>> Alex
>> >>>>>
>> >>>>>
>> >>>>> Cheers
>> >>>>> Bernd
>> >>>>>
>> >>>>>>
>> >>>>>> On 2015-08-01 14:41, Bernd Vogelgesang wrote:
>> >>>>>>>
>> >>>>>>> Hi guys,
>> >>>>>>> is it just bad karma, that I seem not to able to get a working
>> >>>>>>> GRASS in
>> >>>>>>> QGIS? Or did I miss the big advertisement "GRASS out of order"
>> >>>>>>> somewhere.
>> >>>>>>>
>> >>>>>>> For nearly 2 weeks, I tried to get things to work in Ubuntu/Mint,
>> and
>> >>>>>>> tried every possible/impossible repository, but always GRASS has
>> >>>>>>> missing
>> >>>>>>> dependencies, the forms open in Processing, but the algos don't
>> run
>> >>>>>>> through, or the functions are working in Processing, but failing
>> in
>> >>>>>>> the
>> >>>>>>> modeller.
>> >>>>>>>
>> >>>>>>> As I really got to finish a model in the Modeller including some
>> >>>>>>> GRASS
>> >>>>>>> algos, I finally turned on my VM with Windows ...
>> >>>>>>> but what the heck? Same s...t there!
>> >>>>>>>
>> >>>>>>> I really wonder why there aren't many post about trouble with
>> GRASS
>> >>>>>>> on
>> >>>>>>> this list or at stackexchange, normally this would explode when
>> >>>>>>> things
>> >>>>>>> like these happen.
>> >>>>>>>
>> >>>>>>> So am I really the one with the bad karma, do you all other simply
>> >>>>>>> not
>> >>>>>>> use GRASS in processing as much as I do, or do you all simply have
>> >>>>>>> working installs, so there is not problem?
>> >>>>>>>
>> >>>>>>> Please, at least one: Do you have an install under Ubuntu or
>> Windows,
>> >>>>>>> where GRASS algos are functional in the Modeler ? If yes, which
>> >>>>>>> version/what did you do?
>> >>>>>>>
>> >>>>>>> ... Soon, I will go and find me a rope ...
>> >>>>>>>
>> >>>>>>> Bernd
>> >>>>>>>
>> >>>>>>>
>> >>>>>>>
>> >>>>>>
>> >>>>>
>> >>>>>
>> >>>>
>> >>>
>> >>>
>> >>
>> >> _______________________________________________
>> >> Qgis-developer mailing list
>> >> Qgis-developer at lists.osgeo.org
>> >> http://lists.osgeo.org/mailman/listinfo/qgis-developer
>> >
>> >
>> >
>> > --
>> > Bernd Vogelgesang
>> > Siedlerstraße 2
>> > 91083 Baiersdorf/Igelsdorf
>> > Tel: 09133-825374
>> > _______________________________________________
>> > Qgis-developer mailing list
>> > Qgis-developer at lists.osgeo.org
>> > http://lists.osgeo.org/mailman/listinfo/qgis-developer
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>
>
>
>
>
> --
> Bernd Vogelgesang
> Siedlerstraße 2
> 91083 Baiersdorf/Igelsdorf
> Tel: 09133-825374
>
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