[Qgis-developer] Conflits between owsLib packages in OSGeo4w and QGIS

[Matthias Kuhn]

Hi Tom,

On 07/25/2015 02:17 PM, Tom Kralidis wrote:
> Hi: thanks for the info.  I believe this has been discussed in the
> past w.r.t. dependency management of Python plugins in QGIS, but there
> is no definitive approach yet.  For OWSLib we currently have this
> tracked via http://hub.qgis.org/issues/13058.
>
> The OSGeo4W OWSLib is not maintained / up to date AFAIK.
>
> Currently in master we can OWSLib and it's dependencies in
> https://github.com/qgis/QGIS/tree/master/python/ext-libs, which is not
> ideal IMHO.
>
> Not sure how to proceed here.  The best thing would be to remove all
> OWSLib dependencies from the codebase and install during time of
> building QGIS (pip/easy_install?), no matter what the platform, but
> I'm not aware of the entire picture/build/package/release story.
>
> Any suggestions on how best to handle this would be appreciated.

Is it required as a buildtime dependency?

Assuming it is a runtime dependency

 * We can make sure it's installed by default with OSGeo4W
 * Add it as dependency to the proper linux package
 * You can check when you import it in your plugin
   and offer the user an information if he's missing
   a dependency but that should only happen in rare cases.

Currently there is no mechanism to auto-install packages from QGIS
(easy_install / pip) and having a proper solution that works
cross-platform will be a bigger undertaking.
And I don't think installing it build time will help because the build
machine is not necessarily the one which will later run the app.

What do you think?

.. Matthias

>
> ..Tom
>
> On Fri, Jul 24, 2015 at 7:05 AM, Alexandre Neto <senhor.neto at gmail.com> wrote:
>> Hello Paolo,
>>
>> Em sex, 24 de jul de 2015 às 11:38, Paolo Cavallini <cavallini at faunalia.it>
>> escreveu:
>>>
>>> Hi Alexandre,
>>> this is a known issue: the internal lib should be removed, and the
>>> shared one used instead. The main dev is aware of this, probabkly he
>>> just need a hand.
>>
>> Yet, the standalone version also needs to pack the library. And the linux
>> and mac packages also need to include the library.
>>
>>> Could you perhaps give a hand?
>>
>> I don't think I have enough skills to provide any valuable help in this
>> matter.
>>
>> Best regards,
>>
>> Alexandre
>>
>>> All the best, and thanks.
>>>
>>> --
>>> Paolo Cavallini - www.faunalia.eu
>>> QGIS & PostGIS courses: http://www.faunalia.eu/training.html
>>> _______________________________________________
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