[QGIS-Developer] using conda for development

[Ari Meyer]

Matthias, WADR, your statement seems, at least on the surface, to indicate
an incredibly fragile process.  How can you possibly maintain stability and
reproducibility if the dependencies can be changed at will?

On Fri, Jul 31, 2020 at 2:27 AM Matthias Kuhn <matthias at opengis.ch> wrote:

> One thing to keep in mind is that even the main qgis
> installers/distributions do not have fixed dependency versions. Using
> downloaded macOS QGIS will have different dependencies than Windows and so
> will all the linux/*nix flavors.
>
> On 7/31/20 7:14 AM, Ari Meyer wrote:
>
> @Nyall, that proposal appears to be specific to plugins -- not sure if
> that's the best place to discuss this issue.
> @Greg: I found that many of the exact dependencies were not even available
> through the main channels.  So if the QGIS devs compile/build against such
> versions, I'm not sure there's an easy way to even specify such a conda
> recipe, unless all those dependencies are also made available somehow.  I
> didn't expect that those versions would not even be there with the others
> for the various libraries.  Could this imply that the library developers
> don't want those versions to be used?  Not sure.
>
> As a user and developer, I just want to be sure that if I pull down
> conda-forge qgis version X that I will get the same effective distribution
> as contained in downloadable installer version X.  Right now, we are
> getting a very different set of dependencies.
>
> Thanks,
> Ari
>
> On Thu, Jul 30, 2020 at 6:44 PM Greg Troxel <gdt at lexort.com> wrote:
>
>> Nyall Dawson <nyall.dawson at gmail.com> writes:
>>
>> > There's a related proposal at
>> > https://github.com/qgis/QGIS-Enhancement-Proposals/issues/179 --
>> > probably best to keep the discussion on that page.
>>
>> Not really about the details of using conda but about the concept:
>>
>>   conda's documentation says it runs on "Windows, macOS and Linux" but
>>   qgis also runs on at least NetBSD and almost certainly other BSDs.
>>
>>   it seems that to build something, including qgis the requirement is
>>   that the things it depends on are present in some way that is found by
>>   the build.  People can choose to do that however they want, and it
>>   seems funny to me to impose a requirement.   If this is really "let's
>>   publish a conda config file so that people who want to do that can do
>>   less work", that's of course fine, but if it's more "if you don't have
>>   conda then you can't build qgis", that's something else.
>>
>
> _______________________________________________
> QGIS-Developer mailing listQGIS-Developer at lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/qgis-developer/attachments/20200801/1bd3fe85/attachment.html>