[QGIS-Developer] using conda for development

[Ari Meyer]

@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.
>
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