[Matplotlib-devel] SVG Tests on MacOS

[Rob McDonald]

I was able to dust off my Ubuntu VM and get the *.svg files built and added
to my PR.  So, the immediate need is satisfied.

Any pointers on how to accomplish the same on MacOS - or pointers to
appropriate docs that make this clear would still be appreciated.

Rob


On Sun, Jun 14, 2020 at 7:36 PM Rob McDonald <rob.a.mcdonald at gmail.com>
wrote:

> I've finally had some time to return to my feature contribution and pull
> request:
>
> https://github.com/matplotlib/matplotlib/pull/15458
>
> I've added the pytest *.png and *.pdf baseline images, but I can't figure
> out how to generate the *.svg ones on my machine (MacOS).  The CI test
> framework passes on MacOS - but not on Linux.  This gives me a clue that
> maybe the SVG creation only happens on Linux.
>
> There aren't any SVG related dependencies in the build instructions online
> (like for libpng).  There is one place where Inkscape <1.0 is listed as a
> requirement to generate SVG's -- I have Inkscape on my machine (1.0beta2),
> but I can't find any instructions to link it to MatPlotLib or to install an
> older version.  'brew install caskformula/caskformula/inkscape' bombs out
> complaining about 'inkscape: "cxx11" is not a recognized standard'.
>
> It would be really great if one of the automated builds made the
> matplotlib/result_images/* available as an artifact for download (if it
> does already, I can't find it).  Both to provide a source for files that
> can't be generated locally -- and, if something actually does fail, to
> provide the visual debugging aid to the developer.  As it is, if a test
> fails in the CI framework (say on a platform a developer doesn't have) --
> that does not fail on the dev's local machine -- what clues do they have to
> debug it?
>
> It may be that real development of matplotlib can only be done on Linux --
> but it would really help if the online docs were updated to make that
> clear.  I've spent half a day trying to get everything moved forward, set
> up, etc. for local development and testing -- only to come to the
> conclusion (I think) that it can't be done on a Mac.  As far as I can see,
> this isn't written down anywhere, but it seems to fit the situation.
>
> Thanks for any help,
>
> Rob
>
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