add graphviz to notebook docker image

[rabernat]

dask experts: what is the recommended way to install graphviz? (I know it has some complicated dependencies.)

I would like to be able to visualize dask graphs from pangeo.pydata.org.

xref: https://github.com/pangeo-data/pangeo/issues/74

[rabernat]

cc @martindurant as someone who might know something about this

[mrocklin]

apt install graphviz

then

pip install graphviz

You could also try

conda install python-graphviz

but I've been generally less happy with it over the years

On Mon, Jun 18, 2018 at 10:27 AM, Ryan Abernathey notifications@github.com wrote:

cc @martindurant https://github.com/martindurant as someone who might know something about this

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[ocefpaf]

conda install python-graphviz but I've been generally less happy with it over the years

I'm curious to know why and if there is anything we can do to fix that.

[mrocklin]

I don't know much about the conda-forge recipe. The defaults recipe has been broken on-and-off for years. I think the graphviz system library was only compiled to support a couple image formats or something. There was a long github issue on this topic at one point. I spent a couple minutes googling and couldn't find it though.

On Mon, Jun 18, 2018 at 11:25 AM, Filipe notifications@github.com wrote:

conda install python-graphviz but I've been generally less happy with it over the years

I'm curious to know why and if there is anything we can do to fix that.

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[martindurant]

I seem to recall that the conda package needed some PNG extras in order to be useful from dask's point of view. I definitely did this at some point and could probably find those requirements again.

[ocefpaf]

Thanks @martindurant and @mrocklin. I don't want to hijack this thread with an off-topic question so I'll be brief: if you can open issues at https://github.com/conda-forge/python-graphviz-feedstock or, even better, add a test that ensures the options you need are enabled, I can look into fixing these things.

[martindurant]

I have found that for linux, the following combination works libiconv graphviz python-graphviz pango

[rabernat]

@martindurant -- I'd be happy if you could add this via PR.

I would also like to add gsw to both worker and client images (https://anaconda.org/conda-forge/gsw), so if you bother to rebuild the docker images, it would be great to throw that in as well.

[rabernat]

Closed by #45