errors loading image from `latex.codecogs.com/svg.latex`

[ctb]

I'm getting a lot of these on build/build.sh:

ERROR: Failed to load image at "https://latex.codecogs.com/svg.latex?%5Ctextstyle%20h%28x%29" (URLError: <urlopen error [Errno 61] Connection refused>)

it looks like it's coming from this command in build.sh,

pandoc --data-dir=build/pandoc --defaults=common.yaml --defaults=html.yaml --defaults=pdf-weasyprint.yaml

I do have a lot of bad references at the moment, but I'm struggling to connect that with this error message ;). Any thoughts?

this is all running on Mac OS X. These messages don't seem to show up on my GitHub Actions builds tho - e.g. these logs

[ctb]

I guess what's going on here is that pandoc is using a web service to convert latex formulas into images -

https://tex.stackexchange.com/questions/463727/how-to-increase-pandoc-equation-resolution

and I'm guessing that it doesn't work from my home internet connection for some reason. How weird!

[agitter]

That's an interesting error if it only occurs with your home connection. Does the URL https://latex.codecogs.com/svg.latex?%5Ctextstyle%20h%28x%29 work from your home connection outside of Pandoc?

The WeasyPrint PDF builds are using these pandoc settings to convert equations to images as you described: https://github.com/dib-lab/2020-paper-sourmash-gather/blob/3b68a362bb35837f4e4bcb97c74a1c2ee53a58a3/build/pandoc/defaults/pdf-weasyprint.yaml#L7-L9

Pandoc has alternatives, but I'm not sure which would work with WeasyPrint. I could test WeasyPrint with method: mathjax if this remains an issue.