Figure reference links on epub files are wrong

[Gabriel Volpe]

I am working on a book consisting of 12 markdown files, and I added a first link reference to a figure using pandoc-fignos.

![critical services](img/critical-services.png){#fig:1 width=70%}

*@fig:1 shows a system...

The PDF output is correct, and the figure is linked correctly. However, the epub is pointing to the wrong file. It seems to be getting confused by the files generated by pandoc itself when using --epub-chapter-level=2.

Here's a screenshot of the command I use to generate the epub file.

Something that is probably relevant, is that I'm using number-sections together with {.unnumbered}. So all the markdown files which names start with 00 are unnumbered. The rest are numbered.

pandoc-fignos seems to count these unnumbered sections and cross-reference the links to them.

Not sure if that's a good assessment of the issue. I'd appreciate any ideas, workarounds, etc.

---

Versions

$ pandoc --version
pandoc 2.11.4
Compiled with pandoc-types 1.22, texmath 0.12.1.1, skylighting 0.10.4,
citeproc 0.3.0.7, ipynb 0.1.0.1
$ pandoc-fignos --version
pandoc-fignos 2.4.0

[Gabriel Volpe]

My current workaround is to disable figure links for epub files, but enable them for pdf files (via latex).

To do so, I disable links on markdown files. E.g.

@fig:id{nolink=True}

And then I apply the following Lua filter when generating the PDF file.

return {
  {
    Str = function (elem)
      if elem.text == "{nolink=True}" then
        return pandoc.Emph {pandoc.Str ""}
      else
        return elem
      end
    end,
  }
}

It is not ideal, but it is at least correct.