Thanks I wish that worked. I don't know what I'm doing wrong, here's what I've got…

`pandoc --version` says user data dir is `~/.local/share/pandoc` so I placed this file there as `~/.local/share/pandoc/links-with-page-number.lua` and did (just in case) `chmod +x` on it.

`pandoc -o test.pdf test.html` produces a 2page pdf as expected with no footnotes.

`pandoc -L links-with-page-number.lua -o test.pdf test.html` fails to produce pdf file with:
```
Error running filter links-with-page-number.lua:
links-with-page-number.lua: openBinaryFile: does not exist (No such file or directory)
```

There's no typo in my script name or command invocation. Using ~/.pandoc instead of ~/.local/share/pandoc doesn't make any difference, still get that same error.

Any ideas?

On Saturday, November 26, 2022 at 12:34:15 PM UTC-5 Bastien Dumont wrote:
Please find attached a basic implementation. As in the attached sample HMTL file, I suppose that the targets are marked with ids on spans and that you link to it via empty <a> elements. If you have a LaTeX installation, simply do `pandoc -L links-with-page-number.lua -o test.pdf test.html` to see the result.

Le Saturday 26 November 2022 à 05:21:25AM, user account a écrit :
> Thanks! Yeah injecting html in the intermediary document doesn't sound very
> promising either (again, because the pages have to be built first before
> footnotes updated with page #s) so maybe I'll abandon weasyprint in this case,
> if this would be easy to do with a *Tex pdf engine. In that case... how would
> one go about this? Would a lua filter be more capable with a different pdf
> engine or would a different mechanism be used?
>
> On Saturday, November 26, 2022 at 5:28:31 AM UTC-5 Bastien Dumont wrote:
>
> The problem is that Pandoc does not produce the PDF document: it produces
> the intermediary HTML document that is processed by weasyprint to produce
> the PDF. So you cannot get page numbers in a Lua filter.
>
> However, you can inject raw HTML code in the intermediary file (or in your
> CSS) that will make weasyprint print the page numbers. The question is
> whether such HTML code exists. It certainly would be possible to do this if
> you converted to PDF via LaTeX, ConTeXt or groff, but I don't know if it is
> possible via weasyprint.
>
> Le Friday 25 November 2022 à 04:33:05PM, user account a écrit :
> > Using pandoc with weasyprint pdf engine to turn the markdown files from a
> blog
> > (static site generator does the html conversion) into a pdf for print.
> >
> > Would it be possible, perhaps with a custom lua filter or some other
> mechanism,
> > to add the page number of the linked-to page? The page numbers won't be
> known
> > until pandoc has already created the document, and I don't know where in
> 'the
> > pipeline' the lua filter intervenes compared to when the pages exist...?
> And
> > If the pages exist with their numbers earlier enough, is there an object
> or
> > something from which lua can get the page number?
> >
> > I haven't found anything about page numbers in [1]https://pandoc.org/
> > lua-filters.html#module-pandoc.utils ...am I looking in the wrong place?
> Can
> > anyone tell me anything about this?
> >
> > It's an intimidating rabbit hole for me, particularly because I see no
> mention
> > of "page number" there in the docs, which makes it seem kinda hopeless
> > actually. But maybe one of you know the way and could point me in that
> > direction?
> >
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