Okay, I have put together a Lua filter to do this that I'm happy with, and 
it makes the correct changes to the data in the AST (everything looks right 
when I print --to native). However, I'm running into an issue when actually 
writing out to HTML. My filter first calls make_sections to create the divs 
from the headers (seemed reasonable so I don't have to recreate the wheel), 
and then goes in, finds the Div blocks with class "article", creates the 
new <article> opening and closing tags, and removes the original Div, 
putting its content between the <article> tags. All is well.

However, when I am writing to HTML, if I don't include --section-divs in 
the call, the resulting HTML doesn't include any of the <section>s for the 
other headers (the ones I didn't convert to articles), even though they 
exist in the AST after being created by make_sections. However, if I do 
call --section-divs, apparently make_sections gets called a second time, 
because the heading I just wrapped with an <article> is now wrapped in 
_another_ <section> tag (the <article> tag remains), despite having removed 
the wrapping Div entirely from around that header. This behavior occurs 
regardless of whether I call --section-divs before or after the filter. 

So the --section-divs option is doing more than just calling make_sections, 
and has a larger role in the HTML writer. Thus, I can't exclude it from the 
call. 
On the other hand, if it calls make_sections a second time, and I can't 
control when that happens, it ends up writing invalid markup. So I can't 
include it. 

I am officially stuck. I'm not sure if this is proper behavior of 
--section-divs or a bug, but I'm unsure how to work around it in either 
case. Happy to provide an MRE and my Lua filter if it would help, or take 
this over to the Issue Tracker and file a bug report if that's what it is. 

On Sunday, July 18, 2021 at 11:45:07 AM UTC-7 John MacFarlane wrote:

> Connor Patrick Jackson <cpja...-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> writes:
>
> > Sounds good to me! I've got half of a filter set up to do this, if 
> someone 
> > could just point me in the right direction. Is there a way to hook into 
> the 
> > HTML writer and tell it which tag to use for the div/section? Or would I 
> > have to go the route of just adding the tags manually as RawInline and 
> > removing the Section class? (or some third, better approach that I'm not 
> > seeing because this is the first time I've written a filter)? Thanks!
>
> Exactly, you'd have to add the tags manually.
>
>

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