Re: Modify writer or extensions inside a filter

["'Angel Joaniquet' via pandoc-discuss" <pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>]

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Thanks, I will do this then.

El vie, 16 abr 2021 a las 15:56, Albert Krewinkel (<
albert+pandoc-9EawChwDxG8hFhg+JK9F0w@public.gmane.org>) escribió:

> You could take full control of the output by creating the desired block
> yourself.
>
> E.g., instead of local cb = pandoc.CodeBlock() ff., you could write
>
> return pandoc.RawBlock('markdown',
>   string.format('``` math\n%s\n```\n', text)
> )
>
> So you'd basically be creating the Markdown yourself, which is
> relatively safe in the case of code blocks (assuming that the math
> doesn't contain ```, which would be very unusual).
>
> HTH,
> Albert
>
>
> 'Angel Joaniquet' via pandoc-discuss <pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>
> writes:
>
> > cross-posting of
> >
> https://stackoverflow.com/questions/67109880/is-it-posible-to-enable-extensions-on-pandoc-filters#comment118648930_67109880
> >
> > The reason is that I want to have all in one file, to diminish the
> > cognitive load
> >
> >
> > El viernes, 16 de abril de 2021 a las 13:41:58 UTC+2, mb21 escribió:
> >
> >> cross-posting of
> >>
> https://stackoverflow.com/questions/67109880/is-it-posible-to-enable-extensions-on-pandoc-filters
> >>
> >> Why do you prefer to set this in the filter instead of on the writer? I
> >> don't think there's a way to do that... because the filter just outputs
> an
> >> AST again, and what you're trying to change is happening in the
> writer...
> >>
> >> On Thursday, April 15, 2021 at 4:20:32 PM UTC+2 Angel Joaniquet wrote:
> >>
> >>> The lua split function is this
> >>>
> >>>
> >>> ```lua
> >>> function split(str,pat)
> >>>    local tbl = {}
> >>>    str:gsub(pat, function(x) tbl[#tbl+1]=x end)
> >>>    return tbl
> >>> end
> >>> ```
> >>>
> >>> El jueves, 15 de abril de 2021 a las 16:08:23 UTC+2, Angel Joaniquet
> >>> escribió:
> >>>
> >>>>
> >>>> I'm trying to make a filter to transform some features of org-mode to
> >>>> GitLab-markdown (not supported by Pandoc out of the box), in
> particular,
> >>>> the math blocks.
> >>>>
> >>>> The filter should work when transforming to `markdown`, but instead of
> >>>> giving the markdown format for the math blocks (enclosed by
> `$$...$$`), it
> >>>> should write the blocks as
> >>>>
> >>>>     ```  math
> >>>>     a + b = c
> >>>>     ```
> >>>>
> >>>> The preces I have now is
> >>>>
> >>>> In org-mode, the math blocks are simply the latex code:
> >>>>
> >>>> ```
> >>>> \begin{equation}
> >>>> a + b = c
> >>>> \end{equation}
> >>>> ```
> >>>>
> >>>> this is parsed as a pandoc AST `RawBlock` with format `latex`. I then
> >>>> remove the first (`\begin{equation}`) an last line
> (`\end{equation}`), and
> >>>> construct a pandoc `CodeBlock` with atrributes `{"math"}`, so the
> >>>> `CodeBlock` object displays in AST as
> >>>>
> >>>> ```
> >>>> CodeBlock ("",["math"],[]) "a + b = c\n"
> >>>> ```
> >>>>
> >>>> and then I let Pandoc create the markdown document, and the written
> >>>> result is
> >>>>
> >>>>     ``` {.math}
> >>>>     a + b = c
> >>>>     ```
> >>>>
> >>>>
> >>>>
> >>>> **The question:**
> >>>> I want the bare `math`, not `{.math}` written, without the use of CLI
> >>>> options.
> >>>>
> >>>>
> >>>> I am aware that this can be done setting the Writer extension
> >>>> `fenced_code_attributes` to false (eg. `$pandoc -w
> >>>> markdown-fenced_code_attributes ...`), but I would much prefer this
> done
> >>>> inside the filter.
> >>>>
> >>>> Or is it possible to set the extensions inside the filter?
> >>>>
> >>>>
> >>>> Here is my atempted lua-filter:
> >>>>
> >>>> ``` lua
> >>>> function RawBlock(rb)
> >>>>    if rb.format == "latex" then
> >>>>       local text = rb.text
> >>>>       split_text =  split(text, "[^\n]*")
> >>>>       if split_text[1] == '\\begin{equation}'  and
> >>>> split_text[#split_text-1] == '\\end{equation}' then
> >>>>          table.remove(split_text, #split_text-1)
> >>>>          table.remove(split_text, 1)
> >>>>          text = table.concat(split_text, "\n")
> >>>>          local cb = pandoc.CodeBlock()
> >>>>          cb.attr = {"",{"math"}}
> >>>>          cb.text = text
> >>>>          return cb
> >>>>       end
> >>>>    end
> >>>> end
> >>>> ```
> >>>>
> >>>>
> >>>> Kind regards,
> >>>>
> >>>> Angel
> >>>>
> >>>>
> >>>>
> >>>>
> > --
> >
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>
>
> --
> Albert Krewinkel
> GPG: 8eed e3e2 e8c5 6f18 81fe  e836 388d c0b2 1f63 1124
>
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-- 
Angel Joaniquet
Mathemathician


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exclusivamente al destinatario mencionado en el 
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error, le informamos 
que no debe revelar, copiar, distribuir o usarlo en ningún sentido ya que 
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prohibido por la legislación vigente. Rogamos lo comunique al 
remitente y borre dicho mensaje y
cualquier documento adjunto que pudiera 
contener. Los datos personales que usted facilite por correo
electrónico 
podrán ser tratados por Zitro SARL con el fin de responder a su consulta o 
atender su
solicitud, así como gestionar la relación comercial, contractual 
o precontractual con usted. La base
legitimadora de este tratamiento es el 
interés legítimo de Zitro, así como el mantenimiento de la
relación 
contractual o de medidas precontractuales. No se cederán datos a terceros, 
salvo obligación
legal. Sus datos serán conservados durante todo el plazo 
de duración de la relación entre usted y Zitro y,
una vez terminada la 
misma, durante el plazo que determine la legislación aplicable en cada 
momento.
Usted podrá ejercitar en todo momento los derechos reconocidos en 
la normativa de protección de
datos, así como contactar con Zitro a través 
de la siguiente dirección: info-1NcKPjY1c5x0ubjbjo6WXg@public.gmane.org 
<mailto:info-1NcKPjY1c5x0ubjbjo6WXg@public.gmane.org>.

The information contained in this message is 
private and confidential, speaking exclusively to the
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in the heading. If you have received this message by mistake, we inform you 
that
you should not disclose, copy, distribute or use it in any way because 
it is prohibited by current law.
Please notify the sender and delete the 
message and any attachment that might contain. The personal
data you 
provide by email may be processed by Zitro SARL for the purpose of 
responding to your query
or attending to your request, and to manage the 
commercial, contractual or pre-contractual
relationship with you. The 
legitimizing basis of this processing is the legitimate interest of Zitro, 
and the
maintenance of the contractual relationship or pre-contractual 
measures. No data will be passed to
third parties unless there is a legal 
obligation to do so. Your data will be retained throughout the term of
your 
relationship with Zitro and, once that is terminated, for the term legally 
required at any specific
time. You may exercise your rights, as recognized 
in data protection legislation, at any time, and you
may contact Zitro at 
the following email address: info-1NcKPjY1c5x0ubjbjo6WXg@public.gmane.org 
<mailto:info-1NcKPjY1c5x0ubjbjo6WXg@public.gmane.org>.

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