Re: Transform a fenced div to mkdocs markdown admonition format

[Aidan Reilly <aireilly-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

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Thanks Albert!

I really appreciate you looking at this. When I run the above, I get this
error:

Error running filter admonitions.lua:
admonitions.lua:10: attempt to index a nil value (local 'opts')
stack traceback:
admonitions.lua:10: in main chunk

Do I need to specify something in the command line? I'm running the build
like so:

asciidoctor -b docbook -o - $PAGE | pandoc  --markdown-headings=atx
--shift-heading-level-by=1 --wrap=none -t markdown+backtick_code_blocks
--lua-filter=admonitions.lua -f docbook - > ./docs/$PAGE.md

On Sat, Nov 5, 2022 at 8:19 AM Albert Krewinkel <albert+pandoc-9EawChwDxG8hFhg+JK9F0w@public.gmane.org>
wrote:

> Aidan Reilly <aireilly-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> writes:
>
> > Trying this, but it's just passing the text of the admonition block
> > through
>
> The order of spaces and newline in the replacement was switched. After
> some playing around, this is the filter I came up with:
>
> ``` lua
> local admonitions = {
>   warning   = '!!! warning',
>   note      = '!!! note',
>   tip       = '!!! tip',
>   important = '!!! important',
>   caution   = '!!! caution'
> }
>
> local opts = PANDOC_WRITER_OPTIONS -- reuse options to render snippets
> opts.columns = opts.columns - 4    -- admons are indented by four spaces
> opts.template = nil                -- render a snippet
>
> function Div (div)
>   local admonition_text = admonitions[div.classes[1]]
>   if not admonition_text then return nil end  -- not an admonition: bail
>
>   local md = admonition_text .. '\n' ..
>     pandoc.write(pandoc.Pandoc(div.content), 'markdown', opts)
>   return pandoc.RawBlock(
>     'markdown',
>     md:gsub('\n*$', '')     -- remove trailing newlines
>       :gsub('\n', '\n    ') -- indent block
>   )
> end
> ```
>
>
> --
> Albert Krewinkel
> GPG: 8eed e3e2 e8c5 6f18 81fe  e836 388d c0b2 1f63 1124
>
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>

-- 
Aidan

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