On Friday, 15 January 2021 at 04:19:51 UTC-5 BP wrote:

Almost there. You need

`content = {pandoc.Str"Foo"}`

since the content of a Header is a list of inline elements.

As for multiple possible values Lua patterns are, as you seem to have discovered, a bit challenged in that they don't support alternations. The best solution is to use a table:

``````lua
-- Localize `pandoc` to a shorter name to save space & type less!
local p = pandoc

-- This is your "substitution" table.
local text4match = {
-- If you need styling do this:
foo = { p.Str"Foo", p.Space(), p.Str"and", p.Space(), p.Emph(p.Str"more.") },
-- If you do not need styling you can do this:
bar = { p.Str"Bar and less." },
}

function RawBlock (elem)
local key = elem.text:match"%<%!%-%-%s*(%a+)%s*%-%-%>"
if key then
local text = text4match[key]
if text then
return p.Header(2, text)
end
end
-- No match, no text, ignore this elem
return nil
end
``````

HTH,

/bpj

--
Better --help|less than helpless

Den fre 15 jan. 2021 04:39Peter Matulis <pmat...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> skrev:
So I now have this:

function RawBlock(el)
if el.text:match("%<%!%-%- foo %-%-%>") then
content = "foo"
return pandoc.Header(2, content)
end
end

There are actually about a dozen such known Markdown comments (e.g. 'foo', 'bar').
Instead of creating multiple files I'd like to have just one that uses a regex and capture group:

if el.text:match("%<%!%-%- (%a+) %-%-%>") then

I'm just unsure how to refer to the capture in a conditional statement
(i.e. "if 'foo' is captured then 'content' = "foo", elsif 'bar' is captured then 'content' = "bar").

On Thu, 14 Jan 2021 at 15:57, Peter Matulis <pmat...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
Gratitude. This got me going.

On Thu, 14 Jan 2021 at 13:52, John MacFarlane <j...-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org> wrote:

What you want to do is match on a RawBlock element.
Something like

function RawBlock(el)
if el.text:match("
>
> I simply want to convert this into an actual (second-level) MD header:
>
> ## blah
>
> From what I've read, I would ideally specify an "element" that will be
> acted upon, but what is a comment considered? Anyway, I think I can specify
> `Pandoc` to mean "check the entire document", and that's what I've done
> here (I will eventually be iterating through multiple MD files so I should
> really not be doing it like this; please advise!):
>
> function Pandoc (value)
> comment = ""
> comment = comment:gsub("%<%!%-%- blah %-%-%>", "## blah")
> return value
> end
>
> I've run the main logic through Lua on the terminal and it works:
>
> $ lua
> Lua 5.3.3 Copyright (C) 1994-2016 Lua.org, PUC-Rio
>> comment = ""
>> comment = comment:gsub("%<%!%-%- blah %-%-%>", "## blah")
>> print (comment)
> ## blah
>
> But I'm failing to integrate it with Pandoc (no change is registered in
> file.html). It's probably due to my misunderstanding of functions (not a
> programmer!).
>
> TIA.
>
> /pm
>
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