* How best to determine (in a lua filter) that PDF is being generated?
@ 2023-03-28 17:37 'William Lupton' via pandoc-discuss
[not found] ` <CAEe_xxhU3eFmbb-XT640STjhrhbeWd75SkRf_ggYYZ3Gx1E79Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
0 siblings, 1 reply; 4+ messages in thread
From: 'William Lupton' via pandoc-discuss @ 2023-03-28 17:37 UTC (permalink / raw)
To: pandoc-discuss
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Hello,
I'm generating PDF using wkhtmltopdf, so "to" is "html" and I don't see the
PDF engine in any of the globals. Should I just look at the output file
name?
Thanks,
William
PS, My filter adds some JavaScript to header-includes. I'm doing this as a
RawBlock(html) but I think I need to omit it when the HTML will be
converted to PDF (wkhtmltopdf complains).
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* Re: How best to determine (in a lua filter) that PDF is being generated?
[not found] ` <CAEe_xxhU3eFmbb-XT640STjhrhbeWd75SkRf_ggYYZ3Gx1E79Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
@ 2023-03-29 8:49 ` BPJ
[not found] ` <CADAJKhDfsFvqD--hJWQ+UGoVibGzHKeZ3qaqKUU1yYk5uxxRHQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2023-03-29 9:08 ` Albert Krewinkel
1 sibling, 1 reply; 4+ messages in thread
From: BPJ @ 2023-03-29 8:49 UTC (permalink / raw)
To: pandoc-discuss
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Den tis 28 mars 2023 19:38'William Lupton' via pandoc-discuss <
pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org> skrev:
> Hello,
>
> I'm generating PDF using wkhtmltopdf, so "to" is "html" and I don't see
> the PDF engine in any of the globals. Should I just look at the output file
> name?
>
As a last resort I set a 'flag' in metadata and inspect that:
``````lua
local make_pdf
local Meta = function(meta)
-- For use outside this function
make_pdf = meta['my-filter-pdf']
if not (make_pdf) then
local includes = meta['header-includes']
-- Make sure we have a list
if 'List' ~= pandoc.utils.type(includes) then
if nil == includes then
includes = pandoc.List({ })
else
-- Assume the current value makes sense as a meta list item
includes = pandoc.List({ includes })
end
end
includes:insert(pandoc.RawBlock('html', [=[...]=]))
meta['header-includes'] = includes
return meta
end
return nil
end
return {
{ Meta = Meta },
main_filter
}
``````
``````
% pandoc -L my-filter.lua -M my-filter-pdf ...
``````
At least guaranteed surprise free...
> Thanks,
> William
>
> PS, My filter adds some JavaScript to header-includes. I'm doing this as a
> RawBlock(html) but I think I need to omit it when the HTML will be
> converted to PDF (wkhtmltopdf complains).
>
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> <https://groups.google.com/d/msgid/pandoc-discuss/CAEe_xxhU3eFmbb-XT640STjhrhbeWd75SkRf_ggYYZ3Gx1E79Q%40mail.gmail.com?utm_medium=email&utm_source=footer>
> .
>
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* Re: How best to determine (in a lua filter) that PDF is being generated?
[not found] ` <CADAJKhDfsFvqD--hJWQ+UGoVibGzHKeZ3qaqKUU1yYk5uxxRHQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
@ 2023-03-29 9:04 ` 'William Lupton' via pandoc-discuss
0 siblings, 0 replies; 4+ messages in thread
From: 'William Lupton' via pandoc-discuss @ 2023-03-29 9:04 UTC (permalink / raw)
To: pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw
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I'll do that (maybe with a fallback on an output file name check). Thanks!
On Wed, 29 Mar 2023 at 09:49, BPJ <bpj-J3H7GcXPSITLoDKTGw+V6w@public.gmane.org> wrote:
>
>
> Den tis 28 mars 2023 19:38'William Lupton' via pandoc-discuss <
> pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org> skrev:
>
>> Hello,
>>
>> I'm generating PDF using wkhtmltopdf, so "to" is "html" and I don't see
>> the PDF engine in any of the globals. Should I just look at the output file
>> name?
>>
>
> As a last resort I set a 'flag' in metadata and inspect that:
>
> ``````lua
> local make_pdf
> local Meta = function(meta)
> -- For use outside this function
> make_pdf = meta['my-filter-pdf']
> if not (make_pdf) then
> local includes = meta['header-includes']
> -- Make sure we have a list
> if 'List' ~= pandoc.utils.type(includes) then
> if nil == includes then
> includes = pandoc.List({ })
> else
> -- Assume the current value makes sense as a meta list item
> includes = pandoc.List({ includes })
> end
> end
> includes:insert(pandoc.RawBlock('html', [=[...]=]))
> meta['header-includes'] = includes
> return meta
> end
> return nil
> end
> return {
> { Meta = Meta },
> main_filter
> }
> ``````
>
> ``````
> % pandoc -L my-filter.lua -M my-filter-pdf ...
> ``````
>
> At least guaranteed surprise free...
>
>
>> Thanks,
>> William
>>
>> PS, My filter adds some JavaScript to header-includes. I'm doing this as
>> a RawBlock(html) but I think I need to omit it when the HTML will be
>> converted to PDF (wkhtmltopdf complains).
>>
>> --
>> You received this message because you are subscribed to the Google Groups
>> "pandoc-discuss" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
>> To view this discussion on the web visit
>> https://groups.google.com/d/msgid/pandoc-discuss/CAEe_xxhU3eFmbb-XT640STjhrhbeWd75SkRf_ggYYZ3Gx1E79Q%40mail.gmail.com
>> <https://groups.google.com/d/msgid/pandoc-discuss/CAEe_xxhU3eFmbb-XT640STjhrhbeWd75SkRf_ggYYZ3Gx1E79Q%40mail.gmail.com?utm_medium=email&utm_source=footer>
>> .
>>
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> <https://groups.google.com/d/msgid/pandoc-discuss/CADAJKhDfsFvqD--hJWQ%2BUGoVibGzHKeZ3qaqKUU1yYk5uxxRHQ%40mail.gmail.com?utm_medium=email&utm_source=footer>
> .
>
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* Re: How best to determine (in a lua filter) that PDF is being generated?
[not found] ` <CAEe_xxhU3eFmbb-XT640STjhrhbeWd75SkRf_ggYYZ3Gx1E79Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2023-03-29 8:49 ` BPJ
@ 2023-03-29 9:08 ` Albert Krewinkel
1 sibling, 0 replies; 4+ messages in thread
From: Albert Krewinkel @ 2023-03-29 9:08 UTC (permalink / raw)
To: pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw
"'William Lupton' via pandoc-discuss" <pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org> writes:
> I'm generating PDF using wkhtmltopdf, so "to" is "html" and I don't
> see the PDF engine in any of the globals. Should I just look at the
> output file name?
Pandoc doesn't expose that information, only the main program knows
whether a PDF will be produced. Feel free to open a feature request for
this.
--
Albert Krewinkel
GPG: 8eed e3e2 e8c5 6f18 81fe e836 388d c0b2 1f63 1124
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2023-03-28 17:37 How best to determine (in a lua filter) that PDF is being generated? 'William Lupton' via pandoc-discuss
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2023-03-29 8:49 ` BPJ
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2023-03-29 9:04 ` 'William Lupton' via pandoc-discuss
2023-03-29 9:08 ` Albert Krewinkel
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