Re: Possible bugs in the markdown to PDF via lualatex conversion process for bilingual documents

["Clément Aubert" <aubert.clement-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

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Ok, we could also use 

\babelfont[english]{rm}[Path=fonts/,Extension=.otf,UprightFont=*-regular,BoldFont=*-bold,ItalicFont=*-italic,BoldItalicFont=*-BoldItalic]{texgyretermes}

instead of 

\babelfont[english]{rm}{fonts/texgyretermes-regular.otf}

This could make everything easier…
Le jeudi 9 février 2023 à 12:27:53 UTC-5, Clément Aubert a écrit :

> Hi,
>
> I may have found a similar bug, but find it *very hard* to understand its 
> exact causes.
>
> In a rather long document, I have the following options in my YAML:
>
> ---
> documentclass: scrbook
> mainfont: texgyretermes
> mainfontoptions:
> - Path=fonts/
> - Extension=.otf
> - UprightFont=*-regular
> - BoldFont=*-bold
> - ItalicFont=*-italic
> - BoldItalicFont=*-BoldItalic
> fontsize: 12pt
> ---
>
> Now, some combination of LaTeX packages (or something else?) that I load 
> makes pandoc output, in the .tex document
>
> \ifLuaTeX
> \usepackage[bidi=basic]{babel}
> \else
> \usepackage[bidi=default]{babel}
> \fi
> \babelprovide[main,import]{english}
> \ifPDFTeX
> \else
> \babelfont[english]{rm}{texgyretermes}
> \fi
>
> When I compile said document with XeLaTeX, I get
>
> kpathsea: Running mktextfm TeXGyreTermes/OT
>
>
> but that font is not found, and hence I get the error
>
>
> Package fontspec Error: The font "TeXGyreTermes" cannot be found. 
> \babel@aux{english}{}
>
>
> If I replace 
>
>
> \babelfont[english]{rm}{texgyretermes}
>
>
> with
>
>
> \babelfont[english]{rm}{fonts/texgyretermes-regular.otf}
>
> then the document can be compiled.
>
> Is this a bug?
>
> I am using the latest version,
> pandoc 3.0.1
> Features: +server +lua
> Scripting engine: Lua 5.4
> User data directory: /home/caubert/.local/share/pandoc
> Copyright (C) 2006-2023 John MacFarlane. Web:  https://pandoc.org
> This is free software; see the source for copying conditions. There is no
> warranty, not even for merchantability or fitness for a particular purpose.
>
> Best,
> And thanks,
> Clément.
> Le mardi 8 février 2022 à 16:35:00 UTC-5, John MacFarlane a écrit :
>
>>
>> Let us know what version of pandoc you're using. 
>> There have been extensive changes recently that might be 
>> relevant (we no longer use polyglossia, but of course 
>> it's possible that something relating to our old polyglossia 
>> support was left in the template...). 
>>
>> "R (Chandra) Chandrasekhar" <chya...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes: 
>>
>> > I am writing a bilingual test file for English and Tamil in the same 
>> > markdown document to yield a PDF via lualatex and babel. The file, 
>> which 
>> > correctly gives HTML and epub outputs, is: 
>> > 
>> > ``` 
>> > --- 
>> > title: "Bilingual Test for LuaLaTeX and Babel: English and Tamil" 
>> > lang: en-GB 
>> > --- 
>> > 
>> > This is English. 
>> > 
>> > {\sffamily This is also English.} 
>> > 
>> > இது தமிழ். 
>> > 
>> > {\sffamily இதுவும் தமிழ்.} 
>> > 
>> > :::{lang=ta} 
>> > இது கூட தமிழ் தான். 
>> > ::: 
>> > 
>> > Back to English and EOF. 
>> > ``` 
>> > 
>> > The included `babel-in-header.tex` file is: 
>> > 
>> > ``` 
>> > % babel-in-header.textsf 
>> > \babelfont{rm}[Scale=1.0,Language=Default,BoldFont={* SemiBold}]{Noto 
>> Serif} 
>> > \babelfont{sf}[Language=Default,BoldFont={* SemiBold}]{Noto Sans} 
>> > \babelfont[tamil]{rm}[Language=Default]{Noto Serif Tamil} 
>> > \babelfont[tamil]{sf}[Language=Default]{Noto Sans Tamil} 
>> > \babelprovide[import,onchar=ids fonts]{tamil} 
>> > 
>> \defaultfontfeatures{Scale=MatchLowercase,Ligatures=TeX,Renderer=HarfBuzz} 
>> > \thispagestyle{empty} 
>> > ``` 
>> > 
>> > The compilation command is: 
>> > 
>> > pandoc --from markdown --to latex --include-in-header 
>> > babel-in-header.tex --standalone --output en-ta-test.tex en-ta-test.md 
>> > 
>> > I find that the generated .tex file cannot be compiled to PDF because 
>> > there appear to be two errors, which might be bugs: 
>> > 
>> > 1. The \babelfont commands appear _before_ the \usepackage{babel} 
>> > invocation in the .tex file because of a commented requirement for 
>> > polyglossia, which I am not using. As a result, I get an 
>> > 
>> > ``` 
>> > ! Undefined control sequence. 
>> > l.59 \babelfont 
>> > {rm}[Scale=1.0,Language=Default,BoldFont={* 
>> > SemiBold}]{Noto Serif} 
>> > ``` 
>> > 
>> > error with lualatex. 
>> > 
>> > 2. If I manually transpose the \babelfont commands inserted by the 
>> > `babel-in-header.tex` file to appear _after_ the babel invocation but 
>> > before \title in the .tex file, I get this error: 
>> > 
>> > ``` 
>> > ! Package babel Error: Unknown option 'tamil'. Either you misspelled it 
>> > (babel) or the language definition file tamil.ldf was not 
>> > found. 
>> > 
>> > 
>> > See the babel package documentation for explanation. 
>> > ``` 
>> > 
>> > 3. If I remove `tamil,` from the babel invocation, 
>> > 
>> > ``` 
>> > \usepackage[tamil,main=british]{babel} 
>> > ``` 
>> > 
>> > I am able to compile with lualatex, using the same command as before, 
>> > and get the expected PDF, as shown in the attached screenshot. 
>> > 
>> > I realize that both pandoc and the babel package are under development, 
>> > and are therefore moving targets. 
>> > 
>> > Nevertheless, I believe these are bugs in the markdown to latex 
>> > conversion process and point them out so that they may be corrected or 
>> > circumvented, automatically rather than manually, from the pandoc end. 
>> > 
>> > Thanks. 
>> > 
>> > Chandra 
>> > 
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>>
>>
>

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