Skipping files with includeonly leads to compilation errors

[teepeemm]

The following compiles fine:

\DocumentMetadata{testphase={latest},lang=en}
\begin{filecontents*}{includedFile.tex}
Some content to create a tag in an included file.
\end{filecontents*}
%\includeonly{nothing}
\documentclass{article}
\begin{document}
Some content to create a tag
\include{includedFile}
\end{document}

If I then uncomment the \includeonly command, however, I get the errors

./root.tex:10: Package tagpdf Error: objnum missing for structure 7

Type <return> to continue.
 ...                                              
                                                  
l.10 \end{document}
                   
? 

./root.tex:10: Package tagpdf Error: objnum missing for structure 8

Type <return> to continue.
 ...                                              
                                                  
l.10 \end{document}
                   
? 

(and it appears that the more complicated an included file is, the more errors that I get).

[u-fischer]

hm, yes. Looking back it was probably the wrong decision to use an latex counter for the structures. I had some vage idea that it would help with trial typesetting, but in the end it never came true, we suspend tagging in such places.

I will test if one can use an normal int instead. For now you could use \DocumentMetadata{tagging=draft,lang=en} when using \includeonly, this doesn't write the structures at the end.

[teepeemm]

But with tagging=draft, the output doesn't seem to be tagged at all.

I've found that, just after the \include command, if I subtract the number of errors off of g__tag_struct_abs_int (in this case \ExplSyntaxOn \addtocounter{g__tag_struct_abs_int}{-2} \ExplSyntaxOff), then I don't get the errors. But I'm not sure of other consequences (it appears that pdflatex gets confused and collapses all text tags to one, but lualatex is ok). I would also need to look into \include enough to figure out how to subtract that off whenever \includeonly excluded the file.

Or will lualatex-dev work in this case in the near future, and will take care of the count on its own?

[u-fischer]

I'm planing an tagpdf update today or tomorrow which will avoid this error. (I'm not sure if then everything works. And I certainly recommend to prefer lualatex, the structure there gets less easily confused).