latex3
Normalise font file paths in XeTeX log messages
While trying to make more use of l3build for biblatex I encountered an issue with XeTeX log comparison: Some file paths are not normalised away (https://github.com/moewew/biblatex/runs/5350350889?check_suite_focus=true). I set up a small example at https://github.com/moewew/buildxetex to demonstrate the problem. Essentially the issue is that a font-switching example such as
\input{regression-test}
\documentclass[a4paper]{article}
\usepackage{fontspec}
\usepackage{libertine}
\usepackage[fallback]{xeCJK}
\begin{document}
\showoutput
\START
Lorem
章學成
ipsum
\clearpage
\OMIT
\end{document}
has something like
Requested font "[FandolSong-Regular.otf]/OT:language=dflt;" at 10.0pt
-> /home/m/texlive/texmf-dist/fonts/opentype/public/fandol/FandolSong-Regular.otf
in the output.
Would it be possible to normalise these file paths away?
In any case I would also not mind additional hints as to how to make this comparison more robust.
The trick we typically use for font issues is to have some throw away content to load them, then \newpage before \START, so those lines are simply dropped.
I will of course think about how to pick up these cases.
Thanks for that idea. I ended up doing https://github.com/plk/biblatex/commit/59e342b587c8d7e512e5ac4de56cd8f9f5bfda25 for now, it ain't pretty, but it works.
blame it on the fact that all engines write things differently into the log :-( ... we do our best but there are always the odd cases left
