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veprbl merged 1 commit into from
Jan 12, 2024
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texlive: document LuaLaTeX font cache #280080

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20 changes: 20 additions & 0 deletions doc/languages-frameworks/texlive.section.md
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Expand Up @@ -208,3 +208,23 @@ EOF
cp test.pdf $out
''
```

## LuaLaTeX font cache {#sec-language-texlive-lualatex-font-cache}

The font cache for LuaLaTeX is written to `$HOME`.
Therefore, it is necessary to set `$HOME` to a writable path, e.g. [before using LuaLaTeX in nix derivations](https://github.com/NixOS/nixpkgs/issues/180639):
```nix
runCommandNoCC "lualatex-hello-world" {
buildInputs = [ texliveFull ];
} ''
mkdir $out
echo '\documentclass{article} \begin{document} Hello world \end{document}' > main.tex
env HOME=$(mktemp -d) lualatex -interaction=nonstopmode -output-format=pdf -output-directory=$out ./main.tex
''
```

Additionally, [the cache of a user can diverge from the nix store](https://github.com/NixOS/nixpkgs/issues/278718).
To resolve font issues that might follow, the cache can be removed by the user:
```ShellSession
luaotfload-tool --cache=erase --flush-lookups --force
```