Hi
> (2) Run lualatex with the below LaTeX source and have error
> "Package fontspec Error: The font "NotoSerifCJKJPLight" cannot be found."
Yes, because luatexja preloads all the fonts defined in the noto-otf
preset:
\ltjpreset_declare_preset:nx{noto-otf}{
mc-m = Noto~Serif~CJK~JP~Regular,
mc-bx = Noto~Serif~CJK~JP~Bold,
gt-d = Noto~Sans~CJK~JP~Regular,
gt-bx = Noto~Sans~CJK~JP~Bold,
gt-u = Noto~Sans~CJK~JP~Medium,
gt-eb = Noto~Sans~CJK~JP~Black,
mg-m = Noto~Sans~CJK~JP~Black,
mc-l = Noto~Serif~CJK~JP~Light,
__custom = false, __office = false, __noembed = false,
}
Thus it fails if the font is not installed.
I haven't seen the uplatex version of your document, but I guess you
load the fonts with the otf package. There the fonts are only necessary
when calling dvipdfmx, and thus only the actually needed fonts are
loaded.
> This seems a feature or a bug in TeXLive 2019 upstream, which should not have
> been filed in BTS. So I close this issue.
I think this is neither a feature nor a bug, it is just that the two
systems work differently.
You can ask the luatexja maintainers to implement on-demand loading of
fonts, but I am not sure how feasible this is.
All the best
Norbert
--
PREINING Norbert http://www.preining.info
Accelia Inc. + JAIST + TeX Live + Debian Developer
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