Why is quran package installed by default on Texlive2020

[Zdenek Wagner]

Hi Karl,

thank you for explanation.

po 18. 5. 2020 v 0:51 odesílatel Karl Berry <karl at freefriends.org> napsal:
>
> Hi Zdenek,
>
>     IMHO collection-xetex should contain files for the formats (plain
>     XeTeX, XeLaTeX), polyglossia, fontspec and possibly a few more
>     packages needed generally for use with the XeTeX engine.
>
> Sorry, that doesn't work, because collections partition all the
> packages, as has been said a couple times already. fontspec does not
> work *only* with xetex, as you know.
>
> So the general purpose of c-xetex (and c-luatex) is not to provide the
> engine and "core packages", natural as that sounds. Rather, it is to
> provide packages that work with only the given engine. So that if
> someone does not have or want XeTeX, they don't have to end up with
> XeTeX-only packages either. c-xetex includes both the engine and such
> packages.
>
> To add more complication, XeTeX and LuaTeX aren't parallel any more
> (though they were for some years). LuaTeX, or rather TeXLua, has since
> become an integral part of the system, so it has to be (and is) in
> c-basic. On the other hand, people might not ever want to typeset with
> luatex ("[pdf]tex is good enough for me"), so again, c-luatex is
> intended to be packages that only work with luatex.
>
> The {Xe,Lua}LaTeX formats add yet another layer of complication. I'm not
> going to try to describe what I've done there. It's the best I can come
> up with.
>
> As has happened with quran, I'm sure some packages have gained support
> for the other engine since they were first releases and thus are
> misclassified now. I don't try to track that specifically (sometimes I
> happen to notice), since it makes little difference in practice, but
> just wait for user reports ... as you did here. --best, karl.

Zdeněk Wagner
http://ttsm.icpf.cas.cz/team/wagner.shtml
http://icebearsoft.euweb.cz