Bug 2126535

Description of problem:

Discussion appeared here (EPEL):
https://bugzilla.redhat.com/show_bug.cgi?id=2074197#c16

Solved for EPEL (in preparation):
https://bugzilla.redhat.com/show_bug.cgi?id=2115134#c5

Therefore here the bug report to be corrected upstream.


TLDR Version:

This linkage

[1] /usr/share/texlive/texmf-dist/tex/generic/config/language.dat -> /etc/texlive/tex/generic/config/language.dat

will be broken when language texlive packages execute there scripts, example:

[2] sed -i '/esperanto.*/d' %{_texdir}/texmf-dist/tex/generic/config/language.dat

---

[1]https://src.fedoraproject.org/rpms/texlive/blob/main/f/texlive.spec#_154859
[2] https://src.fedoraproject.org/rpms/texlive/blob/main/f/texlive.spec#_79711


How reproducible:

The texlive package provides in the spec file following (texlive-hyphen-base):

pushd %{buildroot}%{_texdir}/texmf-dist/tex/generic/config/
ln -s ../../../../../../..%{_sysconfdir}/texlive/tex/generic/config/language.dat language.dat

and 

%config(noreplace) %{_sysconfdir}/texlive/tex/generic/config/language.dat

so every texlive-hyphen-${LANGUAGE} package with and sed script line will destroy the above linkage.


After installation of texlive-hyphen-german (post script with just "sed -i") the symlink is substituted and diff shows:

$ diff   /usr/share/texlive/texmf-dist/tex/generic/config/language.dat /etc/texlive/tex/generic/config/language.dat
59,61d58
< german loadhyph-de-1901.tex
< ngerman loadhyph-de-1996.tex
< swissgerman loadhyph-de-ch-1901.tex



Furthermore the config adaption coming from post scripts and landing in the /usr/share/texlive/ namespace (speak all adaption)
will be overwritten if someone for example do a yum reinstall texlive-hyphen-base because only the 
%{_sysconfdir}/texlive/tex/generic/config/language.dat is tagged has %config(noreplace).



Additional info:

A quick look into fedora shows round about 106 of such post scripts lines (so a general problem).

A solution could be the usage of "sed --follow-symlinks" or the usage of the path in the %{_sysconfdir} namespace

esperanto example:

sed --follow-symlinks -i '/esperanto.*/d' %{_texdir}/texmf-dist/tex/generic/config/language.dat
or
sed -i '/esperanto.*/d' %{_sysconfdir}/texlive/tex/generic/config/language.dat