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Fix hyphenation patterns check with recent babel

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This was broken since 2016.

See discussion in https://www.lyx.org/trac/ticket/13112
This commit is contained in:
Juergen Spitzmueller 2024-10-16 12:05:09 +02:00
parent 705c82893a
commit ee63d0890e
1 changed files with 17 additions and 8 deletions
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25
lib/chkconfig.ltx
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@ -212,13 +212,14 @@
\AddPackage[\expandafter\@parse@version\fmtversion//00\@nil]{LaTeX}
%%% And now, the list of available languages
% The trick is to know that \the\everyjob contains something like
% Up to 2016 \the\everyjob contains something like
% \typeout{LaTeX2e <2001/06/01>}
% \typeout{Babel <v3.7h> and hyphenation patterns for american, french, german, ngerman, nohyphenation, loaded.}
% All we have to do is to extract the list from there:
% (1) concatenate all the messages that are displayed everytime the
% format is loaded. The is done by redefining locally \typeout to
% append its argument to the macro \mesg.
% But see below for recent versions of babel.
\def\mesg{}
{\def\typeout#1{\xdef\mesg{\mesg #1}}
\the\everyjob}
@ -226,19 +227,27 @@
% (2) strip the useless parts from \mesg. This uses the fact that TeX
% allows to define macros with parameters delimited by arbitrary text.
\def\platexname{pLaTeX2e}
\def\langs{}
\ifx\pfmtname\platexname
\def\langs{japanese}
\else
\def\strip#1patterns for #2, loaded.#3\endmark{\def\langs{#2}}
\expandafter\strip\mesg\endmark
\ifx\mesg\empty
% As of 2016, babel does not print out the loaded hyphenation patterns to
% the log anymore, so \mesg will be empty. For the following method,
% see https://tex.stackexchange.com/questions/330085/
\@ifundefined{bbl@languages}{}{
\def\bbl@elt#1#2#3#4{#1, }
\edef\@langs{\bbl@languages}
\def\strip#1, \endmark{\def\langs{#1}}
\expandafter\strip\@langs\endmark
}
\else
\def\strip#1patterns for #2, loaded.#3\endmark{\def\langs{#2}}
\expandafter\strip\mesg\endmark
\fi
\fi
% (3) handle the result
% FIXME: As of 2016, babel does not print out the loaded hyphenation patterns to
% the log anymore, so this discontinues to work. For possible workarounds
% (with babel), see https://tex.stackexchange.com/questions/330085/
% Leaving this activated for the time being, since it probably still
% works with older distributions.
\message{^^J\prefix checking for available hyphenation patterns... \langs}
\AddVariable{languages}{\langs}