From 6603342bb6204a2b147ffa7e18eaf4bd41fba882 Mon Sep 17 00:00:00 2001
From: Vincenzo Mantova <xworld21@users.sf.net>
Date: Sun, 4 Jul 2021 11:47:33 +0100
Subject: [PATCH] texlive.combine: generate language.dat.lua

---
 pkgs/tools/typesetting/tex/texlive/combine.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/pkgs/tools/typesetting/tex/texlive/combine.nix b/pkgs/tools/typesetting/tex/texlive/combine.nix
index a4b78a481035..17e46d3f93f9 100644
--- a/pkgs/tools/typesetting/tex/texlive/combine.nix
+++ b/pkgs/tools/typesetting/tex/texlive/combine.nix
@@ -137,12 +137,20 @@ in (buildEnv {
         # pick up the footer (for language.def)
         + "/^%%% No changes may be made beyond this point.$/,$p;\n"
       );
+    scriptLua =
+      writeText "hyphens.lua.sed" (
+        "1{ s/^(-- Generated by .*)$/\\1, modified by texlive.combine/; p; }\n"
+        + "2,/^-- END of language.us.lua/p;\n"
+        + lib.concatMapStrings (pname: section "^-- from ${pname}:$" "^}$|^-- from") pnames
+        + "$p;\n"
+      );
   in ''
     (
       cd ./share/texmf/tex/generic/config/
       for fname in language.{dat,def}; do
         [[ -e "$fname" ]] && sed -E -n -f '${script}' -i "$fname"
       done
+      [[ -e language.dat.lua ]] && sed -E -n -f '${scriptLua}' -i language.dat.lua
     )
   '') +