1 files changed, 65 insertions, 0 deletions
diff --git a/gnu/packages/tex.scm b/gnu/packages/tex.scm
index 910be212ac..256fe7da90 100644
--- a/gnu/packages/tex.scm
+++ b/gnu/packages/tex.scm
@@ -3746,6 +3746,71 @@ loading fonts by their proper names instead of file names.")
 
 (define-deprecated-package texlive-luatex-luaotfload texlive-luaotfload)
 
+;; FIXME: This package is a temporary workaround to provide ‘lualatex.fmt’ for
+;; the LuaTeX engine. It is needed because it was discovered too late in the
+;; core-updates-frozen cycle that texlive-latex-base only provides it for
+;; LuaHBTeX. See https://issues.guix.gnu.org/51252.
+(define-public texlive-latex-luatex
+  (package
+    (name "texlive-latex-luatex")
+    (version (number->string %texlive-revision))
+    (source #f)
+    (build-system gnu-build-system)
+    (arguments
+     `(#:modules ((guix build gnu-build-system)
+                  (guix build utils)
+                  (ice-9 rdelim)
+                  (ice-9 string-fun))
+       #:phases
+       (modify-phases %standard-phases
+         (delete 'unpack)
+         (delete 'bootstrap)
+         (delete 'configure)
+         (delete 'check)
+         (replace 'build
+           (lambda* (#:key inputs #:allow-other-keys)
+             (mkdir "web2c")
+             (let ((fmtutil.cnf-in (open-file
+                                    (string-append
+                                     (assoc-ref inputs "texlive-kpathsea")
+                                     "/share/texmf-dist/web2c/fmtutil.cnf")
+                                    "r"))
+                   (fmtutil.cnf-out (open-file "web2c/fmtutil.cnf" "w")))
+
+               ;; Copy ‘lualatex’ format lines to the new fmtutil.cnf, changing
+               ;; the engine from ‘luahbtex’ to ‘luatex’.
+               (do ((line "" (read-line fmtutil.cnf-in 'concat)))
+                   ((eof-object? line))
+                 (when (string-prefix? "lualatex" line)
+                   (display (string-replace-substring line "luahbtex" "luatex")
+                            fmtutil.cnf-out)))
+               (close-port fmtutil.cnf-out)
+               (close-port fmtutil.cnf-in)
+
+               (invoke "fmtutil" "--sys" "--all" "--fmtdir=web2c"
+                       "--cnffile=web2c/fmtutil.cnf")
+
+               ;; Don't risk this file interfering with anything else.
+               (delete-file "web2c/fmtutil.cnf"))))
+         (replace 'install
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let ((web2c (string-append %output "/share/texmf-dist/web2c")))
+               (mkdir-p web2c)
+               (copy-recursively "web2c" web2c)))))))
+    (native-inputs
+     `(("texlive-bin" ,texlive-bin)
+       ("texlive-babel" ,texlive-babel)
+       ("texlive-cm" ,texlive-cm)
+       ("texlive-fonts-latex" ,texlive-fonts-latex)
+       ("texlive-kpathsea" ,texlive-kpathsea)
+       ("texlive-latex-base" ,texlive-latex-base)
+       ("texlive-lm" ,texlive-lm)
+       ("texlive-tex-ini-files" ,texlive-tex-ini-files)))
+    (home-page (package-home-page texlive-latex-base))
+    (synopsis "LuaLaTeX format files for LuaTeX")
+    (description "This package is necessary to use LaTeX with the LuaTeX engine.")
+    (license (package-license texlive-latex-base))))
+
 (define-public texlive-latex-amsmath
   (package
     (name "texlive-latex-amsmath")