gnu: texlive-minted: Fix runtime error.

Fixes <https://issues.guix.gnu.org/78868>.

* gnu/packages/tex.scm (texlive-minted)[arguments]: Add a phase to help the script finding `kpsewhich'.

Change-Id: Idb8f7bddc92ecde5fbc9217fdcfbaa5c132ec6e0

gnu/packages/tex.scm

@@ -84271,7 +84271,21 @@ configuration of its own fixed names, using @file{.mld} files.")
     (outputs '("out" "doc"))
     (build-system texlive-build-system)
     (arguments
-     (list #:link-scripts #~(list "latexminted.py")))
+     (list
+      #:link-scripts #~(list "latexminted.py")
+      #:phases
+      #~(modify-phases %standard-phases
+          (add-after 'link-scripts 'wrap-latexminted
+            ;; `latexminted' relies on SELFAUTOLOC to locate `kpsewhich', but
+            ;; this variable is bogus in Guix because binaries are scattered
+            ;; across multiple directories.  This phase sets SELFAUTOLOC to
+            ;; the specific directory containing `kpsewhich'.
+            (lambda* (#:key inputs outputs #:allow-other-keys)
+              ;; XXX: Use `wrap-program' rather than `wrap-script' because
+              ;; with the latter, ".whl" files are not properly recognized.
+              (wrap-program (search-input-file outputs "bin/latexminted")
+                `("SELFAUTOLOC" =
+                  (,(dirname (search-input-file inputs "bin/kpsewhich"))))))))))
     (inputs (list python))
     (propagated-inputs
      (list texlive-catchfile