[bug#27689] [PATCH] gnu: grub-efi: Add mtools input.

[Danny Milosavljevic <dannym@scratchpost.org>]

* gnu/packages/bootloaders.scm: Add (gnu packages mtools).
(grub-efi)[inputs]: Add mtools.
[arguments]: Add phase "use-absolute-mtools-path".
---
 gnu/packages/bootloaders.scm | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/bootloaders.scm b/gnu/packages/bootloaders.scm
index 9ae617528..9c6927f2a 100644
--- a/gnu/packages/bootloaders.scm
+++ b/gnu/packages/bootloaders.scm
@@ -37,6 +37,7 @@
   #:use-module (gnu packages gettext)
   #:use-module (gnu packages linux)
   #:use-module (gnu packages man)
+  #:use-module (gnu packages mtools)
   #:use-module (gnu packages ncurses)
   #:use-module (gnu packages perl)
   #:use-module (gnu packages python)
@@ -149,6 +150,7 @@ menu to select one of the installed operating systems.")
     (synopsis "GRand Unified Boot loader (UEFI version)")
     (inputs
      `(("efibootmgr" ,efibootmgr)
+       ("mtools", mtools)
        ,@(package-inputs grub)))
     (arguments
      `(;; TODO: Tests need a UEFI firmware for qemu. There is one at
@@ -166,7 +168,19 @@ menu to select one of the installed operating systems.")
                      (("efibootmgr")
                       (string-append (assoc-ref inputs "efibootmgr")
                                      "/sbin/efibootmgr")))
-                   #t)))))))))
+                   #t))
+               (add-after 'patch-stuff 'use-absolute-mtools-path
+                 (lambda* (#:key inputs #:allow-other-keys)
+                   (let ((mtools (assoc-ref inputs"mtools")))
+                     (substitute* "util/grub-mkrescue.c"
+                       (("\"mformat\"")
+                        (string-append "\"" mtools
+                                       "/bin/mformat\"")))
+                     (substitute* "util/grub-mkrescue.c"
+                       (("\"mcopy\"")
+                        (string-append "\"" mtools
+                                       "/bin/mcopy\"")))
+                     #t))))))))))
 
 (define-public syslinux
   (let ((commit "bb41e935cc83c6242de24d2271e067d76af3585c"))