From 770532b931c312edb9f9a075d86dc132b804dc0b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miguel=20=C3=81ngel=20Arruga=20Vivas?=
 <rosen644835@gmail.com>
Date: Sat, 24 Oct 2020 20:36:21 +0200
Subject: [PATCH v3 3/5] system: Do not depend on locale folder generated by
 grub-install.

* gnu/bootloader/grub.scm (define-module): Use (guix packages).
(grub-locale-folder): New computed folder.
(grub-configuration-file)[locale-config]: Use grub-locale-folder only when a
locale is needed.
---
 gnu/bootloader/grub.scm | 50 ++++++++++++++++++++++++++++++++---------
 1 file changed, 39 insertions(+), 11 deletions(-)

diff --git a/gnu/bootloader/grub.scm b/gnu/bootloader/grub.scm
index f1479024e6..b610ecbfe5 100644
--- a/gnu/bootloader/grub.scm
+++ b/gnu/bootloader/grub.scm
@@ -25,6 +25,7 @@
 
 (define-module (gnu bootloader grub)
   #:use-module (guix build union)
+  #:use-module (guix packages)
   #:use-module (guix records)
   #:use-module (guix store)
   #:use-module (guix utils)
@@ -142,6 +143,25 @@ file with the resolution provided in CONFIG."
             (image->png image #:width width #:height height))
            (_ #f)))))
 
+(define (grub-locale-folder grub)
+  "Generate a folder with the locales from GRUB."
+  (define builder
+    #~(begin
+        (use-modules (ice-9 ftw))
+
+        (define (copy-mo lang-path)
+          (let ((file (string-append lang-path "/LC_MESSAGES/guix.mo"))
+                (mo   (string-append (basename lang-path) ".mo")))
+            (when (file-exists? file)
+              (copy-file file mo))))
+
+        (let* ((locale (string-append #$grub "/share/locale"))
+               (langs  (scandir locale)))
+          (mkdir #$output)
+          (chdir #$output)
+          (for-each copy-mo langs))))
+  (computed-file "grub-boot-locale" builder))
+
 (define* (eye-candy config store-device store-mount-point
                     #:key store-directory-prefix port)
   "Return a gexp that writes to PORT (a port-valued gexp) the 'grub.cfg' part
@@ -402,18 +422,26 @@ menuentry ~s {
                  #:port #~port)))
 
   (define locale-config
-    #~(let ((locale #$(and locale
-                           (locale-definition-source
-                            (locale-name->definition locale)))))
-        (when locale
-          (format port "\
+    (let* ((entry (first all-entries))
+           (device (menu-entry-device entry))
+           (mount-point (menu-entry-device-mount-point entry))
+           (bootloader (bootloader-configuration-bootloader config))
+           (grub (bootloader-package bootloader))
+           (locale-dir (grub-locale-folder grub)))
+
+      #~(let ((locale #$(and locale
+                             (locale-definition-source
+                              (locale-name->definition locale))))
+              (locale-dir #$(and locale (grub-locale-folder grub))))
+          (when locale
+            (format port "\
 # Localization configuration.
-if search --file --set boot_partition /grub/grub.cfg; then
-    set locale_dir=(${boot_partition})/grub/locale
-else
-    set locale_dir=/boot/grub/locale
-fi
-set lang=~a~%" locale))))
+search --file --set ~a
+set locale_dir=~a
+set lang=~a~%"
+                    (string-append locale-dir "/es@quot.mo")
+                    locale-dir
+                    locale)))))
 
   (define keyboard-layout-config
     (let* ((layout (bootloader-configuration-keyboard-layout config))
-- 
2.28.0