vm: Support creating FAT partitions.

* gnu/build/vm.scm (create-ext-file-system, create-fat-file-system): New procedures.
(format-partition): Use them. Error for unknown file systems.
* gnu/system/vm.scm (qemu-image): Include DOSFSTOOLS.
* gnu/system/linux-initrd.scm (base-initrd): Always add nls_is8859-1.ko.

1 files changed, 26 insertions, 4 deletions

diff --git a/gnu/build/vm.scm b/gnu/build/vm.scm
index 00d625c946..ef8dcc315f 100644
--- a/gnu/build/vm.scm
+++ b/gnu/build/vm.scm
@@ -213,10 +213,10 @@ actual /dev name based on DEVICE."
 
 (define MS_BIND 4096)                             ; <sys/mounts.h> again!
 
-(define* (format-partition partition type
-                           #:key label)
-  "Create a file system TYPE on PARTITION.  If LABEL is true, use that as the
-volume name."
+(define* (create-ext-file-system partition type
+                                 #:key label)
+  "Create an ext-family filesystem of TYPE on PARTITION.  If LABEL is true,
+use that as the volume name."
   (format #t "creating ~a partition...\n" type)
   (unless (zero? (apply system* (string-append "mkfs." type)
                         "-F" partition
@@ -225,6 +225,28 @@ volume name."
                             '())))
     (error "failed to create partition")))
 
+(define* (create-fat-file-system partition
+                                 #:key label)
+  "Create a FAT filesystem on PARTITION.  The number of File Allocation Tables
+will be determined based on filesystem size.  If LABEL is true, use that as the
+volume name."
+  (format #t "creating FAT partition...\n")
+  (unless (zero? (apply system* "mkfs.fat" partition
+                        (if label
+                            `("-n" ,label)
+                            '())))
+    (error "failed to create FAT partition")))
+
+(define* (format-partition partition type
+                           #:key label)
+  "Create a file system TYPE on PARTITION.  If LABEL is true, use that as the
+volume name."
+  (cond ((string-prefix? "ext" type)
+         (create-ext-file-system partition type #:label label))
+        ((or (string-prefix? "fat" type) (string= "vfat" type))
+         (create-fat-file-system partition #:label label))
+        (else (error "Unsupported file system."))))
+
 (define (initialize-partition partition)
   "Format PARTITION, a <partition> object with a non-#f 'device' field, mount
 it, run its initializer, and unmount it."