image: Add qcow2-gpt image type.

qcow2 is a mbr-hybrid image. But on aarch64, we
have to use grub-efi bootloader. For that bootloader,
gpt should be used and Guix errors if it isn't (due to
failed check in Guix code). So it's impossible to generate
qcow2 type aarch64 image without using customized bootloader.
One would have to define their own image instead of using
the ones pre-defined.

* gnu/system/system.scm (qcow2-gpt-image-type): New variable.
* doc/guix.texi: Document qcow2-gpt and its use.

Change-Id: I93f0880c7ca2d3f934067c12dd1143ad20828333
Signed-off-by: Rutherther <rutherther@ditigal.xyz>

1 files changed, 11 insertions, 0 deletions

diff --git a/gnu/system/image.scm b/gnu/system/image.scm
index 9e9b7cbba47..de975360ae9 100644
--- a/gnu/system/image.scm
+++ b/gnu/system/image.scm
@@ -98,6 +98,7 @@
             efi-raw-image-type
             efi32-raw-image-type
             qcow2-image-type
+            qcow2-gpt-image-type
             iso-image-type
             uncompressed-iso-image-type
             docker-image-type
@@ -265,6 +266,16 @@ set to the given OS."
                   (format 'compressed-qcow2))
                  <>))))
 
+(define qcow2-gpt-image-type
+  (image-type
+   (name 'qcow2-gpt)
+   (constructor (cut image-with-os
+                 (image
+                  (inherit efi-disk-image)
+                  (name 'image.qcow2)
+                  (format 'compressed-qcow2))
+                 <>))))
+
 (define iso-image-type
   (image-type
    (name 'iso9660)