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authorLudovic Courtès <ludo@gnu.org>2016-11-30 00:05:22 +0100
committerLudovic Courtès <ludo@gnu.org>2016-11-30 17:35:20 +0100
commit130079ae27b47228516dc2934bcdecca5dbedf12 (patch)
treee56b3a783bace65282da47730806250443362527 /gnu/tests
parentdcd9d1637a90375756c97019cc456b6f948b5d2f (diff)
tests: Create a copy-on-write image instead of copying eagerly.
* gnu/tests/install.scm (qemu-command/writable-image): Invoke 'qemu-img -o backing_file' instead of calling 'copy-file'.
Diffstat (limited to 'gnu/tests')
-rw-r--r--gnu/tests/install.scm11
1 files changed, 9 insertions, 2 deletions
diff --git a/gnu/tests/install.scm b/gnu/tests/install.scm
index ecf1ac1923..4779b80e94 100644
--- a/gnu/tests/install.scm
+++ b/gnu/tests/install.scm
@@ -199,8 +199,15 @@ IMAGE, a disk image. The QEMU VM is has access to MEMORY-SIZE MiB of RAM."
(mlet %store-monad ((system (current-system)))
(return #~(let ((image #$image))
;; First we need a writable copy of the image.
- (format #t "copying image '~a'...~%" image)
- (copy-file image "disk.img")
+ (format #t "creating writable image from '~a'...~%" image)
+ (unless (zero? (system* #+(file-append qemu-minimal
+ "/bin/qemu-img")
+ "create" "-f" "qcow2"
+ "-o"
+ (string-append "backing_file=" image)
+ "disk.img"))
+ (error "failed to create writable QEMU image" image))
+
(chmod "disk.img" #o644)
`(,(string-append #$qemu-minimal "/bin/"
#$(qemu-command system))