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make-disk-image: add compressed option to compress qcow2 images

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This commit is contained in:
Orivej Desh 2017-11-11 19:27:37 +00:00
parent a2d3ee77b8
commit 608de48fe4
1 changed files with 6 additions and 1 deletions
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7
nixos/lib/make-disk-image.nix
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@ -35,11 +35,16 @@
, # Disk image format, one of qcow2, vpc, raw.
format ? "raw"
, # Whether to compress the image, applicable only when the format is qcow2.
compressed ? false
}:
with lib;
let
compress = optionalString compressed (assert format == "qcow2"; "-c");
filename = "nixos." + {
qcow2 = "qcow2";
vpc = "vhd";
@ -136,7 +141,7 @@ in pkgs.vmTools.runInLinuxVM (
${if format == "raw" then ''
mv $diskImage $out/${filename}
'' else ''
${pkgs.qemu}/bin/qemu-img convert -f raw -O ${format} $diskImage $out/${filename}
${pkgs.qemu}/bin/qemu-img convert -f raw -O ${format} ${compress} $diskImage $out/${filename}
''}
diskImage=$out/${filename}
${postVM}