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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.virtualisation.googleComputeImage;
defaultConfigFile = pkgs.writeText "configuration.nix" ''
{ ... }:
{
imports = [
<nixpkgs/nixos/modules/virtualisation/google-compute-image.nix>
];
}
'';
in
{
imports = [ ./google-compute-config.nix ];
options = {
virtualisation.googleComputeImage.diskSize = mkOption {
type = with types; either (enum [ "auto" ]) int;
default = "auto";
example = 1536;
description = ''
Size of disk image. Unit is MB.
'';
};
virtualisation.googleComputeImage.configFile = mkOption {
type = with types; nullOr str;
default = null;
description = ''
A path to a configuration file which will be placed at `/etc/nixos/configuration.nix`
and be used when switching to a new configuration.
If set to `null`, a default configuration is used, where the only import is
`<nixpkgs/nixos/modules/virtualisation/google-compute-image.nix>`.
'';
};
};
#### implementation
config = {
system.build.googleComputeImage = import ../../lib/make-disk-image.nix {
name = "google-compute-image";
postVM = ''
PATH=$PATH:${with pkgs; lib.makeBinPath [ gnutar gzip ]}
pushd $out
mv $diskImage disk.raw
tar -Szcf nixos-image-${config.system.nixos.label}-${pkgs.stdenv.hostPlatform.system}.raw.tar.gz disk.raw
rm $out/disk.raw
popd
'';
format = "raw";
configFile = if cfg.configFile == null then defaultConfigFile else cfg.configFile;
inherit (cfg) diskSize;
inherit config lib pkgs;
};
};
}
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