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71 lines
1.9 KiB
71 lines
1.9 KiB
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.virtualisation.googleComputeImage;
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defaultConfigFile = pkgs.writeText "configuration.nix" ''
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{ ... }:
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{
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imports = [
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<nixpkgs/nixos/modules/virtualisation/google-compute-image.nix>
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];
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}
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'';
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in
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{
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imports = [ ./google-compute-config.nix ];
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options = {
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virtualisation.googleComputeImage.diskSize = mkOption {
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type = with types; either (enum [ "auto" ]) int;
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default = "auto";
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example = 1536;
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description = ''
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Size of disk image. Unit is MB.
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'';
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};
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virtualisation.googleComputeImage.configFile = mkOption {
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type = with types; nullOr str;
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default = null;
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description = ''
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A path to a configuration file which will be placed at `/etc/nixos/configuration.nix`
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and be used when switching to a new configuration.
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If set to `null`, a default configuration is used, where the only import is
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`<nixpkgs/nixos/modules/virtualisation/google-compute-image.nix>`.
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'';
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};
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virtualisation.googleComputeImage.compressionLevel = mkOption {
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type = types.int;
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default = 6;
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description = ''
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GZIP compression level of the resulting disk image (1-9).
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'';
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};
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};
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#### implementation
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config = {
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system.build.googleComputeImage = import ../../lib/make-disk-image.nix {
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name = "google-compute-image";
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postVM = ''
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PATH=$PATH:${with pkgs; lib.makeBinPath [ gnutar gzip ]}
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pushd $out
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mv $diskImage disk.raw
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tar -Sc disk.raw | gzip -${toString cfg.compressionLevel} > \
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nixos-image-${config.system.nixos.label}-${pkgs.stdenv.hostPlatform.system}.raw.tar.gz
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rm $out/disk.raw
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popd
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'';
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format = "raw";
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configFile = if cfg.configFile == null then defaultConfigFile else cfg.configFile;
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inherit (cfg) diskSize;
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inherit config lib pkgs;
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};
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};
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}
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