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Allow generating image using existing nixosSystem #246

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Allow generating image using existing nixosSystem #246

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37 changes: 20 additions & 17 deletions flake.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -38,6 +38,7 @@
specialArgs ? {},
modules ? [],
customFormats ? {},
nixosSystem ? null
}: let
extraFormats =
lib.mapAttrs' (
Expand All @@ -50,23 +51,25 @@
})
)
customFormats;
formatModule = builtins.getAttr format (self.nixosModules // extraFormats);
image = nixpkgs.lib.nixosSystem {
inherit pkgs specialArgs;
system =
if system != null
then system
else pkgs.system;
lib =
if lib != null
then lib
else pkgs.lib;
modules =
[
formatModule
]
++ modules;
};
formatModule = builtins.getAttr format (self.nixosModules // extraFormats);
image = if nixosSystem != null
then nixosSystem.extendModules { modules = [ formatModule ] ++ modules; }
else nixpkgs.lib.nixosSystem {
inherit pkgs specialArgs;
system =
if system != null
then system
else pkgs.system;
lib =
if lib != null
then lib
else pkgs.lib;
modules =
[
formatModule
]
++ modules;
};
in
image.config.system.build.${image.config.formatAttr};
}
Expand Down