nixpkgs/nixos/modules/image/images.nix
phaer 08b9155e20 image/images: init
A new NixOS module that adds two new options to `system.build`:

- imageModules: An attrset mapping image variant names to a list of nixos
  modules to use when building such images.

- images: An attrset mapping image variant names to a nixos instance
  based on the current config plus variant-specific modules (see
  `system.build.imageModules` above.
2024-11-26 19:04:53 +01:00

57 lines
1.3 KiB
Nix

{
config,
lib,
pkgs,
extendModules,
...
}:
let
inherit (lib) types;
imageModules = { };
imageConfigs = lib.mapAttrs (
name: modules:
extendModules {
inherit modules;
}
) config.image.modules;
in
{
options = {
system.build = {
images = lib.mkOption {
type = types.lazyAttrsOf types.raw;
readOnly = true;
description = ''
Different target images generated for this NixOS configuration.
'';
};
};
image.modules = lib.mkOption {
type = types.attrsOf (types.listOf types.deferredModule);
description = ''
image-specific NixOS Modules used for `system.build.images`.
'';
};
};
config.image.modules = lib.mkIf (!config.system.build ? image) imageModules;
config.system.build.images = lib.mkIf (!config.system.build ? image) (
lib.mapAttrs (
name: nixos:
let
inherit (nixos) config;
inherit (config.image) filePath;
builder =
config.system.build.image
or (throw "Module for `system.build.images.${name}` misses required `system.build.image` option.");
in
lib.recursiveUpdate builder {
passthru = {
inherit config filePath;
};
}
) imageConfigs
);
}