feat: Add iso and lxc generation artifacts

artifacts.nix

@@ -0,0 +1,73 @@
+{ inputs, hosts, self, system }:
+let
+  nixpkgs = inputs.nixpkgs;
+  lib = nixpkgs.lib;
+  nixos-generators = inputs.nixos-generators;
+
+  mkInstaller = hostName:
+    let
+      targetConfig = self.nixosConfigurations.${hostName}.config;
+      targetSystem = targetConfig.system.build.toplevel;
+      diskoScript = targetConfig.system.build.diskoScript;
+    in
+    nixpkgs.lib.nixosSystem {
+      inherit system;
+      specialArgs = {
+        inherit inputs hostName targetSystem diskoScript;
+        hostPlatform = system;
+      };
+      modules = [
+        "${nixpkgs}/nixos/modules/installer/cd-dvd/installation-cd-minimal.nix"
+        inputs.disko.nixosModules.disko
+        ./installer/auto-install.nix
+      ];
+    };
+
+  mkGenerator = hostName: format:
+    nixos-generators.nixosGenerate {
+      inherit system;
+      specialArgs = { inherit inputs; };
+      modules = hosts.modules.${hostName} ++ [
+        {
+          disko.enableConfig = lib.mkForce false;
+          services.upower.enable = lib.mkForce false;
+        }
+      ];
+      inherit format;
+    };
+
+  hostNames = builtins.attrNames hosts.nixosConfigurations;
+
+  installerPackages = lib.listToAttrs (lib.concatMap (name:
+    let cfg = hosts.nixosConfigurations.${name}; in
+    if lib.elem "iso" cfg.config.host.buildMethods then [{
+      name = "installer-iso-${name}";
+      value = (mkInstaller name).config.system.build.isoImage;
+    }] else []
+  ) hostNames);
+
+  lxcPackages = lib.listToAttrs (lib.concatMap (name:
+    let cfg = hosts.nixosConfigurations.${name}; in
+    if lib.elem "lxc" cfg.config.host.buildMethods then [{
+      name = "lxc-${name}";
+      value =
+        if cfg.config.boot.isContainer then
+          cfg.config.system.build.tarball
+        else
+          mkGenerator name "lxc";
+    }] else []
+  ) hostNames);
+
+  proxmoxPackages = lib.listToAttrs (lib.concatMap (name:
+    let cfg = hosts.nixosConfigurations.${name}; in
+    if lib.elem "proxmox" cfg.config.host.buildMethods then [{
+      name = "proxmox-${name}";
+      value =
+        if cfg.config.boot.isContainer then
+          cfg.config.system.build.tarball
+        else
+          mkGenerator name "proxmox";
+    }] else []
+  ) hostNames);
+in
+installerPackages // lxcPackages // proxmoxPackages