[nix] mv vm overwrites to host_builder

outputs.nix

@@ -15,86 +15,7 @@ in (utils.lib.eachSystem (builtins.filter filter_system utils.lib.defaultSystems
     pkgs-unstable = nixpkgs-unstable.legacyPackages."${system}";
     pkgs = nixpkgs.legacyPackages."${system}";
 
-    vmMicroVMOverwrites = hostname: options: {
+    utils = import ./machines/modules/host_builder.nix ( inputs // { inherit inputs; self = self; });
-      microvm = {
-        mem = pkgs.lib.mkForce 4096;
-        hypervisor = pkgs.lib.mkForce "qemu";
-        socket = pkgs.lib.mkForce null;
-        shares = pkgs.lib.mkForce ([
-          {
-            tag = "ro-store";
-            source = "/nix/store";
-            mountPoint = "/nix/.ro-store";
-          }
-        ] ++ pkgs.lib.optionals (options.varPath != "") [
-          {
-            source = "${options.varPath}";
-            securityModel = "mapped";
-            mountPoint = "/var";
-            tag = "var";
-          }
-        ]);
-        interfaces = pkgs.lib.mkIf (!options.withNetworking) (pkgs.lib.mkForce [{
-          type = "user";
-          id = "eth0";
-          mac = "02:23:de:ad:be:ef";
-        }]);
-      };
-
-      fileSystems = {
-        "/".fsType = pkgs.lib.mkForce "tmpfs";
-
-        # prometheus uses a memory mapped file which doesnt seem supported by 9p shares
-        # therefore we mount a tmpfs inside the datadir
-        "/var/lib/prometheus2/data" = pkgs.lib.mkIf (hostname == "overwatch" && options.varPath != "") (pkgs.lib.mkForce {
-          fsType = pkgs.lib.mkForce "tmpfs";
-        });
-      };
-
-      boot.isContainer = pkgs.lib.mkForce false;
-      services.timesyncd.enable = false;
-      users.users.root.password = "";
-      services.getty.helpLine = ''
-        Log in as "root" with an empty password.
-        Use "reboot" to shut qemu down.
-      '';
-    };
-
-    vmDiskoOverwrites = {
-      boot.initrd = {
-        secrets = pkgs.lib.mkForce {};
-        network.ssh.enable = pkgs.lib.mkForce false;
-      };
-
-      malobeo.disks.enable = pkgs.lib.mkForce false;
-      networking.hostId = "a3c3101f";
-    };
-
-    vmSopsOverwrites = host: {
-      sops.defaultSopsFile = pkgs.lib.mkForce ./machines/${host}/dummy.yaml;
-
-      environment.etc = {
-        devHostKey = {
-          source = ./machines/secrets/devkey_ed25519;
-          mode = "0600";
-        };
-      };
-
-      services.openssh.hostKeys = [{
-        path = "/etc/devHostKey";
-        type = "ed25519";
-      }];
-    };
-
-    buildVM = host: networking: sopsDummy: disableDisko: varPath: (self.nixosConfigurations.${host}.extendModules {
-        modules = [
-          (vmMicroVMOverwrites host { withNetworking = networking; varPath = "${varPath}"; })
-          (if sopsDummy then (vmSopsOverwrites host) else {})
-          (if disableDisko then vmDiskoOverwrites else {})
-        ] ++ pkgs.lib.optionals (! self.nixosConfigurations.${host}.config ? microvm) [
-          microvm.nixosModules.microvm
-        ];
-      }).config.microvm.declaredRunner;
   in
   {
     devShells.default =
@@ -130,7 +51,7 @@ in (utils.lib.eachSystem (builtins.filter filter_system utils.lib.defaultSystems
       scripts.run-vm = self.packages.${system}.run-vm;
     };
 
-    vmBuilder = buildVM;
+    vmBuilder = utils.buildVM;
 
     packages = {
       docs = pkgs.stdenv.mkDerivation {