feat: allow microvms to override configPath

hosts/common/core/default.nix

@@ -10,6 +10,8 @@
     ./system.nix
     ./xdg.nix
 
+    ../../../users/root
+
     ../../../modules/interface-naming.nix
     ../../../modules/microvms.nix
     ../../../modules/wireguard.nix
@@ -22,6 +24,13 @@
     verbose = true;
   };
 
+  # If the host defines microvms, ensure that this core module and
+  # some boilerplate is imported automatically.
+  extra.microvms.commonImports = [
+    ./.
+    {home-manager.users.root.home.minimal = true;}
+  ];
+
   # Required even when using home-manager's zsh module since the /etc/profile load order
   # is partly controlled by this. See nix-community/home-manager#3681.
   programs.zsh.enable = true;

hosts/nom/default.nix

@@ -22,7 +22,6 @@
     ../common/yubikey.nix
     ../common/zfs.nix
 
-    ../../users/root
     ../../users/myuser
 
     ./fs.nix

hosts/ward/default.nix

@@ -15,8 +15,6 @@
     ../common/efi.nix
     ../common/zfs.nix
 
-    ../../users/root
-
     ./fs.nix
     ./net.nix
   ];
@@ -35,15 +33,22 @@
     };
   in {
     test = defineVm 11;
+
+    #nginx = defineVm 12;
+    #kanidm = defineVm 13;
+    #gitea = defineVm 14;
+    #vaultwarden = defineVm 15;
+    #samba = defineVm 16;
+    #fasten-health = defineVm 17;
+    #immich = defineVm 18;
+    #paperless = defineVm 19;
+
+    #kanidm = defineVm 12 // {
+    #  configPath = ./vm-test.nix;
+    #};
   };
 
   microvm.vms.test.config = {
-    imports = [
-      ../common/core
-      ../../users/root
-    ];
-
-    home-manager.users.root.home.minimal = true;
     rekey.hostPubkey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBXXjI6uB26xOF0DPy/QyLladoGIKfAtofyqPgIkCH/g";
   };
 }

hosts/zackbiene/default.nix

@@ -13,8 +13,6 @@
     #../common/initrd-ssh.nix
     ../common/zfs.nix
 
-    ../../users/root
-
     ./fs.nix
     ./net.nix