modules/networking: init with vstub from backbone-routing

hosts/VEGAS/services/backbone-routing/default.nix

@@ -1,4 +1,4 @@
-{ config, depot, ... }:
+{ depot, ... }:
 let
   inherit (depot.reflection) interfaces;
 in
@@ -16,14 +16,4 @@ in
       "10.10.0.0/16"
     ];
   };
-
-  networking.interfaces.${interfaces.vstub.link} = {
-    virtual = true;
-    ipv4.addresses = [
-      {
-        address = interfaces.vstub.addr;
-        prefixLength = 32;
-      }
-    ];
-  };
 }

modules/networking/default.nix

@@ -0,0 +1,17 @@
+{ depot, lib, ... }:
+let
+  inherit (depot.reflection) interfaces;
+in
+{
+  networking.interfaces = lib.mkIf (interfaces ? vstub) {
+    ${interfaces.vstub.link} = {
+      virtual = true;
+      ipv4.addresses = [
+        {
+          address = interfaces.vstub.addr;
+          prefixLength = 32;
+        }
+      ];
+    };
+  };
+}

modules/part.nix

@@ -22,6 +22,7 @@ in
     maintenance = ./maintenance;
     minimal = ./minimal;
     motd = ./motd;
+    networking = ./networking;
     nix-builder = ./nix-builder;
     nix-config-server = ./nix-config/server.nix;
     nix-register-flakes = ./nix-register-flakes;
@@ -54,6 +55,7 @@ in
       external-storage
       fail2ban
       motd
+      networking
       nix-config-server
       system-info
       system-recovery