pkgs/vlan-report: add

nix/pkgs/default.nix

@@ -92,9 +92,14 @@ let
   subnetplans = import ./subnetplans.nix {
     inherit self nixpkgs system;
   };
+
+  vlan-report = import ./vlan-report.nix {
+    inherit self nixpkgs system;
+  };
 in
 rootfs-packages // vm-packages // device-templates // network-graphs // network-cypher-graphs // starlink // subnetplans // {
   inherit all-rootfs export-openwrt-models export-config dns-slaves
     encrypt-secrets decrypt-secrets switch-to-production
+    vlan-report
     ;
 }

nix/pkgs/vlan-report.nix

@@ -0,0 +1,22 @@
+{ self, nixpkgs, system }:
+with nixpkgs.legacyPackages.${system};
+let
+  config = self.lib.config;
+in
+writeText "vlan-report.txt" (
+  lib.concatMapStrings (net: ''
+    ## ${net}${lib.optionalString (config.site.net.${net}.vlan != null) " (VLAN ${toString config.site.net.${net}.vlan})"}
+    ${lib.concatStringsSep "\n" (
+      lib.concatMap (host:
+        map (target: "- ${host} -> ${target}") (
+          builtins.attrNames (
+            lib.filterAttrs (_: { nets, ... }:
+              lib.elem net nets
+            ) config.site.hosts.${host}.links
+          )
+        )
+      ) (lib.attrNames config.site.hosts)
+    )}
+
+  '') (lib.attrNames config.site.net)
+)