chore: move topology wireguard to extra modules

modules/default.nix

@@ -39,7 +39,6 @@
     ./provided-domains.nix
     ./secrets.nix
     ./telegraf.nix
-    ./topology-wireguard.nix
   ];
 
   nixpkgs.overlays = [

modules/topology-wireguard.nix

@@ -1,80 +0,0 @@
-{
-  config,
-  lib,
-  inputs ? {},
-  ...
-}: let
-  inherit
-    (lib)
-    flip
-    mapAttrsToList
-    mkDefault
-    mkEnableOption
-    mkIf
-    mkMerge
-    filter
-    ;
-
-  headOrNull = xs:
-    if xs == []
-    then null
-    else builtins.head xs;
-
-  networkId = wgName: "wireguard-${wgName}";
-in {
-  options.topology.extractors.wireguard.enable = mkEnableOption "topology wireguard extractor" // {default = true;};
-
-  config = mkIf (config.topology.extractors.wireguard.enable && config ? wireguard) {
-    # Create networks (this will be duplicated by each node,
-    # but it doesn't matter and will be merged anyway)
-    topology.networks = mkMerge (
-      flip mapAttrsToList config.wireguard (
-        wgName: _: let
-          inherit (lib.wireguard inputs wgName) networkCidrs;
-        in {
-          ${networkId wgName} = {
-            name = mkDefault "Wireguard network '${wgName}'";
-            icon = "interfaces.wireguard";
-            cidrv4 = headOrNull (filter lib.net.ip.isv4 networkCidrs);
-            cidrv6 = headOrNull (filter lib.net.ip.isv6 networkCidrs);
-          };
-        }
-      )
-    );
-
-    # Assign network and physical connections to related interfaces
-    topology.self.interfaces = mkMerge (
-      flip mapAttrsToList config.wireguard (
-        wgName: wgCfg: let
-          inherit
-            (lib.wireguard inputs wgName)
-            participatingServerNodes
-            wgCfgOf
-            ;
-
-          isServer = wgCfg.server.host != null;
-          filterSelf = filter (x: x != config.node.name);
-
-          # The list of peers that are "physically" connected in the wireguard network,
-          # meaning they communicate directly with each other.
-          connectedPeers =
-            if isServer
-            then
-              # Other servers in the same network
-              filterSelf participatingServerNodes
-            else [wgCfg.client.via];
-        in {
-          ${wgCfg.linkName} = {
-            network = networkId wgName;
-            virtual = true;
-            renderer.hidePhysicalConnections = true;
-            physicalConnections = flip map connectedPeers (peer: {
-              node = inputs.self.nodes.${peer}.config.topology.id;
-              interface = (wgCfgOf peer).linkName;
-            });
-          };
-        }
-      )
-    );
-  };
-}