nixos/prometheus-wireguard-exporter: add support for new flags

nixos/modules/services/monitoring/prometheus/exporters/wireguard.nix

@@ -15,16 +15,18 @@ let
     mkEnableOption
     optionalString
     escapeShellArg
+    concatStringsSep
+    concatMapStringsSep
     ;
 in
 {
   port = 9586;
   imports = [
     (mkRenamedOptionModule [ "addr" ] [ "listenAddress" ])
-    ({
+    {
       options.warnings = options.warnings;
       options.assertions = options.assertions;
-    })
+    }
   ];
   extraOpts = {
     verbose = mkEnableOption "verbose logging mode for prometheus-wireguard-exporter";
@@ -44,6 +46,15 @@ in
       '';
     };
 
+    interfaces = mkOption {
+      type = types.listOf types.str;
+      default = [ ];
+      description = ''
+        Specifies the interface(s) passed to the wg show <interface> dump parameter.
+        By default all interfaces are used.
+      '';
+    };
+
     singleSubnetPerField = mkOption {
       type = types.bool;
       default = false;
@@ -70,6 +81,14 @@ in
         Adds the `wireguard_latest_handshake_delay_seconds` metric that automatically calculates the seconds passed since the last handshake.
       '';
     };
+
+    prependSudo = mkOption {
+      type = types.bool;
+      default = false;
+      description = ''
+        Whether or no to prepend sudo to wg commands.
+      '';
+    };
   };
   serviceOpts = {
     path = [ pkgs.wireguard-tools ];
@@ -85,7 +104,10 @@ in
           ${optionalString cfg.singleSubnetPerField "-s true"} \
           ${optionalString cfg.withRemoteIp "-r true"} \
           ${optionalString cfg.latestHandshakeDelay "-d true"} \
-          ${optionalString (cfg.wireguardConfig != null) "-n ${escapeShellArg cfg.wireguardConfig}"}
+          ${optionalString cfg.prependSudo "-a true"} \
+          ${optionalString (cfg.wireguardConfig != null) "-n ${escapeShellArg cfg.wireguardConfig}"} \
+          ${concatMapStringsSep " " (i: "-i ${i}") cfg.interfaces} \
+          ${concatStringsSep " " cfg.extraFlags}
       '';
       RestrictAddressFamilies = [
         # Need AF_NETLINK to collect data