add wg support

flake.nix

@@ -57,6 +57,7 @@
 
       mkSharedModules = pkgs: pkgs-unstable: [
         ./nixos/modules/base.nix
+        ./nixos/modules/services/wireguard-peer.nix
         inputs.home-manager.nixosModules.home-manager
         ({ ... }: {
           home-manager.useGlobalPkgs = true;

home/modules/programs/waybar/default.nix

@@ -1,8 +1,9 @@
-{ pkgs, ... }:
+{ pkgs, repoRoot, ... }:
 let
   commands = import ../../../../lib/commands.nix { inherit pkgs; };
   inherit (commands) uwsm term;
   height = 20;
+  wireguardToggle = "${pkgs.xonsh}/bin/xonsh ${repoRoot}/util/toggle_wg.xsh";
 in
 {
   imports = [
@@ -37,6 +38,7 @@ in
           "clock"
           "sway/language"
           "network"
+          "custom/wireguard"
           "bluetooth"
           "pulseaudio"
           "idle_inhibitor"
@@ -53,7 +55,7 @@ in
         spacing = 8;
       };
       idle_inhibitor = {
-        format = "| {icon}";
+        format = "| {icon} ";
         start-activated = true;
         format-icons = {
           activated = "🫨";
@@ -61,7 +63,7 @@ in
         };
       };
       "sway/language" = {
-        format = "| {short}";
+        format = "| {short} ";
         tooltip-format = "{long}";
       };
       clock = {
@@ -72,29 +74,36 @@ in
       };
       battery = {
         interval = 60;
-        format = "| {capacity}%";
+        format = "| {capacity}% ";
         format-charging = "| ch:{capacity}%";
       };
       network = {
         tooltip-format = "{ifname} = {ipaddr}/{cidr}";
-        format-wifi = "| w:{ipaddr}";
-        format-ethernet = "| e:{ipaddr}";
-        format-linked = "| l:{ipaddr}";
-        format-disconnected = "| d";
+        format-wifi = "| w:{essid} ";
+        format-ethernet = "| e:{ipaddr} ";
+        format-linked = "| l:{ipaddr} ";
+        format-disconnected = "| d ";
         interval = 15;
         on-click = "${uwsm} ${term} -e nmtui";
       };
+      "custom/wireguard" = {
+        exec = "${wireguardToggle} status";
+        on-click = "${wireguardToggle} toggle";
+        format = "| wg:{text} ";
+        interval = 15;
+        tooltip = false;
+      };
       bluetooth = {
-        format = "| bt:{num_connections}";
+        format = "| bt:{num_connections} ";
         format-disabled = "";
         format-no-controller = "";
         interval = 15;
         on-click = "${uwsm} ${term} -e bluetui";
       };
       pulseaudio = {
-        format = "| snd{volume}%";
-        format-muted = "| snd:-";
-        format-bluetooth = "| snd(bt):{volume}%";
+        format = "| snd{volume}% ";
+        format-muted = "| snd:- ";
+        format-bluetooth = "| snd(bt):{volume}% ";
         on-click = "${uwsm} pavucontrol";
       };
     };

nixos/modules/profiles/workstation.nix

@@ -24,6 +24,8 @@ in
 
   security.sudo.wheelNeedsPassword = false;
 
+  alisceon.wireguardPeer.enable = true;
+
   services = {
     printing.enable = true;
     pulseaudio.enable = false;

nixos/modules/services/wireguard-peer.nix

@@ -0,0 +1,57 @@
+{ config, lib, pkgs, repoLocalPath, ... }:
+
+let
+  cfg = config.alisceon.wireguardPeer;
+in
+{
+  options.alisceon.wireguardPeer = {
+    enable = lib.mkEnableOption "a single WireGuard peer managed by wg-quick";
+
+    interface = lib.mkOption {
+      type = lib.types.str;
+      default = "wg0";
+      description = "WireGuard interface name.";
+    };
+
+    configFile = lib.mkOption {
+      type = lib.types.str;
+      default = "/etc/wireguard/${cfg.interface}.conf";
+      defaultText = "/etc/wireguard/<interface>.conf";
+      description = ''
+        Path to an external wg-quick config file. Keep it root-owned and mode
+        0600 so private keys and peer material stay outside Git and the Nix store.
+      '';
+    };
+
+    autostart = lib.mkOption {
+      type = lib.types.bool;
+      default = true;
+      description = "Whether to bring the WireGuard interface up at boot.";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    assertions = [
+      {
+        assertion = lib.hasPrefix "/" cfg.configFile;
+        message = "alisceon.wireguardPeer.configFile must be an absolute path outside the repo.";
+      }
+      {
+        assertion = !(lib.hasPrefix repoLocalPath cfg.configFile);
+        message = "alisceon.wireguardPeer.configFile must be outside ${repoLocalPath}.";
+      }
+    ];
+
+    networking.wg-quick.interfaces.${cfg.interface} = {
+      inherit (cfg) autostart configFile;
+    };
+
+    systemd.services."wg-quick-${cfg.interface}".unitConfig.ConditionPathExists = cfg.configFile;
+
+    environment.systemPackages = [ pkgs.wireguard-tools ];
+
+    systemd.tmpfiles.rules = [
+      "d /etc/wireguard 0700 root root -"
+    ];
+  };
+}

util/toggle_wg.xsh

@@ -0,0 +1,25 @@
+import sys
+
+isup = "does not exist." not in $(ip link show dev wg0 2>&1)
+
+try:
+    match sys.argv[1]:
+        case "toggle":
+            if isup:
+                footclient wg-quick down wg0
+            else:
+                footclient wg-quick up wg0
+        case "status":
+            if isup:
+                print("u")
+            else:
+                print("d")
+        case _:
+            raise RuntimeError
+
+except (RuntimeError, IndexError):
+    print('"toggle" or "status" must be provided')
+    exit(1)
+
+exit(0)
+