nixos,networking: add myFlake.nixos.networking.dns

flake.nix

@@ -171,7 +171,6 @@
           ./nixos/presets/desktop.nix
           ./nixos/presets/core/zram-generator.nix
           ./nixos/presets/core/boot/no-bootloader-menu.nix
-          ./nixos/presets/core/networking/alidns.nix
           ./nixos/presets/desktop/gaming.nix
           ./nixos/presets/desktop/virtualbox.nix
           ./nixos/presets/desktop/wayland.nix
@@ -185,11 +184,14 @@
           ./machines/nixos/81fw-lenovo-legion-y7000/machine-1
 
           {
-            # extra home-manager stuff
-            home-manager.users.guanranwang = import ./users/guanranwang/home-manager/nixos/presets/desktop/gaming.nix;
-
             networking.hostName = "81FW-NixOS"; # Hostname
             time.timeZone = "Asia/Shanghai"; # Timezone
+
+            ### Home-Manager
+            home-manager.users.guanranwang = import ./users/guanranwang/home-manager/nixos/presets/desktop/gaming.nix;
+
+            ### Options
+            myFlake.nixos.networking.dns = "alidns";
           }
         ];
       };

nixos/networking/dns.nix

@@ -1,9 +1,29 @@
-{...}: {
-  networking.nameservers = [
+{
+  lib,
+  config,
+  ...
+}: {
+  options.myFlake.nixos.networking.dns = lib.mkOption {
+    type = lib.types.string;
+    default = "google";
+    example = "alidns";
+    description = "Select your DNS provider";
+  };
+
+  config.networking.nameservers = lib.mkMerge [
+    (lib.mkIf (config.myFlake.nixos.networking.dns == "google") [
       ### Google DNS
       "8.8.8.8"
       "8.8.4.4"
       "2001:4860:4860::8888"
       "2001:4860:4860::8844"
+    ])
+    (lib.mkIf (config.myFlake.nixos.networking.dns == "alidns") [
+      ### AliDNS
+      "223.5.5.5"
+      "223.6.6.6"
+      "2400:3200::1"
+      "2400:3200:baba::1"
+    ])
   ];
 }

nixos/presets/core/networking/alidns.nix

@@ -1,9 +0,0 @@
-{lib, ...}: {
-  networking.nameservers = lib.mkForce [
-    ### AliDNS
-    "223.5.5.5"
-    "223.6.6.6"
-    "2400:3200::1"
-    "2400:3200:baba::1"
-  ];
-}