feat(modules): move nix settings to a seperate module

machines/calcite/configuration.nix

@@ -9,6 +9,10 @@
       ../sops.nix
     ];
 
+  commonSettings = {
+    nix.enableMirrors = true;
+  };
+
   # Bootloader.
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;
@@ -229,23 +233,6 @@
 
   system.stateVersion = "22.05";
 
-  # Use mirror for binary cache
-  nix.settings.substituters = [
-    "https://mirrors.bfsu.edu.cn/nix-channels/store"
-    "https://mirrors.ustc.edu.cn/nix-channels/store"
-  ];
-  nix.gc = {
-    automatic = true;
-    dates = "weekly";
-    options = "--delete-older-than 30d";
-  };
-  nix.optimise.automatic = true;
-
-  nix.settings = {
-    experimental-features = [ "nix-command" "flakes" ];
-    auto-optimise-store = true;
-    trusted-users = [ "xin" "root" ];
-  };
   nix.extraOptions = ''
     !include "${config.sops.secrets.github_public_token.path}"
   '';

machines/dolomite/default.nix

@@ -79,10 +79,6 @@ in
       wheelNeedsPassword = false;
     };
 
-    nix.settings = {
-      trusted-users = [ "root" ];
-    };
-
     services.sing-box = let
       singTls = {
         enabled = true;

machines/massicot/default.nix

@@ -46,21 +46,6 @@
     git
   ];
 
-  nix.settings = {
-    experimental-features = [ "nix-command" "flakes" ];
-    substituters = "https://cache.garnix.io";
-    trusted-public-keys = "cache.garnix.io:CTFPyKSLcx5RMJKfLo5EEPUObbA78b0YQ2DTCJXqr9g=";
-  };
-
-  nix.gc = {
-    automatic = true;
-    dates = "weekly";
-    options = "--delete-older-than 7d";
-  };
-  nix.optimise.automatic = true;
-  nix.settings.auto-optimise-store = true;
-
-
   system.stateVersion = "22.11";
   
   networking = {

machines/raspite/configuration.nix

@@ -4,6 +4,9 @@
   imports = [
     ./hass.nix
   ];
+
+  commonSettings.nix.enableMirrors = true;
+
   nixpkgs.overlays = [
     # Workaround https://github.com/NixOS/nixpkgs/issues/126755#issuecomment-869149243
     (final: super: {
@@ -18,13 +21,6 @@
     raspberrypi-eeprom
   ];
 
-  # Use mirror for binary cache
-  nix.settings.substituters = [
-    "https://mirrors.bfsu.edu.cn/nix-channels/store"
-    "https://mirrors.ustc.edu.cn/nix-channels/store"
-  ];
-  nix.settings.experimental-features = [ "nix-command" "flakes" ];
-
   system.stateVersion = "24.05";
   
   networking = {
@@ -51,10 +47,6 @@
     wheelNeedsPassword = false;
   };
 
-  nix.settings = {
-    trusted-users = [ "@wheel" ];
-  };
-
   # fileSystems."/".fsType = lib.mkForce "btrfs";
   boot.supportedFilesystems.zfs = lib.mkForce false;