Restructure repo

modules/nixos/nix.nix

@@ -0,0 +1,58 @@
+# Nix configuration for NixOS
+{
+  config,
+  inputs,
+  ...
+}:
+let
+  autoGarbageCollector = config.var.autoGarbageCollector;
+in
+{
+  security.sudo.extraRules = [
+    {
+      users = [ config.var.username ];
+      commands = [
+        {
+          command = "/run/current-system/sw/bin/nixos-rebuild";
+          options = [ "NOPASSWD" ];
+        }
+      ];
+    }
+  ];
+  nixpkgs.config.allowUnfree = true;
+  nix = {
+    nixPath = [ "nixpkgs=${inputs.nixpkgs}" ];
+    channel.enable = false;
+    extraOptions = ''
+      warn-dirty = false
+    '';
+    settings = {
+      download-buffer-size = 262144000; # 250 MB (250 * 1024 * 1024)
+      auto-optimise-store = true;
+      trusted-users = [ config.var.username ]; # Allows remote nixos-rebuild to vps
+      experimental-features = [
+        "nix-command"
+        "flakes"
+      ];
+      substituters = [
+        # high priority since it's almost always used
+        "https://cache.nixos.org?priority=10"
+
+        "https://hyprland.cachix.org"
+        "https://nix-community.cachix.org"
+        "https://numtide.cachix.org"
+      ];
+      trusted-public-keys = [
+        "hyprland.cachix.org-1:a7pgxzMz7+chwVL3/pzj6jIBMioiJM7ypFP8PwtkuGc="
+        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+        "numtide.cachix.org-1:2ps1kLBUWjxIneOy1Ik6cQjb41X0iXVXeHigGmycPPE="
+      ];
+    };
+    gc = {
+      automatic = autoGarbageCollector;
+      persistent = true;
+      dates = "weekly";
+      options = "--delete-older-than 7d";
+    };
+  };
+}