nixos: move shared modules to common

nix/nixosModules/common/home-manager.nix

@@ -0,0 +1,6 @@
+{
+  home-manager = {
+    useGlobalPkgs = true;
+    useUserPackages = true;
+  };
+}

nix/nixosModules/common/sudo-conf.nix

@@ -0,0 +1,23 @@
+{ pkgs, ... }:
+
+{
+  security.sudo.extraConfig = ''
+    Defaults        lecture = always
+    Defaults        lecture_file = ${pkgs.writeText "sudo_lecture_file" ''
+      λλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλ
+
+           λλλλ
+             λλλ
+              λλλ
+               λλλ                       Beep Boop
+                λλλ               Are you sure about this?
+              λ  λλλ                  Think twice :3
+             λ    λλλ
+            λ      λλλ
+           λ        λλλ
+          λ          λλλλ
+
+      λλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλλ
+    ''}
+  '';
+}

nix/nixosModules/common/system-nixconf.nix

@@ -0,0 +1,34 @@
+{ lib, pkgs, ... }:
+
+{
+
+  nix = {
+    package = lib.mkDefault pkgs.nix;
+
+    settings = {
+      extra-substituters = [
+        "https://nix-community.cachix.org"
+        "https://leana8959.cachix.org"
+      ];
+      extra-trusted-substituters = [
+        "https://nix-community.cachix.org"
+        "https://leana8959.cachix.org"
+      ];
+      extra-trusted-public-keys = [
+        "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+        "leana8959.cachix.org-1:CxQSAp8lcgMv8Me459of0jdXRW2tcyeYRKTiiUq8z0M="
+      ];
+
+      experimental-features = [
+        "nix-command"
+        "flakes"
+      ];
+
+      allow-import-from-derivation = true;
+
+      sandbox = true;
+    };
+
+  };
+
+}

nix/nixosModules/common/unfree-predicate.nix

@@ -0,0 +1,20 @@
+{ lib, ... }:
+
+{
+  nixpkgs.config.allowUnfreePredicate =
+    pkg:
+    builtins.elem (lib.getName pkg) [
+      "discord"
+      "languagetool"
+
+      "brscan5"
+      "brscan5-etc-files"
+
+      "steam"
+      "steam-original"
+      "steam-run"
+
+      "vscode"
+      "code"
+    ];
+}