add home activation script

modules/applications/nautilus.nix

@@ -5,7 +5,7 @@
     home-manager.users.${config.user} = {
       home.packages = with pkgs; [
         gnome.nautilus
-        gnome.sushi # Quick preview
+        gnome.sushi # Quick preview with spacebar
       ];
     };
   };

modules/editor/dotfiles.nix

@@ -0,0 +1,19 @@
+{ config, pkgs, lib, ... }: {
+
+  home-manager.users.${config.user} = {
+
+    home.activation = {
+
+      # Always clone dotfiles repository if it doesn't exist
+      cloneDotfiles = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
+        if [ ! -d "${config.dotfilesPath}" ]; then
+            $DRY_RUN_CMD mkdir --parents $VERBOSE_ARG $(dirname ${config.dotfilesPath})
+            $DRY_RUN_CMD ${pkgs.git}/bin/git clone https://github.com/nmasur/dotfiles ${config.dotfilesPath}
+        fi
+      '';
+
+    };
+
+  };
+
+}