improved rebuild script

modules/programs/home/zsh/scripts/rebuild.sh

@@ -2,12 +2,15 @@
 
 current_dir=$(pwd)
 
-cd ~/nix
+cd ~/nix || exit
+
+git fetch
+
+if git diff --quiet HEAD..origin/main; then
+    echo "No changes detected in the remote. Proceeding with rebuild..."
 
     git add .
 
-alejandra .
-
     hostname=$(hostname)
 
     if echo "$hostname" | grep -q 'desktop'; then
@@ -19,5 +22,10 @@ elif echo "$hostname" | grep -q 'server'; then
     elif echo "$hostname" | grep -q 'localhost'; then
         nix-on-droid switch --flake ~/nix
     fi
+else
+    echo "Changes detected in the remote. Stopping execution."
+    git diff HEAD..origin/main
+    exit 1
+fi
 
-cd "$current_dir"
+cd "$current_dir" || exit