Edited nixos rebuild script

home/scripts/nixswitch.sh

@@ -1,11 +1,33 @@
 #!/usr/bin/env bash
-cd ~/nixos-config
+#
+# NixOS rebuild script
+#
+# original by 0atman: https://gist.github.com/0atman/1a5133b842f929ba4c1e195ee67599d5
 
-sudo nixos-rebuild switch --flake . &>nixos-switch.log || (cat nixos-switch.log | grep --color error && exit 1)
+set -e
+
+pushd ~/nixos-config
+
+if git diff --quiet; then
+    echo "No changes detected, exiting."
+    popd
+    exit 0
+fi
+
+alejandra . &>/dev/null \
+    || ( alejandra . ; echo "formatting failed!" && exit 1)
+
+git diff -U0
+
+echo "NixOS rebuilding..."
+
+sudo nixos-rebuild switch --flake . &>nixos-switch.log \
+    || (cat nixos-switch.log | grep --color error && exit 1)
 
 current=$(nixos-rebuild list-generations | grep current)
 
 git commit -am "$current"
 
-notify-send -e "NixOS Rebuilt OK!" --icon=software-update-available
+popd
 
+notify-send -e "NixOS Rebuilt OK!" --icon=software-update-available