updated rebuild script to auto delete result

rebuild.sh

@@ -1,5 +1,12 @@
 #!/usr/bin/env bash
 
+if [ -d "result" ];
+then
+  preserve_result=true
+else
+  preserve_result=false
+fi
+
 while [ $# -gt 0 ]; do
   case "$1" in
     --target*|-t*)
@@ -18,12 +25,20 @@ while [ $# -gt 0 ]; do
       if [[ "$1" != *=* ]]; then shift; fi
       user="${1#*=}"
       ;;
+    --preserve-result)
+      preserve_result=true
+      ;;
+    --no-preserve-result)
+      preserve_result=false
+      ;;
     --help|-h)
       echo "--help -h: print this message"
       echo "--target -t: set the target system to rebuild on"
       echo "--flake -f: set the flake to rebuild on the target system"
       echo "--mode -m: set the mode to rebuild flake as on the target system"
       echo "--user -u: set the user to rebuild flake as on the target system"
+      echo "--preserve-result: do not remove the generated result folder after building"
+      echo "--no-preserve-result: remove any result folder after building"
       exit 0
       ;;
     *)
@@ -39,9 +54,17 @@ flake=${flake:-$target}
 mode=${mode:-switch}
 user=${user:-$USER}
 
-if [[ "$target" == "$(hostname)" ]]
+if [[ "$target" == "$(hostname)" ]];
 then
 	nixos-rebuild $mode --use-remote-sudo --flake .#$flake
 else
 	nixos-rebuild $mode --use-remote-sudo --target-host $user@$target --flake .#$flake
 fi
+
+if [ -d "result" ];
+then
+  if [[ "$preserve_result" == "false" ]];
+  then
+    rm -r result
+  fi
+fi