Add error handling for non-existent or invalid tool folder in load_tools_from_folder

Author: martinmoldrup

toolit/auto_loader.py

@@ -15,7 +15,7 @@
 from toolit.create_apps_and_register import register_command
 from types import FunctionType, ModuleType
 from typing import Callable
-
+import typer
 
 def get_items_from_folder(
     folder_path: pathlib.Path,
@@ -56,6 +56,15 @@ def load_tools_from_folder(folder_path: pathlib.Path) -> list[FunctionType]:
 
     Folder is relative to the project's working directory.
     """
+    if not folder_path.exists() or not folder_path.is_dir():
+        msg = (
+            "No tools loaded.\n"
+            "The folder selected for devtools does not exist or is not a directory.\n"
+            f"{folder_path.absolute().as_posix()}\n"
+            "Please create it and add your tools there."
+        )
+        typer.secho(f"\n{'='*60}\nERROR: {msg}\n{'='*60}\n", fg=typer.colors.RED, bold=True)
+        return []
     # If folder_path is relative, compute its absolute path using the current working directory.
     if not folder_path.is_absolute():
         folder_path = pathlib.Path.cwd() / folder_path