Fix: Allow database update when file doesn't exist

The --update-database command should create the database file if it doesn't exist, but the current implementation raises an error before attempting the download.

This fix changes the validation logic to only check if existing files are writeable, allowing the download logic to create the file and parent directories as needed.

Fixes #2689

Author: by22Jy

intelmq/bots/experts/asn_lookup/expert.py

@@ -123,10 +123,12 @@ def update_database(cls, verbose=False):
             raise MissingDependencyError("pyasn")
 
         for database_path in set(bots.values()):
-            if not Path(database_path).is_file():
-                raise ValueError('Database file does not exist or is not a file.')
-            elif not os.access(database_path, os.W_OK):
-                raise ValueError('Database file is not writeable.')
+            database_file = Path(database_path)
+            if database_file.is_file():
+                # File exists, check if it's writeable
+                if not os.access(database_path, os.W_OK):
+                    raise ValueError('Database file is not writeable.')
+            # If file doesn't exist, the directory will be created later when downloading
 
         try:
             if verbose: