Add deterministic hash salt.

main.py

@@ -16,16 +16,16 @@ indexer = None
 
 
 class FileIndexer:
-    def __init__(self, path: str):
+    def __init__(self, path: str, salt: str | None = None):
         self.path = Path(path)
         self.file_mapping = {}
-        self._salt = None
+        self._salt = salt
         self._index()
 
     @property
     def salt(self) -> str:
         """Generate a random salt for hashing"""
-        if not self._salt:
+        if self._salt is None:
             self._salt = secrets.token_hex(16)
         return self._salt
 
@@ -97,7 +97,11 @@ def initialize_server(args: argparse.Namespace):
     if not src_path.exists():
         raise SystemExit(f"Source path {src_path} does not exist")
 
-    indexer = FileIndexer(src_path) if src_path.is_dir() else INDEXER_MAP[src_path.suffix](src_path)
+    indexer = (
+        FileIndexer(src_path, args.salt)
+        if src_path.is_dir()
+        else INDEXER_MAP[src_path.suffix](src_path, args.salt)
+    )
 
     print(f"Indexed {len(indexer.file_mapping)} files")
 
@@ -167,6 +171,7 @@ if __name__ == "__main__":
     parser.add_argument("source", type=str, help="Path to directory or ZIP archive")
     parser.add_argument("--host", type=str, default="0.0.0.0", help="Host to bind to")
     parser.add_argument("--port", type=int, default=8000, help="Port to bind to")
+    parser.add_argument("--salt", type=str, default=None, help="Salt for hashing file paths")
     args = parser.parse_args()
 
     initialize_server(args)