Fix ls

- Fix bag: return empty list if contain one directory
- Fix bag: return empty list when _ls_from_cache have not cache but have key

Author: renesat

src/lakefs_spec/spec.py

@@ -429,7 +429,7 @@ def _ls_from_cache(self, path: str, recursive: bool = False) -> list[dict[str, A
                 result = []
             result.extend(files)
         if not result:
-            return result
+            return None
         return sorted(result, key=operator.itemgetter("name"))
 
     @overload
@@ -542,7 +542,7 @@ def ls(
         # Retry the API call with appended slash if the current result
         # is just a single directory entry only (not its contents).
         # This is useful to allow `ls("repo/branch/dir")` calls without a trailing slash.
-        if len(info) == 1 and info[0]["type"] == "directory":
+        if len(info) == 1 and info[0]["type"] == "directory" and info[0]["name"] == path + "/":
             return self.ls(
                 path + "/",
                 detail=detail,