refactor: define the Dify project version in pyproject.toml (#20910)

api/libs/file_utils.py

@@ -0,0 +1,30 @@
+from pathlib import Path
+
+
+def search_file_upwards(
+    base_dir_path: Path,
+    target_file_name: str,
+    max_search_parent_depth: int,
+) -> Path:
+    """
+    Find a target file in the current directory or its parent directories up to a specified depth.
+    :param base_dir_path: Starting directory path to search from.
+    :param target_file_name: Name of the file to search for.
+    :param max_search_parent_depth: Maximum number of parent directories to search upwards.
+    :return: Path of the file if found, otherwise None.
+    """
+    current_path = base_dir_path.resolve()
+    for _ in range(max_search_parent_depth):
+        candidate_path = current_path / target_file_name
+        if candidate_path.is_file():
+            return candidate_path
+        parent_path = current_path.parent
+        if parent_path == current_path:  # reached the root directory
+            break
+        else:
+            current_path = parent_path
+
+    raise ValueError(
+        f"File '{target_file_name}' not found in the directory '{base_dir_path.resolve()}' or its parent directories"
+        f" in depth of {max_search_parent_depth}."
+    )