init

.venv/lib/python3.8/site-packages/filelock/_util.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+import os
+import stat
+
+
+def raise_on_exist_ro_file(filename: str) -> None:
+    try:
+        file_stat = os.stat(filename)  # use stat to do exists + can write to check without race condition
+    except OSError:
+        return None  # swallow does not exist or other errors
+
+    if file_stat.st_mtime != 0:  # if os.stat returns but modification is zero that's an invalid os.stat - ignore it
+        if not (file_stat.st_mode & stat.S_IWUSR):
+            raise PermissionError(f"Permission denied: {filename!r}")
+
+
+__all__ = [
+    "raise_on_exist_ro_file",
+]