scanner code v1 & new libs

lib/pathspec/_backends/re2/base.py

@@ -0,0 +1,18 @@
+"""
+This module provides the base implementation for the :module:`re2` backend.
+
+WARNING: The *pathspec._backends.re2* package is not part of the public API. Its
+contents and structure are likely to change.
+"""
+from __future__ import annotations
+
+from typing import (
+	Optional)  # Replaced by `X | None` in 3.10.
+
+from ._base import (
+	re2_error)
+
+re2_error: Optional[Exception]
+"""
+*re2_error* (:class:`Exception` or :data:`None`) is the re2 import error.
+"""