fix ScanPoliciesManager support for compiled regexes

CHANGELOG.md

@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+* Fix ScanPoliciesManager support for compiled regexes
+
 ### Infrastructure
 * Fix readthedocs build by updating to v2 configuration schema
 * Fix spellcheck erroring out on LICENSE file

b2sdk/scan/policies.py

@@ -43,7 +43,7 @@ def matches(self, s):
         return any(c.match(s) is not None for c in self._compiled_list)
 
 
-def convert_dir_regex_to_dir_prefix_regex(dir_regex):
+def convert_dir_regex_to_dir_prefix_regex(dir_regex: str | re.Pattern) -> str:
     """
     The patterns used to match directory names (and file names) are allowed
     to match a prefix of the name.  This 'feature' was unintentional, but is
@@ -65,8 +65,10 @@ def convert_dir_regex_to_dir_prefix_regex(dir_regex):
     either the regex ends in '$' or does not.
 
     :param dir_regex: a regular expression string or literal
-    :type dir_regex: str
+    :return: a regular expression string which matches the directory prefix
     """
+    if isinstance(dir_regex, re.Pattern):
+        dir_regex = dir_regex.pattern
     if dir_regex.endswith('$'):
         return dir_regex[:-1] + r'/'
     else:

test/unit/scan/test_scan_policies.py

@@ -70,3 +70,15 @@ def test_illegal_timestamp(self, param, exception):
         }
         with pytest.raises(exception):
             ScanPoliciesManager(**kwargs)
+
+    @pytest.mark.apiver(from_ver=2)
+    def test_re_pattern_argument_support(self):
+        kwargs = {
+            param: (re.compile(r".*"),)
+            for param in (
+                "exclude_dir_regexes",
+                "exclude_file_regexes",
+                "include_file_regexes",
+            )
+        }
+        ScanPoliciesManager(**kwargs)