Coverage for netbox_interface_name_rules / regex_safety.py: 100.00%

1# SPDX-License-Identifier: Apache-2.0 

2# Copyright (C) 2025 Marcin Zieba <marcinpsk@gmail.com> 

3"""Compile stored rule patterns with a bounded regular-expression engine.""" 

4 

5import re2 

6from django.core.exceptions import ValidationError 

7 

8_OPTIONS = re2.Options() 

9_OPTIONS.log_errors = False 

10 

11 

12def _error_detail(exc): 

13 """Return RE2's parser error as text without its bytes representation.""" 

14 detail = exc.args[0] if exc.args else str(exc) 

15 return detail.decode(errors="replace") if isinstance(detail, bytes) else str(detail) 

16 

17 

18def compile_module_type_pattern(pattern): 

19 """Compile a stored rule pattern with RE2, or raise a field validation error.""" 

20 try: 

21 return re2.compile(pattern, options=_OPTIONS) 

22 except re2.error as exc: 

23 raise ValidationError({"module_type_pattern": f"Invalid RE2 pattern: {_error_detail(exc)}"}) from exc