| # Copyright 2026 The Fuchsia Authors. All rights reserved. | |
| # Use of this source code is governed by a BSD-style license that can be | |
| # found in the LICENSE file. | |
| """Utility functions for cog scripts.""" | |
| import re | |
| def sanitize_filename(filename: str) -> str: | |
| """Sanitizes a string to be used as a safe filename. | |
| Replaces characters that are not alphanumeric, underscores, periods, or | |
| hyphens with hyphens and converts the string to lowercase. | |
| """ | |
| return re.sub(r"[^a-zA-Z0-9._-]+", "-", filename).lower() |