| # Copyright 2016 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import os |
| |
| |
| def MergeFiles(dest_file, source_files): |
| """Merge list of files into single destination file. |
| |
| Args: |
| dest_file: File to be written to. |
| source_files: List of files to be merged. Will be merged in the order they |
| appear in the list. |
| """ |
| if not os.path.exists(os.path.dirname(dest_file)): |
| os.makedirs(os.path.dirname(dest_file)) |
| try: |
| with open(dest_file, 'w') as dest_f: |
| for source_file in source_files: |
| with open(source_file, 'r') as source_f: |
| dest_f.write(source_f.read()) |
| except Exception as e: # pylint: disable=broad-except |
| # Something went wrong when creating dest_file. Cleaning up. |
| try: |
| os.remove(dest_file) |
| except OSError: |
| pass |
| raise e |
| |
| |
