| #!/usr/bin/env python | |
| # Copyright (c) 2014 Google Inc. All rights reserved. | |
| # | |
| # Redistribution and use in source and binary forms, with or without | |
| # modification, are permitted provided that the following conditions are | |
| # met: | |
| # | |
| # * Redistributions of source code must retain the above copyright | |
| # notice, this list of conditions and the following disclaimer. | |
| # * Redistributions in binary form must reproduce the above | |
| # copyright notice, this list of conditions and the following disclaimer | |
| # in the documentation and/or other materials provided with the | |
| # distribution. | |
| # * Neither the name of Google Inc. nor the names of its | |
| # contributors may be used to endorse or promote products derived from | |
| # this software without specific prior written permission. | |
| # | |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| import hashlib | |
| import os.path | |
| try: | |
| import json | |
| except ImportError: | |
| import simplejson as json | |
| def save_hashes(hashes_file_path, hashes): | |
| try: | |
| with open(hashes_file_path, "wt") as hashes_file: | |
| json.dump(hashes, hashes_file, indent=4, separators=(",", ": ")) | |
| except: | |
| print "ERROR: Failed to write %s" % hashes_file_path | |
| raise | |
| def load_hashes(hashes_file_path): | |
| try: | |
| with open(hashes_file_path, "r") as hashes_file: | |
| hashes = json.load(hashes_file) | |
| except: | |
| return {} | |
| return hashes | |
| def calculate_file_hash(file_path): | |
| with open(file_path) as file: | |
| data = file.read() | |
| md5_hash = hashlib.md5(data).hexdigest() | |
| return md5_hash | |
| def files_with_invalid_hashes(hash_file_path, file_paths): | |
| hashes = load_hashes(hash_file_path) | |
| result = [] | |
| for file_path in file_paths: | |
| file_name = os.path.basename(file_path) | |
| if calculate_file_hash(file_path) != hashes.get(file_name, ""): | |
| result.append(file_path) | |
| return result | |
| def update_file_hashes(hash_file_path, file_paths): | |
| hashes = {} | |
| for file_path in file_paths: | |
| file_name = os.path.basename(file_path) | |
| hashes[file_name] = calculate_file_hash(file_path) | |
| save_hashes(hash_file_path, hashes) |