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#!/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 re
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 = re.sub(".*/", "", 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 = re.sub(".*/", "", file_path)
hashes[file_name] = calculate_file_hash(file_path)
save_hashes(hash_file_path, hashes)
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