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# Copyright (C) 2013 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
def hash_bower_component(hash_obj, path):
"""Hash the contents of a bower component directory.
This is a stable hash of a directory downloaded with `bower install`, minus
the .bower.json file, which is autogenerated each time by bower. Used in
lieu of hashing a zipfile of the contents, since zipfiles are difficult to
hash in a stable manner.
Args:
hash_obj: an open hash object, e.g. hashlib.sha1().
path: path to the directory to hash.
Returns:
The passed-in hash_obj.
"""
if not os.path.isdir(path):
raise ValueError('Not a directory: %s' % path)
path = os.path.abspath(path)
for root, dirs, files in os.walk(path):
dirs.sort()
for f in sorted(files):
if f == '.bower.json':
continue
p = os.path.join(root, f)
hash_obj.update(p[len(path)+1:].encode("utf-8"))
hash_obj.update(open(p, "rb").read())
return hash_obj