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# -*- Mode: Python; coding: utf-8; indent-tabs-mode: nil; tab-width: 4 -*-
# Copyright (C) 2013 Canonical Ltd.
# Author: Sergio Schvezov <sergio.schvezov@canonical.com>
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 3 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import logging
import os.path
from phabletutils import downloads
log = logging.getLogger()
def hash2dict(hash_file_content):
'''Returns a dictionary with the sha256 sums for all files.'''
if not hash_file_content:
log.debug('hash file is empty')
return None
hash_list = filter((lambda x: len(x) is not 0),
hash_file_content.split('\n'))
hash_list = [h.split() for h in hash_list]
hash_dict = {}
for hash_entry in hash_list:
if hash_entry[1][0] == '*':
hash_entry[1] = hash_entry[1][1:]
hash_dict[hash_entry[1]] = hash_entry[0]
return hash_dict
def load_hash(uri, artifact, download_dir=None):
if download_dir:
hash_path = os.path.join(download_dir, artifact)
else:
hash_path = None
hashes = {}
if hash_path and os.path.exists(hash_path):
with open(hash_path, 'r') as f:
file_hash_content = f.read()
hashes = hash2dict(file_hash_content)
if uri:
uri = '%s/%s' % (uri, artifact)
hash_content = downloads.get_content(uri)
if not hash_content:
raise RuntimeError('%s cannot be downloaded' % uri)
hashes.update(hash2dict(hash_content))
if hash_path:
log.debug('Storing hash to %s' % hash_path)
with downloads.flocked(hash_path):
with open(hash_path, 'w') as f:
for key in hashes:
f.write('%s %s\n' % (hashes[key], key))
if hashes:
return hashes
else:
raise RuntimeError('%s cannot be obtained for verifiaction' % artifact)
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