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# -*- coding: utf-8 -*-
"""
g_octave.checksum
~~~~~~~~~~~~~~~~~
This module implements functions for compute/generate SHA1 checksums
for DESCRIPTION files.
:copyright: (c) 2010 by Rafael Goncalves Martins
:license: GPL-2, see LICENSE for more details.
"""
from __future__ import absolute_import
__all__ = [
'sha1_compute',
'sha1_check',
'sha1_check_db',
]
import hashlib
import json
import os
from .config import Config
config = Config()
def sha1_compute(filename):
'''Computes the SHA1 checksum of a file'''
with open(filename, 'rb') as fp:
return hashlib.sha1(fp.read()).hexdigest()
def sha1_check(db, p):
'''Checks if the SHA1 checksum of the package is OK.'''
description = db[p]
manifest = {}
with open(os.path.join(config.db, 'manifest.json')) as fp:
manifest = json.load(fp)
if p not in manifest:
return False
return manifest[p] == description.sha1sum()
def sha1_check_db(db):
'''Checks if the SHA1 checksums of the package database are OK.'''
for cat in db.pkg_list:
for pkg in db.pkg_list[cat]:
p = pkg['name']+'-'+pkg['version']
if not sha1_check(db, p):
return False
return True
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