file.py 文件源码

def contents_match(self, path):
        """Determines if the file content is the same.

        This is determined by comparing hashsum of the file contents and
        the saved hashsum. If there is no hashsum, then the content cannot
        be sure to be the same so treat them as if they are not the same.
        Otherwise, return True if the hashsums are the same, False if they
        are not the same.

        :param path: the file to check.
        """
        checksum = file_hash(path)

        kv = unitdata.kv()
        stored_checksum = kv.get('hardening:%s' % path)
        if not stored_checksum:
            # If the checksum hasn't been generated, return False to ensure
            # the file is written and the checksum stored.
            log('Checksum for %s has not been calculated.' % path, level=DEBUG)
            return False
        elif stored_checksum != checksum:
            log('Checksum mismatch for %s.' % path, level=DEBUG)
            return False

        return True