0  honline #lY>TD Ep.F h8:2   0$ lan-j YS o? # Copyright (C) 2020 Red Hat, Inc. # # 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; either version 2 of the License, or # (at your option) any later version. # # 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 Library General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. from __future__ import absolute_import from __future__ import print_function from __future__ import unicode_literals import libdnf import hawkey from dnf.i18n import _ import dnf.exceptions import json VERSION_MAJOR = 0 VERSION_MINOR = 0 VERSION = "%s.%s" % (VERSION_MAJOR, VERSION_MINOR) """ The version of the stored transaction. MAJOR version denotes backwards incompatible changes (old dnf won't work with new transaction JSON). MINOR version denotes extending the format without breaking backwards compatibility (old dnf can work with new transaction JSON). Forwards compatibility needs to be handled by being able to process the old format as well as the new one. """ class TransactionError(dnf.exceptions.Error): def __init__(self, msg): super(TransactionError, self).__init__(msg) class TransactionReplayError(dnf.exceptions.Error): def __init__(self, filename, errors): """ :param filename: The name of the transaction file being replayed :param errors: a list of error classes or a string with an error description """ # store args in case someone wants to read them from a caught exception self.filename = filename if isinstance(errors, (list, tuple)): self.errors = errors else: self.errors = [errors] if filename: msg = _('The following problems occurred while replaying the transaction from file "{filename}":').format(filename=filename) else: msg = _('The following problems occurred while running a transaction:') for error in self.errors: msg += "\n " + str(error) super(TransactionReplayError, self).__init__(msg) class IncompatibleTransactionVersionError(TransactionReplayError): def __init__(self, filename, msg): super(IncompatibleTransactionVersionError, self).__init__(filename, msg) def _check_version(version, filename): major, minor = version.split('.') try: major = int(major) except ValueError as e: raise TransactionReplayError( filename, _('Invalid major version "{major}", number expected.').format(major=major) ) try: int(minor) # minor is unused, just check it's a number except ValueError as e: raise TransactionReplayError( filename, _('Invalid minor version "{minor}", number expected.').format(minor=minor) ) if major != VERSION_MAJOR: raise IncompatibleTransactionVersionError( filename, _('Incompatible major version "{major}", supported major version is "{major_supp}".') .format(major=major, major_supp=VERSION_MAJOR) ) def serialize_transaction(transaction): """ Serializes a transaction to a data structure that is equivalent to the stored JSON format. :param transaction: the transaction to serialize (an instance of dnf.db.history.TransactionWrapper) """ data = { "version": VERSION, } rpms = [] groups = [] environments = [] if transaction is None: return data for tsi in transactio