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# ==============================================================================
# Copyright 2011 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# 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.
# ==============================================================================
from cfnbootstrap.rpm_tools import RpmTool
from cfnbootstrap.util import LoggingProcessHelper
from cfnbootstrap.cfn_logging import CfnLogger
from cfnbootstrap.construction_errors import ToolError
import logging
log = CfnLogger(logging.getLogger("cfn.init"))
class ZypperTool(object):
"""Install packages use Zypper package manager"""
def apply(self, action, auth_config=None):
packages_changed = []
if not action:
log.debug("No packages specified for Zypper")
return packages_changed
# TODO: check if Zypper has `apt-cache -q gencaches` equivelant. Currently I don't think there is.
package_specs_to_upgrade = []
package_specs_to_downgrade = []
for package_name in action:
if action[package_name]:
if isinstance(action[package_name], str):
package_version = action[package_name]
else:
package_version = RpmTool.max_version(
action[package_name])
else:
package_version = None
package_specs = "{}-{}".format(
package_name, package_version) if package_version is not None else package_name
if self._is_package_installed(package_specs):
# Exact requested package spec is installed
log.debug(
"{} will not be installed as it is already present".format(package_specs))
elif not self._is_package_available(package_specs):
# Not available, returns an error
log.error(
"{} is not available to be installed".format(package_specs))
raise ToolError(
"Zypper does not have {} available for installation".format(package_specs))
elif package_version is None:
package_specs_to_upgrade.append(package_specs)
packages_changed.append(package_name)
else:
# a specific version is requested that's available but not installed.
(_, installed_version) = RpmTool.get_package_version(
package_name, False)
if self._should_upgrade(package_version, installed_version):
log.debug("Upgrading to {} from installed version {}".format(
package_specs, installed_version))
package_specs_to_upgrade.append(package_specs)
else:
log.debug("Downgarding to {} from installed version {}".format(
package_specs, installed_version))
package_specs_to_downgrade.append(package_specs)
packages_changed.append(package_name)
if not packages_changed:
log.info("All Zypper packages were already installed")
return []
if package_specs_to_upgrade:
log.debug(
"Installing/updating {} via zypper".format(package_specs_to_upgrade))
upgrade_result = LoggingProcessHelper(
["zypper", "install", "-y"] + package_specs_to_upgrade).call()
if upgrade_result.returncode != 0:
log.error("Zypper failed. Output: {}".format(
upgrade_result.stdout))
raise ToolError(
"Could not successfully install/update zypper packages", upgrade_result.returncode)
if package_specs_to_downgrade:
log.debug("Downgrading {} via zypper".format(
package_specs_to_downgrade))
downgrade_result = LoggingProcessHelper(
["zypper", "install", "-y", "--oldpackage", "--force-resolution"] + package_specs_to_downgrade).call()
if downgrade_result.returncode != 0:
log.error("Zypper failed. Output: {}".format(
downgrade_result.stdout))
raise ToolError(
"Could not successfully downgrade zypper packages", downgrade_result.returncode)
log.info("Zypper installed {}".format(
package_specs_to_upgrade + package_specs_to_downgrade))
return packages_changed
def _should_upgrade(self, requested_package_version, installed_version):
if not requested_package_version:
log.debug("No requested version passed, try to upgrade")
return True
if not installed_version:
log.debug("No installed version passed, try to upgrade")
return True
version_comparison = RpmTool.compare_rpm_versions(
requested_package_version, installed_version)
if version_comparison > 0:
log.debug("Requested version {} is greater than installed version {}, will upgrade".format(
requested_package_version, installed_version))
return True
else:
log.debug("Requested version {} is NOT greater than installed version {}, will downgrade".format(
requested_package_version, installed_version))
return False
def _is_package_installed(self, package_key):
"""
Check if a package has been installed locally.
package_key: could be package_name such as "git" or a package name with version such as "git-2.15-2.1"
"""
log.debug("check if {} is already installed".format(package_key))
query_result = LoggingProcessHelper(
["zypper", "search", "--match-exact", "--installed-only", package_key]).call()
return query_result.returncode == 0
def _is_package_available(self, package_key):
"""
Check if a package is available for installation.
package_key: could be package_name such as "git" or a package name with version such as "git-2.15-2.1"
"""
query_result = LoggingProcessHelper(
["zypper", "search", "--match-exact", "--not-installed-only", package_key]).call()
return query_result.returncode == 0