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127 lines
4.3 KiB
127 lines
4.3 KiB
from leapp.exceptions import StopActorExecutionError
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from leapp.libraries.common.config.version import get_source_major_version
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from leapp.libraries.stdlib import api, CalledProcessError
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def get_leapp_packages():
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"""
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Return the list of leapp and leapp-repository rpms that should be preserved
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during the upgrade.
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It's list of packages that should be preserved, not what is really
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installed.
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The snactor RPM doesn't have to be installed, but if so, we have to take
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care about that too as well to prevent broken dnf transaction.
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"""
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# TODO: should we set the seatbelt and exclude leapp RPMs from the target
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# system too?
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generic = ['leapp', 'snactor']
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if get_source_major_version() == '7':
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return generic + ['python2-leapp', 'leapp-upgrade-el7toel8']
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return generic + ['python3-leapp', 'leapp-upgrade-el8toel9']
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def _strip_split(data, sep, maxsplit=-1):
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"""
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Just like str.split(), but remove ambient whitespaces from all items
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"""
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return [item.strip() for item in data.split(sep, maxsplit)]
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def _get_main_dump(context, disable_plugins):
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"""
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Return the dnf configuration dump of main options for the given context.
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Returns the list of lines after the line with "[main]" section
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"""
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cmd = ['dnf', 'config-manager', '--dump']
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if disable_plugins:
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for plugin in disable_plugins:
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cmd += ['--disableplugin', plugin]
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try:
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data = context.call(cmd, split=True)['stdout']
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except CalledProcessError as e:
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api.current_logger().error('Cannot obtain the dnf configuration')
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raise StopActorExecutionError(
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message='Cannot obtain data about the DNF configuration',
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details={'stdout': e.stdout, 'stderr': e.stderr}
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)
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try:
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# return index of the first item in the main section
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main_start = data.index('[main]') + 1
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except ValueError:
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raise StopActorExecutionError(
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message='Invalid DNF configuration data (missing [main])',
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details=data,
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)
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output_data = {}
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for line in data[main_start:]:
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try:
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key, val = _strip_split(line, '=', 1)
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except ValueError:
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# This is not expected to happen, but call it a seatbelt in case
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# the dnf dump implementation will change and we will miss it
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# This is not such a hard error as the one above, as it means
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# some values could be incomplete, however we are still able
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# to continue.
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api.current_logger().warning(
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'Cannot parse the dnf dump correctly, line: {}'.format(line))
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pass
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output_data[key] = val
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return output_data
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def _get_excluded_pkgs(context, disable_plugins):
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"""
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Return the list of excluded packages for DNF in the given context.
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It shouldn't be used on the source system. It is expected this functions
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is called only in the target userspace container or on the target system.
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"""
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pkgs = _strip_split(_get_main_dump(context, disable_plugins).get('exclude', ''), ',')
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return [i for i in pkgs if i]
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def _set_excluded_pkgs(context, pkglist, disable_plugins):
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"""
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Configure DNF to exclude packages in the given list
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Raise the CalledProcessError on error.
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"""
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exclude = 'exclude={}'.format(','.join(pkglist))
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cmd = ['dnf', 'config-manager', '--save', '--setopt', exclude]
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if disable_plugins:
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for plugin in disable_plugins:
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cmd += ['--disableplugin', plugin]
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try:
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context.call(cmd)
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except CalledProcessError:
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api.current_logger().error('Cannot set the dnf configuration')
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raise
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api.current_logger().debug('The DNF configuration has been updated to exclude leapp packages.')
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def exclude_leapp_rpms(context, disable_plugins):
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"""
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Ensure the leapp RPMs are excluded from any DNF transaction.
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This has to be called several times to ensure that our RPMs are not removed
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or updated (replaced) during the IPU. The action should happen inside
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- the target userspace container
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- on the host system
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So user will have to drop these packages from the exclude after the
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upgrade.
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"""
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to_exclude = list(set(_get_excluded_pkgs(context, disable_plugins) + get_leapp_packages()))
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_set_excluded_pkgs(context, to_exclude, disable_plugins)
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