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that also has a potential set of required attributes. 2. Use this new importer to find the distro class, the userdata handler modules, the config modules and the datasource modules, if none can be found error out accordingly.
57 lines
1.8 KiB
Python
57 lines
1.8 KiB
Python
# vi: ts=4 expandtab
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#
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# Copyright (C) 2008-2010 Canonical Ltd.
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# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
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#
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# Author: Chuck Short <chuck.short@canonical.com>
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# Author: Juerg Haefliger <juerg.haefliger@hp.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 3, as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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from cloudinit.settings import (PER_INSTANCE, FREQUENCIES)
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from cloudinit import log as logging
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LOG = logging.getLogger(__name__)
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# This prefix is used to make it less
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# of a change that when importing
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# we will not find something else with the same
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# name in the lookup path...
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MOD_PREFIX = "cc_"
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def form_module_name(name):
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canon_name = name.replace("-", "_")
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if canon_name.lower().endswith(".py"):
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canon_name = canon_name[0:(len(canon_name) - 3)]
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canon_name = canon_name.strip()
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if not canon_name:
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return None
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if not canon_name.startswith(MOD_PREFIX):
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canon_name = '%s%s' % (MOD_PREFIX, canon_name)
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return canon_name
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def fixup_module(mod, def_freq=PER_INSTANCE):
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if not hasattr(mod, 'frequency'):
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setattr(mod, 'frequency', def_freq)
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else:
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freq = mod.frequency
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if freq and freq not in FREQUENCIES:
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LOG.warn("Module %s has an unknown frequency %s", mod, freq)
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if not hasattr(mod, 'distros'):
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setattr(mod, 'distros', None)
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return mod
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