66 lines
2.1 KiB
Python
66 lines
2.1 KiB
Python
# vi: ts=4 expandtab
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#
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# Copyright (C) 2012 Canonical Ltd.
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# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
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# Copyright (C) 2012 Yahoo! Inc.
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#
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# Author: Scott Moser <scott.moser@canonical.com>
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# Author: Juerg Haefliger <juerg.haefliger@hp.com>
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# Author: Joshua Harlow <harlowja@yahoo-inc.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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import sys
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from cloudinit import log as logging
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LOG = logging.getLogger(__name__)
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def import_module(module_name):
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__import__(module_name)
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return sys.modules[module_name]
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def find_module(base_name, search_paths, required_attrs=None):
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found_places = []
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if not required_attrs:
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required_attrs = []
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real_paths = []
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for path in search_paths:
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real_path = []
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if path:
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real_path.extend(path.split("."))
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real_path.append(base_name)
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full_path = '.'.join(real_path)
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real_paths.append(full_path)
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LOG.debug("Looking for modules %s that have attributes %s",
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real_paths, required_attrs)
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for full_path in real_paths:
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mod = None
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try:
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mod = import_module(full_path)
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except ImportError:
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pass
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if not mod:
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continue
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found_attrs = 0
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for attr in required_attrs:
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if hasattr(mod, attr):
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found_attrs += 1
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if found_attrs == len(required_attrs):
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found_places.append(full_path)
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LOG.debug("Found %s with attributes %s in %s", base_name,
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required_attrs, found_places)
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return found_places
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