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# Copyright (C) 2012 Canonical Ltd.
# Copyright (C) 2012 Hewlett-Packard Development Company, L.P.
# Copyright (C) 2012 Yahoo! Inc.
#
# Author: Scott Moser <scott.moser@canonical.com>
# Author: Juerg Haefliger <juerg.haefliger@hp.com>
# Author: Joshua Harlow <harlowja@yahoo-inc.com>
#
# This file is part of cloud-init. See LICENSE file for license information.
import sys
def import_module(module_name):
__import__(module_name)
return sys.modules[module_name]
def find_module(base_name, search_paths, required_attrs=None):
if not required_attrs:
required_attrs = []
# NOTE(harlowja): translate the search paths to include the base name.
lookup_paths = []
for path in search_paths:
real_path = []
if path:
real_path.extend(path.split("."))
real_path.append(base_name)
full_path = '.'.join(real_path)
lookup_paths.append(full_path)
found_paths = []
for full_path in lookup_paths:
mod = None
try:
mod = import_module(full_path)
except ImportError:
pass
if not mod:
continue
found_attrs = 0
for attr in required_attrs:
if hasattr(mod, attr):
found_attrs += 1
if found_attrs == len(required_attrs):
found_paths.append(full_path)
return (found_paths, lookup_paths)
# vi: ts=4 expandtab