63 lines
2.0 KiB
Python
63 lines
2.0 KiB
Python
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# Copyright (C) 2011 Nippon Telegraph and Telephone Corporation.
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# Copyright (C) 2011 Isaku Yamahata <yamahata at valinux co jp>
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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 as published by
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# the Free Software Foundation, version 3 of the License.
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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 inspect
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import logging
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import os
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import sys
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LOG = logging.getLogger('ryu.utils')
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def import_module(modname):
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(f, s, t) = modname.rpartition('.')
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mod = __import__(modname, fromlist=[f])
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return mod
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def import_object(modname):
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try:
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return import_module(modname)
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except ImportError:
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(from_mod, sep, target) = modname.rpartition('.')
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mod = import_module(from_mod)
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return getattr(mod, target)
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RYU_DEFAULT_FLAG_FILE = ('ryu.conf', 'etc/ryu/ryu.conf' '/etc/ryu/ryu.conf')
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def find_flagfile(default_path=RYU_DEFAULT_FLAG_FILE):
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if '--flagfile' in sys.argv:
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return
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script_dir = os.path.dirname(inspect.stack()[-1][1])
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for filename in RYU_DEFAULT_FLAG_FILE:
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if not os.path.abspath(filename):
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if os.path.exists(filename):
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# try relative to current path
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filename = os.path.abspath(filename)
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elif os.path.exists(os.path.join(script_dir, filename)):
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# try relative to script dir
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filename = os.path.join(script_dir, filename)
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if not os.path.exists(filename):
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continue
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flagfile = '--flagfile=%s' % filename
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sys.argv.insert(1, flagfile)
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LOG.debug('flagfile = %s', filename)
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return
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