# Copyright 2012 - John Calixto
#
# This file is part of bang.
#
# bang is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# bang is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with bang. If not, see <http://www.gnu.org/licenses/>.
from .aws import AWS
PROVIDER_MAP = {
'aws': AWS,
}
_POSSIBLE_PROVIDERS = (
('hpcloud_v12', 'bang.providers.hpcloud.v12', 'HPCloudV12'),
('hpcloud_v13', 'bang.providers.hpcloud', 'HPCloud'),
('openstack', 'bang.providers.openstack', 'OpenStack'),
('rightscale', 'bang.providers.rs', 'RightScale'),
)
for key, mod_name, provider in _POSSIBLE_PROVIDERS:
try:
_mod = __import__(mod_name, fromlist=[provider], level=0)
PROVIDER_MAP[key] = getattr(_mod, provider)
except ImportError:
pass
# provider object cache:
_PROVIDERS = {}
[docs]def get_provider(name, creds):
"""
Generates and memoizes a :class:`~bang.providers.provider.Provider` object
for the given name.
:param str name: The provider name, as given in the config stanza. This
token is used to find the
appropriate :class:`~bang.providers.provider.Provider`.
:param dict creds: The credentials dictionary that is appropriate for the
desired provider. Typically, a sub-dict from the main stack config.
:rtype: :class:`~bang.providers.provider.Provider`
"""
p = _PROVIDERS.get(name)
if not p:
provider = PROVIDER_MAP.get(name)
if not provider:
if name == 'hpcloud':
print "## Warning - 'hpcloud' is not currently supported as" \
"a provider; use hpcloud_v12 or hpcloud_v13. See " \
"release notes."
raise Exception("No provider matches %s; check imports" % name)
p = provider(creds)
_PROVIDERS[name] = p
return p