Source code for heat.engine.cfn.template
# vim: tabstop=4 shiftwidth=4 softtabstop=4
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
from heat.engine import parameters
from heat.engine import template
[docs]class CfnTemplate(template.Template):
'''A stack template.'''
SECTIONS = (VERSION, ALTERNATE_VERSION, DESCRIPTION, MAPPINGS,
PARAMETERS, RESOURCES, OUTPUTS) = \
('AWSTemplateFormatVersion', 'HeatTemplateFormatVersion',
'Description', 'Mappings', 'Parameters', 'Resources', 'Outputs'
)
SECTIONS_NO_DIRECT_ACCESS = set([PARAMETERS, VERSION, ALTERNATE_VERSION])
def __getitem__(self, section):
'''Get the relevant section in the template.'''
if section not in self.SECTIONS:
raise KeyError(_('"%s" is not a valid template section') % section)
if section in self.SECTIONS_NO_DIRECT_ACCESS:
raise KeyError(
_('Section %s can not be accessed directly.') % section)
if section == self.DESCRIPTION:
default = 'No description'
else:
default = {}
return self.t.get(section, default)
[docs] def param_schemata(self):
params = self.t.get(self.PARAMETERS, {}).iteritems()
return dict((name, parameters.Schema.from_dict(schema))
for name, schema in params)
[docs] def parameters(self, stack_identifier, user_params):
return parameters.Parameters(stack_identifier, self,
user_params=user_params)
[docs]def template_mapping():
return {
('HeatTemplateFormatVersion', '2012-12-12'): CfnTemplate,
('AWSTemplateFormatVersion', '2010-09-09'): CfnTemplate,
}