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# 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.
import yaml
from heatclient._i18n import _
from heatclient.common import template_format
SECTIONS = (
PARAMETER_DEFAULTS, PARAMETERS, RESOURCE_REGISTRY,
ENCRYPTED_PARAM_NAMES, EVENT_SINKS,
PARAMETER_MERGE_STRATEGIES
) = (
'parameter_defaults', 'parameters', 'resource_registry',
'encrypted_param_names', 'event_sinks',
'parameter_merge_strategies'
)
def parse(env_str):
"""Takes a string and returns a dict containing the parsed structure.
This includes determination of whether the string is using the
YAML format.
"""
try:
env = yaml.load(env_str, Loader=template_format.yaml_loader)
except yaml.YAMLError:
# NOTE(prazumovsky): we need to return more informative error for
# user, so use SafeLoader, which return error message with template
# snippet where error has been occurred.
try:
env = yaml.load(env_str, Loader=yaml.SafeLoader)
except yaml.YAMLError as yea:
raise ValueError(yea)
else:
if env is None:
env = {}
elif not isinstance(env, dict):
raise ValueError(_('The environment is not a valid '
'YAML mapping data type.'))
for param in env:
if param not in SECTIONS:
raise ValueError(_('environment has wrong section "%s"') % param)
return env
def default_for_missing(env):
"""Checks a parsed environment for missing sections."""
for param in SECTIONS:
if param not in env and param != PARAMETER_MERGE_STRATEGIES:
if param in (ENCRYPTED_PARAM_NAMES, EVENT_SINKS):
env[param] = []
else:
env[param] = {}
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