1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
# 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 shade._heat 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
|
