Source code for yardstick.common.template_format

#    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
#    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.

# yardstick: this file is copied from python-heatclient and slightly modified

import json
import yaml

if hasattr(yaml, 'CSafeLoader'):
    yaml_loader = yaml.CSafeLoader
    yaml_loader = yaml.SafeLoader

if hasattr(yaml, 'CSafeDumper'):
    yaml_dumper = yaml.CSafeDumper
    yaml_dumper = yaml.SafeDumper

def _construct_yaml_str(self, node):
    # Override the default string handling function
    # to always return unicode objects
    return self.construct_scalar(node)
yaml_loader.add_constructor(u',2002:str', _construct_yaml_str)
# Unquoted dates like 2013-05-23 in yaml files get loaded as objects of type
# which causes problems in API layer when being processed by
# openstack.common.jsonutils. Therefore, make unicode string out of timestamps
# until jsonutils can handle dates.

[docs]def parse(tmpl_str): '''Takes a string and returns a dict containing the parsed structure. This includes determination of whether the string is using the JSON or YAML format. ''' if tmpl_str.startswith('{'): tpl = json.loads(tmpl_str) else: try: tpl = yaml.load(tmpl_str, Loader=yaml_loader) except yaml.YAMLError as yea: raise ValueError(yea) else: if tpl is None: tpl = {} # Looking for supported version keys in the loaded template if not ('HeatTemplateFormatVersion' in tpl or 'heat_template_version' in tpl or 'AWSTemplateFormatVersion' in tpl): raise ValueError("Template format version not found.") return tpl