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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 json 

 

import six 

import yaml 

 

from magnum.openstack.common._i18n import _ 

 

 

23if hasattr(yaml, 'CSafeDumper'): 

    yaml_dumper = yaml.CSafeDumper 

else: 

    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) 

 

 

def parse(manifest_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 not manifest_str: 

        msg = _("'manifest' can't be empty") 

        raise ValueError(msg) 

    if manifest_str.startswith('{'): 

        manifest = json.loads(manifest_str) 

    else: 

        try: 

            manifest = yaml.safe_load(manifest_str) 

        except yaml.YAMLError as yea: 

            yea = six.text_type(yea) 

            msg = _('Error parsing manifest: %s') % yea 

            raise ValueError(msg) 

        else: 

53            if manifest is None: 

                manifest = {} 

 

    if not isinstance(manifest, dict): 

        raise ValueError(_('The manifest is not a JSON object ' 

                           'or YAML mapping.')) 

    # TODO(yuanying): check manifest version 

    return manifest