62 lines
1.9 KiB
Python
62 lines
1.9 KiB
Python
#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import json
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import six
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import yaml
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from magnum.i18n import _
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if hasattr(yaml, 'CSafeDumper'):
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yaml_dumper = yaml.CSafeDumper
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else:
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yaml_dumper = yaml.SafeDumper
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def _construct_yaml_str(self, node):
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# Override the default string handling function
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# to always return unicode objects
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return self.construct_scalar(node)
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def parse(manifest_str):
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'''Takes a string and returns a dict containing the parsed structure.
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This includes determination of whether the string is using the
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JSON or YAML format.
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'''
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if not manifest_str:
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msg = _("'manifest' can't be empty")
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raise ValueError(msg)
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if manifest_str.startswith('{'):
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manifest = json.loads(manifest_str)
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else:
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try:
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manifest = yaml.safe_load(manifest_str)
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except yaml.YAMLError as yea:
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yea = six.text_type(yea)
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msg = _('Error parsing manifest: %s') % yea
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raise ValueError(msg)
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else:
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if manifest is None:
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msg = _("'manifest' can't be empty")
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raise ValueError(msg)
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if not isinstance(manifest, dict):
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raise ValueError(_('The manifest is not a JSON object '
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'or YAML mapping.'))
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# TODO(yuanying): check manifest version
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return manifest
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