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# All Rights Reserved.
#
# 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 os
from oslo_serialization import jsonutils
def _resolve_ref(ref, base_path):
file_path, _, json_path = ref.partition('#')
if json_path:
raise NotImplementedError('JSON refs with JSON path after the "#" is '
'not yet supported')
path = os.path.join(base_path, file_path)
# binary mode is needed due to bug/1515231
with open(path, 'r+b') as f:
ref_value = jsonutils.load(f)
base_path = os.path.dirname(path)
res = resolve_refs(ref_value, base_path)
return res
def resolve_refs(obj_with_refs, base_path):
if isinstance(obj_with_refs, list):
for i, item in enumerate(obj_with_refs):
obj_with_refs[i] = resolve_refs(item, base_path)
elif isinstance(obj_with_refs, dict):
if '$ref' in obj_with_refs.keys():
ref = obj_with_refs.pop('$ref')
resolved_ref = _resolve_ref(ref, base_path)
# the rest of the ref dict contains overrides for the ref. Resolve
# refs in the overrides then apply those overrides recursively
# here.
resolved_overrides = resolve_refs(obj_with_refs, base_path)
_update_dict_recursively(resolved_ref, resolved_overrides)
return resolved_ref
else:
for key, value in obj_with_refs.items():
obj_with_refs[key] = resolve_refs(value, base_path)
else:
# scalar, nothing to do
pass
return obj_with_refs
def _update_dict_recursively(d, update):
"""Update dict d recursively with data from dict update"""
for k, v in update.items():
if k in d and isinstance(d[k], dict) and isinstance(v, dict):
_update_dict_recursively(d[k], v)
else:
d[k] = v
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