81 lines
2.2 KiB
Python
81 lines
2.2 KiB
Python
# Copyright 2019 The Armada Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain 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,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import os
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import pkg_resources
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import re
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import yaml
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# Types
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TYPE_CHART = 'Chart'
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TYPE_CHARTGROUP = 'ChartGroup'
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TYPE_MANIFEST = 'Manifest'
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# Versions
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VERSION_FORMAT = r'^v(\d+)$'
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VERSION_MIN = 1
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VERSION_MAX = 2
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# Creates a mapping between ``metadata.name``: ``data`` where the
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# ``metadata.name`` is the ``schema`` of a manifest and the ``data`` is the
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# JSON schema to be used to validate the manifest in question.
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_SCHEMAS = {}
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class SchemaInfo(object):
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def __init__(self, type, version, data):
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self.type = type
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self.version = version
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self.data = data
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def __eq__(self, other):
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return self.type == other.type and self.version == other.version
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def get_schema_info(name):
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return _SCHEMAS.get(name)
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def _get_schema_info(name, data):
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parts = name.split('/')
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prefix, type, version_string = parts
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version_match = re.search(VERSION_FORMAT, version_string)
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version = int(version_match.group(1))
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return SchemaInfo(type, version, data)
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def _get_schema_dir():
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return pkg_resources.resource_filename('armada', 'schemas')
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def _load_schemas():
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"""Populates ``_SCHEMAS`` with the schemas defined in package
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``armada.schemas``.
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"""
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schema_dir = _get_schema_dir()
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for schema_file in os.listdir(schema_dir):
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with open(os.path.join(schema_dir, schema_file)) as f:
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for schema in yaml.safe_load_all(f):
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name = schema['metadata']['name']
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if name in _SCHEMAS:
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raise RuntimeError(
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'Duplicate schema specified for: %s.' % name)
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_SCHEMAS[name] = _get_schema_info(name, schema['data'])
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# Fill the cache.
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_load_schemas()
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