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""" JSON Schema validation helpers
"""
import json
import os
from pathlib import Path
from jsonschema import Draft7Validator, RefResolver, validators
def validate_with_defaults(obj, schema, resolve=None):
""" Validate a configuration file and fill in defaults (modifies ``obj``)
"""
if resolve:
resolver = RefResolver('file://' + str(resolve) + '/', schema)
else:
resolver = None
# Allow tuple/list as 'array' type
# See: https://github.com/Julian/jsonschema/issues/148
types_ = {'array': (list, tuple)}
validator = DefaultValidatingDraft7Validator(schema, resolver=resolver,
types=types_)
validator.validate(obj)
# Adapted from python-jsonschema FAQ
# https://python-jsonschema.readthedocs.io/en/stable/faq/
def _extend_with_default(validator_class):
validate_properties = validator_class.VALIDATORS["properties"]
def set_defaults(validator, properties, instance, schema):
for property, subschema in properties.items():
if "default" in subschema:
instance.setdefault(property, subschema["default"])
for error in validate_properties(
validator, properties, instance, schema):
yield error
return validators.extend(validator_class, {"properties" : set_defaults})
DefaultValidatingDraft7Validator = _extend_with_default(Draft7Validator)
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