updated validate script to use referencing library

code/validate.py

@@ -3,10 +3,7 @@
 import os.path
 import json
 import jsonschema
-
-
-if int(jsonschema.__version__.split('.', 1)[0]) < 3:
-    raise RuntimeError("Please update jsonschema to 3.0.0 or later.")
+from referencing import Registry, Resource
 
 
 schema_uri_prefix = 'https://burrito.bible/schema/'
@@ -20,20 +17,16 @@ def http_handler(uri):
     assert uri.startswith(schema_uri_prefix)
     path = uri[len(schema_uri_prefix):].replace('/', os.sep)
     path = os.path.join(schema_dir, path)
-    return json.load(open(path, encoding='utf-8'))
+    return Resource.from_contents(json.load(open(path, encoding='utf-8')))
 
 
-resolver = jsonschema.RefResolver(
-    handlers={'http': http_handler, 'https': http_handler},
-    referrer=schema,
-    base_uri='file://' + schema_dir.replace('\\', '/') + '/',
-)
+registry = Registry(retrieve=http_handler)
 
 
 def validate(input):
     "Validates the given file-like object against the schema."
     data = json.load(input)
-    jsonschema.validate(data, schema, resolver=resolver)
+    jsonschema.validate(data, schema, registry=registry)
 
 
 if __name__ == '__main__':