Initial Save

node_modules/graphql/utilities/introspectionFromSchema.js.flow

@@ -0,0 +1,33 @@
+// @flow strict
+
+import invariant from '../jsutils/invariant';
+import isPromise from '../jsutils/isPromise';
+
+import { parse } from '../language/parser';
+import { execute } from '../execution/execute';
+import { type GraphQLSchema } from '../type/schema';
+
+import {
+  type IntrospectionQuery,
+  type IntrospectionOptions,
+  getIntrospectionQuery,
+} from './introspectionQuery';
+
+/**
+ * Build an IntrospectionQuery from a GraphQLSchema
+ *
+ * IntrospectionQuery is useful for utilities that care about type and field
+ * relationships, but do not need to traverse through those relationships.
+ *
+ * This is the inverse of buildClientSchema. The primary use case is outside
+ * of the server context, for instance when doing schema comparisons.
+ */
+export function introspectionFromSchema(
+  schema: GraphQLSchema,
+  options?: IntrospectionOptions,
+): IntrospectionQuery {
+  const queryAST = parse(getIntrospectionQuery(options));
+  const result = execute(schema, queryAST);
+  invariant(!isPromise(result) && !result.errors && result.data);
+  return (result.data: any);
+}