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node_modules/graphql/utilities/introspectionFromSchema.mjs

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+import invariant from '../jsutils/invariant';
+import isPromise from '../jsutils/isPromise';
+import { parse } from '../language/parser';
+import { execute } from '../execution/execute';
+import { 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, options) {
+  var queryAST = parse(getIntrospectionQuery(options));
+  var result = execute(schema, queryAST);
+
+  /* istanbul ignore next */
+  !isPromise(result) && !result.errors && result.data || invariant(0);
+  return result.data;
+}