text: /**
   * Copyright (c) 2015-present, Facebook, Inc.
   *
   * This source code is licensed under the MIT license found in the
   * LICENSE file in the root directory of this source tree.
   *
   * 
   */
  
  import invariant from '../jsutils/invariant';
  import { getIntrospectionQuery } from './introspectionQuery';
  import { GraphQLSchema } from '../type/schema';
  import { execute } from '../execution/execute';
  import { parse } from '../language/parser';
  
  
  /**
   * 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);
    !(!result.then && !result.errors && result.data) ? invariant(0) : void 0;
    return result.data;
  }