Create a new GraphQL schema.json file for GraphQLHub

graphqlHub-createSchemaFile.js

#!/usr/bin/env node_modules/.bin/babel-node
// when converting to a shell script, uncomment the line above

// This creates a new   schema.json  file which is needed, for using with a 
// relay client


// use it together within
//
//    https://github.com/clayallsopp/graphqlhub
 
var fs = require('fs');
var path = require('path');
var graphql = require('graphql').graphql;
var introspectionQuery = require('graphql/utilities').introspectionQuery;

import { GraphQLSchema } from 'graphql';
import { GraphQLHub } from './graphqlhub-schemas';

let schema = new GraphQLSchema({
    query    : GraphQLHub.QueryObjectType,
    mutation : GraphQLHub.MutationsType,
});

graphql(schema, introspectionQuery).then(function(result) {
  if (result.errors) return console.error('ERRRROR!', result.errors);
  fs.writeFileSync(path.join(__dirname, './schema.json'), JSON.stringify(result, null, 2))
});