GraphQL Schema Printer

updateSchema.js

#!/usr/bin/env babel-node --optional es7.asyncFunctions
/**
 * This file provided by Facebook is for non-commercial testing and evaluation
 * purposes only.  Facebook reserves all rights not expressly granted.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

import fs from 'fs';
import path from 'path';
import { schema } from '../graphql/schema';
import { graphql } from 'graphql';
import { introspectionQuery, printSchema } from 'graphql/utilities';

// Save JSON of full schema introspection for Babel Relay Plugin to use
(async () => {
  const result = await (graphql(schema, introspectionQuery));
  if (result.errors) {
    console.error(
      'ERROR introspecting schema: ',
      JSON.stringify(result.errors, null, 2)
    );
  } else {
    fs.writeFileSync(
      path.join(__dirname, '../data/schema.json'),
      JSON.stringify(result, null, 2)
    );

    process.exit(0);
  }
})();

// Save user readable type system shorthand of schema
fs.writeFileSync(
  path.join(__dirname, '../data/schema.graphql'),
  printSchema(schema)
);