nextbus-graphql/src/scripts/updateSchema.js

A GraphQL interface to the NextBus XML Feed

// @flow

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

// Create lib/ if it doesn't exist
const libDir = path.resolve(__dirname, '../../lib');
try {
  fs.statSync(libDir);
} catch (e) {
  fs.mkdirSync(libDir);
}

// 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(libDir, 'schema.json'),
      JSON.stringify(result, null, 2),
    );
  }
})();

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