Generate GraphQL Schema and Docs programmatically (adopted from Relay github)

generateSchema.js

import fs from 'fs';
import path from 'path';
import { graphql } from 'graphql';
import { introspectionQuery } from 'graphql/utilities';
import schema from './src/schema/index';

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

package.json

{
  "scripts": {
    "generate-schema": "babel-node ./generateSchema.js",
    "generate-schema-doc": "npm run clean && npm run generate-schema && graphdoc -s ./schema.json -o ./doc"
  },
  "dependencies": {
    "graphql": "~0.11.7"
  },
  "devDependencies": {
    "@2fd/graphdoc": "^2.4.0"
  }
}