Add custom port CLI supoort

README.md

@@ -40,6 +40,8 @@ Start the GraphQL server on localhost, port 3000.
 json-graphql-server db.js
 ```
 
+To use a port other than port 3000, you can run `json-graphql-server db.js -p <your port here>`
+
 Now you can query your data in graphql. For instance, to issue the following query:
 
 ```graphql
@@ -533,7 +535,7 @@ Deploy with Heroku or Next.js.
 
 ## Roadmap
 
-* CLI options (port, https, watch, delay, custom schema)
+* CLI options (https, watch, delay, custom schema)
 * Subscriptions
 * Client-side mocking (à la [FakeRest](https://github.com/marmelab/FakeRest))
 

bin/json-graphql-server.js

@@ -10,12 +10,19 @@ var data = require(path.join(process.cwd(), dataFilePath));
 var PORT = process.env.NODE_PORT || 3000;
 var app = express();
 
+process.argv.forEach((arg, index) => {
+  // allow a custom port via CLI
+  if (arg === '--p' && process.argv.length > index + 1) {
+    PORT = process.argv[index + 1];
+  }
+});
+
 app.use(cors());
 app.use('/', JsonGraphqlServer(data));
 app.listen(PORT);
 var msg = `GraphQL server running with your data at http://localhost:${PORT}/`;
 console.log(msg); // eslint-disable-line no-console
 
 process.on('unhandledRejection', (reason, p) => {
-    console.log('Unhandled Rejection at: Promise', p, 'reason:', reason);
+  console.log('Unhandled Rejection at: Promise', p, 'reason:', reason);
 });