From 71dd09d31b0ae56d848ea923456c829f97cd3d3e Mon Sep 17 00:00:00 2001
From: Erik Yuzwa <erik@erikyuzwa.com>
Date: Sun, 18 Dec 2016 21:54:14 -0700
Subject: [PATCH 1/3] added find-port for hot-server

---
 package.json | 1 +
 1 file changed, 1 insertion(+)

diff --git a/package.json b/package.json
index 8c4011e0..f7c8625a 100644
--- a/package.json
+++ b/package.json
@@ -145,6 +145,7 @@
     "cuid": "^1.3.8",
     "eventify": "^2.0.0",
     "express": "^4.13.4",
+    "find-port": "^2.0.1",
     "fixed-data-table-2": "^0.7.7",
     "highlight.js": "^8.9.1",
     "marked": "^0.3.5",

From 17b5399f08788c59441daf184bc697e8d9801813 Mon Sep 17 00:00:00 2001
From: Erik Yuzwa <erik@erikyuzwa.com>
Date: Sun, 18 Dec 2016 21:54:32 -0700
Subject: [PATCH 2/3] updated server startup to check port(s)

---
 server.js | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/server.js b/server.js
index b8bd2c3c..13566473 100644
--- a/server.js
+++ b/server.js
@@ -3,10 +3,11 @@ import webpack from 'webpack';
 import webpackDevMiddleware from 'webpack-dev-middleware';
 import webpackHotMiddleware from 'webpack-hot-middleware';
 import config from './webpack.dev.config.js';
+import findPort from 'find-port';
 
 const app = express(),
-  compiler = webpack(config),
-  PORT = 3001;
+  compiler = webpack(config);
+let PORT;
 
 app.use(webpackDevMiddleware(compiler, {
   publicPath: config.output.publicPath,
@@ -23,11 +24,21 @@ app.use(webpackHotMiddleware(compiler, {
   heartbeat: 10 * 1000
 }));
 
-app.listen(PORT, 'localhost', err => {
-  if (err) {
-    console.error(err);
-    return;
-  }
+// before binding our server to a port, check each port in the given range
+// to ensure it's available. Upon return, just go ahead with the first element
+findPort('localhost', [3001, 9000, 9001, 9002], (ports) => {
+
+  // make use of the first available port returned
+  PORT = ports[0];
+  app.listen(PORT, 'localhost', err => {
+    if (err) {
+      console.error(err);
+      return;
+    }
+
+    console.log(`Listening at http://localhost:${PORT}`);
+  });
 
-  console.log(`Listening at http://localhost:${PORT}`);
 });
+
+

From 566c1c8c7e5281209c93fe7014cf5219a85dd384 Mon Sep 17 00:00:00 2001
From: Erik Yuzwa <erik@erikyuzwa.com>
Date: Sun, 18 Dec 2016 22:08:03 -0700
Subject: [PATCH 3/3] handle no available ports

---
 server.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/server.js b/server.js
index 13566473..cb67cd3e 100644
--- a/server.js
+++ b/server.js
@@ -28,6 +28,11 @@ app.use(webpackHotMiddleware(compiler, {
 // to ensure it's available. Upon return, just go ahead with the first element
 findPort('localhost', [3001, 9000, 9001, 9002], (ports) => {
 
+  if (ports.length === 0) {
+    console.error(`This is rather embarrasing : none of the given ports are available`);
+    return;
+  }
+
   // make use of the first available port returned
   PORT = ports[0];
   app.listen(PORT, 'localhost', err => {