From f699516fdbdc887113bad144b58ee600898a8e93 Mon Sep 17 00:00:00 2001
From: Nick O'Leary <nick.oleary@gmail.com>
Date: Thu, 12 Jan 2017 10:40:04 +0000
Subject: [PATCH] Add node.js version check on startup

---
 red.js     |  5 ++++-
 red/red.js | 10 ++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/red.js b/red.js
index 35da1c71a..e80de12a6 100755
--- a/red.js
+++ b/red.js
@@ -175,7 +175,10 @@ if (parsedArgs.userDir) {
 try {
     RED.init(server,settings);
 } catch(err) {
-    if (err.code == "not_built") {
+    if (err.code == "unsupported_version") {
+        console.log("Unsupported version of node.js:",process.version);
+        console.log("Node-RED requires node.js v4 or later");
+    } else if  (err.code == "not_built") {
         console.log("Node-RED has not been built. See README.md for details");
     } else {
         console.log("Failed to start server:");
diff --git a/red/red.js b/red/red.js
index 52c7ec1ca..32186508c 100644
--- a/red/red.js
+++ b/red/red.js
@@ -27,6 +27,15 @@ var adminApp = null;
 var server = null;
 var apiEnabled = false;
 
+function checkVersion() {
+    var semver = require('semver');
+    if (!semver.satisfies(process.version,">=4.0.0")) {
+        var e = new Error("Unsupported version of node.js");
+        e.code = "unsupported_version";
+        throw e;
+    }
+}
+
 function checkBuild() {
     var editorFile = path.resolve(path.join(__dirname,"..","public","red","red.min.js"));
     try {
@@ -46,6 +55,7 @@ module.exports = {
         }
 
         if (!userSettings.SKIP_BUILD_CHECK) {
+            checkVersion();
             checkBuild();
         }