From d8ddbcf9399359ecc95480aec12d94686e0cc8ef Mon Sep 17 00:00:00 2001
From: zepumph <michael.kauzmann@colorado.edu>
Date: Thu, 24 Oct 2019 15:10:45 -0800
Subject: [PATCH] error out if using node less than 8.10,
 https://github.com/phetsims/chipper/issues/737

---
 js/grunt/Gruntfile.js        |  1 +
 js/grunt/checkNodeVersion.js | 17 +++++++++++++++++
 2 files changed, 18 insertions(+)
 create mode 100644 js/grunt/checkNodeVersion.js

diff --git a/js/grunt/Gruntfile.js b/js/grunt/Gruntfile.js
index f3e266f1..ae99d1c9 100644
--- a/js/grunt/Gruntfile.js
+++ b/js/grunt/Gruntfile.js
@@ -11,6 +11,7 @@
 
 // grunt tasks
 const assert = require( 'assert' );
+require( './checkNodeVersion' );
 const checkoutDependencies = require( '../common/checkoutDependencies' );
 const checkoutMaster = require( '../common/checkoutMaster' );
 const checkoutMasterAll = require( './checkoutMasterAll' );
diff --git a/js/grunt/checkNodeVersion.js b/js/grunt/checkNodeVersion.js
new file mode 100644
index 00000000..71415d57
--- /dev/null
+++ b/js/grunt/checkNodeVersion.js
@@ -0,0 +1,17 @@
+// Copyright 2019, University of Colorado Boulder
+
+/**
+ * Error out if Node version is out of date. Uses process.version
+ *
+ * @author Michael Kauzmann (PhET Interactive Simulations)
+ */
+
+'use strict';
+
+// constants
+const NODE_VERSION_STRING_PARTS = process.version.replace( 'v', '' ).split( '.' );
+const NODE_MAJOR_VERSION = parseInt( NODE_VERSION_STRING_PARTS[ 0 ], 10 );
+const NODE_MINOR_VERSION = parseInt( NODE_VERSION_STRING_PARTS[ 1 ], 10 );
+if ( NODE_MAJOR_VERSION < 8 || ( NODE_MAJOR_VERSION === 8 && NODE_MINOR_VERSION < 10 ) ) {
+  throw new Error( 'Node 8.10 or greater is needed to run PhET build tools' );
+}