From 00fdcf4e58f95ce252e79151088c26a3bcecd937 Mon Sep 17 00:00:00 2001
From: Peter Bacon Darwin <pete@bacondarwin.com>
Date: Fri, 3 Mar 2017 11:17:19 +0000
Subject: [PATCH] build: allow check-environment.js to be run directly

---
 tools/check-environment.js | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tools/check-environment.js b/tools/check-environment.js
index abeee1ca49..3f388e5554 100644
--- a/tools/check-environment.js
+++ b/tools/check-environment.js
@@ -53,6 +53,17 @@ try {
   printWarning(issues);
 }
 
+if (require.main === module) {
+  // we are running this script directly so just run checkEnvironment against the main angular
+  // package.json
+  var engines = require(__dirname + '/../package.json').engines;
+  checkEnvironment({
+    requiredNodeVersion: engines.node,
+    requiredNpmVersion: engines.npm,
+    requiredYarnVersion: engines.yarn
+  });
+}
+
 function checkEnvironment(reqs) {
   exec('npm --version', function(npmErr, npmStdout) {
     exec('yarn --version', function(yarnErr, yarnStdout) {