From b3455abcb9e29453c2c0633fb142265506d77731 Mon Sep 17 00:00:00 2001
From: Mike Gerwitz <mike@mikegerwitz.com>
Date: Mon, 23 May 2011 18:32:07 -0400
Subject: [PATCH] Added notice in the event that UglifyJS is unavailable

---
 tools/minify.js | 26 ++++++++++++++++++++++----
 1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/tools/minify.js b/tools/minify.js
index e8ca5db..947d32f 100644
--- a/tools/minify.js
+++ b/tools/minify.js
@@ -6,11 +6,29 @@
  */
 
 // uses UglifyJS
-var parser = require( 'uglify-js' ).parser,
-    uglify = require( 'uglify-js' ).uglify,
+var uglify,
+    FILE_ROOT = '../build/';
 
-    FILE_ROOT = '../build/'
-;
+try
+{
+    // attempt to load UglifyJS
+    var uglify = require( 'uglify-js' );
+}
+catch ( e )
+{
+    // if there's a problem loading it, let the user know what they probably
+    // need to do
+    process.stderr.write(
+        "Unable to located UglifyJS. Please run:\n\n" +
+        "  $ npm install uglify-js\n\n" +
+        "and then try again.\n"
+    );
+
+    process.exit( 1 );
+}
+
+var parser = uglify.parser,
+    uglify = uglify.uglify;
 
 // we should receive the file via stdin
 var data = '';