From e03812ce3285270c8bad5a4e0350bab514eb6ad7 Mon Sep 17 00:00:00 2001
From: guybedford <guybedford@gmail.com>
Date: Mon, 25 Jul 2016 13:54:24 +0200
Subject: [PATCH] provide source maps encoding in Node

---
 lib/global-eval.js | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/lib/global-eval.js b/lib/global-eval.js
index 523668d1..c060b435 100644
--- a/lib/global-eval.js
+++ b/lib/global-eval.js
@@ -4,7 +4,24 @@ var __exec;
 
 (function() {
 
-  var hasBtoa = typeof btoa != 'undefined';
+  var hasBuffer = typeof Buffer != 'undefined';
+  try {
+    if (new Buffer('a').toString('base64') != 'YQ==')
+      hasBuffer = false;
+  }
+  catch(e) {
+    hasBuffer = false;
+  }
+
+  var sourceMapPrefix = '\n//# sourceMappingURL=data:application/json;base64,';
+  function inlineSourceMap(sourceMapString) {
+    if (hasBuffer)
+      return sourceMapPrefix + new Buffer(sourceMapString).toString('base64');
+    else if (typeof btoa != 'undefined')
+      return sourceMapPrefix + btoa(unescape(encodeURIComponent(sourceMap)));
+    else
+      return '';
+  }
 
   function getSource(load, wrap) {
     var lastLineIndex = load.source.lastIndexOf('\n');
@@ -26,7 +43,7 @@ var __exec;
         + (load.source.substr(lastLineIndex, 15) != '\n//# sourceURL=' 
           ? '\n//# sourceURL=' + load.address + (sourceMap ? '!transpiled' : '') : '')
         // add sourceMappingURL if load.metadata.sourceMap is set
-        + (sourceMap && hasBtoa && '\n//# sourceMappingURL=data:application/json;base64,' + btoa(unescape(encodeURIComponent(sourceMap))) || '');
+        + (sourceMap && inlineSourceMap(sourceMap));
   }
 
   var curLoad;