1 files changed, 27 insertions, 0 deletions
diff --git a/scripts/lib/system.js b/scripts/lib/system.js
new file mode 100644
index 00000000..1a276f8b
--- /dev/null
+++ b/scripts/lib/system.js
@@ -0,0 +1,27 @@
+(function() {
+    Object.defineProperties(system, {
+        "spawn" : 
+        {
+            value : (function() {
+                return function(command, onStdout, onStderr, stdin, environ) {
+                    var stdout, stderr;
+                    return system._spawn(command, 
+                                !onStdout ? null : function(response) {
+                                    var ret;
+                                    stdout = onStdout.call(onStdout, response) || response;
+                                }, 
+                                !onStderr ? null : function(response) {
+                                    var ret;
+                                    stderr = onStderr.call(onStderr, response) || response;
+                                    return ret;
+                                }, 
+                                stdin, environ).then(
+                                    function() { return stdout; }, 
+                                    function() { return stdin; }
+                                );
+                };
+            })()
+        }
+    });
+    Object.freeze(system);
+})();