fromString option, use index from argument array for filename instead of "?"

The index allows the caller to map things like parse errors back to the
code chunk where they appeared.

diff --git a/tools/node.js b/tools/node.js
index cbe49e3..2eb9036 100644 (file)
--- a/tools/node.js
+++ b/tools/node.js
@@ -73,13 +73,13 @@ exports.minify = function(files, options) {
     } else {
         if (typeof files == "string")
             files = [ files ];
-        files.forEach(function(file){
+        files.forEach(function(file, i){
             var code = options.fromString
                 ? file
                 : fs.readFileSync(file, "utf8");
             sourcesContent[file] = code;
             toplevel = UglifyJS.parse(code, {
-                filename: options.fromString ? "?" : file,
+                filename: options.fromString ? i : file,
                 toplevel: toplevel
             });
         });