add whitespace option and move util.errorWithNode to File

lib/6to5/file.js

@@ -4,6 +4,7 @@ var SHEBANG_REGEX = /^\#\!.*/;
 
 var transform = require("./transform");
 var generate  = require("./generator");
+var acorn     = require("acorn-6to5");
 var util      = require("./util");
 var b         = require("./builders");
 var _         = require("lodash");
@@ -21,11 +22,12 @@ File.normaliseOptions = function (opts) {
   opts = opts || {};
 
   _.defaults(opts, {
-    blacklist: [],
-    whitelist: [],
-    sourceMap: false,
-    filename:  "unknown",
-    modules:   "common"
+    whitespace: true,
+    blacklist:  [],
+    whitelist:  [],
+    sourceMap:  false,
+    filename:   "unknown",
+    modules:    "common"
   });
 
   _.defaults(opts, {
@@ -78,10 +80,25 @@ File.prototype.addDeclaration = function (name) {
   return uid;
 };
 
+File.prototype.errorWithNode = function (node, msg) {
+  var loc
+
+  if (node.loc) {
+    loc = node.loc.start;
+  } else {
+    loc = acorn.getLineInfo(this.code, node.start);
+  }
+
+  var err = new SyntaxError("Line " + loc.line + ": " + msg);
+  err.lineNumber = loc.line;
+  err.column = loc.column;
+  return err;
+};
+
 File.prototype.parse = function (code) {
   var self = this;
-  this.code = code;
 
+  this.code = code;
   code = this.parseShebang(code);
 
   return util.parse(this.opts, code, function (tree) {