correctly generate dest path if only a directory is passed

Author: dciccale

index.js

@@ -39,9 +39,9 @@ module.exports = function (files, options) {
 
   html = new HTMLProcessor(options);
 
-  files.src.forEach(function (filepath) {
-    var content = html.process(filepath);
-    var dest = getOutputPath(filepath);
+  files.src.forEach(function (filePath) {
+    var content = html.process(filePath);
+    var dest = getOutputPath(filePath);
 
     fs.writeFileSync(dest, content);
     console.log('File', '"' + dest + '"', 'created.');
@@ -51,17 +51,24 @@ module.exports = function (files, options) {
     }
   });
 
-  function getOutputPath(filepath) {
+  function getOutputPath(filePath) {
     var dest = files.dest;
     var ext;
 
     if (!dest) {
-      ext = path.extname(filepath);
-      dest = path.basename(filepath, ext) + '.processed' + ext;
+      dest = getFileName(filePath, 'processed');
     } else if (!path.extname(dest)) {
-      dest = path.join(dest, filepath);
+      dest = path.join(dest, getFileName(filePath));
     }
 
     return dest;
   }
+
+  function getFileName(filePath, postfix) {
+    var ext = path.extname(filePath);
+    return path.basename(filePath, ext) + (postfix || '') + ext;
+  }
+
+  // return processor instance
+  return html;
 };