Add options to supply commend and compression level for the zip file

README.md

@@ -56,6 +56,8 @@ been saved to disk.
 * `saveTo` A path to save the buffer to.
 * `filter` A function that is called for all items to determine whether or not they should be added to the zip buffer. Function is called with the `fullPath` and a `stats` object ([fs.Stats](http://nodejs.org/api/fs.html#fs_class_fs_stats)). Return true to add the item; false otherwise. To include files within directories, directories must also pass this filter.
 * `each` A function that is called everytime a file or directory is added to the zip.
+* `comment` A comment to be stored to the zip file.
+* `compressionLevel` The level of compression to use. A number from 1 (best speed) and 9 (best compression). 6 is the default.
 
 ## TODO
 

index.js

@@ -43,7 +43,11 @@ function zipBuffer (rootDir, options, callback) {
 
     callback(null, zip.generate({
       compression: 'DEFLATE',
-      type: 'nodebuffer'
+      type: 'nodebuffer',
+      comment: options.comment,
+      compressionOptions: {
+        level: options.compressionLevel
+      }
     }));
   });