pass file data as callback second argument.

README.md

@@ -27,7 +27,7 @@ archive.on('error', function(err) {
 // pipe archive where you want it (ie fs, http, etc)
 // listen to the destination's end, close, or finish event
 
-archive.entry('string contents', { name: 'string.txt' }, function(err) {
+archive.entry('string contents', { name: 'string.txt' }, function(err, file) {
   if (err) throw err;
 
   archive.finalize();
@@ -36,7 +36,7 @@ archive.entry('string contents', { name: 'string.txt' }, function(err) {
 
 ### Instance API
 
-#### entry(input, data, callback(err))
+#### entry(input, data, callback(err, file))
 
 Appends an input source (text string, buffer, or stream) to the instance. When the instance has received, processed, and emitted the input, the callback is fired.
 

lib/zip-stream.js

@@ -74,7 +74,7 @@ ZipStream.prototype._appendBuffer = function(source, data, callback) {
 
     self._afterAppend(file);
 
-    callback(null);
+    callback(null, file);
   }
 
   if (file.store || source.length === 0) {
@@ -87,7 +87,9 @@ ZipStream.prototype._appendBuffer = function(source, data, callback) {
     onend();
   } else {
     var processStream = self._newProcessStream(file.store);
-    processStream.once('error', callback);
+    processStream.once('error', function(err) {
+      callback(err, file);
+    });
 
     processStream.once('end', function() {
       file.crc32 = processStream.digest;
@@ -116,11 +118,13 @@ ZipStream.prototype._appendStream = function(source, data, callback) {
 
     self._afterAppend(file);
 
-    callback(null);
+    callback(null, file);
   }
 
   var processStream = self._newProcessStream(file.store);
-  processStream.once('error', callback);
+  processStream.once('error', function(err) {
+    callback(err, file);
+  });
 
   processStream.once('end', function() {
     file.crc32 = processStream.digest;