From a84a7457c1e4f916b097127ed002c45a875e0aa6 Mon Sep 17 00:00:00 2001
From: Volker Mische <volker.mische@gmail.com>
Date: Wed, 9 Jan 2019 14:40:34 +0100
Subject: [PATCH] Revert "chore: remove the conditional"

This reverts commit 01098074ddaf564250d33dde89703b7c9dfc0ece.

Fixes https://github.com/ipfs/js-ipfs/issues/1810.
---
 src/builder/builder.js | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/builder/builder.js b/src/builder/builder.js
index 237031a..f4f9ade 100644
--- a/src/builder/builder.js
+++ b/src/builder/builder.js
@@ -24,8 +24,7 @@ const defaultOptions = {
   rawLeaves: false,
   hashAlg: 'sha2-256',
   leafType: 'file',
-  cidVersion: 0,
-  progress: () => {}
+  cidVersion: 0
 }
 
 module.exports = function builder (createChunker, ipld, createReducer, _options) {
@@ -107,8 +106,10 @@ module.exports = function builder (createChunker, ipld, createReducer, _options)
     pull(
       file.content,
       chunker,
-      through(buffer => {
-        options.progress(buffer.length)
+      through(chunk => {
+        if (options.progress && typeof options.progress === 'function') {
+          options.progress(chunk.byteLength)
+        }
       }),
       paraMap((buffer, callback) => {
         waterfall([