From 32232dd30eb331ee0ef401b1ad23e8d8a909c68e Mon Sep 17 00:00:00 2001
From: Howard Yeh <howard@metacircus.com>
Date: Sat, 3 Sep 2016 16:32:39 +0800
Subject: [PATCH] Watch mode should wait for file change. (T7411)

---
 packages/babel-cli/src/babel/dir.js  | 6 +++++-
 packages/babel-cli/src/babel/file.js | 6 +++++-
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/packages/babel-cli/src/babel/dir.js b/packages/babel-cli/src/babel/dir.js
index 6bdb2fc194..362ce10858 100644
--- a/packages/babel-cli/src/babel/dir.js
+++ b/packages/babel-cli/src/babel/dir.js
@@ -71,7 +71,11 @@ module.exports = function (commander, filenames) {
     _.each(filenames, function (dirname) {
       let watcher = chokidar.watch(dirname, {
         persistent: true,
-        ignoreInitial: true
+        ignoreInitial: true,
+        awaitWriteFinish: {
+          stabilityThreshold: 50,
+          pollInterval: 10,
+        }
       });
 
       _.each(["add", "change"], function (type) {
diff --git a/packages/babel-cli/src/babel/file.js b/packages/babel-cli/src/babel/file.js
index 36195ca722..8f852216b4 100644
--- a/packages/babel-cli/src/babel/file.js
+++ b/packages/babel-cli/src/babel/file.js
@@ -138,7 +138,11 @@ module.exports = function (commander, filenames, opts) {
       let chokidar = util.requireChokidar();
       chokidar.watch(filenames, {
         persistent: true,
-        ignoreInitial: true
+        ignoreInitial: true,
+        awaitWriteFinish: {
+          stabilityThreshold: 50,
+          pollInterval: 10,
+        }
       }).on("all", function (type, filename) {
         if (util.shouldIgnore(filename) || !util.canCompile(filename, commander.extensions)) return;