From 8c793254780235d39a2fc8d8620431e93666fbd5 Mon Sep 17 00:00:00 2001
From: JP Richardson <jprichardson@gmail.com>
Date: Sat, 27 Jun 2015 08:16:11 -0500
Subject: [PATCH] lib/util/utimes: create hasMillisRes() (async)

---
 lib/util/__tests__/utimes.test.js |  4 ++--
 lib/util/utimes.js                | 29 ++++++++++++++++++++++++++---
 2 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/lib/util/__tests__/utimes.test.js b/lib/util/__tests__/utimes.test.js
index 80bc6e0..aee9ca2 100644
--- a/lib/util/__tests__/utimes.test.js
+++ b/lib/util/__tests__/utimes.test.js
@@ -19,9 +19,9 @@ describe('utimes', function () {
     fse.emptyDir(TEST_DIR, done)
   })
 
-  describe('hasMillisRes()', function () {
+  describe('hasMillisResSync()', function () {
     it('should return a boolean indicating whether it has support', function () {
-      var res = utimes.hasMillisRes()
+      var res = utimes.hasMillisResSync()
       assert.equal(typeof res, 'boolean')
 
       // HFS => false
diff --git a/lib/util/utimes.js b/lib/util/utimes.js
index 98ddd93..248cebc 100644
--- a/lib/util/utimes.js
+++ b/lib/util/utimes.js
@@ -1,13 +1,13 @@
 var fs = require('graceful-fs')
 var path = require('path')
 
-var HAS_MILLIS_RES = hasMillisRes()
+var HAS_MILLIS_RES = hasMillisResSync()
 
 // HFS, ext{2,3}, FAT do not, Node.js v0.10 does not
-function hasMillisRes () {
+function hasMillisResSync () {
   // 550 millis past UNIX epoch
   var d = new Date(1435410243862)
-  var tmpfile = path.join(require('os').tmpdir(), 'millis-test')
+  var tmpfile = path.join(require('os').tmpdir(), 'millis-test-sync')
   fs.writeFileSync(tmpfile, 'https://github.com/jprichardson/node-fs-extra/pull/141')
   var fd = fs.openSync(tmpfile, 'r+')
   fs.futimesSync(fd, d, d)
@@ -15,6 +15,28 @@ function hasMillisRes () {
   return fs.statSync(tmpfile).mtime > 1435410243000
 }
 
+function hasMillisRes (callback) {
+  // 550 millis past UNIX epoch
+  var d = new Date(1435410243862)
+  var tmpfile = path.join(require('os').tmpdir(), 'millis-test')
+  fs.writeFile(tmpfile, 'https://github.com/jprichardson/node-fs-extra/pull/141', function (err) {
+    if (err) return callback(err)
+    fs.open(tmpfile, 'r+', function (err, fd) {
+      if (err) return callback(err)
+      fs.futimes(fd, d, d, function (err) {
+        if (err) return callback(err)
+        fs.close(fd, function (err) {
+          if (err) return callback(err)
+          fs.stat(tmpfile, function (err, stats) {
+            if (err) return callback(err)
+            callback(null, stats.mtime > 1435410243000)
+          })
+        })
+      })
+    })
+  })
+}
+
 function timeRemoveMillis (timestamp) {
   if (typeof timestamp === 'number') {
     return Math.floor(timestamp / 1000) * 1000
@@ -38,6 +60,7 @@ function utimesMillis (path, atime, mtime, callback) {
 
 module.exports = {
   hasMillisRes: hasMillisRes,
+  hasMillisResSync: hasMillisResSync,
   timeRemoveMillis: timeRemoveMillis,
   utimesMillis: utimesMillis,
   HAS_MILLIS_RES: HAS_MILLIS_RES