fix syncing utimes if copied files #268

nalajcie · 2016-02-01T14:08:57Z

fs.utimesSync saves times with one second precision, while fs.statSync gives us microsecond precision.

This makes utimes not synchronized on filesystems with sub-second atime/ctime/mtime precision.

Upgraded to use newer fs.futimesSync interface providing correct precision.

Fixes #257.

XhmikosR · 2016-02-01T16:20:48Z

Doesn't seem to work on Windows.


> grunt-contrib-copy@0.8.2 test C:\Users\xmr\Desktop\grunt\grunt-contrib-copy
> grunt test

Running "jshint:all" (jshint) task
>> 3 files lint free.

Running "clean:test" (clean) task
>> 1 path cleaned.

Running "copy:main" (copy) task
Warning: EPERM: operation not permitted, futime Use --force to continue.

Aborted due to warnings.
npm ERR! Test failed.  See above for more details.

C:\Users\xmr\Desktop\grunt\grunt-contrib-copy>

nalajcie · 2016-02-01T22:53:21Z

Fixed file open mode for windows platform (it requires 'r+' mode to be able to change utimes, linux requires dirs to be opened with 'r' only).

Unfortunately, the tests will not work on windows platform:

chmod on windows is not working as expected (detailed comment in the source: https://github.com/nodejs/node/blob/master/deps/uv/src/win/fs.c#L1064) - probably the test should be disabled or changed to be less restrictive on windows platform
timestamp will not have sub-second precision due to bug in nodejs (issue: Windows: Setting fs.futimes{Sync} subsecond (millisecond) precision? nodejs/node#2069)

XhmikosR · 2016-02-06T07:23:44Z

We could skip the test on Windows as long as things work even without the subsecond precision.

sindresorhus · 2016-02-07T05:49:54Z

tasks/copy.js

@@ -14,6 +14,7 @@ module.exports = function(grunt) {
  var fs = require('fs');
  var chalk = require('chalk');
  var fileSyncCmp = require('file-sync-cmp');
+  var isWindows = /^win/.test(process.platform);


Should be: var isWindows = process.platform === 'win32'; And yes, it's win32 for 64-bit too.

XhmikosR · 2016-02-23T22:41:24Z

@shama @vladikoff: any ideas how we should proceed with this?

shama · 2016-02-23T23:57:39Z

I'm good with skipping that test on Windows for now and merging this.

XhmikosR · 2016-02-24T17:01:31Z

@nalajcie: can you rebase and squash the patches? Maybe leave nalajcie@99dded8 as a separate one though.

fs.utimesSync saves times with one second precision, while fs.statSync gives us microsecond precision. This makes utimes not synchronized on filesystems with sub-second atime/ctime/mtime precision. Upgraded to use newer fs.futimesSync interface providing correct precision.

This test will not pass until it would be fixed in nodejs See: nodejs/node#2069

fix syncing utimes if copied files

XhmikosR · 2016-02-25T06:01:24Z

Thanks!

krnlde · 2016-03-14T12:04:48Z

So the issue on windows will persist?

shama · 2016-03-14T15:38:27Z

@krnlde This is an issue with our testing on Windows. Are you running into a syncing utime issue on Windows?

krnlde · 2016-03-14T16:21:48Z

Yes. I updated to 1.0.0 today but that didn't help. There are also a few tickets in grunt newer. They are not sure where it comes from. And so am I.

For the record:

Running 'grunt newer:jshint' causes the full jshint task to run tschaub/grunt-newer#39
Simply doesn't work with copy task tschaub/grunt-newer#84
Does not work with grunt-contrib-copy due to the timestamp precision disagreement tschaub/grunt-newer#86

tschaub · 2016-03-15T16:46:27Z

@krnlde if you can provide a repo that includes the minimum needed to reproduce your problem, that would be helpful.

I tried https://github.com/giovannipds/grunt-newer-copy-test and this works as expected on OS X with grunt-contrib-copy@0.8.2. I'd be interested to know if others can reproduce the problem with that repo outside Windows.

It would also be good to know if the changes in grunt-contrib-copy@1.0.0 make a difference on Windows.

krnlde · 2016-04-14T11:21:18Z

Hey @tschaub sorry I missed your response. As stated in tschaub/grunt-newer#86 it should not be possible to reproduce this outside Windows. They (you) implemented a tolerance option to workaround this problem, but a definitive solution would of course be better.

Regarding the repo to reproduce the behavior (on Windows): we are using it in https://github.com/micromata/bootstrap-kickstart . Unfortunately this is not the minimum needed setup you requested. But I don't have time to create one right now. Does this work for you anyway?

simevo · 2017-05-02T09:15:51Z

Hi, while testing this module as part of the debian packaging effort, we noticed timestamp failures on i386 and armhf architectures. This is on:

Linux with kernel 4.9.0
ext4 filesystem
nodejs v4.8.2

For more details see: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=861515
Is there anything we should try to pinpoint the issue ?

XhmikosR · 2017-05-02T09:22:36Z

@simevo: the issue shouldn't happen in the latest release. So if it still happens, there must be a difference in how the OS handles times. The main change in this PR is 217819f#diff-951068604e1c942635e6a1f96a88994dL122

simevo · 2017-05-02T10:19:43Z

We're on grunt-contrib-copy v1.0.0 and we have the commit you mention. I have reproduced the issue on a i386 lxc container running debian sid within a amd64 debian host running strecth, as follows:

apt install wget xz-utils git
cd /opt
wget https://nodejs.org/download/release/v4.8.2/node-v4.8.2-linux-x86.tar.xz
xz -d node-v4.8.2-linux-x86.tar.xz
tar xf node-v4.8.2-linux-x86.tar
rm node-v4.8.2-linux-x86.tar
echo 'export PATH=/opt/node-v4.8.2-linux-x86/bin:$PATH' >> ~/.bashrc
source ~/.bashrc
cd
git clone https://github.com/gruntjs/grunt-contrib-copy.git
cd grunt-contrib-copy
npm install grunt chalk file-sync-cmp jshint grunt-contrib-jshint grunt-contrib-clean grunt-contrib-nodeunit grunt-contrib-internal
grunt test

this is what I get:

Running "nodeunit:tests" (nodeunit) task
Testing copy_test.js.......F.
>> copy - timestampEqual
>> Error: 1493719861389 == 1493719861494
>>   at Object.exports.copy.timestampEqual (test/copy_test.js:92:10)
>>   at processImmediate [as _immediateCallback] (timers.js:396:17)

>> copy - timestampEqual
>> Error: 1493719861389 == 1493719861494
>>   at Object.exports.copy.timestampEqual (test/copy_test.js:93:10)
>>   at processImmediate [as _immediateCallback] (timers.js:396:17)

Warning: 2/17 assertions failed (19ms) Use --force to continue.

additional info:

mount | grep ' on / '
/dev/sda1 on / type btrfs (rw,relatime,ssd,space_cache,subvolid=2373,subvol=/var/lib/lxc/debian10_32_packaging/rootfs)

uname -a
Linux debian10_32_packaging 4.9.0-2-amd64 #1 SMP Debian 4.9.18-1 (2017-03-30) i686 GNU/Linux

node -v
v4.8.2

XhmikosR · 2017-05-02T10:57:31Z

What happens with a newer node version?

…

On May 2, 2017 13:19, "simevo" ***@***.***> wrote: We're on grunt-contrib-copy v1.0.0 and we have the commit you mention. I have reproduced the issue on a i386 lxc container running debian sid within a amd64 debian host running strecth, as follows: apt install wget xz-utils git cd /opt wget https://nodejs.org/download/release/v4.8.2/node-v4.8.2-linux-x86.tar.xz xz -d node-v4.8.2-linux-x86.tar.xz tar xf node-v4.8.2-linux-x86.tar rm node-v4.8.2-linux-x86.tar echo 'export PATH=/opt/node-v4.8.2-linux-x86/bin:$PATH' >> ~/.bashrc source ~/.bashrc cd git clone https://github.com/gruntjs/grunt-contrib-copy.git cd grunt-contrib-copy npm install grunt chalk file-sync-cmp jshint grunt-contrib-jshint grunt-contrib-clean grunt-contrib-nodeunit grunt-contrib-internal grunt test this is what I get: Running "nodeunit:tests" (nodeunit) task Testing copy_test.js.......F. >> copy - timestampEqual >> Error: 1493719861389 == 1493719861494 >> at Object.exports.copy.timestampEqual (test/copy_test.js:92:10) >> at processImmediate [as _immediateCallback] (timers.js:396:17) >> copy - timestampEqual >> Error: 1493719861389 == 1493719861494 >> at Object.exports.copy.timestampEqual (test/copy_test.js:93:10) >> at processImmediate [as _immediateCallback] (timers.js:396:17) Warning: 2/17 assertions failed (19ms) Use --force to continue. — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#268 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAVVtZYH0fVbS3kGagE7OFygbAodY_xpks5r1wNAgaJpZM4HQkPq> .

simevo · 2017-05-02T11:10:53Z

node -v
v6.10.2

I tear down the grunt-contrib-copy dir and pull everything again, then node_modules/grunt/bin/grunt test returns:

...
Running "nodeunit:tests" (nodeunit) task
Testing copy_test.js.......F.
>> copy - timestampEqual
>> Error: 1493723278009 == 1493723278082
>>   at Object.timestampEqual (test/copy_test.js:92:10)
>>   at runCallback (timers.js:666:20)
>>   at tryOnImmediate (timers.js:639:5)
>>   at processImmediate [as _immediateCallback] (timers.js:611:5)

>> copy - timestampEqual
>> Error: 1493723278009 == 1493723278082
>>   at Object.timestampEqual (test/copy_test.js:93:10)
>>   at runCallback (timers.js:666:20)
>>   at tryOnImmediate (timers.js:639:5)
>>   at processImmediate [as _immediateCallback] (timers.js:611:5)

Warning: 2/17 assertions failed (19ms) Use --force to continue.

XhmikosR · 2017-05-02T12:18:01Z

Then only the OS is left as a variable here. Not sure what else can be done.

simevo · 2017-05-02T21:40:15Z

To make sure it's not an artifact of lxc or a side-effect of mixing amd64 host (and kernel) with i386 libc &C, I set up an i386 VirtualBox clone. It is reproducible there too. Should I open an issue on this ?

XhmikosR · 2017-05-02T21:42:56Z

If it's something you can consistently reproduce with a clean OS which is the latest stable version, then sure. Weird that Travis CI is passing though.

simevo · 2017-05-03T05:54:56Z

done ! travis is running on arch: "amd64" (64-bit), we're seeing this on i386 (32-bit)

nalajcie mentioned this pull request Feb 1, 2016

Does not work with grunt-newer due to the timestamp precision disagreement #257

Closed

XhmikosR added the bug label Feb 1, 2016

nalajcie mentioned this pull request Feb 2, 2016

Unit tests failing on Node v0.12 #216

Closed

sindresorhus reviewed Feb 7, 2016
View reviewed changes

nalajcie and others added 2 commits February 24, 2016 20:59

tests: disable testing timestamp equity under windows

147a84b

This test will not pass until it would be fixed in nodejs See: nodejs/node#2069

nalajcie force-pushed the master branch from 5473311 to 147a84b Compare February 24, 2016 21:05

XhmikosR added a commit that referenced this pull request Feb 25, 2016

Merge pull request #268 from nalajcie/master

829032d

fix syncing utimes if copied files

XhmikosR merged commit 829032d into gruntjs:master Feb 25, 2016

simevo mentioned this pull request May 3, 2017

timestampEqual test fails on i386 Linux #291

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fix syncing utimes if copied files #268

fix syncing utimes if copied files #268

nalajcie commented Feb 1, 2016

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fix syncing utimes if copied files #268

fix syncing utimes if copied files #268

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