1022082 - jsshell packages are being compressed with wrong file modification dates

Status: RESOLVED WONTFIX

(Core :: JavaScript Engine, defect, P5)

Description

[Ricardo]

Attachment: screenshot for comparison

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:30.0) Gecko/20100101 Firefox/30.0 (Beta/Release)
Build ID: 20140605174243

Steps to reproduce:

Compare jsshell-*.zip from FTP:
ftp://ftp.mozilla.org/pub/mozilla.org/firefox/candidates/29.0.1-candidates/build2/
with
ftp://ftp.mozilla.org/pub/mozilla.org/firefox/candidates/30.0-candidates/build2/
or
ftp://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-mozilla-central/


Actual results:

Files inside the jsshell packages are being compressed with wrong file modification dates.
It happens at least on nightly and beta packages starting with 30b branch.
Last good packages I'm aware are the ones for 29.0.1.


Expected results:

Correct should be what you see in screenshot for 29.0.1.

Comment 1

[Daniel Bodea [:danibodea]]

This issue appears to still occur on the current ftp as well (http://archive.mozilla.org/pub/firefox/nightly/latest-mozilla-central/)
When downloading any jsshell zipped folder and looking into it, it can be noticed that the modification dates of the files are always reset to 1st of Jan 2010.

I don't know if this is caused by zipping them or setting them up in the ftp, but the correct date isn't showing up.
The same issue can be observed for all builds.

While this does not seem to be a serious issue, I will set S3 severity.

Comment 2

[Nicolas B. Pierron [:nbp]]

Julien, could this be a feature of our building machine to make reproducible archive, or is this a very old bug that needs to be solved one day?

Comment 3

[Julien Cristau [:jcristau]]

See https://searchfox.org/mozilla-central/rev/12ea2c521cdd071a6d25b0894f31f8f23b18b76a/python/mozbuild/mozpack/mozjar.py#687

Comment 4

[Nicolas B. Pierron [:nbp]]

Thanks.
I guess this means this was a deliberate choice from Bug 592369.