* standarize mtime when git checkout
@ 2013-07-08 21:39 Rick Liu
2013-07-08 22:03 ` Junio C Hamano
2013-07-09 3:54 ` René Scharfe
0 siblings, 2 replies; 4+ messages in thread
From: Rick Liu @ 2013-07-08 21:39 UTC (permalink / raw)
To: git@vger.kernel.org
Hi,
Currently when doing "git checkout" (either for a branch or a tag),
if the file doesn't exist before,
the file will be created using current datetime.
This causes problem while trying to tar the git repository source files (excluding .git folder).
The tar binary can be different
even all of file contents are the same (eg. from the same GIT commit)
because the mtime for the files might be different due to different "git checkout" time.
eg:
User A checkout the commit at time A and then tarball the folder.
User B checkout the same commit as time B and then tarball the folder.
The result tarball are binary different
even though all of tarball contents are the same
except the mtime for each file.
Can we use GIT's commit time as the mtime for all of files/folders when we do "git checkout"?
Rick
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: standarize mtime when git checkout
2013-07-08 21:39 standarize mtime when git checkout Rick Liu
@ 2013-07-08 22:03 ` Junio C Hamano
2013-07-09 3:54 ` René Scharfe
1 sibling, 0 replies; 4+ messages in thread
From: Junio C Hamano @ 2013-07-08 22:03 UTC (permalink / raw)
To: Rick Liu; +Cc: git@vger.kernel.org
"Rick Liu" <rickliu@broadcom.com> writes:
> Can we use GIT's commit time as the mtime for all of files/folders when we do "git checkout"?
No. That will screw up common practice of build based on file
timestamps (e.g. make).
You may be interested in "git archive $commit" which will set the file
timestamps that of the commit object.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: standarize mtime when git checkout
2013-07-08 21:39 standarize mtime when git checkout Rick Liu
2013-07-08 22:03 ` Junio C Hamano
@ 2013-07-09 3:54 ` René Scharfe
2013-07-09 15:45 ` Rick Liu
1 sibling, 1 reply; 4+ messages in thread
From: René Scharfe @ 2013-07-09 3:54 UTC (permalink / raw)
To: Rick Liu; +Cc: git@vger.kernel.org
Am 08.07.2013 23:39, schrieb Rick Liu:
> Hi,
>
> Currently when doing "git checkout" (either for a branch or a tag),
> if the file doesn't exist before,
> the file will be created using current datetime.
>
> This causes problem while trying to tar the git repository source files (excluding .git folder).
> The tar binary can be different
> even all of file contents are the same (eg. from the same GIT commit)
> because the mtime for the files might be different due to different "git checkout" time.
>
> eg:
> User A checkout the commit at time A and then tarball the folder.
> User B checkout the same commit as time B and then tarball the folder.
> The result tarball are binary different
> even though all of tarball contents are the same
> except the mtime for each file.
>
>
> Can we use GIT's commit time as the mtime for all of files/folders when we do "git checkout"?
That would break tools like make which rely on a files mtime to build
them. They wouldn't be able to detect switching between source file
versions that are older than the latest build.
You can use "git archive" to create tar files in which all entries have
their mtime set to the commit time. Such archives only contain tracked
(committed) files, though. And different versions of git can create
slightly different archives, but such changes have been rare.
René
^ permalink raw reply [flat|nested] 4+ messages in thread
* RE: standarize mtime when git checkout
2013-07-09 3:54 ` René Scharfe
@ 2013-07-09 15:45 ` Rick Liu
0 siblings, 0 replies; 4+ messages in thread
From: Rick Liu @ 2013-07-09 15:45 UTC (permalink / raw)
To: René Scharfe; +Cc: git@vger.kernel.org
Thanks René~
I'll use "git archive" command to create the tarball.
Rick
-----Original Message-----
From: René Scharfe [mailto:rene.scharfe@lsrfire.ath.cx]
Sent: Monday, July 08, 2013 8:54 PM
To: Rick Liu
Cc: git@vger.kernel.org
Subject: Re: standarize mtime when git checkout
Am 08.07.2013 23:39, schrieb Rick Liu:
> Hi,
>
> Currently when doing "git checkout" (either for a branch or a tag),
> if the file doesn't exist before,
> the file will be created using current datetime.
>
> This causes problem while trying to tar the git repository source files (excluding .git folder).
> The tar binary can be different
> even all of file contents are the same (eg. from the same GIT commit)
> because the mtime for the files might be different due to different "git checkout" time.
>
> eg:
> User A checkout the commit at time A and then tarball the folder.
> User B checkout the same commit as time B and then tarball the folder.
> The result tarball are binary different
> even though all of tarball contents are the same
> except the mtime for each file.
>
>
> Can we use GIT's commit time as the mtime for all of files/folders when we do "git checkout"?
That would break tools like make which rely on a files mtime to build
them. They wouldn't be able to detect switching between source file
versions that are older than the latest build.
You can use "git archive" to create tar files in which all entries have
their mtime set to the commit time. Such archives only contain tracked
(committed) files, though. And different versions of git can create
slightly different archives, but such changes have been rare.
René
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-07-09 15:46 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2013-07-08 21:39 standarize mtime when git checkout Rick Liu
2013-07-08 22:03 ` Junio C Hamano
2013-07-09 3:54 ` René Scharfe
2013-07-09 15:45 ` Rick Liu
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