* date change of commit?
@ 2009-10-25 11:35 Alex K
2009-10-25 17:14 ` Matthieu Moy
0 siblings, 1 reply; 7+ messages in thread
From: Alex K @ 2009-10-25 11:35 UTC (permalink / raw
To: git
Hello,
Is it possible to change the date of a commit?
Thank you,
Alex
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: date change of commit?
2009-10-25 11:35 date change of commit? Alex K
@ 2009-10-25 17:14 ` Matthieu Moy
2009-10-27 9:41 ` Alex K
0 siblings, 1 reply; 7+ messages in thread
From: Matthieu Moy @ 2009-10-25 17:14 UTC (permalink / raw
To: Alex K; +Cc: git
Alex K <spaceoutlet@gmail.com> writes:
> Hello,
>
> Is it possible to change the date of a commit?
See git-filter-branch. This won't change the date of the existing
commit (which is impossible in Git), but will create another commit
where only the date has been changed.
--
Matthieu Moy
http://www-verimag.imag.fr/~moy/
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: date change of commit?
2009-10-25 17:14 ` Matthieu Moy
@ 2009-10-27 9:41 ` Alex K
2009-10-27 12:21 ` Miklos Vajna
0 siblings, 1 reply; 7+ messages in thread
From: Alex K @ 2009-10-27 9:41 UTC (permalink / raw
To: Matthieu Moy; +Cc: git
Thank you. And how would you use git-filter-branch to create another
branch with a different time stamp? Is it possible to commit under a
different time stamp than the one provided by your default local time?
2009/10/25 Matthieu Moy <Matthieu.Moy@grenoble-inp.fr>:
> Alex K <spaceoutlet@gmail.com> writes:
>
>> Hello,
>>
>> Is it possible to change the date of a commit?
>
> See git-filter-branch. This won't change the date of the existing
> commit (which is impossible in Git), but will create another commit
> where only the date has been changed.
>
> --
> Matthieu Moy
> http://www-verimag.imag.fr/~moy/
> --
> To unsubscribe from this list: send the line "unsubscribe git" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: date change of commit?
2009-10-27 9:41 ` Alex K
@ 2009-10-27 12:21 ` Miklos Vajna
2009-10-29 12:55 ` Alex K
0 siblings, 1 reply; 7+ messages in thread
From: Miklos Vajna @ 2009-10-27 12:21 UTC (permalink / raw
To: Alex K; +Cc: Matthieu Moy, git
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On Tue, Oct 27, 2009 at 10:41:47AM +0100, Alex K <spaceoutlet@gmail.com> wrote:
> Thank you. And how would you use git-filter-branch to create another
> branch with a different time stamp? Is it possible to commit under a
> different time stamp than the one provided by your default local time?
You can set GIT_AUTHOR_DATE and GIT_COMMITTER_DATE. Both expect a format
like: "1112911993 -0700" (unix timestamp + timezone info).
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: date change of commit?
2009-10-27 12:21 ` Miklos Vajna
@ 2009-10-29 12:55 ` Alex K
2009-10-29 14:47 ` Rogan Dawes
0 siblings, 1 reply; 7+ messages in thread
From: Alex K @ 2009-10-29 12:55 UTC (permalink / raw
To: Miklos Vajna; +Cc: Matthieu Moy, git
And how do you actually set those variables? Sorry to ask such a
trivial question but it's been an hour that i'm going through the doc
for such a simple feature. I thought those were environment variables
... but they are not seen under git var -l. Thank you.
2009/10/27 Miklos Vajna <vmiklos@frugalware.org>:
> On Tue, Oct 27, 2009 at 10:41:47AM +0100, Alex K <spaceoutlet@gmail.com> wrote:
>> Thank you. And how would you use git-filter-branch to create another
>> branch with a different time stamp? Is it possible to commit under a
>> different time stamp than the one provided by your default local time?
>
> You can set GIT_AUTHOR_DATE and GIT_COMMITTER_DATE. Both expect a format
> like: "1112911993 -0700" (unix timestamp + timezone info).
>
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: date change of commit?
2009-10-29 12:55 ` Alex K
@ 2009-10-29 14:47 ` Rogan Dawes
2009-10-29 16:43 ` Thomas Rast
0 siblings, 1 reply; 7+ messages in thread
From: Rogan Dawes @ 2009-10-29 14:47 UTC (permalink / raw
To: Alex K; +Cc: Miklos Vajna, Matthieu Moy, git
Alex K wrote:
> And how do you actually set those variables? Sorry to ask such a
> trivial question but it's been an hour that i'm going through the doc
> for such a simple feature. I thought those were environment variables
> ... but they are not seen under git var -l. Thank you.
>
As you suspected, they are environment variables.
i.e. :
$ GIT_AUTHOR_DATE="1112911993 -0700" git commit x
Hope that helps.
Rogan
> 2009/10/27 Miklos Vajna <vmiklos@frugalware.org>:
>> On Tue, Oct 27, 2009 at 10:41:47AM +0100, Alex K <spaceoutlet@gmail.com> wrote:
>>> Thank you. And how would you use git-filter-branch to create another
>>> branch with a different time stamp? Is it possible to commit under a
>>> different time stamp than the one provided by your default local time?
>> You can set GIT_AUTHOR_DATE and GIT_COMMITTER_DATE. Both expect a format
>> like: "1112911993 -0700" (unix timestamp + timezone info).
>>
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: date change of commit?
2009-10-29 14:47 ` Rogan Dawes
@ 2009-10-29 16:43 ` Thomas Rast
0 siblings, 0 replies; 7+ messages in thread
From: Thomas Rast @ 2009-10-29 16:43 UTC (permalink / raw
To: Rogan Dawes; +Cc: Alex K, Miklos Vajna, Matthieu Moy, git
Rogan Dawes wrote:
> Alex K wrote:
> > And how do you actually set those variables? Sorry to ask such a
> > trivial question but it's been an hour that i'm going through the doc
> > for such a simple feature. I thought those were environment variables
>
> As you suspected, they are environment variables.
>
> i.e. :
>
> $ GIT_AUTHOR_DATE="1112911993 -0700" git commit x
Since this was in the context of git-filter-branch, I should point out
that you'll have to use the variables with --env-filter and (like the
manpage says) make sure you export them.
So to change the date of a single commit with SHA1 <sha1>, you could
say
git filter-branch --env-filter '
if [ $GIT_COMMIT = <sha1> ]; then
export GIT_AUTHOR_DATE="1112911993 -0700"
export GIT_COMMITTER_DATE="1112911993 -0700"
fi
' <other_arguments>
Alex K wrote:
> for such a simple feature
I'm not sure if you're referring to setting the variables or actually
rewriting the commits here, but anyway:
The reason why the latter is so hard is that rewriting "old" history
is a _huge_ hassle for people who already have the previous version of
that history.
That being said, _why_? The dates are never a guarantee that
something happened earlier or later precisely because they can easily
be modified at commit time. So nobody should take them as more than a
hint, and there's little use in faking hints.
--
Thomas Rast
trast@{inf,student}.ethz.ch
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2009-10-29 16:45 UTC | newest]
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2009-10-25 11:35 date change of commit? Alex K
2009-10-25 17:14 ` Matthieu Moy
2009-10-27 9:41 ` Alex K
2009-10-27 12:21 ` Miklos Vajna
2009-10-29 12:55 ` Alex K
2009-10-29 14:47 ` Rogan Dawes
2009-10-29 16:43 ` Thomas Rast
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