RE: Finer timestamps and serialization in git

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From: "Jason Pyeron" <jpyeron@pdinc.us>
To: <git@vger.kernel.org>
Cc: "'Derrick Stolee'" <stolee@gmail.com>,
	"'Eric S. Raymond'" <esr@thyrsus.com>
Subject: RE: Finer timestamps and serialization in git
Date: Wed, 15 May 2019 16:28:45 -0400	[thread overview]
Message-ID: <023b01d50b5c$cbd3cd90$637b68b0$@pdinc.us> (raw)
In-Reply-To: <ae62476c-1642-0b9c-86a5-c2c8cddf9dfb@gmail.com>

(please don’t cc me)

> -----Original Message-----
> From: Derrick Stolee
> Sent: Wednesday, May 15, 2019 4:16 PM
> 
> On 5/15/2019 3:16 PM, Eric S. Raymond wrote:

<snip/> I disagree with many of Eric's reasons - and agree with most of Derrick's refutation. But

> 
> Changing the granularity of timestamps requires changing the commit format,
> which is probably a non-starter. 

is not necessarily true. If we take the below example:

committer Name <user@domain> 1557948240 -0400

and we follow the rule that:

1. any trailing zero after the decimal point MUST be omitted
2. if there are no digits after the decimal point, it MUST be omitted

This would allow:

committer Name <user@domain> 1557948240 -0400
committer Name <user@domain> 1557948240.12 -0400

but the following are never allowed:

committer Name <user@domain> 1557948240. -0400
committer Name <user@domain> 1557948240.000000 -0400

By following these rules, all previous commits' hash are unchanged. Future commits made on the top of the second will look like old commit formats. Commits coming from "older" tools will produce valid and mergeable objects. The loss precision has frustrated us several times as well.

Respectfully,

Jason Pyeron

next prev parent reply	other threads:[~2019-05-15 21:06 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-15 19:16 Finer timestamps and serialization in git Eric S. Raymond
2019-05-15 20:16 ` Derrick Stolee
2019-05-15 20:28   ` Jason Pyeron [this message]
2019-05-15 21:14     ` Derrick Stolee
2019-05-15 22:07       ` Ævar Arnfjörð Bjarmason
2019-05-16  0:28       ` Eric S. Raymond
2019-05-16  1:25         ` Derrick Stolee
2019-05-20 15:05           ` Michal Suchánek
2019-05-20 16:36             ` Eric S. Raymond
2019-05-20 17:22               ` Derrick Stolee
2019-05-20 21:32                 ` Eric S. Raymond
2019-05-15 23:40     ` Eric S. Raymond
2019-05-19  0:16       ` Philip Oakley
2019-05-19  4:09         ` Eric S. Raymond
2019-05-19 10:07           ` Philip Oakley
2019-05-15 23:32   ` Eric S. Raymond
2019-05-16  1:14     ` Derrick Stolee
2019-05-16  9:50     ` Ævar Arnfjörð Bjarmason
2019-05-19 23:15       ` Jakub Narebski
2019-05-20  0:45         ` Eric S. Raymond
2019-05-20  9:43           ` Jakub Narebski
2019-05-20 10:08             ` Ævar Arnfjörð Bjarmason
2019-05-20 12:40             ` Jeff King
2019-05-20 14:14             ` Eric S. Raymond
2019-05-20 14:41               ` Michal Suchánek
2019-05-20 22:18                 ` Philip Oakley
2019-05-20 21:38               ` Elijah Newren
2019-05-20 23:12                 ` Eric S. Raymond
2019-05-21  0:08               ` Jakub Narebski
2019-05-21  1:05                 ` Eric S. Raymond
2019-05-15 20:20 ` Ævar Arnfjörð Bjarmason
2019-05-16  0:35   ` Eric S. Raymond
2019-05-16  4:14   ` Jeff King

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