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From: Shengfa Lin <shengfa@google.com>
To: jrnieder@gmail.com
Cc: git@vger.kernel.org, gitster@pobox.com, nathaniel@google.com,
	rsbecker@nexbridge.com, santiago@nyu.edu, shengfa@google.com
Subject: Re: [RFC PATCH 1/1] hideTimezone: add a user.hideTimezone config
Date: Fri,  2 Oct 2020 21:17:19 +0000	[thread overview]
Message-ID: <20201002211719.68606-1-shengfa@google.com> (raw)
In-Reply-To: <20201001024452.GA2930867@google.com>

Jonathan Nieder <jrnieder@gmail.com> writes:

> Like Junio mentioned, this affects "git commit" but not other commands
> that record the current date with the local timezone.
> 
> The fundamental tool to exercise that machinery is
> 
> 	$ git var GIT_AUTHOR_IDENT
> 	Jonathan Nieder <jrnieder@gmail.com> 1601517809 -0700
> 
> so I suppose I'd be interested in seeing that exercised in tests.

Next patch should include a test for git var.

> [...]
> 
> The unfortunate thing about these APIs is that there's no way to pass
> in a timezone from a string instead of from the environment.  This
> means that passing through the environment as above is the only
> reasonable way to do it, but that would have the unfortunate result
> of changing the output of commands like "git log --date=local" that
> are about writing dates to the terminal instead of storing them.
> 

The TZ should apply for write but not read.

> [...]
> Looking over callers, who would this affect?  There are three callers:
> 
>  fast-import.c::parse_ident:
> 	Used to handle ident string "now".  That seems in keeping with
> 	the intent here, and fast-import does respect some other
> 	configuration though only affecting storage.  Seems fine.sensible.
> 
>  ident.c::ident_default_date:
> 	Used to produce author and committer timestamps and timestamps for
> 	reflog entries.  That's the goal; good.
> 
>  send-pack.c::generate_push_cert:
> 	Used for the timestamp sent to the server in a signed push
> 	certificate.  Also good.
> 

Thanks for the analysis here. I was wondering whether the TZ should
affect these callers.

> So I think this does the right thing, plus it retains the
> user-friendly feature of being able to *display* timestamps in their
> local timezone.
> 
> Now let's talk through the downsides:
> 
> It's complex.  The performance isn't likely to be bad when
> user.timezone is not set, which is nice, but it still is messier than
> I'd like to see.
> 

+1.

  reply	other threads:[~2020-10-02 21:17 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-05 17:14 [ISSUE] Stop accessing, storing, and sharing the user's time zone Nathaniel Manista
2019-12-05 17:31 ` Junio C Hamano
2019-12-05 17:33 ` Randall S. Becker
2019-12-05 17:43   ` Junio C Hamano
2019-12-05 17:53     ` Santiago Torres Arias
2019-12-05 18:00     ` Randall S. Becker
2020-09-30 23:21 ` [RFC PATCH 0/1] adding user.hideTimezone for setting UTC timezone Shengfa Lin
2020-09-30 23:21   ` [RFC PATCH 1/1] hideTimezone: add a user.hideTimezone config Shengfa Lin
2020-09-30 23:41     ` Junio C Hamano
2020-10-01  0:17       ` Junio C Hamano
2020-10-02  6:07         ` Shengfa Lin
2020-10-01  0:31       ` Junio C Hamano
2020-10-01  0:35         ` Junio C Hamano
2020-10-02  6:41           ` Shengfa Lin
2020-10-02  6:46             ` Shengfa Lin
2020-10-02  6:37         ` Shengfa Lin
2020-10-02  6:02       ` Shengfa Lin
2020-10-02  6:15         ` Jonathan Nieder
2020-10-02 22:32           ` Shengfa Lin
2020-10-03  4:57             ` Junio C Hamano
2020-09-30 23:55     ` Junio C Hamano
2020-10-02  6:51       ` Shengfa Lin
2020-10-01  0:05     ` Junio C Hamano
2020-10-01  2:44     ` Jonathan Nieder
2020-10-02 21:17       ` Shengfa Lin [this message]
2020-09-30 23:53   ` [RFC PATCH 0/1] adding user.hideTimezone for setting UTC timezone Junio C Hamano
2020-10-01  2:17     ` Junio C Hamano
2020-10-01  3:43       ` Jonathan Nieder
2020-10-01 15:48         ` Junio C Hamano
2020-10-08 19:49           ` Junio C Hamano
     [not found]             ` <CAEOYnASgxCE5NjhoSgDwyQyAmdLhw5UyFq_Fu==8q7y6uXGz6w@mail.gmail.com>
2020-10-09 16:48               ` Junio C Hamano
2020-10-02 21:56         ` Shengfa Lin
2020-10-02 22:06           ` Junio C Hamano
2020-10-03  3:50             ` Shengfa Lin
2020-10-03  4:42               ` Junio C Hamano
2020-10-03 19:53         ` brian m. carlson
2020-10-03 22:14           ` Junio C Hamano
2020-10-02 21:42       ` Shengfa Lin
2020-10-02 21:23     ` Shengfa Lin
2020-10-13  5:28 ` [WIP v2 0/2] experiment with commit option record-time-zone Shengfa Lin
2020-10-13  5:28   ` [WIP v2 1/2] Adding a record-time-zone command option for commit Shengfa Lin
2020-10-13 20:03     ` Junio C Hamano
2020-10-21  5:01       ` Shengfa Lin
2020-10-21 18:55         ` Junio C Hamano
2020-10-22 16:27           ` Junio C Hamano
2020-10-26  4:14             ` Shengfa Lin
2020-10-13  5:28   ` [WIP v2 2/2] Demonstrate failing and passing tests Shengfa Lin

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