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From: Junio C Hamano <gitster@pobox•com>
To: "René Scharfe" <l.s.r@web•de>
Cc: "Jeff King" <peff@peff•net>, "Ulrich Mueller" <ulm@gentoo•org>,
	"Ævar Arnfjörð Bjarmason" <avarab@gmail•com>,
	"Git Mailing List" <git@vger•kernel.org>
Subject: Re: [PATCH] strbuf: let strbuf_addftime handle %z and %Z itself
Date: Mon, 12 Jun 2017 08:12:31 -0700	[thread overview]
Message-ID: <xmqq37b5qly8.fsf@gitster.mtv.corp.google.com> (raw)
In-Reply-To: <662a84da-8a66-3a37-d9d2-4ff8b5f996c3@web.de> ("René Scharfe"'s message of "Sun, 11 Jun 2017 19:36:47 +0200")

René Scharfe <l.s.r@web•de> writes:

> Am 07.06.2017 um 10:17 schrieb Jeff King:
>> On Sat, Jun 03, 2017 at 12:40:34PM +0200, René Scharfe wrote:
>>> Duplicates strbuf_expand to a certain extent, but not too badly, I
>>> think.  Leaves the door open for letting strftime handle the local
>>> case.
>>
>> I guess you'd plan to do that like this in the caller:
>>
>>    if (date->local)
>> 	tz_name = NULL;
>>    else
>> 	tz_name = "";
>>
>> and then your strftime() doesn't do any %z expansion when tz_name is
>> NULL.
>
> Yes, or you could look up a time zone name somewhere else -- except we
> don't have a way to do that, at least for now.

Is that only "for now"?  I have a feeling that it is fundamentally
impossible with the data we record.  When GMTOFF 9:00 is the only
thing we have for a timestamp, can we tell if we should label it as
JST (aka Asia/Tokyo) or KST (aka Asia/Seoul)?

  reply	other threads:[~2017-06-12 15:12 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-26 18:33 git-2.13.0: log --date=format:%z not working Ulrich Mueller
2017-05-27 16:57 ` Ævar Arnfjörð Bjarmason
2017-05-27 21:46   ` Jeff King
2017-05-28 10:29     ` Ævar Arnfjörð Bjarmason
2017-05-29  0:53       ` Junio C Hamano
2017-05-28 11:43     ` René Scharfe
2017-06-02  2:23       ` Junio C Hamano
2017-06-02  3:08         ` Jeff King
2017-06-02 17:25           ` René Scharfe
2017-06-02 18:35             ` Jeff King
2017-06-02 22:04               ` Ulrich Mueller
2017-06-02 22:30                 ` Jeff King
2017-06-02 22:47                   ` Ulrich Mueller
2017-06-02 22:51                     ` Jeff King
2017-06-03 10:40                       ` [PATCH] strbuf: let strbuf_addftime handle %z and %Z itself René Scharfe
2017-06-03 13:13                         ` Ulrich Mueller
2017-06-03 16:20                           ` René Scharfe
2017-06-07  8:17                         ` Jeff King
2017-06-07  9:13                           ` [PATCH] date: use localtime() for "-local" time formats Jeff King
2017-06-11 17:36                           ` [PATCH] strbuf: let strbuf_addftime handle %z and %Z itself René Scharfe
2017-06-12 15:12                             ` Junio C Hamano [this message]
2017-06-12 16:16                               ` Ævar Arnfjörð Bjarmason
2017-06-12 16:56                                 ` Ulrich Mueller
2017-06-12 17:53                                   ` Ævar Arnfjörð Bjarmason
2017-06-12 18:15                                     ` Junio C Hamano
2017-06-12 18:20                                     ` Jeff King
2017-06-12 19:02                                       ` Ævar Arnfjörð Bjarmason
2017-06-12 21:10                                         ` Jeff King
2017-06-13  6:23                                           ` Linus Torvalds
2017-06-12 22:31                                         ` René Scharfe
2017-06-13 10:16                                           ` Ævar Arnfjörð Bjarmason
2017-06-13 10:31                                           ` Ulrich Mueller
2017-06-12 16:58                                 ` René Scharfe
2017-06-12 17:36                                   ` Jeff King
2017-06-15  8:46                         ` [PATCH v2] " René Scharfe
2017-06-15 11:27                           ` Ulrich Mueller
2017-06-15 12:28                             ` René Scharfe
2017-06-15 12:29                           ` [PATCH v3] " René Scharfe
2017-06-15 13:49                             ` Jeff King
2017-06-15 13:51                               ` [PATCH 1/2] t0006: check --date=format zone offsets Jeff King
2017-06-15 13:52                               ` [PATCH 2/2] date: use localtime() for "-local" time formats Jeff King
2017-06-15 16:12                                 ` René Scharfe
2017-06-15 21:40                                   ` Junio C Hamano
2017-06-16 12:18                                   ` Jeff King

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