Re: git rev-parse --since=1970-01-01 does not work reliably

From: Dmitry V. Levin <ldv@altlinux.org>
Date: Nov 1, 2011, 12:44 UTC
Message-ID: <20111101124434.GB22229@altlinux.org>
In-Reply-To: <20111031231320.GA3857@do>

On Tue, Nov 01, 2011 at 06:13:20AM +0700, Nguyen Thai Ngoc Duy wrote:

Show 15 quoted lines

> On Mon, Oct 31, 2011 at 08:17:09PM +0400, Dmitry V. Levin wrote:
> > 
> > git rev-parse --since=1970-01-01 (and other git commands that take
> > date string arguments like --since) may fail when --since=1970-01-01 is
> > given.  Whether it fails or not depends on current time and timezone data.
> > For example, "TZ=Europe/Paris git rev-parse --since=1970-01-01" fails two
> > hours a day (between 00:00 and 02:00 CET), and those who use more eastern
> > timezones are even less lucky.  In artificial timezones like UTC-24 it
> > always fails:
> > 
> > $ TZ=UTC-24 git rev-parse --since=1970-01-01
> > --max-age=18446744073709523490
> 
> Out of curiosity, why do you need to work with a time so close to that
> date?

There is an utility that used to invoke "git log --since='1970-01-01 UTC'" by default, and I was unlucky enough to use it during these hours of failure. The utility is now fixed (it no longer calls git log with --since option unless explicitly instructed to do so), and I hope git is going to be fixed as well.

BTW, the timezone specifier (UTC) in "git rev-parse --since='1970-01-01 UTC'" seems to be completely ignored by date string parser.

-- 
ldv