Re: 0-Based indexes for git log

From: Ben Knoble <ben.knoble@gmail.com>
Date: Sep 24, 2025, 17:28 UTC
Message-ID: <95F22D6A-38D9-4F4D-B71E-59320B86B4E8@gmail.com>
In-Reply-To: <xmqqh5wrn66m.fsf@gitster.g>

Show 23 quoted lines

> Le 24 sept. 2025 à 12:53, Junio C Hamano <gitster@pobox.com> a écrit :
> 
> Nico Williams <nico@cryptonector.com> writes:
> 
>>> On Tue, Sep 23, 2025 at 05:15:46PM -0400, 𝕍𝕖𝕝𝕠𝕔𝕚𝕗𝕪𝕖𝕣 wrote:
>>> In git log it uses a 1-based index for the date instead of a 0 based index.
>>> So it says "Fri Sep 19 14:23:24 2025 -0400" when it should say "Fri Sep 18
>>> 14:23:24 2025 -0400" (or "Friday 2025-8-18 14:23:24 (-4:00.00)"  to get a
>>> better format)
>> 
>> Day of month numbers are 1-based.
> 
> Correct.
> 
> There are a few things in Git that are 0 based, but not so many.
> 
> * parent numbers are 1-based.  HEAD~1 is the "previous commit", aka
>   "first parent".  HEAD~0 is the HEAD itself.
> 
> * merge parent numbers are 2-based (sanity of this statement is
>   already questionable).  If HEAD is a merge, HEAD~2 is the
>   "(first) side branch that was merged", HEAD~3 is the "(second)
>   side brnach that was merged (in an octopus merge), and so on.

HEAD^2, 3, etc., rather? :)