linux-kernel - Re: [PATCH] checkpatch.pl: Relax commit ID check to allow more than 12 chars

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Message-ID: <CAMuHMdWcjUXwkk2V29p-hifDnMhLRSwQBXMzVeURRA48znKC5Q@mail.gmail.com>
Date:   Mon, 6 Feb 2023 09:38:59 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Joe Perches <joe@...ches.com>
Cc:     Jonathan Neuschäfer <j.neuschaefer@....net>,
        linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Andy Whitcroft <apw@...onical.com>,
        Dwaipayan Ray <dwaipayanray1@...il.com>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>
Subject: Re: [PATCH] checkpatch.pl: Relax commit ID check to allow more than
 12 chars

Hi Joe,

On Sat, Feb 4, 2023 at 5:59 PM Joe Perches <joe@...ches.com> wrote:
> On Sun, 2023-01-29 at 09:52 -0800, Joe Perches wrote:
> > On Sun, 2023-01-29 at 13:34 +0100, Jonathan Neuschäfer wrote:
> > > By now, `git log --pretty=%h` (on my copy of linux.git) prints commit
> > > hashes with 13 digits, because of the number of objects.
> > >
> > > Relax the rule in checkpatch.pl to allow a few more digits (up to 16).
> >
> > NAK without updating the process docs first.
>
> btw: it looks like 12 will still be sufficient for awhile yet
>
> $ git count
> total 1154908

Hmm, Ubuntu git too old?

> $ git -c core.abbrev=5 log --pretty=format:%h | \
>   perl -nE 'chomp;say length' | sort | uniq -c | sort -n -k2
>     198 5
>  664613 6
>  450955 7
>   36667 8
>    2312 9
>     155 10
>       8 11

I'm already at twelve:

 433752 6
 640819 7
  62759 8
   3998 9
    261 10
     12 11
      1 12

I've been using core.abbrev=16 for a while, and some maintainers
reject my patches with Fixes: tags because of that...

Is it really worthwhile to save on the number of hexits, making lookup
of some commits more inconvenient?

Note that while "git show edb9b8" suggests edb9b8f[...],
gitweb says bad object id:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=edb9b8

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds