All of lore.kernel.org
 help / color / mirror / Atom feed
From: Jakub Narebski <jnareb@gmail.com>
To: martin f krafft <madduck@madduck.net>
Cc: git discussion list <git@vger.kernel.org>
Subject: Re: Git commit hash clash prevention
Date: Thu, 02 Oct 2008 07:00:18 -0700 (PDT)	[thread overview]
Message-ID: <m3prmjqeq8.fsf@localhost.localdomain> (raw)
In-Reply-To: <20081002085358.GA5342@lapse.rw.madduck.net>

martin f krafft <madduck@madduck.net> writes:

> the other day during a workshop on Git, one of the attendants asked
> about the scenario when two developers, Jane and David, both working
> on the same project, both create a commit and the two just so happen
> to have the same SHA-1. I realise that the likelihood of this
> happening is about as high as the chance of <insert witty joke
> here>, but it *is* possible, isn't it? Even though this is thus
> somewhat academic, I am still very curious about it.
> 
> What happens when David now pulls from Jane? How does Git deal with
> this?

Cannot happen in practice.

But just in case git trusts object it already has in repository over
object which just got fetched (or pushed).

-- 
Jakub Narebski
Poland
ShadeHawk on #git

  parent reply	other threads:[~2008-10-02 14:01 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-02  8:53 Git commit hash clash prevention martin f krafft
2008-10-02  9:18 ` Thomas Rast
2008-10-02 11:08   ` Jean-Luc Herren
2008-10-02 10:07 ` Johannes Schindelin
2008-10-02 14:00 ` Jakub Narebski [this message]
2008-10-02 15:39   ` Johannes Schindelin
2008-10-02 16:04 ` Stephan Beyer

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=m3prmjqeq8.fsf@localhost.localdomain \
    --to=jnareb@gmail.com \
    --cc=git@vger.kernel.org \
    --cc=madduck@madduck.net \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.