From: Michael J Gruber <git@drmicha.warpmail.net>
Date: Sat, 13 Jun 2009 15:45:04 GMT
Subject: Re: Repository authenticity question
Message-ID: <4A33C980.40003@drmicha.warpmail.net>
In-Reply-To: <200906131527.03450.Karlis.Repsons@gmail.com>

Kārlis Repsons venit, vidit, dixit 13.06.2009 17:26:
> Hi,
> It would be good to know what did Linus meant, when he said "and they will 
> fail" about people, who would try changing some git projects' history (that 
> is, the content, that is added already)? If I loose my repository completely, 
> can I still know, that those contributions there are the same after I pull 
> and how? What contents can be deleted, while still retaining consistency?
> 
> Regards,
> Kārlis

The sha1 ("object name") of a commit depends not only on its contents,
but on all its predecessors. So if you know one commit's sha1 to be
"original" you know for all its ancestors.

Michael