From: Jakub Narebski <jnareb@gmail.com>
Date: Thu, 02 Oct 2008 14:02:32 GMT
Subject: Re: How to remove a commit object?
Message-ID: <m3ljx7qemk.fsf@localhost.localdomain>
In-Reply-To: <33f4f4d70810020636g77f4180cm7aa6b7de07ae5beb@mail.gmail.com>

"Klas Lindberg" <klas.lindberg@gmail.com> writes:

> This doesn't seem to work for me. I will soon be in a situation where
> I need to selectively delete commits in such a way that they become
> completely irrecoverable. I.e. it is not enough to revert a commit.
> The *original* commit must be removed. And of course, the repo history
> is too complex to allow for rebasing followed by garbage collection or
> something like that.
[...]

> Would it be feasible to write a tool that can selectively replace a
> specific commit in the commit DAG, or would that automatically
> invalidate every SHA key for every commit that follows the replaced
> original?

It would invalidate SHA1 for every commit after first rewritten.
There are two tools which you can use to rewrite large parts of
history automatically: git-filter-branch, and git-fast-export +
git-fast-import.

HTH
-- 
Jakub Narebski
Poland
ShadeHawk on #git