From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Elijah Newren" <newren@gmail.com>
Subject: Re: Trying to use git-filter-branch to compress history by removing large, obsolete binary files
Date: Sun, 7 Oct 2007 18:22:28 -0600
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Cc: "Alex Riesen" <raa.lkml@gmail.com>,
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On 10/7/07, Dmitry Potapov <dpotapov@gmail.com> wrote:
> On Sun, Oct 07, 2007 at 04:24:49PM -0600, Elijah Newren wrote:
> > $ git reflog expire --all
> > $ git gc --aggressive --prune
>
> I believe this should work:
>
> git reflog expire --all --expire-unreachable=0
> git gc --prune

Yes, this seems to work.  So the history-rewriting steps are

git-filter-branch --tree-filter 'rm -f testme.txt' HEAD
git reset --hard
rm -rf .git/refs/original/
vi .git/packed-refs
# Use vi to remove the line referring to refs/original...
git reflog expire --all --expire-unreachable=0
git gc --prune

Seems like a wrapper is needed.  :-)

> Warning: all unreachable references will be removed!

What other scenarios could lead to unreachable references?  I don't
know how to determine whether this is safe or not (except that these
were test repositories anyway, so I don't care what happens to them).

Thanks!
Elijah