linux-kernel - Re: 2.6.18-mm1

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Message-ID: <20060924132213.GE11916@pasky.or.cz>
Date:	Sun, 24 Sep 2006 15:22:13 +0200
From:	Petr Baudis <pasky@....cz>
To:	Russell King <rmk+lkml@....linux.org.uk>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.18-mm1

Dear diary, on Sun, Sep 24, 2006 at 02:46:47PM CEST, I got a letter
where Russell King <rmk+lkml@....linux.org.uk> said that...
> On Sun, Sep 24, 2006 at 04:02:15AM -0700, Andrew Morton wrote:
> >  git-arm.patch
> 
> It's worth pointing out that something has gone horribly wrong in the
> devel branch of this tree, resulting in a load of files being deleted
> which shouldn't have been.
> 
> Absolutely no idea how that happened, but it's a commit buried behind
> lots of other commits and has taken some 4 days to be spotted.  At a
> guess, a perl bug where a new associative array somehow manages to pick
> up on old values and forget values from previous assignments.
> 
> Oddly, running the script in debug mode (where the only things which
> don't happen is the git commands get called) appears to give correct
> behaviour.
> 
> So I'm in the situation where I need to rebuild 4 days work in the ARM
> devel tree. ;(

If I understand correctly, you just need to get rid of that bad commit?

Can you copy the missing files (in the suitable tree structure) to
/tmp/missing/ and try this?

	cg-admin-rewritehist -r EVILCOMMIT \
		--tree-filter 'cp -r /tmp/missing/* .' \
		--commit-filter \
			'if [ "$GIT_COMMIT" = "EVILCOMMIT" ]; then
				shift;
				while [ -n "$1" ]; do
					shift; echo "$1"; shift;
				done;
			else
				git-commit-tree "$@";
			fi' \
		fixedbranch

(s/EVILCOMMIT/thesha1id/)

Now check if fixedbranch looks ok.

-- 
				Petr "Pasky" Baudis
Stuff: http://pasky.or.cz/
#!/bin/perl -sp0777i<X+d*lMLa^*lN%0]dsXx++lMlN/dsM0<j]dsj
$/=unpack('H*',$_);$_=`echo 16dio\U$k"SK$/SM$n\EsN0p[lN*1
lK[d2%Sa2/d0$^Ixp"|dc`;s/\W//g;$_=pack('H*',/((..)*)$/)
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