From: Don Zickus <dzickus@gmail.com>
Date: Fri, 16 Dec 2005 21:35:41 GMT
Subject: Re: git merge questions
Message-ID: <68948ca0512161335k50a3ec64lee6f73ea4f8ae23f@mail.gmail.com>
In-Reply-To: <7vy82keo8p.fsf@assigned-by-dhcp.cox.net>

> and then, the digging I suggested yields these:
>
> $ ls -l arch/{ppc64,powerpc}/Kconfig
> -rw-rw-r--  1 junio src 24279 Dec 16 12:55 arch/powerpc/Kconfig
> -rw-rw-r--  1 junio src 11027 Dec 16 12:58 arch/ppc64/Kconfig
> $ git ls-files -s arch/ppc64/Kconfig arch/powerpc/Kconfig
> 100644 bb2efdd566a9d590d64184b10b097e4b7ed17e95 0       arch/powerpc/Kconfig
> 100644 c658650af429672267409508b02b38754c11a40f 1       arch/ppc64/Kconfig
> 100644 8abf1118ebbd59954d098d87679114ffda0e75cb 3       arch/ppc64/Kconfig
> $ ls arch/{powerpc,ppc64}/Kconfig~*
> ls: arch/powerpc/Kconfig~*: No such file or directory
> ls: arch/ppc64/Kconfig~*: No such file or directory
> $ git diff --theirs arch/ppc64/Kconfig
> * Unmerged path arch/ppc64/Kconfig
> diff --git a/arch/ppc64/Kconfig b/arch/ppc64/Kconfig
>
> The merge algorithm thought your branch (that is, test2 which is
> v2.6.15-rc4) removed the old ppc64/Kconfig path, but the other
> branch (test1 which has diff between v2.6.14 and v2.6.14.4) made
> updates to that file.  For the other path, it simply thought
> your branch added a new file arch/powerpc/Kconfig while the
> other branch did not do anything to that path between v2.6.14
> and v2.6.14.4, so it merged it already.
>
> The result you want in this case is to merge changes between
> c65865 (stage1 of old path) and 8abf11 (stage3 of old path) into
> bb2efd (the latest contents of the new path) and register it as
> the result of merge for arch/powerpc/Kconfig, and remove
> arch/ppc64/Kconfig.  So the sequence would be:
>
> $ orig=$(git unpack-file c65865)
> $ from_test=$(git unpack-file 8abf11)
> $ merge $from_test $orig arch/powerpc/Kconfig
> merge: warning: conflicts during merge
>
> After resolving the conflict in $from_test file, and other conflicts:
>
> $ ed $from_test
> $ cat $from_tset >arch/ppc64/Kconfig
> $ rm arch/powerpc/Kconfig
> $ rm $orig $from_test
> $ git update-index --add --remove arch/ppc64/Kconfig arch/powerpc/Kconfig
> # also mark paths you hand-resolved such as Makefile, drivers/pcmcia/i82365.c
> # etc. with "git update-index" here.
> $ git commit
>
> would commit the result of the merge.
>

Wow. That makes sense then.  All your digging techniques seem to be
fairly straightforward.   Now say I didn't know the name of the rename
and I had to dig that up.  Would the following be the right way or is
there something easier?

%git log <renamed file>  #grab the last commit id from here
%git-diff-tree -p <last commit id>  # search for the new file

Thanks again,
Don