From: Tim Henigan <tim.henigan@gmail.com>
Date: Tue, 20 Mar 2012 20:17:51 GMT
Subject: Re: [PATCH 7/9] difftool: teach difftool to handle directory diffs
Message-ID: <CAFouethvGQD3RR_Lcu6GFA3pRS7_7nQC77g7coxOBDBP4ATP6A@mail.gmail.com>
In-Reply-To: <7vlimv5del.fsf@alter.siamese.dyndns.org>

On Tue, Mar 20, 2012 at 2:35 PM, Junio C Hamano <gitster@pobox.com> wrote:
> Tim Henigan <tim.henigan@gmail.com> writes:
>
>> However, when 'difftool --dir-diff' is run from a subdirectory of the
>> Git repository, there are problems.
>>   - The temporary index file generated by 'git update-index' appears
>> to be correct.
>>   - 'git checkout-index --all --prefix=$tmp' command does not work
>> (output tmp dir is empty).
>
> Hrmph.
>
> $ rm -fr /tmp/xyz
> $ cd Documentation
> $ git checkout-index --all --prefix=/tmp/xyz/
> $ ls -F /tmp/xyz
> Documentation/
> $ rm -fr /tmp/xyz
> $ GIT_DIR=$(pwd)/../.git GIT_WORK_TREE=$(pwd) \
>  git checkout-index --all --prefix=/tmp/xyz/
> $ ls -FC /tmp/xyz | head -2
> abspath.c                   git-merge-octopus.sh*       reflog-walk.c
> aclocal.m4                  git-merge-one-file.sh*      reflog-walk.h
>
> Be sure to have the trailing slash in $tmp.

It turns out that 'Git::command_oneline()' does not honor environment
variables set prior to calling the function.

This change fixed the problem:

- $repo->command_oneline(["checkout-index", "-a", "--prefix=$ldir/"]);
+ $ENV{GIT_DIR} = $repo->repo_path();
+ system(('git', 'checkout-index', '-a', "--prefix=$ldir/"));

I'm still testing, but will submit an updated patch soon.