From: Tim Henigan <tim.henigan@gmail.com>
Date: Tue, 10 Apr 2012 17:24:52 GMT
Subject: Re: [PATCH 8/9 v11] difftool: teach difftool to handle directory diffs
Message-ID: <CAFouetijF5vt9r1GfbntJ0BEqoo0FpztkeqrmeN=-6DK1Q_XRA@mail.gmail.com>
In-Reply-To: <CAJDDKr76eMiA4rOHQhar3aToVThDfbc8Ki5tr2PGU_UpDMAVeA@mail.gmail.com>

On Mon, Apr 9, 2012 at 8:14 AM, David Aguilar <davvid@gmail.com> wrote:
> On Wed, Apr 4, 2012 at 12:21 PM, Tim Henigan <tim.henigan@gmail.com> wrote:
>> diff --git a/git-difftool.perl b/git-difftool.perl
>> index d4fe998..5bb01e1 100755
>> --- a/git-difftool.perl
>> +++ b/git-difftool.perl
>> @@ -1,21 +1,29 @@

...snip...

>> +       $ENV{GIT_DIR} = $repo->repo_path();
>> +       $ENV{GIT_INDEX_FILE} = "$tmpdir/lindex";
>> +       ($inpipe, $ctx) = $repo->command_input_pipe(qw/update-index -z --index-info/);
>> +       print($inpipe $lindex);
>> +       $repo->command_close_pipe($inpipe, $ctx);
>> +       system(('git', 'checkout-index', '--all', "--prefix=$ldir/"));

...snip...

>> +       # If the diff including working copy files and those
>> +       # files were modified during the diff, then the changes
>> +       # should be copied back to the working tree
>> +       my $repo = Git->repository();
>> +       my $workdir = $repo->repo_path() . "/..";
>
> Does this work when $GIT_WORK_TREE / core.worktree are defined?

Should I also be concerned that the existing code always overrides $GIT_DIR?

For example, should I squash in the following before calling 'git update-index'?

-       $ENV{GIT_DIR} = $repo->repo_path();
+      if (not defined($ENV{GIT_DIR})) {
+              $ENV{GIT_DIR} = $repo->repo_path();
+      }

This seems like the right thing to do, but again I have not used
$GIT_DIR except for the implementation of this script.