From: David Aguilar <davvid@gmail.com>
Date: Fri, 13 Apr 2012 02:53:27 GMT
Subject: Re: [PATCH 8/9 v12] difftool: teach difftool to handle directory diffs
Message-ID: <CAJDDKr4UbN3izmqa89CCH7OY4c9LOH0S2EbdUCxHK3G6GHd4xQ@mail.gmail.com>
In-Reply-To: <7v62d4692l.fsf@alter.siamese.dyndns.org>

On Thu, Apr 12, 2012 at 12:31 PM, Junio C Hamano <gitster@pobox.com> wrote:
> Tim Henigan <tim.henigan@gmail.com> writes:
>
>> Would the following change be better?
>>
>> -     my $cmd = "git diff --raw --no-abbrev -z " . join(" ", @ARGV);
>> +     my $cmd = "git diff --raw --no-abbrev -z @ARGV";
>
> They look exactly the same to me.

The issue is that this does not properly handle shell characters, IFS, etc.

I think a simple solution would be to use git diff --exit-code --quiet here.

e.g.

    my $rc = system('git', 'diff', '--exit-code', '--quiet', @ARGV);

That avoids the shell and properly handles shell meta-characters, IFS, etc.
-- 
David