patchFix path duplication in git svn commit-diff

> Given an SVN repo file:///tmp/svntest/repo, trying to commit changes
> to a file proj/trunk/foo.txt in that repo with this command line
> 
>   git svn commit-diff -r2 HEAD^ HEAD file:///tmp/svntest/repo/proj/trunk
> 
> gave the error message
> 
>   Filesystem has no item: File not found: transaction '2-6', path
>   '/proj/trunk/proj/trunk/foo.txt'
> 
> This fixes the duplication.
> 
> Signed-off-by: Karl Hasselström <kha@treskal.com>

> ---
> 
> I really don't have a clue as to why this was broken, but the patch
> fixes the problem for me, and doesn't break the tests. I got the idea
> from dcommit, which is setting svn_path to '' unconditionally.

>  git-svn.perl |    3 +--
>  1 files changed, 1 insertions(+), 2 deletions(-)
> 
> 
> diff --git a/git-svn.perl b/git-svn.perl
> index 2c53f39..1c2a10a 100755
> --- a/git-svn.perl
> +++ b/git-svn.perl
> @@ -741,7 +741,7 @@ sub cmd_commit_diff {
>  	my $usage = "Usage: $0 commit-diff -r<revision> ".
>  	            "<tree-ish> <tree-ish> [<URL>]";
>  	fatal($usage) if (!defined $ta || !defined $tb);
> -	my $svn_path;
> +	my $svn_path = '';
>  	if (!defined $url) {
>  		my $gs = eval { Git::SVN->new };
>  		if (!$gs) {
> @@ -765,7 +765,6 @@ sub cmd_commit_diff {
>  		$_message ||= get_commit_entry($tb)->{log};
>  	}
>  	my $ra ||= Git::SVN::Ra->new($url);
> -	$svn_path ||= $ra->{svn_path};
>  	my $r = $_revision;
>  	if ($r eq 'HEAD') {
>  		$r = $ra->get_latest_revnum;
> 

> Karl Hasselström <kha@treskal.com> wrote:
>
> > I really don't have a clue as to why this was broken, but the
> > patch fixes the problem for me, and doesn't break the tests. I got
> > the idea from dcommit, which is setting svn_path to ''
> > unconditionally.
>
> Hardly anybody uses commit-diff directly :)
>
> It was a low-level plumbing command that I used to implement the
> original version of dcommit in.