git-svn: support -C<num> passing to git-diff-tree

The repo-config key is 'svn.copysimilarity'

Signed-off-by: Eric Wong <normalperson@yhbt.net>

diff --git a/contrib/git-svn/git-svn.perl b/contrib/git-svn/git-svn.perl
index 72129de..089d597 100755 (executable)
--- a/contrib/git-svn/git-svn.perl
+++ b/contrib/git-svn/git-svn.perl
@@ -33,7 +33,8 @@ use POSIX qw/strftime/;
 my $sha1 = qr/[a-f\d]{40}/;
 my $sha1_short = qr/[a-f\d]{4,40}/;
 my ($_revision,$_stdin,$_no_ignore_ext,$_no_stop_copy,$_help,$_rmdir,$_edit,
-       $_find_copies_harder, $_l, $_version, $_upgrade, $_authors);
+       $_find_copies_harder, $_l, $_cp_similarity,
+       $_version, $_upgrade, $_authors);
 my (@_branch_from, %tree_map, %users);
 my ($_svn_co_url_revs, $_svn_pg_peg_revs);
 
@@ -55,6 +56,7 @@ my %cmd = (
                                'rmdir' => \$_rmdir,
                                'find-copies-harder' => \$_find_copies_harder,
                                'l=i' => \$_l,
+                               'copy-similarity|C=i'=> \$_cp_similarity,
                                %fc_opts,
                        } ],
        'show-ignore' => [ \&show_ignore, "Show svn:ignore listings", { } ],
@@ -580,7 +582,12 @@ sub svn_checkout_tree {
        my $pid = open my $diff_fh, '-|';
        defined $pid or croak $!;
        if ($pid == 0) {
-               my @diff_tree = qw(git-diff-tree -z -r -C);
+               my @diff_tree = qw(git-diff-tree -z -r);
+               if ($_cp_similarity) {
+                       push @diff_tree, "-C$_cp_similarity";
+               } else {
+                       push @diff_tree, '-C';
+               }
                push @diff_tree, '--find-copies-harder' if $_find_copies_harder;
                push @diff_tree, "-l$_l" if defined $_l;
                exec(@diff_tree, $from, $treeish) or croak $!;