[Git] partial downloading feature

[Tetsuo Handa]

Hello.

Is there any chance to add support for "[path...]" argument of git-archive
command to gitweb.cgi interface (something like below untested patch) ?

I sometimes download kernel source from snapshot links on
http://git.kernel.org/?p=linux/kernel/git/next/linux-next-history.git;a=summary
but I don't need 100MB tarball when wanting to download a single subdirectory.

diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 85d64b2..aedf11e 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -754,6 +754,7 @@ our @cgi_param_mapping = (
 	searchtext => "s",
 	searchtype => "st",
 	snapshot_format => "sf",
+	snapshot_subdir => "ss",
 	extra_options => "opt",
 	search_use_regexp => "sr",
 	ctag => "by_tag",
@@ -6681,7 +6682,7 @@ sub git_snapshot {
 	my $cmd = quote_command(
 		git_cmd(), 'archive',
 		"--format=$known_snapshot_formats{$format}{'format'}",
-		"--prefix=$prefix/", $hash);
+		"--prefix=$prefix/", $hash, $snapshot_subdir);
 	if (exists $known_snapshot_formats{$format}{'compressor'}) {
 		$cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
 	}
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