[PATCH] gitweb: fix link to parent diff with pathinfo

[Richard Braun <rbraun@sceen.net>]

Gitweb, when used with PATH_INFO, shows a link to parent diff
like http://somedomain/somerepo.git/commitdiff/somehash?hp=parenthash.
That link reports "400 - Invalid hash parameter".

As I understand it, it should instead directly point to the parent diff,
i.e. turn it into http://somedomain/somerepo.git/commitdiff/parenthash,
and delete 'hash_parent' element from the %params hash once we used it,
otherwise the '?hp=parenthash' string is appended.

Signed-off-by: Richard Braun <rbraun@sceen.net>
---
 gitweb/gitweb.perl | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gitweb/gitweb.perl b/gitweb/gitweb.perl
index 05d7910..f7f7936 100755
--- a/gitweb/gitweb.perl
+++ b/gitweb/gitweb.perl
@@ -1423,7 +1423,12 @@ sub href {
 			delete $params{'hash'};
 			delete $params{'hash_base'};
 		} elsif (defined $params{'hash'}) {
-			$href .= esc_path_info($params{'hash'});
+			if (defined $params{'hash_parent'}) {
+				$href .= esc_path_info($params{'hash_parent'});
+				delete $params{'hash_parent'};
+			} else {
+				$href .= esc_path_info($params{'hash'});
+			}
 			delete $params{'hash'};
 		}
 
-- 
2.1.4