builtin: add a repository parameter for builtin functions

In order to reduce the usage of the global the_repository, add a
parameter to builtin functions that will get passed a repository
variable.

This commit uses UNUSED on most of the builtin functions, as subsequent
commits will modify the actual builtins to pass the repository parameter
down.

Signed-off-by: John Cai <johncai86@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/builtin/diff-tree.c b/builtin/diff-tree.c
index b8df1d4b79..841448b023 100644
--- a/builtin/diff-tree.c
+++ b/builtin/diff-tree.c
@@ -108,7 +108,10 @@ static void diff_tree_tweak_rev(struct rev_info *rev)
 	}
 }
 
-int cmd_diff_tree(int argc, const char **argv, const char *prefix)
+int cmd_diff_tree(int argc,
+		  const char **argv,
+		  const char *prefix,
+		  struct repository *repo UNUSED)
 {
 	char line[1000];
 	struct object *tree1, *tree2;