diff.c: reduce implicit dependency on the_index

diff and textconv code has so widespread use that it's hard to simply
update their api and all call sites at once because it would result in
a big patch. For now reduce the_index references to two places:
diff_setup() and fill_textconv().

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/diff.h b/diff.h
index 89544e6..0b67932 100644
--- a/diff.h
+++ b/diff.h
@@ -18,6 +18,7 @@ struct userdiff_driver;
 struct oid_array;
 struct commit;
 struct combine_diff_path;
+struct repository;
 
 typedef int (*pathchange_fn_t)(struct diff_options *options,
 		 struct combine_diff_path *path);
@@ -220,6 +221,8 @@ struct diff_options {
 	/* XDF_WHITESPACE_FLAGS regarding block detection are set at 2, 3, 4 */
 	#define COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE (1<<5)
 	int color_moved_ws_handling;
+
+	struct repository *repo;
 };
 
 void diff_emit_submodule_del(struct diff_options *o, const char *line);