Merge branch 'tb/repack-clearing-midx'

When a packfile is removed by "git repack", multi-pack-index gets
cleared; the code was taught to do so less aggressively by first
checking if the midx actually refers to a pack that no longer
exists.

* tb/repack-clearing-midx:
  midx: traverse the local MIDX first
  builtin/repack.c: invalidate MIDX only when necessary

1 files changed, 6 insertions, 2 deletions

diff --git a/midx.c b/midx.c
index e9b2e12..cc19b66 100644
--- a/midx.c
+++ b/midx.c
@@ -416,8 +416,12 @@ int prepare_multi_pack_index_one(struct repository *r, const char *object_dir, i
 	m = load_multi_pack_index(object_dir, local);
 
 	if (m) {
-		m->next = r->objects->multi_pack_index;
-		r->objects->multi_pack_index = m;
+		struct multi_pack_index *mp = r->objects->multi_pack_index;
+		if (mp) {
+			m->next = mp->next;
+			mp->next = m;
+		} else
+			r->objects->multi_pack_index = m;
 		return 1;
 	}