commit: don't rewrite shared index unnecessarily
Remove a cache invalidation which would cause the shared index to be
rewritten on as-is commits.
When the cache-tree has changed, we need to update it. But we don't
necessarily need to update the shared index. So setting
active_cache_changed to SOMETHING_CHANGED is unnecessary. Instead, we
let update_main_cache_tree just update the CACHE_TREE_CHANGED bit.
In order to test this, make test-dump-split-index not segfault on
missing replace_bitmap/delete_bitmap. This new codepath is not called
now that the test passes, but is necessary to avoid a segfault when the
new test is run with the old builtin/commit.c code.
Signed-off-by: David Turner <dturner@twopensource.com>
Acked-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/commit.c b/builtin/commit.c
index 254477f..1692620 100644
--- a/builtin/commit.c
+++ b/builtin/commit.c
@@ -404,10 +404,8 @@
hold_locked_index(&index_lock, 1);
refresh_cache_or_die(refresh_flags);
if (active_cache_changed
- || !cache_tree_fully_valid(active_cache_tree)) {
+ || !cache_tree_fully_valid(active_cache_tree))
update_main_cache_tree(WRITE_TREE_SILENT);
- active_cache_changed = 1;
- }
if (active_cache_changed) {
if (write_locked_index(&the_index, &index_lock,
COMMIT_LOCK))
