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[PATCH 1/4] sequencer: Warn when internal merge may be suboptimal due to renameLimit

Having renamed files silently treated as deleted/modified conflicts
instead of correctly resolving the renamed/modified case has caused lots
of pain for some users.  Eventually, some of them figured out to set
merge.renameLimit to something higher, but without feedback about what
value it should have, they were just repeatedly guessing and retrying.

Signed-off-by: Elijah Newren <newren@xxxxxxxxx>
 sequencer.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sequencer.c b/sequencer.c
index f2a10cc4f2..2b4cecb617 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -462,6 +462,7 @@ static int do_recursive_merge(struct commit *base, struct commit *next,
 	if (is_rebase_i(opts) && clean <= 0)
 		fputs(o.obuf.buf, stdout);
+	diff_warn_rename_limit("merge.renamelimit", o.needed_rename_limit, 0);
 	if (clean < 0)
 		return clean;