sequencer: warn when internal merge may be suboptimal due to renameLimit

newren · gitster · commit b520abf1c8f3 · 2017-11-14T11:37:24.000+09:00
When many files were renamed, the recursive merge strategy stopped
detecting renames and left many paths with delete/modify conflicts,
without any warning about what was going on or providing any hints about
how to tell Git to spend more cycles to detect renames.

Signed-off-by: Elijah Newren &lt;newren@gmail.com&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git 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);
 	strbuf_release(&o.obuf);
+	diff_warn_rename_limit("merge.renamelimit", o.needed_rename_limit, 0);
 	if (clean < 0)
 		return clean;
 
