Now that we have an implementation that can write the new reverse index
format, enable writing a .rev file in 'git pack-objects' by consulting
the pack.writeReverseIndex configuration variable.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
---
 builtin/pack-objects.c   |  7 +++++++
 t/t5325-reverse-index.sh | 13 +++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 5b0c4489e2..d784569200 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -2955,6 +2955,13 @@ static int git_pack_config(const char *k, const char *v, void *cb)
 			    pack_idx_opts.version);
 		return 0;
 	}
+	if (!strcmp(k, "pack.writereverseindex")) {
+		if (git_config_bool(k, v))
+			pack_idx_opts.flags |= WRITE_REV;
+		else
+			pack_idx_opts.flags &= ~WRITE_REV;
+		return 0;
+	}
 	if (!strcmp(k, "uploadpack.blobpackfileuri")) {
 		struct configured_exclusion *ex = xmalloc(sizeof(*ex));
 		const char *oid_end, *pack_end;
diff --git a/t/t5325-reverse-index.sh b/t/t5325-reverse-index.sh
index 2dae213126..87040263b7 100755
--- a/t/t5325-reverse-index.sh
+++ b/t/t5325-reverse-index.sh
@@ -68,4 +68,17 @@ test_expect_success 'index-pack infers reverse index name with -o' '
 	test_path_is_file other.rev
 '
 
+test_expect_success 'pack-objects respects pack.writeReverseIndex' '
+	test_when_finished "rm -fr pack-1-*" &&
+
+	git -c pack.writeReverseIndex= pack-objects --all pack-1 &&
+	test_path_is_missing pack-1-*.rev &&
+
+	git -c pack.writeReverseIndex=false pack-objects --all pack-1 &&
+	test_path_is_missing pack-1-*.rev &&
+
+	git -c pack.writeReverseIndex=true pack-objects --all pack-1 &&
+	test_path_is_file pack-1-*.rev
+'
+
 test_done
-- 
2.30.0.138.g6d7191ea01