From 861dc19ba852cf668b40d0ef601b44c7c03853a1 Mon Sep 17 00:00:00 2001
From: Junio C Hamano <gitster@pobox.com>
Date: Thu, 2 May 2024 13:15:57 -0700
Subject: [PATCH] t/lib-chunk: work around broken "mv" on some vintage of macOS
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When the destination is read-only, "mv" on some version of macOS
asks whether to replace the destination even though in the test its
stdin is not a terminal (and thus doesn't conform to POSIX[1]).

The helper to corrupt a chunk-file is designed to work on the
files like commit-graph and multi-pack-index files that are
generally read-only, so use "mv -f" to work around this issue.

Helped-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 t/lib-chunk.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/t/lib-chunk.sh b/t/lib-chunk.sh
index a7cd9c3c6d..9f01df190b 100644
--- a/t/lib-chunk.sh
+++ b/t/lib-chunk.sh
@@ -13,5 +13,6 @@ corrupt_chunk_file () {
 	fn=$1; shift
 	perl "$TEST_DIRECTORY"/lib-chunk/corrupt-chunk-file.pl \
 		"$@" <"$fn" >"$fn.tmp" &&
-	mv "$fn.tmp" "$fn"
+	# some vintages of macOS 'mv' fails to overwrite a read-only file.
+	mv -f "$fn.tmp" "$fn"
 }