Subject: [RFC PATCH 1/2] t5412: test receive-pack connectivity check

From: Justin Tobler <[email-masked]>
Date: Tue, 6 May 2025 22:02:48 -0500

As part of git-recieve-pack(1), the connectivity of objects is checked.
Add a test validating that git-receive-pack(1) fails due to an incoming
packfile that would leave the repository with missing objects.

Signed-off-by: Justin Tobler <[email-masked]>
---
 t/meson.build           |  1 +
 t/t5412-receive-pack.sh | 27 +++++++++++++++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100755 t/t5412-receive-pack.sh

diff --git a/t/meson.build b/t/meson.build
index 43c9750b88..81066668b9 100644
--- a/t/meson.build
+++ b/t/meson.build
@@ -630,6 +630,7 @@ integration_tests = [
   't5409-colorize-remote-messages.sh',
   't5410-receive-pack-alternates.sh',
   't5411-proc-receive-hook.sh',
+  't5412-receive-pack.sh',
   't5500-fetch-pack.sh',
   't5501-fetch-push-alternates.sh',
   't5502-quickfetch.sh',
diff --git a/t/t5412-receive-pack.sh b/t/t5412-receive-pack.sh
new file mode 100755
index 0000000000..190c7d3624
--- /dev/null
+++ b/t/t5412-receive-pack.sh
@@ -0,0 +1,27 @@
+#!/bin/sh
+
+test_description='git receive-pack connectivity checks'
+
+. ./test-lib.sh
+
+test_expect_success 'receive-pack missing objects fails connectivity check' '
+	test_when_finished rm -rf repo remote.git setup.git &&
+
+	git init repo &&
+	git -C repo commit --allow-empty -m 1 &&
+	git clone --bare repo setup.git &&
+	git -C repo commit --allow-empty -m 2 &&
+
+	# Capture git-send-pack(1) output sent to git-receive-pack(1).
+	git -C repo send-pack ../setup.git --all \
+		--receive-pack="tee ${SQ}$(pwd)/out${SQ} | git-receive-pack" &&
+
+	# Replay captured git-send-pack(1) output on new empty repository.
+	git init --bare remote.git &&
+	git receive-pack remote.git <out >actual &&
+
+	test_grep "fatal: Failed to traverse parents" actual &&
+	test_must_fail git -C remote.git cat-file -e $(git -C repo rev-parse HEAD)
+'
+
+test_done
-- 
2.49.0.111.g5b97a56fa0