From 52ba3cc5eac0418218a90c0cddb06688d4c7b5d3 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Fri, 6 Sep 2024 16:28:09 +0200
Subject: [PATCH] Test that deserializing regular files / symlinks is exclusive

---
 tests/functional/nars.sh | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/tests/functional/nars.sh b/tests/functional/nars.sh
index 4f2470ea7..ed19637a1 100755
--- a/tests/functional/nars.sh
+++ b/tests/functional/nars.sh
@@ -24,6 +24,44 @@ expectStderr 1 nix-store --restore "$TEST_ROOT/out" < duplicate.nar | grepQuiet
 mkdir -p "$TEST_ROOT/out2"
 expectStderr 1 nix-store --restore "$TEST_ROOT/out" < duplicate.nar | grepQuiet "path '.*/out' already exists"
 
+# The same, but for a regular file.
+nix-store --dump ./nars.sh > "$TEST_ROOT/tmp.nar"
+
+rm -rf "$TEST_ROOT/out"
+nix-store --restore "$TEST_ROOT/out" < "$TEST_ROOT/tmp.nar"
+expectStderr 1 nix-store --restore "$TEST_ROOT/out" < "$TEST_ROOT/tmp.nar" | grepQuiet "File exists"
+
+rm -rf "$TEST_ROOT/out"
+mkdir -p "$TEST_ROOT/out"
+expectStderr 1 nix-store --restore "$TEST_ROOT/out" < "$TEST_ROOT/tmp.nar" | grepQuiet "File exists"
+
+rm -rf "$TEST_ROOT/out"
+ln -s "$TEST_ROOT/out2" "$TEST_ROOT/out"
+expectStderr 1 nix-store --restore "$TEST_ROOT/out" < "$TEST_ROOT/tmp.nar" | grepQuiet "File exists"
+
+mkdir -p "$TEST_ROOT/out2"
+expectStderr 1 nix-store --restore "$TEST_ROOT/out" < "$TEST_ROOT/tmp.nar" | grepQuiet "File exists"
+
+# The same, but for a symlink
+ln -sfn foo "$TEST_ROOT/symlink"
+nix-store --dump "$TEST_ROOT/symlink" > "$TEST_ROOT/tmp.nar"
+
+rm -rf "$TEST_ROOT/out"
+nix-store --restore "$TEST_ROOT/out" < "$TEST_ROOT/tmp.nar"
+[[ -L "$TEST_ROOT/out" ]]
+expectStderr 1 nix-store --restore "$TEST_ROOT/out" < "$TEST_ROOT/tmp.nar" | grepQuiet "File exists"
+
+rm -rf "$TEST_ROOT/out"
+mkdir -p "$TEST_ROOT/out"
+expectStderr 1 nix-store --restore "$TEST_ROOT/out" < "$TEST_ROOT/tmp.nar" | grepQuiet "File exists"
+
+rm -rf "$TEST_ROOT/out"
+ln -s "$TEST_ROOT/out2" "$TEST_ROOT/out"
+expectStderr 1 nix-store --restore "$TEST_ROOT/out" < "$TEST_ROOT/tmp.nar" | grepQuiet "File exists"
+
+mkdir -p "$TEST_ROOT/out2"
+expectStderr 1 nix-store --restore "$TEST_ROOT/out" < "$TEST_ROOT/tmp.nar" | grepQuiet "File exists"
+
 # Check whether restoring and dumping a NAR that contains case
 # collisions is round-tripping, even on a case-insensitive system.
 rm -rf "$TEST_ROOT/case"