1 files changed, 118 insertions, 0 deletions
diff --git a/t/t5004-archive-corner-cases.sh b/t/t5004-archive-corner-cases.sh
new file mode 100755
index 0000000..654adda
--- /dev/null
+++ b/t/t5004-archive-corner-cases.sh
@@ -0,0 +1,118 @@
+#!/bin/sh
+
+test_description='test corner cases of git-archive'
+. ./test-lib.sh
+
+test_expect_success 'create commit with empty tree' '
+	git commit --allow-empty -m foo
+'
+
+# Make a dir and clean it up afterwards
+make_dir() {
+	mkdir "$1" &&
+	test_when_finished "rm -rf '$1'"
+}
+
+# Check that the dir given in "$1" contains exactly the
+# set of paths given as arguments.
+check_dir() {
+	dir=$1; shift
+	{
+		echo "$dir" &&
+		for i in "$@"; do
+			echo "$dir/$i"
+		done
+	} | sort >expect &&
+	find "$dir" ! -name pax_global_header -print | sort >actual &&
+	test_cmp expect actual
+}
+
+
+# bsdtar/libarchive versions before 3.1.3 consider a tar file with a
+# global pax header that is not followed by a file record as corrupt.
+if "$TAR" tf "$TEST_DIRECTORY"/t5004/empty-with-pax-header.tar >/dev/null 2>&1
+then
+	test_set_prereq HEADER_ONLY_TAR_OK
+fi
+
+test_expect_success HEADER_ONLY_TAR_OK 'tar archive of commit with empty tree' '
+	git archive --format=tar HEAD >empty-with-pax-header.tar &&
+	make_dir extract &&
+	"$TAR" xf empty-with-pax-header.tar -C extract &&
+	check_dir extract
+'
+
+test_expect_success 'tar archive of empty tree is empty' '
+	git archive --format=tar HEAD: >empty.tar &&
+	perl -e "print \"\\0\" x 10240" >10knuls.tar &&
+	test_cmp_bin 10knuls.tar empty.tar
+'
+
+test_expect_success 'tar archive of empty tree with prefix' '
+	git archive --format=tar --prefix=foo/ HEAD >prefix.tar &&
+	make_dir extract &&
+	"$TAR" xf prefix.tar -C extract &&
+	check_dir extract foo
+'
+
+test_expect_success UNZIP 'zip archive of empty tree is empty' '
+	# Detect the exit code produced when our particular flavor of unzip
+	# sees an empty archive. Infozip will generate a warning and exit with
+	# code 1. But in the name of sanity, we do not expect other unzip
+	# implementations to do the same thing (it would be perfectly
+	# reasonable to exit 0, for example).
+	#
+	# This makes our test less rigorous on some platforms (unzip may not
+	# handle the empty repo at all, making our later check of its exit code
+	# a no-op). But we cannot do anything reasonable except skip the test
+	# on such platforms anyway, and this is the moral equivalent.
+	{
+		"$GIT_UNZIP" "$TEST_DIRECTORY"/t5004/empty.zip
+		expect_code=$?
+	} &&
+
+	git archive --format=zip HEAD >empty.zip &&
+	make_dir extract &&
+	(
+		cd extract &&
+		test_expect_code $expect_code "$GIT_UNZIP" ../empty.zip
+	) &&
+	check_dir extract
+'
+
+test_expect_success UNZIP 'zip archive of empty tree with prefix' '
+	# We do not have to play exit-code tricks here, because our
+	# result should not be empty; it has a directory in it.
+	git archive --format=zip --prefix=foo/ HEAD >prefix.zip &&
+	make_dir extract &&
+	(
+		cd extract &&
+		"$GIT_UNZIP" ../prefix.zip
+	) &&
+	check_dir extract foo
+'
+
+test_expect_success 'archive complains about pathspec on empty tree' '
+	test_must_fail git archive --format=tar HEAD -- foo >/dev/null
+'
+
+test_expect_success 'create a commit with an empty subtree' '
+	empty_tree=$(git hash-object -t tree /dev/null) &&
+	root_tree=$(printf "040000 tree $empty_tree\tsub\n" | git mktree)
+'
+
+test_expect_success 'archive empty subtree with no pathspec' '
+	git archive --format=tar $root_tree >subtree-all.tar &&
+	make_dir extract &&
+	"$TAR" xf subtree-all.tar -C extract &&
+	check_dir extract sub
+'
+
+test_expect_success 'archive empty subtree by direct pathspec' '
+	git archive --format=tar $root_tree -- sub >subtree-path.tar &&
+	make_dir extract &&
+	"$TAR" xf subtree-path.tar -C extract &&
+	check_dir extract sub
+'
+
+test_done