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