#!/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
'

ZIPINFO=zipinfo

test_lazy_prereq ZIPINFO '
        n=$("$ZIPINFO" "$TEST_DIRECTORY"/t5004/empty.zip | sed -n "2s/.* //p")
        test "x$n" = "x0"
'

test_expect_success ZIPINFO 'zip archive with many entries' '
        # add a directory with 256 files
        mkdir 00 &&
        for a in 0 1 2 3 4 5 6 7 8 9 a b c d e f
        do
                for b in 0 1 2 3 4 5 6 7 8 9 a b c d e f
                do
                        : >00/$a$b
                done
        done &&
        git add 00 &&
        git commit -m "256 files in 1 directory" &&

        # duplicate it to get 65536 files in 256 directories
        subtree=$(git write-tree --prefix=00/) &&
        for c in 0 1 2 3 4 5 6 7 8 9 a b c d e f
        do
                for d in 0 1 2 3 4 5 6 7 8 9 a b c d e f
                do
                        echo "040000 tree $subtree      $c$d"
                done
        done >tree &&
        tree=$(git mktree <tree) &&

        # zip them
        git archive -o many.zip $tree &&

        # check the number of entries in the ZIP file directory
        expr 65536 + 256 >expect &&
        "$ZIPINFO" many.zip | head -2 | sed -n "2s/.* //p" >actual &&
        test_cmp expect actual
'

test_done