fetch: add test to make sure we stay backwards compatible

The current implementation of submodules supports on-demand fetch if
there is no .gitmodules entry for a submodule. Let's add a test to
document this behavior.

Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/t/t5526-fetch-submodules.sh b/t/t5526-fetch-submodules.sh
index 42251f7f3af0865a31fd38722fbf7433d81fe3f0..43a22f680f95393184363e42ba052165faca466b 100755 (executable)
--- a/t/t5526-fetch-submodules.sh
+++ b/t/t5526-fetch-submodules.sh
@@ -478,7 +478,47 @@ test_expect_success "don't fetch submodule when newly recorded commits are alrea
                git fetch >../actual.out 2>../actual.err
        ) &&
        ! test -s actual.out &&
-       test_i18ncmp expect.err actual.err
+       test_i18ncmp expect.err actual.err &&
+       (
+               cd submodule &&
+               git checkout -q master
+       )
+'
+
+test_expect_success "'fetch.recurseSubmodules=on-demand' works also without .gitmodule entry" '
+       (
+               cd downstream &&
+               git fetch --recurse-submodules
+       ) &&
+       add_upstream_commit &&
+       head1=$(git rev-parse --short HEAD) &&
+       git add submodule &&
+       git rm .gitmodules &&
+       git commit -m "new submodule without .gitmodules" &&
+       printf "" >expect.out &&
+       head2=$(git rev-parse --short HEAD) &&
+       echo "From $pwd/." >expect.err.2 &&
+       echo "   $head1..$head2  master     -> origin/master" >>expect.err.2 &&
+       head -3 expect.err >>expect.err.2 &&
+       (
+               cd downstream &&
+               rm .gitmodules &&
+               git config fetch.recurseSubmodules on-demand &&
+               # fake submodule configuration to avoid skipping submodule handling
+               git config -f .gitmodules submodule.fake.path fake &&
+               git config -f .gitmodules submodule.fake.url fakeurl &&
+               git add .gitmodules &&
+               git config --unset submodule.submodule.url &&
+               git fetch >../actual.out 2>../actual.err &&
+               # cleanup
+               git config --unset fetch.recurseSubmodules &&
+               git reset --hard
+       ) &&
+       test_i18ncmp expect.out actual.out &&
+       test_i18ncmp expect.err.2 actual.err &&
+       git checkout HEAD^ -- .gitmodules &&
+       git add .gitmodules &&
+       git commit -m "new submodule restored .gitmodules"
 '
 
 test_expect_success 'fetching submodules respects parallel settings' '