submodule: document failure to handle relative superproject origin URLs

diff --git a/t/t7403-submodule-sync.sh b/t/t7403-submodule-sync.sh
index 3620215c1f84b8e184b470c92b9a01c15fd75dc2..56b933da45a761988a278c1edc53bb6c724e0c77 100755 (executable)
--- a/t/t7403-submodule-sync.sh
+++ b/t/t7403-submodule-sync.sh
@@ -26,7 +26,9 @@ test_expect_success setup '
        (cd super-clone && git submodule update --init) &&
        git clone super empty-clone &&
        (cd empty-clone && git submodule init) &&
-       git clone super top-only-clone
+       git clone super top-only-clone &&
+       git clone super relative-clone &&
+       (cd relative-clone && git submodule update --init)
 '
 
 test_expect_success 'change submodule' '
@@ -86,4 +88,90 @@ test_expect_success '"git submodule sync" should not vivify uninteresting submod
        )
 '
 
+test_expect_failure '"git submodule sync" handles origin URL of the form foo' '
+       (cd relative-clone &&
+        git remote set-url origin foo &&
+        git submodule sync &&
+       (cd submodule &&
+        #actual fails with: "cannot strip off url foo
+        test "$(git config remote.origin.url)" = "../submodule"
+       )
+       )
+'
+
+test_expect_failure '"git submodule sync" handles origin URL of the form foo/bar' '
+       (cd relative-clone &&
+        git remote set-url origin foo/bar &&
+        git submodule sync &&
+       (cd submodule &&
+        #actual foo/submodule
+        test "$(git config remote.origin.url)" = "../foo/submodule"
+       )
+       )
+'
+
+test_expect_failure '"git submodule sync" handles origin URL of the form ./foo' '
+       (cd relative-clone &&
+        git remote set-url origin ./foo &&
+        git submodule sync &&
+       (cd submodule &&
+        #actual ./submodule
+        test "$(git config remote.origin.url)" = "../submodule"
+       )
+       )
+'
+
+test_expect_failure '"git submodule sync" handles origin URL of the form ./foo/bar' '
+       (cd relative-clone &&
+        git remote set-url origin ./foo/bar &&
+        git submodule sync &&
+       (cd submodule &&
+        #actual ./foo/submodule
+        test "$(git config remote.origin.url)" = "../foo/submodule"
+       )
+       )
+'
+
+test_expect_failure '"git submodule sync" handles origin URL of the form ../foo' '
+       (cd relative-clone &&
+        git remote set-url origin ../foo &&
+        git submodule sync &&
+       (cd submodule &&
+        #actual ../submodule
+        test "$(git config remote.origin.url)" = "../../submodule"
+       )
+       )
+'
+
+test_expect_failure '"git submodule sync" handles origin URL of the form ../foo/bar' '
+       (cd relative-clone &&
+        git remote set-url origin ../foo/bar &&
+        git submodule sync &&
+       (cd submodule &&
+        #actual ../foo/submodule
+        test "$(git config remote.origin.url)" = "../../foo/submodule"
+       )
+       )
+'
+
+test_expect_failure '"git submodule sync" handles origin URL of the form ../foo/bar with deeply nested submodule' '
+       (cd relative-clone &&
+        git remote set-url origin ../foo/bar &&
+        mkdir -p a/b/c &&
+        ( cd a/b/c &&
+          git init &&
+          :> .gitignore &&
+          git add .gitignore &&
+          test_tick &&
+          git commit -m "initial commit" ) &&
+        git submodule add ../bar/a/b/c ./a/b/c &&
+        git submodule sync &&
+       (cd a/b/c &&
+        #actual ../foo/bar/a/b/c
+        test "$(git config remote.origin.url)" = "../../../../foo/bar/a/b/c"
+       )
+       )
+'
+
+
 test_done