fix segfault showing an empty remote

diff --git a/git-submodule.sh b/git-submodule.sh
index 7c2e060ae770710ed7ed27d0aed4cfd2e8145810..8e234a4028d22e11baedba11f871d33f56945716 100755 (executable)
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -204,8 +204,15 @@ cmd_add()
        else
 
                module_clone "$path" "$realrepo" || exit
-               (unset GIT_DIR; cd "$path" && git checkout -f -q ${branch:+-b "$branch" "origin/$branch"}) ||
-               die "Unable to checkout submodule '$path'"
+               (
+                       unset GIT_DIR
+                       cd "$path" &&
+                       # ash fails to wordsplit ${branch:+-b "$branch"...}
+                       case "$branch" in
+                       '') git checkout -f -q ;;
+                       ?*) git checkout -f -q -b "$branch" "origin/$branch" ;;
+                       esac
+               ) || die "Unable to checkout submodule '$path'"
        fi
 
        git add "$path" ||