submodule sync: do not auto-vivify uninteresting submodule

diff --git a/git-submodule.sh b/git-submodule.sh
index c291eed59cca35d4b08285133acaca29bd80d372..ce659714fe42aa1ab9506cb37956226e4b53b25c 100755 (executable)
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -836,17 +836,20 @@ cmd_sync()
                        ;;
                esac
 
-               say "Synchronizing submodule url for '$name'"
-               git config submodule."$name".url "$url"
-
-               if test -e "$path"/.git
+               if git config "submodule.$name.url" >/dev/null 2>/dev/null
                then
-               (
-                       clear_local_git_env
-                       cd "$path"
-                       remote=$(get_default_remote)
-                       git config remote."$remote".url "$url"
-               )
+                       say "Synchronizing submodule url for '$name'"
+                       git config submodule."$name".url "$url"
+
+                       if test -e "$path"/.git
+                       then
+                       (
+                               clear_local_git_env
+                               cd "$path"
+                               remote=$(get_default_remote)
+                               git config remote."$remote".url "$url"
+                       )
+                       fi
                fi
        done
 }