Merge branch 'jt/submodule-on-demand'

Push all submodules recursively with
'--recurse-submodules=on-demand'.

* jt/submodule-on-demand:
  Doc: document push.recurseSubmodules=only

submodule.c

@@ -1130,6 +1130,12 @@ static int push_submodule(const char *path,
 	if (for_each_remote_ref_submodule(path, has_remote, NULL) > 0) {
 		struct child_process cp = CHILD_PROCESS_INIT;
 		strvec_push(&cp.args, "push");
+		/*
+		 * When recursing into a submodule, treat any "only" configurations as "on-
+		 * demand", since "only" would not work (we need all submodules to be pushed
+		 * in order to be able to push the superproject).
+		 */
+		strvec_push(&cp.args, "--recurse-submodules=only-is-on-demand");
 		if (dry_run)
 			strvec_push(&cp.args, "--dry-run");