Merge branch 'sb/pull-rebase-submodule'

"git pull --rebase --recurse-submodules" learns to rebase the
branch in the submodules to an updated base.

* sb/pull-rebase-submodule:
  builtin/fetch cleanup: always set default value for submodule recursing
  pull: optionally rebase submodules (remote submodule changes only)
  builtin/fetch: parse recurse-submodules-default at default options parsing
  builtin/fetch: factor submodule recurse parsing out to submodule config

submodule.c

@@ -1138,6 +1138,32 @@ static void calculate_changed_submodule_paths(void)
 	initialized_fetch_ref_tips = 0;
 }
 
+int submodule_touches_in_range(struct object_id *excl_oid,
+			       struct object_id *incl_oid)
+{
+	struct string_list subs = STRING_LIST_INIT_DUP;
+	struct argv_array args = ARGV_ARRAY_INIT;
+	int ret;
+
+	gitmodules_config();
+	/* No need to check if there are no submodules configured */
+	if (!submodule_from_path(NULL, NULL))
+		return 0;
+
+	argv_array_push(&args, "--"); /* args[0] program name */
+	argv_array_push(&args, oid_to_hex(incl_oid));
+	argv_array_push(&args, "--not");
+	argv_array_push(&args, oid_to_hex(excl_oid));
+
+	collect_changed_submodules(&subs, &args);
+	ret = subs.nr;
+
+	argv_array_clear(&args);
+
+	free_submodules_oids(&subs);
+	return ret;
+}
+
 struct submodule_parallel_fetch {
 	int count;
 	struct argv_array args;