void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
const char *path);
+void gitmodules_config();
int parse_submodule_config_option(const char *var, const char *value);
void handle_ignore_submodules_arg(struct diff_options *diffopt, const char *);
void show_submodule_summary(FILE *f, const char *path,