Function module_add

builtin/submodule--helper.c:3642–3801

}

static int module_add(int argc, const char **argv, const char *prefix,
		      struct repository *repo UNUSED)
{
	int force = 0, quiet = 0, progress = 0, dissociate = 0;
	struct add_data add_data = ADD_DATA_INIT;
	const char *ref_storage_format = NULL;
	char *to_free = NULL;
	const struct submodule *existing;
	struct strbuf buf = STRBUF_INIT;
	char *sm_name_to_free = NULL;
	struct option options[] = {
		OPT_STRING('b', "branch", &add_data.branch, N_("branch"),
			   N_("branch of repository to add as submodule")),
		OPT__FORCE(&force, N_("allow adding an otherwise ignored submodule path"),
			   PARSE_OPT_NOCOMPLETE),
		OPT__QUIET(&quiet, N_("print only error messages")),
		OPT_BOOL(0, "progress", &progress, N_("force cloning progress")),
		OPT_STRING(0, "reference", &add_data.reference_path, N_("repository"),
			   N_("reference repository")),
		OPT_STRING(0, "ref-format", &ref_storage_format, N_("format"),
			   N_("specify the reference format to use")),
		OPT_BOOL(0, "dissociate", &dissociate, N_("borrow the objects from reference repositories")),
		OPT_STRING(0, "name", &add_data.sm_name, N_("name"),
			   N_("sets the submodule's name to the given string "
			      "instead of defaulting to its path")),
		OPT_INTEGER(0, "depth", &add_data.depth, N_("depth for shallow clones")),
		OPT_END()
	};
	const char *const usage[] = {
		N_("git submodule add [<options>] [--] <repository> [<path>]"),
		NULL
	};
	struct strbuf sb = STRBUF_INIT;
	int ret = 1;

	argc = parse_options(argc, argv, prefix, options, usage, 0);

	if (!is_writing_gitmodules_ok())
		die(_("please make sure that the .gitmodules file is in the working tree"));

	if (prefix && *prefix &&
	    add_data.reference_path && !is_absolute_path(add_data.reference_path))
		add_data.reference_path = xstrfmt("%s%s", prefix, add_data.reference_path);

	if (argc == 0 || argc > 2)
		usage_with_options(usage, options);

	if (ref_storage_format) {
		add_data.ref_storage_format = ref_storage_format_by_name(ref_storage_format);
		if (add_data.ref_storage_format == REF_STORAGE_FORMAT_UNKNOWN)
			die(_("unknown ref storage format '%s'"), ref_storage_format);
	}

	add_data.repo = argv[0];
	if (argc == 1)
		add_data.sm_path = git_url_basename(add_data.repo, 0, 0);
	else
		add_data.sm_path = xstrdup(argv[1]);