Function cmd_help

builtin/help.c:662–769

}

int cmd_help(int argc,
	     const char **argv,
	     const char *prefix,
	     struct repository *repo UNUSED)
{
	int nongit;
	enum help_format parsed_help_format;
	char *command = NULL;
	const char *page;

	argc = parse_options(argc, argv, prefix, builtin_help_options,
			builtin_help_usage, 0);
	parsed_help_format = help_format;

	if (cmd_mode != HELP_ACTION_ALL &&
	    (show_external_commands >= 0 ||
	     show_aliases >= 0))
		usage_msg_opt(_("the '--no-[external-commands|aliases]' options can only be used with '--all'"),
			      builtin_help_usage, builtin_help_options);

	switch (cmd_mode) {
	case HELP_ACTION_ALL:
		opt_mode_usage(argc, "--all", help_format);
		if (verbose) {
			setup_pager(the_repository);
			list_all_cmds_help(show_external_commands,
					   show_aliases);
			return 0;
		}
		printf(_("usage: %s%s"), _(git_usage_string), "\n\n");
		load_command_list("git-", &main_cmds, &other_cmds);
		list_commands(&main_cmds, &other_cmds);
		printf("%s\n", _(git_more_info_string));
		break;
	case HELP_ACTION_GUIDES:
		opt_mode_usage(argc, "--guides", help_format);
		list_guides_help();
		printf("%s\n", _(git_more_info_string));
		return 0;
	case HELP_ACTION_CONFIG_FOR_COMPLETION:
		opt_mode_usage(argc, "--config-for-completion", help_format);
		list_config_help(SHOW_CONFIG_VARS);
		return 0;
	case HELP_ACTION_USER_INTERFACES:
		opt_mode_usage(argc, "--user-interfaces", help_format);
		list_user_interfaces_help();
		return 0;
	case HELP_ACTION_DEVELOPER_INTERFACES:
		opt_mode_usage(argc, "--developer-interfaces", help_format);
		list_developer_interfaces_help();
		return 0;
	case HELP_ACTION_CONFIG_SECTIONS_FOR_COMPLETION:
		opt_mode_usage(argc, "--config-sections-for-completion",
			       help_format);
		list_config_help(SHOW_CONFIG_SECTIONS);
		return 0;
	case HELP_ACTION_ALIASES_FOR_COMPLETION: {
		struct string_list alias_list = STRING_LIST_INIT_DUP;