Function check_git_cmd

builtin/help.c:579–624

}

static char *check_git_cmd(const char *cmd)
{
	char *alias;

	if (is_git_command(cmd))
		return xstrdup(cmd);

	alias = alias_lookup(cmd);
	if (alias) {
		const char **argv;
		int count;

		/*
		 * handle_builtin() in git.c rewrites "git cmd --help"
		 * to "git help --exclude-guides cmd", so we can use
		 * exclude_guides to distinguish "git cmd --help" from
		 * "git help cmd". In the latter case, or if cmd is an
		 * alias for a shell command, just print the alias
		 * definition.
		 */
		if (!exclude_guides || alias[0] == '!') {
			printf_ln(_("'%s' is aliased to '%s'"), cmd, alias);
			free(alias);
			exit(0);
		}
		/*
		 * Otherwise, we pretend that the command was "git
		 * word0 --help". We use split_cmdline() to get the
		 * first word of the alias, to ensure that we use the
		 * same rules as when the alias is actually
		 * used. split_cmdline() modifies alias in-place.
		 */
		fprintf_ln(stderr, _("'%s' is aliased to '%s'"), cmd, alias);
		count = split_cmdline(alias, &argv);
		if (count < 0)
			die(_("bad alias.%s string: %s"), cmd,
			    split_cmdline_strerror(count));
		free(argv);
		return alias;
	}

	if (exclude_guides)
		return help_unknown_cmd(cmd);

	return xstrdup(cmd);
}

static void no_help_format(const char *opt_mode, enum help_format fmt)
{