%define add_sysuser(-) %{lua:
    if arg[1] == '-b' then	
        prefix = ''		\
        table.remove(arg, 1)		\
    else		\
        prefix = 'Provides: '		\
    end		\
    if #arg < 2 then		\
        macros.error({'not enough arguments'})		\
    end		\
    if arg[1] == 'g' then		\
        type = 'group'		\
    elseif arg[1] == 'u!' then		\
        type = 'user'		\
    elseif arg[1] == 'r' or arg[1] == 'm' then		\
        macros.warn({'ignoring unsupported sysuser type: '..arg[1]})		\
        return		\
    else		\
        macros.error({'invalid sysuser type: '..arg[1]})		\
    end		\
    name = arg[2]		\
    line = table.concat(arg, ' ')		\
    -- \0-pad source string to avoid '=' in the output		\
    llen = line:len()		\
    ulen = math.ceil(4 * (llen / 3))		\
    plen = 4 * math.ceil(llen / 3)		\
    pad = string.rep('\\0', plen-ulen)		\
    enc = rpm.b64encode(line..pad, 0);		\
		\
    print(string.format('%s%s(%s) = %s\\n', prefix, type, name, enc))		\
    if type == 'user' then		\
        print(string.format('%s%s(%s)\\n', prefix, 'group', name))		\
    end		\
}	
%{nil}