protected Commandline buildUpdateCommand() {
Commandline commandLine = new Commandline();
commandLine.setExecutable("cleartool");
commandLine.createArgument().setValue("update");
commandLine.createArgument().setValue("-force");
commandLine.createArgument().setValue("-log");
commandLine.createArgument().setValue(isWindows() ? "NUL" : "/dev/nul");
commandLine.createArgument().setValue(getFullPathFileName());