saveException(e);
            }
        }

        private void mvn(CommandInput input) {
            try {
                shellMavenInvoker.invoke(mavenParser.parseInvocation(
                        ParserRequest.mvn(input.args(), shellContext.invokerRequest.messageBuilderFactory())
                                .cwd(shellContext.cwd.get())
                                .build()));

                extra.put("session.rootDirectory", rootDirectory.toString());
            }
            return extra;
        }
    }

    @Override
    public InvokerRequest parseInvocation(ParserRequest parserRequest) {
        requireNonNull(parserRequest);

        LocalContext context = new LocalContext(parserRequest);

        // the basics
        try {