public int boot()

in gshell-cli/src/main/java/org/apache/geronimo/gshell/cli/Main.java [180:267]
62 lines of code
12 McCabe index (conditional complexity)

    public int boot(final String[] args) throws Exception {
        assert args != null;

        System.setProperty("jline.terminal", AutoDetectedTerminal.class.getName());

        // Default is to be quiet
        setConsoleLogLevel("WARN");

        CommandLineProcessor clp = new CommandLineProcessor(this);
        clp.setStopAtNonOption(true);
        clp.process(args);

        // Setup a refereence for our exit code so our callback thread can tell if we've shutdown normally or not
        final AtomicReference<Integer> codeRef = new AtomicReference<Integer>();
        int code = ExitNotification.DEFAULT_CODE;

        Runtime.getRuntime().addShutdownHook(new Thread("GShell Shutdown Hook") {
            public void run() {
                if (codeRef.get() == null) {
                    // Give the user a warning when the JVM shutdown abnormally, normal shutdown
                    // will set an exit code through the proper channels

                    if (!io.isSilent()) {
                        io.err.println();
                        io.err.println(messages.getMessage("warning.abnormalShutdown"));
                    }
                }

                io.flush();
            }
        });

        try {
            ShellBuilder builder = new ShellBuilderImpl();
            builder.setClassLoader(getClass().getClassLoader());
            builder.setIo(io);

            if (!io.isQuiet() && !io.isSilent()) {
                // Configure the download monitor
                ArtifactResolver artifactResolver = builder.getContainer().getBean(ArtifactResolver.class);
                artifactResolver.setTransferListener(new ProgressSpinnerMonitor(io));
            }

            // --help and --version need access to the application's information, so we have to handle these options late
            if (help|version) {
                ApplicationModel applicationModel = builder.getApplicationModel();

                if (help) {
                    Printer printer = new Printer(clp);
                    printer.setMessageSource(messages);
                    printer.printUsage(io.out, applicationModel.getBranding().getProgramName());
                }
                else if (version) {
                    io.out.println(applicationModel.getVersion());
                }

                io.out.flush();

                throw new ExitNotification();
            }

            // Build the shell instance
            Shell gshell = builder.create();

            // clp gives us a list, but we need an array
            String[] _args = {};
            if (commandArgs != null) {
                _args = commandArgs.toArray(new String[commandArgs.size()]);
            }

            if (commands != null) {
                gshell.execute(commands);
            }
            else if (interactive) {
                gshell.run(_args);
            }
            else {
                gshell.execute(_args);
            }
        }
        catch (ExitNotification n) {
            code = n.code;
        }

        codeRef.set(code);

        return code;
    }