Method main

java/org/apache/catalina/startup/Tool.java:115–230

The main program for the bootstrap. @param args Command line arguments to be processed

(String[] args)

     * @param args Command line arguments to be processed
     */
    @SuppressWarnings("null")
    public static void main(String[] args) {

        // Verify that "catalina.home" was passed.
        if (catalinaHome == null) {
            log.error("Must set '" + Constants.CATALINA_HOME_PROP + "' system property");
            System.exit(1);
        }

        // Process command line options
        int index = 0;
        label:
        while (true) {
            if (index == args.length) {
                usage();
                System.exit(1);
            }
            switch (args[index]) {
                case "-ant":
                    ant = true;
                    break;
                case "-common":
                    common = true;
                    break;
                case "-server":
                    server = true;
                    break;
                case "-shared":
                    shared = true;
                    break;
                default:
                    break label;
            }
            index++;
        }

        // Set "ant.home" if requested
        if (ant) {
            System.setProperty("ant.home", catalinaHome);
        }

        // Construct the class loader we will be using
        ClassLoader classLoader = null;
        try {
            List<File> packed = new ArrayList<>();
            List<File> unpacked = new ArrayList<>();
            unpacked.add(new File(catalinaHome, "classes"));
            packed.add(new File(catalinaHome, "lib"));
            if (common) {
                unpacked.add(new File(catalinaHome, "common" + File.separator + "classes"));
                packed.add(new File(catalinaHome, "common" + File.separator + "lib"));
            }
            if (server) {
                unpacked.add(new File(catalinaHome, "server" + File.separator + "classes"));
                packed.add(new File(catalinaHome, "server" + File.separator + "lib"));
            }
            if (shared) {
                unpacked.add(new File(catalinaHome, "shared" + File.separator + "classes"));