function parse_command_line()

in loader/dbloader.js [40:124]

• 68 lines of code
• 6 McCabe index (conditional complexity)

function parse_command_line() {
  var i, len, handler, options;
  handler = new CommandLine.FlagHandler();

  options = {
    "adapter"    : "ndb",
    "plugin"     : new LoaderModule(handler),
    "deployment" : "test"
  };

  handler.addOption(new CommandLine.Option(
    "-a", "--adapter=<adapter>",
    "Use Jones database driver <adapter> (default: ndb)",
    function(nextArg) {
      if(typeof nextArg === 'string') {
        options.adapter = nextArg;
        return 1;
      }
      return -1;  // adapter is required
    }));
  handler.addOption(new CommandLine.Option(
    null, "--stats", "collect statistics", function(nextArg) {
      options.stats = true;
      return 0;
    }));
  handler.addOption(new CommandLine.Option(
    "-d", "--debug", "enable debugging output", function(nextArg) {
      unified_debug.on();
      unified_debug.level_debug();
      return 0;
      }));
  handler.addOption(new CommandLine.Option(
    null, "-df", "enable debugging output from <source_file>", function(nextArg) {
      unified_debug.on();
      unified_debug.set_file_level(nextArg, 5);
      return 1;
    }));
  handler.addOption(new CommandLine.Option(
    "-c", null, "<ndb_connect_string>", function(nextArg) {
      options.connect_string = nextArg;
      return 1;
    }));
  handler.addOption(new CommandLine.Option(
    "-f", null, "<control_file>", function(nextArg) {
      options.control_file = nextArg;
      return 1;
    }));
  handler.addOption(new CommandLine.Option(
    "-e", null, "<load_data_command_text>", function(nextArg) {
      options.control_text = nextArg;
      return 1;
    }));
  handler.addOption(new CommandLine.Option(
    "-j", null, "<javascript_plugin_file>", function(nextArg) {
      /* Here is the code that actually loads the user's module: */
      var modulePath;
      options.plugin_file = nextArg;
      modulePath = options.plugin_file;
      // Assume the module path is relative to PWD unless it begins with / or .
      if(modulePath[0] !== "." && modulePath[0] !== "/") {
        modulePath = "./" + modulePath;
      }
      require(modulePath).init(options.plugin);
      return 1;
    }));
  handler.addOption(new CommandLine.Option(
    "-h", "--help", "show usage", function(nextArg) {
      usage(handler);
      process.exit(1);
    }));
  handler.addOption(new CommandLine.Option(
    "-E", "--deployment=<name>",
    "use deployment <name> from jones_deployments.js",
    function(thisArg) {
      options.deployment = thisArg;
      return 1;
    }));

  handler.processArguments();

  if(! (options.control_file || options.control_text || options.plugin)) {
    usage(handler);
  }
  return options;
}