lib/classes/CLI.js/CLI/displayHelp
class CLI:  displayHelp(processedInput) {
    const commands = processedInput.commands;
    const options = processedInput.options;

    // if only "version" or "v" was entered
    if (
      (commands.length === 0 && (options.version || options.v)) ||
      (commands.length === 1 && commands.indexOf('version') > -1)
    ) {
      this.getVersionNumber();
      return true;
    }

    // if only "--help-interactive" was entered
    if (commands.length === 0 && options['help-interactive']) {
      this.generateInteractiveCliHelp();
      return true;
    }

    // if only "help" or "h" was entered
    if (
      commands.length === 0 ||
      (commands.length === 0 && (options.help || options.h)) ||
      (commands.length === 1 && commands.indexOf('help') > -1)
    ) {
      if (options.verbose || options.v) {
        this.generateVerboseHelp();
      } else {
        this.generateMainHelp();
      }
      return true;
    }

    // if "help" was entered in combination with commands (or one command)
    if (commands.length >= 1 && (options.help || options.h)) {
      this.generateCommandsHelp(commands);
      return true;
    }
    return false;
  }