code: def main(*args):
      r
      # Create parser, read arguments from direct input or command line
      with disable_error_handler():
          args = parse_args(args or sys.argv[1:])
  
      # Read current config from file and command line arguments
      config = read_config(args.config, args)
      if config is None:
          return True
      bootstrap = config[__script__]
  
      # Check pre-requirements
      if not check_pre_requirements(bootstrap['pre_requirements']):
          return True
  
      # Create virtual environment
      env_args = prepare_args(config['virtualenv'], bootstrap)
      if not create_env(
          bootstrap['env'],
          env_args,
          bootstrap['recreate'],
          bootstrap['ignore_activated'],
          bootstrap['quiet']
      ):
          # Exit if couldn't create virtual environment
          return True
  
      # And install library or project here
      pip_args = prepare_args(config['pip'], bootstrap)
      if not install(
          bootstrap['env'],
          bootstrap['requirements'],
          pip_args,
          bootstrap['ignore_activated'],
          bootstrap['install_dev_requirements'],
          bootstrap['quiet']
      ):
          # Exist if couldn't install requirements into venv
          return True
  
      # Run post-bootstrap hook
      run_hook(bootstrap['hook'], bootstrap, bootstrap['quiet'])
  
      # All OK!
      if not bootstrap['quiet']:
          print_message('All OK!')
  
      # False means everything went alright, exit code: 0
      return False
docs: r"""Bootstrap Python projects and libraries with virtualenv and pip.
  
      Also check system requirements before bootstrap and run post bootstrap
      hook if any.
  
      :param \*args: Command line arguments list.