old_contents: # -*- coding: utf-8 -*-
  
  from fabric.api import cd, env, run
  from .. import signal, configuration
  
  def init():
      configuration.setdefault('curl_url', '')
      configuration.setdefault('curl_options', '')
      signal.register('deploy.updating', download_artifact)
  
  def download_artifact(**kwargs):
      with cd(env.release_path):
          run('curl %(curl_url)s %(curl_options)s' % env)
  
new_contents: # -*- coding: utf-8 -*-
  
  from fabric.api import cd, env, run
  from .. import signal, configuration
  
  def init():
      configuration.setdefault('curl_url', '')
      configuration.setdefault('curl_options', '')
      configuration.setdefault('curl_extract_tar', '')
      configuration.setdefault('curl_postinstall_script', '')
      signal.register('deploy.updating', download_artifact)
  
  def download_artifact(**kwargs):
      with cd(env.release_path):
          cmd = 'curl %(curl_url)s %(curl_options)s' % env
          if env.curl_extract_tar:
              cmd += ' | tar -x'
          run(cmd)
          if env.curl_postinstall_script:
              run(env.curl_postinstall_script)
  
subject: Add extract_tar and post_install_script option.