code: def integrations(since, to, write, force):
      
      agent_tags = get_agent_tags(since, to)
      # get the list of integrations shipped with the agent from the requirements file
      req_file_name = os.path.basename(get_agent_release_requirements())
  
      integrations_contents = StringIO()
      for tag in agent_tags:
          integrations_contents.write('## Datadog Agent version {}\n\n'.format(tag))
          # Requirements for current tag
          file_contents = git_show_file(req_file_name, tag)
          for name, ver in iteritems(parse_agent_req_file(file_contents)):
              integrations_contents.write('* {}: {}\n'.format(name, ver))
          integrations_contents.write('\n')
  
      # save the changelog on disk if --write was passed
      if write:
          dest = get_agent_integrations_file()
          # don't overwrite an existing file
          if os.path.exists(dest) and not force:
              msg = "Output file {} already exists, run the command again with --force to overwrite"
              abort(msg.format(dest))
  
          write_file(dest, integrations_contents.getvalue())
      else:
          echo_info(integrations_contents.getvalue())
docs: Generates a markdown file containing the list of integrations shipped in a
      given Agent release. Agent version numbers are derived inspecting tags on
      `integrations-core` so running this tool might provide unexpected results
      if the repo is not up to date with the Agent release process.
  
      If neither `--since` or `--to` are passed (the most common use case), the
      tool will generate the list for every Agent since version 6.3.0
      (before that point we don't have enough information to build the log).