code: def ghissue_role(name, rawtext, text, lineno, inliner, options={}, content=[]):
      
  
      try:
          issue_num = int(text)
          if issue_num <= 0:
              raise ValueError
      except ValueError:
          msg = inliner.reporter.error(
              'GitHub issue number must be a number greater than or equal to 1; '
              '"%s" is invalid.' % text, line=lineno)
          prb = inliner.problematic(rawtext, rawtext, msg)
          return [prb], [msg]
      app = inliner.document.settings.env.app
      #app.info('issue %r' % text)
      if 'pull' in name.lower():
          category = 'pull'
      elif 'issue' in name.lower():
          category = 'issues'
      else:
          msg = inliner.reporter.error(
              'GitHub roles include "ghpull" and "ghissue", '
              '"%s" is invalid.' % name, line=lineno)
          prb = inliner.problematic(rawtext, rawtext, msg)
          return [prb], [msg]
      node = make_link_node(rawtext, app, category, str(issue_num), options)
      return [node], []
docs: Link to a GitHub issue.
  
      Returns 2 part tuple containing list of nodes to insert into the
      document and a list of system messages.  Both are allowed to be
      empty.
  
      :param name: The role name used in the document.
      :param rawtext: The entire markup snippet, with role.
      :param text: The text marked with the role.
      :param lineno: The line number where rawtext appears in the input.
      :param inliner: The inliner instance that called us.
      :param options: Directive options for customization.
      :param content: The directive content for customization.