docs: def get_repo_keys():
      '''
      .. versionadded:: 2017.7.0
  
      List known repo key details.
  
      :return: A dictionary containing the repo keys.
      :rtype: dict
  
      CLI Examples:
  
      .. code-block:: bash
  
          salt '*' pkg.get_repo_keys
      '''
      ret = dict()
      repo_keys = list()
  
      # The double usage of '--with-fingerprint' is necessary in order to
      # retrieve the fingerprint of the subkey.
      cmd = ['apt-key', 'adv', '--batch', '--list-public-keys', '--with-fingerprint',
             '--with-fingerprint', '--with-colons', '--fixed-list-mode']
  
      cmd_ret = _call_apt(cmd, scope=False)
  
      if cmd_ret['retcode'] != 0:
          log.error(cmd_ret['stderr'])
          return ret
  
      lines = [line for line in cmd_ret['stdout'].splitlines() if line.strip()]
  
      # Reference for the meaning of each item in the colon-separated
      # record can be found here: https://goo.gl/KIZbvp
      for line in lines:
          items = [_convert_if_int(item.strip()) if item.strip() else None for item in line.split(':')]
          key_props = dict()
  
          if len(items) < 2:
              log.debug('Skipping line: %s', line)
              continue
  
          if items[0] in ('pub', 'sub'):
              key_props.update({
                  'algorithm': items[3],
                  'bits': items[2],
                  'capability': items[11],
                  'date_creation': items[5],
                  'date_expiration': items[6],
                  'keyid': items[4],
                  'validity': items[1]
              })
  
              if items[0] == 'pub':
                  repo_keys.append(key_props)
              else:
                  repo_keys[-1]['subkey'] = key_props
          elif items[0] == 'fpr':
              if repo_keys[-1].get('subkey', False):
                  repo_keys[-1]['subkey'].update({'fingerprint': items[9]})
              else:
                  repo_keys[-1].update({'fingerprint': items[9]})
          elif items[0] == 'uid':
              repo_keys[-1].update({
                  'uid': items[9],
                  'uid_hash': items[7]
              })
  
      for repo_key in repo_keys:
          ret[repo_key['keyid']] = repo_key
      return ret