gnus: Customizations

 
 8.1.3.9 Customizations
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 ‘nnir-method-default-engines’
      Alist of pairs of server backends and search engines.  The default
      associations are
           (nnimap . imap)
           (nntp . gmane)
 
 ‘nnir-ignored-newsgroups’
      A regexp to match newsgroups in the active file that should be
      skipped when searching all groups on a server.
 
 ‘nnir-summary-line-format’
      The format specification to be used for lines in an nnir summary
      buffer.  All the items from ‘gnus-summary-line-format’ are
      available, along with three items unique to nnir summary buffers:
 
           %Z    Search retrieval score value (integer)
           %G    Article original full group name (string)
           %g    Article original short group name (string)
 
      If ‘nil’ (the default) this will use ‘gnus-summary-line-format’.
 
 ‘nnir-retrieve-headers-override-function’
      If non-‘nil’, a function that retrieves article headers rather than
      using the gnus built-in function.  This function takes an article
      list and group as arguments and populates the ‘nntp-server-buffer’
      with the retrieved headers.  It should then return either ’nov or
      ’headers indicating the retrieved header format.  Failure to
      retrieve headers should return ‘nil’.
 
      If this variable is ‘nil’, or if the provided function returns
      ‘nil’ for a search result, ‘gnus-retrieve-headers’ will be called
      instead."