Function: gnus-newsrc-parse-options

gnus-newsrc-parse-options is an autoloaded and byte-compiled function defined in gnus-start.el.gz.

Signature

(gnus-newsrc-parse-options OPTIONS)

Source Code

;; Defined in /usr/src/emacs/lisp/gnus/gnus-start.el.gz
;; Parse options lines to find "options -n !all rec.all" and stuff.
;; The return value will be a list on the form
;; ((regexp1 . ignore)
;;  (regexp2 . subscribe)...)
;; When handling new newsgroups, groups that match a `ignore' regexp
;; will be ignored, and groups that match a `subscribe' regexp will be
;; subscribed.  A line like
;; options -n !all rec.all
;; will lead to a list that looks like
;; (("^rec\\..+" . subscribe)
;;  ("^.+" . ignore))
;; So all "rec.*" groups will be subscribed, while all the other
;; groups will be ignored.  Note that "options -n !all rec.all" is very
;; different from "options -n rec.all !all".
(defun gnus-newsrc-parse-options (options)
  (let (out eol)
    (save-excursion
      (gnus-set-work-buffer)
      (insert (regexp-quote options))
      ;; First we treat all continuation lines.
      (goto-char (point-min))
      (while (re-search-forward "\n[ \t]+" nil t)
	(replace-match " " t t))
      ;; Then we transform all "all"s into ".+"s.
      (goto-char (point-min))
      (while (re-search-forward "\\ball\\b" nil t)
	(replace-match ".+" t t))
      (goto-char (point-min))
      ;; We remove all other options than the "-n" ones.
      (while (re-search-forward "[ \t]-[^n][^-]*" nil t)
	(replace-match " ")
	(forward-char -1))
      (goto-char (point-min))

      ;; We are only interested in "options -n" lines - we
      ;; ignore the other option lines.
      (while (re-search-forward "[ \t]-n" nil t)
	(setq eol
	      (or (save-excursion
		    (and (re-search-forward "[ \t]-n" (point-at-eol) t)
			 (- (point) 2)))
		  (point-at-eol)))
	;; Search for all "words"...
	(while (re-search-forward "[^ \t,\n]+" eol t)
	  (if (eq (char-after (match-beginning 0)) ?!)
	      ;; If the word begins with a bang (!), this is a "not"
	      ;; spec.  We put this spec (minus the bang) and the
	      ;; symbol `ignore' into the list.
	      (push (cons (concat
			   "^" (buffer-substring
				(1+ (match-beginning 0))
				(match-end 0))
			   "\\($\\|\\.\\)")
			  'ignore)
		    out)
	    ;; There was no bang, so this is a "yes" spec.
	    (push (cons (concat "^" (match-string 0) "\\($\\|\\.\\)")
			'subscribe)
		  out))))

      (setq gnus-newsrc-options-n out))))