1 ;;; gnus-agent.el --- unplugged support for Semi-gnus
2 ;; Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
3 ;; Free Software Foundation, Inc.
5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
6 ;; Tatsuya Ichikawa <t-ichi@po.shiojiri.ne.jp>
7 ;; This file is part of GNU Emacs.
9 ;; GNU Emacs is free software; you can redistribute it and/or modify
10 ;; it under the terms of the GNU General Public License as published by
11 ;; the Free Software Foundation; either version 2, or (at your option)
14 ;; GNU Emacs is distributed in the hope that it will be useful,
15 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
16 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 ;; GNU General Public License for more details.
19 ;; You should have received a copy of the GNU General Public License
20 ;; along with GNU Emacs; see the file COPYING. If not, write to the
21 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 ;; Boston, MA 02111-1307, USA.
28 (eval-when-compile (require 'cl))
29 (eval-when-compile (require 'gnus-clfns))
40 (if (featurep 'xemacs)
43 (require 'gnus-group))
46 (autoload 'gnus-server-update-server "gnus-srvr")
47 (autoload 'gnus-agent-customize-category "gnus-cus")
50 (defcustom gnus-agent-directory (nnheader-concat gnus-directory "agent/")
51 "Where the Gnus agent will store its files."
55 (defcustom gnus-agent-plugged-hook nil
56 "Hook run when plugging into the network."
60 (defcustom gnus-agent-unplugged-hook nil
61 "Hook run when unplugging from the network."
65 (defcustom gnus-agent-fetched-hook nil
66 "Hook run when finished fetching articles."
70 (defcustom gnus-agent-handle-level gnus-level-subscribed
71 "Groups on levels higher than this variable will be ignored by the Agent."
75 (defcustom gnus-agent-expire-days 7
76 "Read articles older than this will be expired.
77 This can also be a list of regexp/day pairs. The regexps will be
78 matched against group names."
80 :type '(choice (number :tag "days")
81 (sexp :tag "List" nil)))
83 (defcustom gnus-agent-expire-all nil
84 "If non-nil, also expire unread, ticked and dormant articles.
85 If nil, only read articles will be expired."
89 (defcustom gnus-agent-group-mode-hook nil
90 "Hook run in Agent group minor modes."
94 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
95 (when (featurep 'xemacs)
96 (add-hook 'gnus-agent-group-mode-hook 'gnus-xmas-agent-group-menu-add))
98 (defcustom gnus-agent-summary-mode-hook nil
99 "Hook run in Agent summary minor modes."
103 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
104 (when (featurep 'xemacs)
105 (add-hook 'gnus-agent-summary-mode-hook 'gnus-xmas-agent-summary-menu-add))
107 (defcustom gnus-agent-server-mode-hook nil
108 "Hook run in Agent summary minor modes."
112 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
113 (when (featurep 'xemacs)
114 (add-hook 'gnus-agent-server-mode-hook 'gnus-xmas-agent-server-menu-add))
116 (defcustom gnus-agent-confirmation-function 'y-or-n-p
117 "Function to confirm when error happens."
122 (defcustom gnus-agent-large-newsgroup nil
123 "*The number of articles which indicates a large newsgroup.
124 If the number of unread articles exceeds it, The number of articles to be
125 fetched will be limited to it. If not a positive integer, never consider it."
127 :type '(choice (const nil)
128 (integer :tag "Number")))
130 (defcustom gnus-agent-synchronize-flags 'ask
131 "Indicate if flags are synchronized when you plug in.
132 If this is `ask' the hook will query the user."
134 :type '(choice (const :tag "Always" t)
135 (const :tag "Never" nil)
136 (const :tag "Ask" ask))
139 (defcustom gnus-agent-go-online 'ask
140 "Indicate if offline servers go online when you plug in.
141 If this is `ask' the hook will query the user."
143 :type '(choice (const :tag "Always" t)
144 (const :tag "Never" nil)
145 (const :tag "Ask" ask))
148 (defcustom gnus-agent-mark-unread-after-downloaded t
149 "Indicate whether to mark articles unread after downloaded."
154 (defcustom gnus-agent-download-marks '(download)
155 "Marks for downloading."
157 :type '(repeat (symbol :tag "Mark"))
160 (defcustom gnus-agent-consider-all-articles nil
161 "If non-nil, consider also the read articles for downloading."
166 (defcustom gnus-agent-max-fetch-size 10000000 ;; 10 Mb
167 "Chunk size for `gnus-agent-fetch-session'.
168 The function will split its article fetches into chunks smaller than
173 (defcustom gnus-agent-enable-expiration 'ENABLE
174 "The default expiration state for each group.
175 When set to ENABLE, the default, `gnus-agent-expire' will expire old
176 contents from a group's local storage. This value may be overridden
177 to disable expiration in specific categories, topics, and groups. Of
178 course, you could change gnus-agent-enable-expiration to DISABLE then
179 enable expiration per categories, topics, and groups."
181 :type '(radio (const :format "Enable " ENABLE)
182 (const :format "Disable " DISABLE)))
184 (defcustom gnus-agent-expire-unagentized-dirs t
185 "Have gnus-agent-expire scan the directories under
186 \(gnus-agent-directory) for groups that are no longer agentized. When
187 found, offer to remove them.")
189 ;;; Internal variables
191 (defvar gnus-agent-history-buffers nil)
192 (defvar gnus-agent-buffer-alist nil)
193 (defvar gnus-agent-article-alist nil
194 "An assoc list identifying the articles whose headers have been fetched.
195 If successfully fetched, these headers will be stored in the group's overview
196 file. The key of each assoc pair is the article ID, the value of each assoc
197 pair is a flag indicating whether the identified article has been downloaded
198 \(gnus-agent-fetch-articles sets the value to the day of the download).
200 1) The last element of this list can not be expired as some
201 routines (for example, get-agent-fetch-headers) use the last
202 value to track which articles have had their headers retrieved.
203 2) The function `gnus-agent-regenerate' may destructively modify the value.")
204 (defvar gnus-agent-group-alist nil)
205 (defvar gnus-category-alist nil)
206 (defvar gnus-agent-current-history nil)
207 (defvar gnus-agent-overview-buffer nil)
208 (defvar gnus-category-predicate-cache nil)
209 (defvar gnus-category-group-cache nil)
210 (defvar gnus-agent-spam-hashtb nil)
211 (defvar gnus-agent-file-name nil)
212 (defvar gnus-agent-send-mail-function nil)
213 (defvar gnus-agent-file-coding-system 'raw-text)
214 (defvar gnus-agent-file-loading-cache nil)
215 (defvar gnus-agent-file-header-cache nil)
217 (defvar gnus-agent-auto-agentize-methods '(nntp nnimap)
218 "Initially, all servers from these methods are agentized.
219 The user may remove or add servers using the Server buffer. See Info
220 node `(gnus)Server Buffer'.")
223 (defvar gnus-headers)
230 (defun gnus-open-agent ()
232 (gnus-agent-read-servers)
234 (gnus-agent-create-buffer)
235 (add-hook 'gnus-group-mode-hook 'gnus-agent-mode)
236 (add-hook 'gnus-summary-mode-hook 'gnus-agent-mode)
237 (add-hook 'gnus-server-mode-hook 'gnus-agent-mode))
239 (defun gnus-agent-create-buffer ()
240 (if (gnus-buffer-live-p gnus-agent-overview-buffer)
242 (setq gnus-agent-overview-buffer
243 (gnus-get-buffer-create " *Gnus agent overview*"))
244 (with-current-buffer gnus-agent-overview-buffer
245 (set-buffer-multibyte t))
248 (gnus-add-shutdown 'gnus-close-agent 'gnus)
250 (defun gnus-close-agent ()
251 (setq gnus-category-predicate-cache nil
252 gnus-category-group-cache nil
253 gnus-agent-spam-hashtb nil)
254 (gnus-kill-buffer gnus-agent-overview-buffer))
257 ;;; Utility functions
260 (defun gnus-agent-read-file (file)
261 "Load FILE and do a `read' there."
264 (nnheader-insert-file-contents file)
265 (goto-char (point-min))
266 (read (current-buffer)))))
268 (defsubst gnus-agent-method ()
269 (concat (symbol-name (car gnus-command-method)) "/"
270 (if (equal (cadr gnus-command-method) "")
272 (cadr gnus-command-method))))
274 (defsubst gnus-agent-directory ()
275 "The name of the Gnus agent directory."
276 (nnheader-concat gnus-agent-directory
277 (nnheader-translate-file-chars (gnus-agent-method)) "/"))
279 (defun gnus-agent-lib-file (file)
280 "The full name of the Gnus agent library FILE."
281 (expand-file-name file
282 (file-name-as-directory
283 (expand-file-name "agent.lib" (gnus-agent-directory)))))
285 (defun gnus-agent-cat-set-property (category property value)
287 (setcdr (or (assq property category)
288 (let ((cell (cons property nil)))
289 (setcdr category (cons cell (cdr category)))
291 (let ((category category))
292 (while (cond ((eq property (caadr category))
293 (setcdr category (cddr category))
296 (setq category (cdr category)))))))
300 (defmacro gnus-agent-cat-defaccessor (name prop-name)
301 "Define accessor and setter methods for manipulating a list of the form
302 \(NAME (PROPERTY1 VALUE1) ... (PROPERTY_N VALUE_N)).
303 Given the call (gnus-agent-cat-defaccessor func PROPERTY1), the list may be
304 manipulated as follows:
305 (func LIST): Returns VALUE1
306 (setf (func LIST) NEW_VALUE1): Replaces VALUE1 with NEW_VALUE1."
307 `(progn (defmacro ,name (category)
308 (list (quote cdr) (list (quote assq)
309 (quote (quote ,prop-name)) category)))
311 (define-setf-method ,name (category)
312 (let* ((--category--temp-- (make-symbol "--category--"))
313 (--value--temp-- (make-symbol "--value--")))
314 (list (list --category--temp--) ; temporary-variables
315 (list category) ; value-forms
316 (list --value--temp--) ; store-variables
317 (let* ((category --category--temp--) ; store-form
318 (value --value--temp--))
319 (list (quote gnus-agent-cat-set-property)
321 (quote (quote ,prop-name))
323 (list (quote ,name) --category--temp--) ; access-form
327 (defmacro gnus-agent-cat-name (category)
330 (gnus-agent-cat-defaccessor
331 gnus-agent-cat-days-until-old agent-days-until-old)
332 (gnus-agent-cat-defaccessor
333 gnus-agent-cat-enable-expiration agent-enable-expiration)
334 (gnus-agent-cat-defaccessor
335 gnus-agent-cat-groups agent-groups)
336 (gnus-agent-cat-defaccessor
337 gnus-agent-cat-high-score agent-high-score)
338 (gnus-agent-cat-defaccessor
339 gnus-agent-cat-length-when-long agent-length-when-long)
340 (gnus-agent-cat-defaccessor
341 gnus-agent-cat-length-when-short agent-length-when-short)
342 (gnus-agent-cat-defaccessor
343 gnus-agent-cat-low-score agent-low-score)
344 (gnus-agent-cat-defaccessor
345 gnus-agent-cat-predicate agent-predicate)
346 (gnus-agent-cat-defaccessor
347 gnus-agent-cat-score-file agent-score-file)
348 (gnus-agent-cat-defaccessor
349 gnus-agent-cat-disable-undownloaded-faces agent-disable-undownloaded-faces)
352 (defsetf gnus-agent-cat-groups (category) (groups)
353 (list 'gnus-agent-set-cat-groups category groups)))
355 (defun gnus-agent-set-cat-groups (category groups)
356 (unless (eq groups 'ignore)
358 (old-g (gnus-agent-cat-groups category)))
359 (cond ((eq new-g old-g)
360 ;; gnus-agent-add-group is fiddling with the group
361 ;; list. Still, Im done.
364 ((eq new-g (cdr old-g))
365 ;; gnus-agent-add-group is fiddling with the group list
366 (setcdr (or (assq 'agent-groups category)
367 (let ((cell (cons 'agent-groups nil)))
368 (setcdr category (cons cell (cdr category)))
371 (let ((groups groups))
373 (let* ((group (pop groups))
374 (old-category (gnus-group-category group)))
375 (if (eq category old-category)
377 (setf (gnus-agent-cat-groups old-category)
378 (delete group (gnus-agent-cat-groups
380 ;; Purge cache as preceeding loop invalidated it.
381 (setq gnus-category-group-cache nil))
383 (setcdr (or (assq 'agent-groups category)
384 (let ((cell (cons 'agent-groups nil)))
385 (setcdr category (cons cell (cdr category)))
388 (defsubst gnus-agent-cat-make (name &optional default-agent-predicate)
389 (list name `(agent-predicate . ,(or default-agent-predicate 'false))))
391 ;;; Fetching setup functions.
393 (defun gnus-agent-start-fetch ()
394 "Initialize data structures for efficient fetching."
395 (gnus-agent-create-buffer))
397 (defun gnus-agent-stop-fetch ()
398 "Save all data structures and clean up."
399 (setq gnus-agent-spam-hashtb nil)
401 (set-buffer nntp-server-buffer)
404 (defmacro gnus-agent-with-fetch (&rest forms)
407 (let ((gnus-agent-fetching t))
408 (gnus-agent-start-fetch)
410 (gnus-agent-stop-fetch)))
412 (put 'gnus-agent-with-fetch 'lisp-indent-function 0)
413 (put 'gnus-agent-with-fetch 'edebug-form-spec '(body))
415 (defmacro gnus-agent-append-to-list (tail value)
416 `(setq ,tail (setcdr ,tail (cons ,value nil))))
418 (defmacro gnus-agent-message (level &rest args)
419 `(if (<= ,level gnus-verbose)
426 (defvar gnus-agent-mode-hook nil
427 "Hook run when installing agent mode.")
429 (defvar gnus-agent-mode nil)
430 (defvar gnus-agent-mode-status '(gnus-agent-mode " Plugged"))
432 (defun gnus-agent-mode ()
433 "Minor mode for providing a agent support in Gnus buffers."
434 (let* ((buffer (progn (string-match "^gnus-\\(.*\\)-mode$"
435 (symbol-name major-mode))
436 (match-string 1 (symbol-name major-mode))))
437 (mode (intern (format "gnus-agent-%s-mode" buffer))))
438 (set (make-local-variable 'gnus-agent-mode) t)
440 (set (make-local-variable mode) t)
442 (when (gnus-visual-p 'agent-menu 'menu)
443 (funcall (intern (format "gnus-agent-%s-make-menu-bar" buffer))))
444 (unless (assq 'gnus-agent-mode minor-mode-alist)
445 (push gnus-agent-mode-status minor-mode-alist))
446 (unless (assq mode minor-mode-map-alist)
447 (push (cons mode (symbol-value (intern (format "gnus-agent-%s-mode-map"
449 minor-mode-map-alist))
450 (when (eq major-mode 'gnus-group-mode)
451 (let ((init-plugged gnus-plugged)
452 (gnus-agent-go-online nil))
453 ;; g-a-t-p does nothing when gnus-plugged isn't changed.
454 ;; Therefore, make certain that the current value does not
455 ;; match the desired initial value.
456 (setq gnus-plugged :unknown)
457 (gnus-agent-toggle-plugged init-plugged)))
458 (gnus-run-hooks 'gnus-agent-mode-hook
459 (intern (format "gnus-agent-%s-mode-hook" buffer)))))
461 (defvar gnus-agent-group-mode-map (make-sparse-keymap))
462 (gnus-define-keys gnus-agent-group-mode-map
463 "Ju" gnus-agent-fetch-groups
464 "Jc" gnus-enter-category-buffer
465 "Jj" gnus-agent-toggle-plugged
466 "Js" gnus-agent-fetch-session
467 "JY" gnus-agent-synchronize-flags
468 "JS" gnus-group-send-queue
469 "Ja" gnus-agent-add-group
470 "Jr" gnus-agent-remove-group
471 "Jo" gnus-agent-toggle-group-plugged)
473 (defun gnus-agent-group-make-menu-bar ()
474 (unless (boundp 'gnus-agent-group-menu)
476 gnus-agent-group-menu gnus-agent-group-mode-map ""
478 ["Toggle plugged" gnus-agent-toggle-plugged t]
479 ["Toggle group plugged" gnus-agent-toggle-group-plugged t]
480 ["List categories" gnus-enter-category-buffer t]
481 ["Add (current) group to category" gnus-agent-add-group t]
482 ["Remove (current) group from category" gnus-agent-remove-group t]
483 ["Send queue" gnus-group-send-queue gnus-plugged]
485 ["All" gnus-agent-fetch-session gnus-plugged]
486 ["Group" gnus-agent-fetch-group gnus-plugged])
487 ["Synchronize flags" gnus-agent-synchronize-flags t]
490 (defvar gnus-agent-summary-mode-map (make-sparse-keymap))
491 (gnus-define-keys gnus-agent-summary-mode-map
492 "Jj" gnus-agent-toggle-plugged
493 "Ju" gnus-agent-summary-fetch-group
494 "JS" gnus-agent-fetch-group
495 "Js" gnus-agent-summary-fetch-series
496 "J#" gnus-agent-mark-article
497 "J\M-#" gnus-agent-unmark-article
498 "@" gnus-agent-toggle-mark
499 "Jc" gnus-agent-catchup)
501 (defun gnus-agent-summary-make-menu-bar ()
502 (unless (boundp 'gnus-agent-summary-menu)
504 gnus-agent-summary-menu gnus-agent-summary-mode-map ""
506 ["Toggle plugged" gnus-agent-toggle-plugged t]
507 ["Mark as downloadable" gnus-agent-mark-article t]
508 ["Unmark as downloadable" gnus-agent-unmark-article t]
509 ["Toggle mark" gnus-agent-toggle-mark t]
510 ["Fetch downloadable" gnus-agent-summary-fetch-group t]
511 ["Catchup undownloaded" gnus-agent-catchup t]))))
513 (defvar gnus-agent-server-mode-map (make-sparse-keymap))
514 (gnus-define-keys gnus-agent-server-mode-map
515 "Jj" gnus-agent-toggle-plugged
516 "Ja" gnus-agent-add-server
517 "Jr" gnus-agent-remove-server)
519 (defun gnus-agent-server-make-menu-bar ()
520 (unless (boundp 'gnus-agent-server-menu)
522 gnus-agent-server-menu gnus-agent-server-mode-map ""
524 ["Toggle plugged" gnus-agent-toggle-plugged t]
525 ["Add" gnus-agent-add-server t]
526 ["Remove" gnus-agent-remove-server t]))))
528 (defun gnus-agent-make-mode-line-string (string mouse-button mouse-func)
529 (if (and (fboundp 'propertize)
530 (fboundp 'make-mode-line-mouse-map))
531 (propertize string 'local-map
532 (make-mode-line-mouse-map mouse-button mouse-func))
535 (defun gnus-agent-toggle-plugged (set-to)
536 "Toggle whether Gnus is unplugged or not."
537 (interactive (list (not gnus-plugged)))
538 (cond ((eq set-to gnus-plugged)
541 (setq gnus-plugged set-to)
542 (gnus-run-hooks 'gnus-agent-plugged-hook)
543 (setcar (cdr gnus-agent-mode-status)
544 (gnus-agent-make-mode-line-string " Plugged"
546 'gnus-agent-toggle-plugged))
547 (gnus-agent-go-online gnus-agent-go-online)
548 (gnus-agent-possibly-synchronize-flags))
550 (gnus-agent-close-connections)
551 (setq gnus-plugged set-to)
552 (gnus-run-hooks 'gnus-agent-unplugged-hook)
553 (setcar (cdr gnus-agent-mode-status)
554 (gnus-agent-make-mode-line-string " Unplugged"
556 'gnus-agent-toggle-plugged))))
557 (force-mode-line-update)
558 (set-buffer-modified-p t))
560 (defmacro gnus-agent-while-plugged (&rest body)
561 `(let ((original-gnus-plugged gnus-plugged))
563 (progn (gnus-agent-toggle-plugged t)
565 (gnus-agent-toggle-plugged original-gnus-plugged))))
567 (put 'gnus-agent-while-plugged 'lisp-indent-function 0)
568 (put 'gnus-agent-while-plugged 'edebug-form-spec '(body))
570 (defun gnus-agent-close-connections ()
571 "Close all methods covered by the Gnus agent."
572 (let ((methods gnus-agent-covered-methods))
574 (gnus-close-server (pop methods)))))
577 (defun gnus-unplugged ()
578 "Start Gnus unplugged."
580 (setq gnus-plugged nil)
584 (defun gnus-plugged ()
585 "Start Gnus plugged."
587 (setq gnus-plugged t)
591 (defun gnus-slave-unplugged (&optional arg)
592 "Read news as a slave unplugged."
594 (setq gnus-plugged nil)
595 (gnus arg nil 'slave))
598 (defun gnus-agentize ()
599 "Allow Gnus to be an offline newsreader.
601 The gnus-agentize function is now called internally by gnus when
602 gnus-agent is set. If you wish to avoid calling gnus-agentize,
603 customize gnus-agent to nil.
605 This will modify the `gnus-setup-news-hook', and
606 `message-send-mail-real-function' variables, and install the Gnus agent
607 minor mode in all Gnus buffers."
610 (add-hook 'gnus-setup-news-hook 'gnus-agent-queue-setup)
611 (unless gnus-agent-send-mail-function
612 (setq gnus-agent-send-mail-function
613 (or message-send-mail-real-function
614 message-send-mail-function)
615 message-send-mail-real-function 'gnus-agent-send-mail))
617 (unless gnus-agent-covered-methods
620 (if (memq (car (gnus-server-to-method server))
621 gnus-agent-auto-agentize-methods)
622 (setq gnus-agent-covered-methods
623 (cons (gnus-server-to-method server)
624 gnus-agent-covered-methods ))))
625 (append (list gnus-select-method) gnus-secondary-select-methods))))
627 (defun gnus-agent-queue-setup (&optional group-name)
628 "Make sure the queue group exists.
629 Optional arg GROUP-NAME allows to specify another group."
630 (unless (gnus-gethash (format "nndraft:%s" (or group-name "queue"))
632 (gnus-request-create-group (or group-name "queue") '(nndraft ""))
633 (let ((gnus-level-default-subscribed 1))
634 (gnus-subscribe-group (format "nndraft:%s" (or group-name "queue"))
636 (gnus-group-set-parameter
637 (format "nndraft:%s" (or group-name "queue"))
638 'gnus-dummy '((gnus-draft-mode)))))
640 (defun gnus-agent-send-mail ()
642 (funcall gnus-agent-send-mail-function)
643 (goto-char (point-min))
645 (concat "^" (regexp-quote mail-header-separator) "\n"))
647 (gnus-agent-insert-meta-information 'mail)
648 (gnus-request-accept-article "nndraft:queue" nil t t)))
650 (defun gnus-agent-insert-meta-information (type &optional method)
651 "Insert meta-information into the message that says how it's to be posted.
652 TYPE can be either `mail' or `news'. If the latter, then METHOD can
655 (message-remove-header gnus-agent-meta-information-header)
656 (goto-char (point-min))
657 (insert gnus-agent-meta-information-header ": "
658 (symbol-name type) " " (format "%S" method)
661 (while (search-backward "\n" nil t)
662 (replace-match "\\n" t t))))
664 (defun gnus-agent-restore-gcc ()
665 "Restore GCC field from saved header."
667 (goto-char (point-min))
668 (while (re-search-forward (concat gnus-agent-gcc-header ":") nil t)
669 (replace-match "Gcc:" 'fixedcase))))
671 (defun gnus-agent-any-covered-gcc ()
673 (message-narrow-to-headers)
674 (let* ((gcc (mail-fetch-field "gcc" nil t))
676 (mapcar 'gnus-inews-group-method
677 (message-unquote-tokens
678 (message-tokenize-header
681 (while (and (not covered) methods)
682 (setq covered (gnus-agent-method-p (car methods))
683 methods (cdr methods)))
687 (defun gnus-agent-possibly-save-gcc ()
688 "Save GCC if Gnus is unplugged."
689 (when (and (not gnus-plugged) (gnus-agent-any-covered-gcc))
691 (goto-char (point-min))
692 (let ((case-fold-search t))
693 (while (re-search-forward "^gcc:" nil t)
694 (replace-match (concat gnus-agent-gcc-header ":") 'fixedcase))))))
696 (defun gnus-agent-possibly-do-gcc ()
697 "Do GCC if Gnus is plugged."
698 (when (or gnus-plugged (not (gnus-agent-any-covered-gcc)))
699 (gnus-inews-do-gcc)))
702 ;;; Group mode commands
705 (defun gnus-agent-fetch-groups (n)
706 "Put all new articles in the current groups into the Agent."
709 (error "Groups can't be fetched when Gnus is unplugged"))
710 (gnus-group-iterate n 'gnus-agent-fetch-group))
712 (defun gnus-agent-fetch-group (&optional group)
713 "Put all new articles in GROUP into the Agent."
714 (interactive (list (gnus-group-group-name)))
715 (setq group (or group gnus-newsgroup-name))
717 (error "No group on the current line"))
719 (gnus-agent-while-plugged
720 (let ((gnus-command-method (gnus-find-method-for-group group)))
721 (gnus-agent-with-fetch
722 (gnus-agent-fetch-group-1 group gnus-command-method)
723 (gnus-message 5 "Fetching %s...done" group)))))
725 (defun gnus-agent-add-group (category arg)
726 "Add the current group to an agent category."
732 (mapcar (lambda (cat) (list (symbol-name (car cat))))
736 (let ((cat (assq category gnus-category-alist))
738 (gnus-group-iterate arg
740 (when (gnus-agent-cat-groups (setq c (gnus-group-category group)))
741 (setf (gnus-agent-cat-groups c)
742 (delete group (gnus-agent-cat-groups c))))
743 (push group groups)))
744 (setf (gnus-agent-cat-groups cat)
745 (nconc (gnus-agent-cat-groups cat) groups))
746 (gnus-category-write)))
748 (defun gnus-agent-remove-group (arg)
749 "Remove the current group from its agent category, if any."
752 (gnus-group-iterate arg
754 (when (gnus-agent-cat-groups (setq c (gnus-group-category group)))
755 (setf (gnus-agent-cat-groups c)
756 (delete group (gnus-agent-cat-groups c))))))
757 (gnus-category-write)))
759 (defun gnus-agent-synchronize-flags ()
760 "Synchronize unplugged flags with servers."
763 (dolist (gnus-command-method gnus-agent-covered-methods)
764 (when (file-exists-p (gnus-agent-lib-file "flags"))
765 (gnus-agent-synchronize-flags-server gnus-command-method)))))
767 (defun gnus-agent-possibly-synchronize-flags ()
768 "Synchronize flags according to `gnus-agent-synchronize-flags'."
771 (dolist (gnus-command-method gnus-agent-covered-methods)
772 (when (file-exists-p (gnus-agent-lib-file "flags"))
773 (gnus-agent-possibly-synchronize-flags-server gnus-command-method)))))
775 (defun gnus-agent-synchronize-flags-server (method)
776 "Synchronize flags set when unplugged for server."
777 (let ((gnus-command-method method))
778 (when (file-exists-p (gnus-agent-lib-file "flags"))
779 (set-buffer (get-buffer-create " *Gnus Agent flag synchronize*"))
781 (nnheader-insert-file-contents (gnus-agent-lib-file "flags"))
782 (if (null (gnus-check-server gnus-command-method))
783 (gnus-message 1 "Couldn't open server %s" (nth 1 gnus-command-method))
785 (if (null (eval (read (current-buffer))))
787 (write-file (gnus-agent-lib-file "flags"))
788 (error "Couldn't set flags from file %s"
789 (gnus-agent-lib-file "flags"))))
790 (delete-file (gnus-agent-lib-file "flags")))
793 (defun gnus-agent-possibly-synchronize-flags-server (method)
794 "Synchronize flags for server according to `gnus-agent-synchronize-flags'."
795 (when (or (and gnus-agent-synchronize-flags
796 (not (eq gnus-agent-synchronize-flags 'ask)))
797 (and (eq gnus-agent-synchronize-flags 'ask)
798 (gnus-y-or-n-p (format "Synchronize flags on server `%s'? "
800 (gnus-agent-synchronize-flags-server method)))
803 ;;; Server mode commands
806 (defun gnus-agent-add-server (server)
807 "Enroll SERVER in the agent program."
808 (interactive (list (gnus-server-server-name)))
810 (error "No server on the current line"))
811 (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
812 (when (gnus-agent-method-p method)
813 (error "Server already in the agent program"))
814 (push method gnus-agent-covered-methods)
815 (gnus-server-update-server server)
816 (gnus-agent-write-servers)
817 (gnus-message 1 "Entered %s into the Agent" server)))
819 (defun gnus-agent-remove-server (server)
820 "Remove SERVER from the agent program."
821 (interactive (list (gnus-server-server-name)))
823 (error "No server on the current line"))
824 (let ((method (gnus-server-get-method nil (gnus-server-server-name))))
825 (unless (gnus-agent-method-p method)
826 (error "Server not in the agent program"))
827 (setq gnus-agent-covered-methods
828 (delete method gnus-agent-covered-methods))
829 (gnus-server-update-server server)
830 (gnus-agent-write-servers)
831 (gnus-message 1 "Removed %s from the agent" server)))
833 (defun gnus-agent-read-servers ()
834 "Read the alist of covered servers."
836 (let ((method (gnus-server-get-method
840 (unless (member method gnus-agent-covered-methods)
841 (push method gnus-agent-covered-methods))
842 (gnus-message 1 "Ignoring disappeared server `%s'" m))))
843 (gnus-agent-read-file
844 (nnheader-concat gnus-agent-directory "lib/servers"))))
846 (defun gnus-agent-write-servers ()
847 "Write the alist of covered servers."
848 (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
849 (let ((coding-system-for-write nnheader-file-coding-system)
850 (output-coding-system nnheader-file-coding-system)
851 (file-name-coding-system nnmail-pathname-coding-system)
852 (pathname-coding-system nnmail-pathname-coding-system))
853 (with-temp-file (nnheader-concat gnus-agent-directory "lib/servers")
854 (prin1 (mapcar 'gnus-method-simplify gnus-agent-covered-methods)
861 (defun gnus-agent-mark-article (n &optional unmark)
862 "Mark the next N articles as downloadable.
863 If N is negative, mark backward instead. If UNMARK is non-nil, remove
864 the mark instead. The difference between N and the actual number of
865 articles marked is returned."
867 (let ((backward (< n 0))
872 (gnus-summary-set-agent-mark
873 (gnus-summary-article-number) unmark)
874 (zerop (gnus-summary-next-subject (if backward -1 1) nil t))))
877 (gnus-message 7 "No more articles"))
878 (gnus-summary-recenter)
879 (gnus-summary-position-point)
882 (defun gnus-agent-unmark-article (n)
883 "Remove the downloadable mark from the next N articles.
884 If N is negative, unmark backward instead. The difference between N and
885 the actual number of articles unmarked is returned."
887 (gnus-agent-mark-article n t))
889 (defun gnus-agent-toggle-mark (n)
890 "Toggle the downloadable mark from the next N articles.
891 If N is negative, toggle backward instead. The difference between N and
892 the actual number of articles toggled is returned."
894 (gnus-agent-mark-article n 'toggle))
896 (defun gnus-summary-set-agent-mark (article &optional unmark)
897 "Mark ARTICLE as downloadable. If UNMARK is nil, article is marked.
898 When UNMARK is t, the article is unmarked. For any other value, the
899 article's mark is toggled."
900 (let ((unmark (cond ((eq nil unmark)
905 (memq article gnus-newsgroup-downloadable)))))
906 (when (gnus-summary-goto-subject article nil t)
907 (gnus-summary-update-mark
910 (setq gnus-newsgroup-downloadable
911 (delq article gnus-newsgroup-downloadable))
912 (gnus-article-mark article))
914 (setq gnus-newsgroup-downloadable
915 (gnus-add-to-sorted-list gnus-newsgroup-downloadable article))
916 gnus-downloadable-mark)
920 (defun gnus-agent-get-undownloaded-list ()
921 "Construct list of articles that have not been downloaded."
922 (let ((gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name)))
923 (when (set (make-local-variable 'gnus-newsgroup-agentized)
924 (gnus-agent-method-p gnus-command-method))
925 (let* ((alist (gnus-agent-load-alist gnus-newsgroup-name))
926 (headers (sort (mapcar (lambda (h)
927 (mail-header-number h))
928 gnus-newsgroup-headers) '<))
929 (cached (and gnus-use-cache gnus-newsgroup-cached))
930 (undownloaded (list nil))
931 (tail-undownloaded undownloaded)
932 (unfetched (list nil))
933 (tail-unfetched unfetched))
934 (while (and alist headers)
935 (let ((a (caar alist))
938 ;; Ignore IDs in the alist that are not being
939 ;; displayed in the summary.
940 (setq alist (cdr alist)))
942 ;; Headers that are not in the alist should be
943 ;; fictious (see nnagent-retrieve-headers); they
944 ;; imply that this article isn't in the agent.
945 (gnus-agent-append-to-list tail-undownloaded h)
946 (gnus-agent-append-to-list tail-unfetched h)
947 (setq headers (cdr headers)))
949 (setq alist (cdr alist))
950 (setq headers (cdr headers))
951 nil ; ignore already downloaded
954 (setq alist (cdr alist))
955 (setq headers (cdr headers))
957 ;; This article isn't in the agent. Check to see
958 ;; if it is in the cache. If it is, it's been
960 (while (and cached (< (car cached) a))
961 (setq cached (cdr cached)))
962 (unless (equal a (car cached))
963 (gnus-agent-append-to-list tail-undownloaded a))))))
966 (let ((num (pop headers)))
967 (gnus-agent-append-to-list tail-undownloaded num)
968 (gnus-agent-append-to-list tail-unfetched num)))
970 (setq gnus-newsgroup-undownloaded (cdr undownloaded)
971 gnus-newsgroup-unfetched (cdr unfetched))))))
973 (defun gnus-agent-catchup ()
974 "Mark as read all unhandled articles.
975 An article is unhandled if it is neither cached, nor downloaded, nor
979 (let ((articles gnus-newsgroup-undownloaded))
980 (when (or gnus-newsgroup-downloadable
981 gnus-newsgroup-cached)
982 (setq articles (gnus-sorted-ndifference
983 (gnus-sorted-ndifference
984 (gnus-copy-sequence articles)
985 gnus-newsgroup-downloadable)
986 gnus-newsgroup-cached)))
989 (gnus-summary-mark-article
990 (pop articles) gnus-catchup-mark)))
991 (gnus-summary-position-point)))
993 (defun gnus-agent-summary-fetch-series ()
995 (when gnus-newsgroup-processable
996 (setq gnus-newsgroup-downloadable
997 (let* ((dl gnus-newsgroup-downloadable)
998 (gnus-newsgroup-downloadable
999 (sort (gnus-copy-sequence gnus-newsgroup-processable) '<))
1000 (fetched-articles (gnus-agent-summary-fetch-group)))
1001 ;; The preceeding call to (gnus-agent-summary-fetch-group)
1002 ;; updated gnus-newsgroup-downloadable to remove each
1003 ;; article successfully fetched.
1005 ;; For each article that I processed, remove its
1006 ;; processable mark IF the article is no longer
1007 ;; downloadable (i.e. it's already downloaded)
1008 (dolist (article gnus-newsgroup-processable)
1009 (unless (memq article gnus-newsgroup-downloadable)
1010 (gnus-summary-remove-process-mark article)))
1011 (gnus-sorted-ndifference dl fetched-articles)))))
1013 (defun gnus-agent-summary-fetch-group (&optional all)
1014 "Fetch the downloadable articles in the group.
1015 Optional arg ALL, if non-nil, means to fetch all articles."
1018 (if all gnus-newsgroup-articles
1019 gnus-newsgroup-downloadable))
1020 (gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name))
1022 (gnus-agent-while-plugged
1024 (error "No articles to download"))
1025 (gnus-agent-with-fetch
1026 (setq gnus-newsgroup-undownloaded
1027 (gnus-sorted-ndifference
1028 gnus-newsgroup-undownloaded
1029 (setq fetched-articles
1030 (gnus-agent-fetch-articles
1031 gnus-newsgroup-name articles)))))
1033 (dolist (article articles)
1034 (let ((was-marked-downloadable
1035 (memq article gnus-newsgroup-downloadable)))
1036 (cond (gnus-agent-mark-unread-after-downloaded
1037 (setq gnus-newsgroup-downloadable
1038 (delq article gnus-newsgroup-downloadable))
1040 ;; The downloadable mark is implemented as a
1041 ;; type of read mark. Therefore, marking the
1042 ;; article as unread is sufficient to clear
1043 ;; its downloadable flag.
1044 (gnus-summary-mark-article article gnus-unread-mark))
1045 (was-marked-downloadable
1046 (gnus-summary-set-agent-mark article t)))
1047 (when (gnus-summary-goto-subject article nil t)
1048 (gnus-summary-update-download-mark article))))))
1051 (defun gnus-agent-fetch-selected-article ()
1052 "Fetch the current article as it is selected.
1053 This can be added to `gnus-select-article-hook' or
1054 `gnus-mark-article-hook'."
1055 (let ((gnus-command-method gnus-current-select-method))
1056 (when (and gnus-plugged (gnus-agent-method-p gnus-command-method))
1057 (when (gnus-agent-fetch-articles
1059 (list gnus-current-article))
1060 (setq gnus-newsgroup-undownloaded
1061 (delq gnus-current-article gnus-newsgroup-undownloaded))
1062 (gnus-summary-update-download-mark gnus-current-article)))))
1065 ;;; Internal functions
1069 ;;; The agent's active range is defined as follows:
1070 ;;; If the agent has no record of the group, use the actual active
1072 ;;; If the agent has a record, set the agent's active range to
1073 ;;; include the max limit of the actual active range.
1074 ;;; When expiring, update the min limit to match the smallest of the
1075 ;;; min article not expired or the min actual active range.
1077 (defun gnus-agent-save-active (method)
1078 (gnus-agent-save-active-1 method 'gnus-active-to-gnus-format))
1080 (defun gnus-agent-save-active-1 (method function)
1081 (when (gnus-agent-method-p method)
1082 (let* ((gnus-command-method method)
1083 (new (gnus-make-hashtable (count-lines (point-min) (point-max))))
1084 (file (gnus-agent-lib-file "active")))
1085 (funcall function nil new)
1086 (gnus-agent-write-active file new)
1088 (nnheader-insert-file-contents file))))
1090 (defun gnus-agent-write-active (file new &optional literal-replacement)
1092 (when (and (not literal-replacement)
1093 (file-exists-p file))
1094 (setq old (gnus-make-hashtable (count-lines (point-min) (point-max))))
1096 (nnheader-insert-file-contents file)
1097 (gnus-active-to-gnus-format nil old))
1098 ;; Iterate over the current active groups, the current active
1099 ;; range may expand, but NOT CONTRACT, the agent's active range.
1102 (let ((new-active (and nsym (boundp nsym) (symbol-value nsym))))
1104 (let* ((osym (intern (symbol-name nsym) old))
1105 (old-active (and (boundp osym) (symbol-value osym))))
1107 (let ((new-min (car new-active))
1108 (old-min (car old-active))
1109 (new-max (cdr new-active))
1110 (old-max (cdr old-active)))
1111 (if (and (integerp new-min)
1112 (< new-min old-min))
1113 (setcar old-active new-min))
1114 (if (and (integerp new-max)
1115 (> new-max old-max))
1116 (setcdr old-active new-max)))
1117 (set osym new-active))))))
1119 (gnus-make-directory (file-name-directory file))
1120 (let ((nnmail-active-file-coding-system gnus-agent-file-coding-system))
1121 ;; The hashtable contains real names of groups. However, do NOT
1122 ;; add the foreign server prefix as gnus-active-to-gnus-format
1123 ;; will add it while reading the file.
1124 (gnus-write-active-file file old nil))))
1126 (defun gnus-agent-save-groups (method)
1127 (gnus-agent-save-active-1 method 'gnus-groups-to-gnus-format))
1129 (defun gnus-agent-save-group-info (method group active)
1130 (when (gnus-agent-method-p method)
1131 (let* ((gnus-command-method method)
1132 (coding-system-for-write nnheader-file-coding-system)
1133 (output-coding-system nnheader-file-coding-system)
1134 (file-name-coding-system nnmail-pathname-coding-system)
1135 (pathname-coding-system nnmail-pathname-coding-system)
1136 (file (gnus-agent-lib-file "active"))
1137 oactive-min oactive-max)
1138 (gnus-make-directory (file-name-directory file))
1139 (with-temp-file file
1140 ;; Emacs got problem to match non-ASCII group in multibyte buffer.
1141 (set-buffer-multibyte nil)
1142 (when (file-exists-p file)
1143 (nnheader-insert-file-contents file)
1145 (goto-char (point-min))
1146 (when (re-search-forward
1147 (concat "^" (regexp-quote group) " ") nil t)
1149 (setq oactive-max (read (current-buffer)) ;; max
1150 oactive-min (read (current-buffer)))) ;; min
1151 (gnus-delete-line)))
1152 (insert (format "%S %d %d y\n" (intern group)
1153 (max (or oactive-max (cdr active)) (cdr active))
1154 (min (or oactive-min (car active)) (car active))))
1155 (goto-char (point-max))
1156 (while (search-backward "\\." nil t)
1157 (delete-char 1))))))
1159 (defun gnus-agent-group-path (group)
1160 "Translate GROUP into a file name."
1162 ;; NOTE: This is what nnmail-group-pathname does as of Apr 2003.
1163 ;; The two methods must be kept synchronized, which is why
1164 ;; gnus-agent-group-pathname was added.
1167 (nnheader-translate-file-chars
1168 (nnheader-replace-duplicate-chars-in-string
1169 (nnheader-replace-chars-in-string
1170 (gnus-group-real-name group)
1173 (if (or nnmail-use-long-file-names
1174 (file-directory-p (expand-file-name group (gnus-agent-directory))))
1176 (mm-encode-coding-string
1177 (nnheader-replace-chars-in-string group ?. ?/)
1178 nnmail-pathname-coding-system)))
1180 (defun gnus-agent-group-pathname (group)
1181 "Translate GROUP into a file name."
1182 ;; nnagent uses nnmail-group-pathname to read articles while
1183 ;; unplugged. The agent must, therefore, use the same directory
1185 (let ((gnus-command-method (or gnus-command-method
1186 (gnus-find-method-for-group group))))
1187 (nnmail-group-pathname (gnus-group-real-name group) (gnus-agent-directory))))
1189 (defun gnus-agent-get-function (method)
1190 (if (gnus-online method)
1195 ;;; History functions
1197 (defun gnus-agent-history-buffer ()
1198 (cdr (assoc (gnus-agent-method) gnus-agent-history-buffers)))
1200 (defun gnus-agent-open-history ()
1202 (push (cons (gnus-agent-method)
1203 (set-buffer (gnus-get-buffer-create
1204 (format " *Gnus agent %s history*"
1205 (gnus-agent-method)))))
1206 gnus-agent-history-buffers)
1207 (set-buffer-multibyte nil) ;; everything is binary
1210 (let ((file (gnus-agent-lib-file "history")))
1211 (when (file-exists-p file)
1212 (nnheader-insert-file-contents file))
1213 (set (make-local-variable 'gnus-agent-file-name) file))))
1215 (defun gnus-agent-close-history ()
1216 (when (gnus-buffer-live-p gnus-agent-current-history)
1217 (kill-buffer gnus-agent-current-history)
1218 (setq gnus-agent-history-buffers
1219 (delq (assoc (gnus-agent-method) gnus-agent-history-buffers)
1220 gnus-agent-history-buffers))))
1226 (defun gnus-agent-fetch-articles (group articles)
1227 "Fetch ARTICLES from GROUP and put them into the Agent."
1229 (gnus-agent-load-alist group)
1230 (let* ((alist gnus-agent-article-alist)
1231 (headers (if (< (length articles) 2) nil gnus-newsgroup-headers))
1232 (selected-sets (list nil))
1233 (current-set-size 0)
1236 ;; Check each article
1237 (while (setq article (pop articles))
1238 ;; Skip alist entries preceeding this article
1239 (while (> article (or (caar alist) (1+ article)))
1240 (setq alist (cdr alist)))
1242 ;; Prune off articles that we have already fetched.
1243 (unless (and (eq article (caar alist))
1245 ;; Skip headers preceeding this article
1248 (let* ((header (car headers)))
1250 (mail-header-number header)
1252 (setq headers (cdr headers)))
1254 ;; Add this article to the current set
1255 (setcar selected-sets (cons article (car selected-sets)))
1257 ;; Update the set size, when the set is too large start a
1258 ;; new one. I do this after adding the article as I want at
1259 ;; least one article in each set.
1260 (when (< gnus-agent-max-fetch-size
1261 (setq current-set-size
1263 (if (= header-number article)
1264 (let ((char-size (mail-header-chars
1266 (if (<= char-size 0)
1267 ;; The char size was missing/invalid,
1268 ;; assume a worst-case situation of
1269 ;; 65 char/line. If the line count
1270 ;; is missing, arbitrarily assume a
1271 ;; size of 1000 characters.
1272 (max (* 65 (mail-header-lines
1277 (setcar selected-sets (nreverse (car selected-sets)))
1278 (setq selected-sets (cons nil selected-sets)
1279 current-set-size 0))))
1281 (when (or (cdr selected-sets) (car selected-sets))
1282 (let* ((fetched-articles (list nil))
1283 (tail-fetched-articles fetched-articles)
1284 (dir (gnus-agent-group-pathname group))
1285 (date (time-to-days (current-time)))
1286 (case-fold-search t)
1289 (setcar selected-sets (nreverse (car selected-sets)))
1290 (setq selected-sets (nreverse selected-sets))
1292 (gnus-make-directory dir)
1293 (gnus-message 7 "Fetching articles for %s..." group)
1296 (while (setq articles (pop selected-sets))
1297 ;; Fetch the articles from the backend.
1298 (if (gnus-check-backend-function 'retrieve-articles group)
1299 (setq pos (gnus-retrieve-articles articles group))
1302 (while (setq article (pop articles))
1303 (gnus-message 10 "Fetching article %s for %s..."
1306 (gnus-backlog-request-article group article
1308 (gnus-request-article article group))
1309 (goto-char (point-max))
1310 (push (cons article (point)) pos)
1311 (insert-buffer-substring nntp-server-buffer)))
1313 nntp-server-buffer (point-min) (point-max))
1314 (setq pos (nreverse pos)))))
1315 ;; Then save these articles into the Agent.
1317 (set-buffer nntp-server-buffer)
1319 (narrow-to-region (cdar pos) (or (cdadr pos) (point-max)))
1320 (goto-char (point-min))
1321 (unless (eobp) ;; Don't save empty articles.
1322 (when (search-forward "\n\n" nil t)
1323 (when (search-backward "\nXrefs: " nil t)
1324 ;; Handle cross posting.
1325 (goto-char (match-end 0)) ; move to end of header name
1326 (skip-chars-forward "^ ") ; skip server name
1327 (skip-chars-forward " ")
1329 (while (looking-at "\\([^: \n]+\\):\\([0-9]+\\) *")
1330 (push (cons (buffer-substring (match-beginning 1)
1333 (buffer-substring (match-beginning 2)
1336 (goto-char (match-end 0)))
1337 (gnus-agent-crosspost crosses (caar pos) date)))
1338 (goto-char (point-min))
1339 (if (not (re-search-forward
1340 "^Message-ID: *<\\([^>\n]+\\)>" nil t))
1341 (setq id "No-Message-ID-in-article")
1342 (setq id (buffer-substring
1343 (match-beginning 1) (match-end 1))))
1344 (write-region-as-coding-system
1345 gnus-agent-file-coding-system (point-min) (point-max)
1346 (concat dir (number-to-string (caar pos))) nil 'silent)
1348 (gnus-agent-append-to-list
1349 tail-fetched-articles (caar pos)))
1351 (setq pos (cdr pos)))))
1353 (gnus-agent-save-alist group (cdr fetched-articles) date)
1354 (gnus-message 7 ""))
1355 (cdr fetched-articles))))))
1357 (defun gnus-agent-crosspost (crosses article &optional date)
1358 (setq date (or date t))
1360 (let (gnus-agent-article-alist group alist beg end)
1362 (set-buffer gnus-agent-overview-buffer)
1363 (when (nnheader-find-nov-line article)
1366 (setq end (progn (forward-line 1) (point)))))
1368 (setq group (caar crosses))
1369 (unless (setq alist (assoc group gnus-agent-group-alist))
1370 (push (setq alist (list group (gnus-agent-load-alist (caar crosses))))
1371 gnus-agent-group-alist))
1372 (setcdr alist (cons (cons (cdar crosses) date) (cdr alist)))
1374 (set-buffer (gnus-get-buffer-create (format " *Gnus agent overview %s*"
1376 (when (= (point-max) (point-min))
1377 (push (cons group (current-buffer)) gnus-agent-buffer-alist)
1379 (nnheader-insert-file-contents
1380 (gnus-agent-article-name ".overview" group))))
1381 (nnheader-find-nov-line (string-to-number (cdar crosses)))
1382 (insert (string-to-number (cdar crosses)))
1383 (insert-buffer-substring gnus-agent-overview-buffer beg end)
1384 (gnus-agent-check-overview-buffer))
1385 (setq crosses (cdr crosses)))))
1387 (defun gnus-agent-backup-overview-buffer ()
1388 (when gnus-newsgroup-name
1389 (let ((root (gnus-agent-article-name ".overview" gnus-newsgroup-name))
1392 (while (file-exists-p
1393 (setq name (concat root "~"
1394 (int-to-string (setq cnt (1+ cnt))) "~"))))
1395 (write-region (point-min) (point-max) name nil 'no-msg)
1396 (gnus-message 1 "Created backup copy of overview in %s." name)))
1399 (defun gnus-agent-check-overview-buffer (&optional buffer)
1400 "Check the overview file given for sanity.
1401 In particular, checks that the file is sorted by article number
1402 and that there are no duplicates."
1407 (set-buffer buffer))
1410 (goto-char (point-min))
1412 (while (< (point) (point-max))
1414 (cur (condition-case nil
1415 (read (current-buffer))
1418 ((or (not (integerp cur))
1419 (not (eq (char-after) ?\t)))
1421 (setq backed-up (gnus-agent-backup-overview-buffer)))
1423 "Overview buffer contains garbage '%s'."
1425 p (gnus-point-at-eol))))
1428 (setq backed-up (gnus-agent-backup-overview-buffer)))
1430 "Duplicate overview line for %d" cur)
1431 (delete-region (point) (progn (forward-line 1) (point))))
1434 (setq backed-up (gnus-agent-backup-overview-buffer)))
1435 (gnus-message 1 "Overview buffer not sorted!")
1436 (sort-numeric-fields 1 (point-min) (point-max))
1437 (goto-char (point-min))
1440 (setq prev-num cur)))
1441 (forward-line 1)))))))
1443 (defun gnus-agent-flush-cache ()
1445 (while gnus-agent-buffer-alist
1446 (set-buffer (cdar gnus-agent-buffer-alist))
1447 (write-region-as-coding-system
1448 gnus-agent-file-coding-system
1449 (point-min) (point-max)
1450 (gnus-agent-article-name ".overview"
1451 (caar gnus-agent-buffer-alist))
1453 (setq gnus-agent-buffer-alist (cdr gnus-agent-buffer-alist)))
1454 (while gnus-agent-group-alist
1455 (with-temp-file (gnus-agent-article-name
1456 ".agentview" (caar gnus-agent-group-alist))
1457 (princ (cdar gnus-agent-group-alist))
1459 (princ 1 (current-buffer))
1461 (setq gnus-agent-group-alist (cdr gnus-agent-group-alist)))))
1463 (defun gnus-agent-find-parameter (group symbol)
1464 "Search for GROUPs SYMBOL in the group's parameters, the group's
1465 topic parameters, the group's category, or the customizable
1466 variables. Returns the first non-nil value found."
1467 (or (gnus-group-find-parameter group symbol t)
1468 (gnus-group-parameter-value (cdr (gnus-group-category group)) symbol t)
1472 '((agent-short-article . gnus-agent-short-article)
1473 (agent-long-article . gnus-agent-long-article)
1474 (agent-low-score . gnus-agent-low-score)
1475 (agent-high-score . gnus-agent-high-score)
1476 (agent-days-until-old . gnus-agent-expire-days)
1477 (agent-enable-expiration
1478 . gnus-agent-enable-expiration)
1479 (agent-predicate . gnus-agent-predicate)))))))
1481 (defun gnus-agent-fetch-headers (group &optional force)
1482 "Fetch interesting headers into the agent. The group's overview
1483 file will be updated to include the headers while a list of available
1484 article numbers will be returned."
1485 (let* ((fetch-all (and gnus-agent-consider-all-articles
1486 ;; Do not fetch all headers if the predicate
1487 ;; implies that we only consider unread articles.
1488 (not (gnus-predicate-implies-unread
1489 (gnus-agent-find-parameter group
1490 'agent-predicate)))))
1491 (articles (if fetch-all
1492 (gnus-uncompress-range (gnus-active group))
1493 (gnus-list-of-unread-articles group)))
1494 (gnus-decode-encoded-word-function 'identity)
1495 (file (gnus-agent-article-name ".overview" group)))
1496 ;; Check whether the number of articles is not too large.
1497 (when (and (integerp gnus-agent-large-newsgroup)
1498 (> gnus-agent-large-newsgroup 0))
1499 (setq articles (nthcdr (max (- (length articles)
1500 gnus-agent-large-newsgroup)
1504 ;; Add articles with marks to the list of article headers we want to
1505 ;; fetch. Don't fetch articles solely on the basis of a recent or seen
1506 ;; mark, but do fetch recent or seen articles if they have other, more
1507 ;; interesting marks. (We have to fetch articles with boring marks
1508 ;; because otherwise the agent will remove their marks.)
1509 (dolist (arts (gnus-info-marks (gnus-get-info group)))
1510 (unless (memq (car arts) '(seen recent killed cache))
1511 (setq articles (gnus-range-add articles (cdr arts)))))
1512 (setq articles (sort (gnus-uncompress-sequence articles) '<)))
1514 ;; At this point, I have the list of articles to consider for
1515 ;; fetching. This is the list that I'll return to my caller. Some
1516 ;; of these articles may have already been fetched. That's OK as
1517 ;; the fetch article code will filter those out. Internally, I'll
1518 ;; filter this list to just those articles whose headers need to
1520 (let ((articles articles))
1521 ;; Remove known articles.
1522 (when (and (or gnus-agent-cache
1524 (gnus-agent-load-alist group))
1525 ;; Remove articles marked as downloaded.
1527 ;; I want to fetch all headers in the active range.
1528 ;; Therefore, exclude only those headers that are in the
1530 ;; NOTE: This is probably NOT what I want to do after
1531 ;; agent expiration in this group.
1532 (setq articles (gnus-agent-uncached-articles articles group))
1534 ;; I want to only fetch those headers that have never been
1535 ;; fetched. Therefore, exclude all headers that are, or
1536 ;; WERE, in the article alist.
1537 (let ((low (1+ (caar (last gnus-agent-article-alist))))
1538 (high (cdr (gnus-active group))))
1539 ;; Low can be greater than High when the same group is
1540 ;; fetched twice in the same session {The first fetch will
1541 ;; fill the article alist such that (last
1542 ;; gnus-agent-article-alist) equals (cdr (gnus-active
1543 ;; group))}. The addition of one(the 1+ above) then
1544 ;; forces Low to be greater than High. When this happens,
1545 ;; gnus-list-range-intersection returns nil which
1546 ;; indicates that no headers need to be fetched. -- Kevin
1547 (setq articles (gnus-list-range-intersection
1548 articles (list (cons low high)))))))
1551 10 "gnus-agent-fetch-headers: undownloaded articles are '%s'"
1552 (gnus-compress-sequence articles t))
1555 (set-buffer nntp-server-buffer)
1559 (gnus-message 7 "Fetching headers for %s..." group)
1562 (gnus-make-directory (nnheader-translate-file-chars
1563 (file-name-directory file) t))
1565 (unless (eq 'nov (gnus-retrieve-headers articles group))
1566 (nnvirtual-convert-headers))
1567 (gnus-agent-check-overview-buffer)
1568 ;; Move these headers to the overview buffer so that
1569 ;; gnus-agent-braid-nov can merge them with the contents
1572 gnus-agent-overview-buffer (point-min) (point-max))
1573 (when (file-exists-p file)
1574 (gnus-agent-braid-nov group articles file))
1575 (gnus-agent-check-overview-buffer)
1576 (write-region-as-coding-system
1577 gnus-agent-file-coding-system
1578 (point-min) (point-max) file nil 'silent)
1579 (gnus-agent-save-alist group articles nil)
1583 (nnheader-insert-file-contents file)))))
1586 (defsubst gnus-agent-copy-nov-line (article)
1588 (set-buffer gnus-agent-overview-buffer)
1589 (while (and (not (eobp))
1590 (< (setq art (read (current-buffer))) article))
1594 (not (eq article art)))
1595 (set-buffer nntp-server-buffer)
1597 (setq e (progn (forward-line 1) (point)))
1598 (set-buffer nntp-server-buffer)
1599 (insert-buffer-substring gnus-agent-overview-buffer b e))))
1601 (defun gnus-agent-braid-nov (group articles file)
1602 "Merge agent overview data with given file.
1603 Takes headers for ARTICLES from `gnus-agent-overview-buffer' and the given
1604 FILE and places the combined headers into `nntp-server-buffer'."
1606 (set-buffer gnus-agent-overview-buffer)
1607 (goto-char (point-min))
1608 (set-buffer nntp-server-buffer)
1610 (nnheader-insert-file-contents file)
1611 (goto-char (point-max))
1613 (unless (looking-at "[0-9]+\t")
1614 ;; Remove corrupted lines
1616 1 "Overview %s is corrupted. Removing corrupted lines..." file)
1617 (goto-char (point-min))
1619 (if (looking-at "[0-9]+\t")
1621 (delete-region (point) (progn (forward-line 1) (point)))))
1623 (unless (or (= (point-min) (point-max))
1624 (< (setq last (read (current-buffer))) (car articles)))
1625 ;; We do it the hard way.
1626 (when (nnheader-find-nov-line (car articles))
1627 ;; Replacing existing NOV entry
1628 (delete-region (point) (progn (forward-line 1) (point))))
1629 (gnus-agent-copy-nov-line (pop articles))
1633 (while (let ((art (read (current-buffer))))
1634 (cond ((< art (car articles))
1637 ((= art (car articles))
1640 (point) (progn (forward-line 1) (point)))
1646 (gnus-agent-copy-nov-line (pop articles)))))
1648 ;; Copy the rest lines
1649 (set-buffer nntp-server-buffer)
1650 (goto-char (point-max))
1653 (set-buffer gnus-agent-overview-buffer)
1655 (while (<= (read (current-buffer)) last)
1658 (setq start (point))
1659 (set-buffer nntp-server-buffer))
1660 (insert-buffer-substring gnus-agent-overview-buffer start))))
1662 ;; Keeps the compiler from warning about the free variable in
1663 ;; gnus-agent-read-agentview.
1665 (defvar gnus-agent-read-agentview))
1667 (defun gnus-agent-load-alist (group)
1668 "Load the article-state alist for GROUP."
1669 ;; Bind free variable that's used in `gnus-agent-read-agentview'.
1670 (let ((gnus-agent-read-agentview group))
1671 (setq gnus-agent-article-alist
1672 (gnus-cache-file-contents
1673 (gnus-agent-article-name ".agentview" group)
1674 'gnus-agent-file-loading-cache
1675 'gnus-agent-read-agentview))))
1677 ;; Save format may be either 1 or 2. Two is the new, compressed
1678 ;; format that is still being tested. Format 1 is uncompressed but
1679 ;; known to be reliable.
1680 (defconst gnus-agent-article-alist-save-format 2)
1682 (defun gnus-agent-read-agentview (file)
1683 "Load FILE and do a `read' there."
1686 (nnheader-insert-file-contents file)
1687 (goto-char (point-min))
1688 (let ((alist (read (current-buffer)))
1689 (version (condition-case nil (read (current-buffer))
1695 (let ((inhibit-quit t)
1697 (gnus-agent-open-history)
1698 (set-buffer (gnus-agent-history-buffer))
1699 (goto-char (point-min))
1701 (if (and (looking-at
1702 "[^\t\n]+\t\\([0-9]+\\)\t\\([^ \n]+\\) \\([0-9]+\\)")
1703 (string= (match-string 2)
1704 gnus-agent-read-agentview)
1705 (setq entry (assoc (string-to-number (match-string 3)) alist)))
1706 (setcdr entry (string-to-number (match-string 1))))
1708 (gnus-agent-close-history)
1709 (setq changed-version t)))
1711 (setq changed-version (not (= 1 gnus-agent-article-alist-save-format))))
1716 (let ((state (car comp-list))
1717 (sequence (gnus-uncompress-sequence
1719 (mapcar (lambda (article-id)
1720 (setq uncomp (cons (cons article-id state) uncomp)))
1723 (setq alist (sort uncomp
1724 (lambda (first second)
1725 (< (car first) (car second))))))))
1726 (when changed-version
1727 (let ((gnus-agent-article-alist alist))
1728 (gnus-agent-save-alist gnus-agent-read-agentview)))
1731 (defun gnus-agent-save-alist (group &optional articles state dir)
1732 "Save the article-state alist for GROUP."
1733 (let* ((file-name-coding-system nnmail-pathname-coding-system)
1734 (pathname-coding-system nnmail-pathname-coding-system)
1735 (prev (cons nil gnus-agent-article-alist))
1737 print-level print-length item article)
1738 (while (setq article (pop articles))
1739 (while (and (cdr prev)
1740 (< (caadr prev) article))
1741 (setq prev (cdr prev)))
1744 (setcdr prev (list (cons article state))))
1745 ((> (caadr prev) article)
1746 (setcdr prev (cons (cons article state) (cdr prev))))
1747 ((= (caadr prev) article)
1748 (setcdr (cadr prev) state)))
1749 (setq prev (cdr prev)))
1750 (setq gnus-agent-article-alist (cdr all))
1752 (gnus-make-directory dir)
1753 (gnus-make-directory (gnus-agent-article-name "" group)))
1754 (with-temp-file (if dir
1755 (expand-file-name ".agentview" dir)
1756 (gnus-agent-article-name ".agentview" group))
1757 (cond ((eq gnus-agent-article-alist-save-format 1)
1758 (princ gnus-agent-article-alist (current-buffer)))
1759 ((eq gnus-agent-article-alist-save-format 2)
1760 (let ((compressed nil))
1761 (mapcar (lambda (pair)
1762 (let* ((article-id (car pair))
1763 (day-of-download (cdr pair))
1764 (comp-list (assq day-of-download compressed)))
1767 (cons article-id (cdr comp-list)))
1769 (cons (list day-of-download article-id)
1771 nil)) gnus-agent-article-alist)
1772 (mapcar (lambda (comp-list)
1774 (gnus-compress-sequence
1775 (nreverse (cdr comp-list)))))
1777 (princ compressed (current-buffer)))))
1779 (princ gnus-agent-article-alist-save-format (current-buffer))
1782 (defun gnus-agent-article-name (article group)
1783 (expand-file-name article
1784 (file-name-as-directory
1785 (gnus-agent-group-pathname group))))
1787 (defun gnus-agent-batch-confirmation (msg)
1788 "Show error message and return t."
1789 (gnus-message 1 msg)
1793 (defun gnus-agent-batch-fetch ()
1794 "Start Gnus and fetch session."
1797 (let ((gnus-agent-confirmation-function 'gnus-agent-batch-confirmation))
1798 (gnus-agent-fetch-session))
1801 (defun gnus-agent-fetch-session ()
1802 "Fetch all articles and headers that are eligible for fetching."
1804 (unless gnus-agent-covered-methods
1805 (error "No servers are covered by the Gnus agent"))
1806 (unless gnus-plugged
1807 (error "Can't fetch articles while Gnus is unplugged"))
1808 (let ((methods gnus-agent-covered-methods)
1809 groups group gnus-command-method)
1812 (setq gnus-command-method (car methods))
1813 (when (and (or (gnus-server-opened gnus-command-method)
1814 (gnus-open-server gnus-command-method))
1815 (gnus-online gnus-command-method))
1816 (setq groups (gnus-groups-from-server (car methods)))
1817 (gnus-agent-with-fetch
1818 (while (setq group (pop groups))
1819 (when (<= (gnus-group-level group)
1820 gnus-agent-handle-level)
1821 (if (or debug-on-error debug-on-quit)
1822 (gnus-agent-fetch-group-1
1823 group gnus-command-method)
1825 (gnus-agent-fetch-group-1
1826 group gnus-command-method)
1828 (unless (funcall gnus-agent-confirmation-function
1829 (format "Error %s. Continue? "
1830 (error-message-string err)))
1831 (error "Cannot fetch articles into the Gnus agent")))
1833 (unless (funcall gnus-agent-confirmation-function
1835 "Quit fetching session %s. Continue? "
1836 (error-message-string err)))
1838 "Cannot fetch articles into the Gnus agent")))))))))
1839 (setq methods (cdr methods)))
1840 (gnus-run-hooks 'gnus-agent-fetched-hook)
1841 (gnus-message 6 "Finished fetching articles into the Gnus agent"))))
1843 (defun gnus-agent-fetch-group-1 (group method)
1845 (let ((gnus-command-method method)
1846 (gnus-newsgroup-name group)
1847 (gnus-newsgroup-dependencies gnus-newsgroup-dependencies)
1848 (gnus-newsgroup-headers gnus-newsgroup-headers)
1849 (gnus-newsgroup-scored gnus-newsgroup-scored)
1850 (gnus-use-cache gnus-use-cache)
1851 (gnus-summary-expunge-below gnus-summary-expunge-below)
1852 (gnus-summary-mark-below gnus-summary-mark-below)
1853 (gnus-orphan-score gnus-orphan-score)
1854 ;; Maybe some other gnus-summary local variables should also
1860 category predicate info marks score-param
1862 (unless (gnus-check-group group)
1863 (error "Can't open server for %s" group))
1866 (when (or gnus-newsgroup-active
1868 (gnus-activate-group group))
1869 (let ((marked-articles gnus-newsgroup-downloadable))
1870 ;; Identify the articles marked for download
1871 (unless gnus-newsgroup-active
1872 ;; The variable gnus-newsgroup-active was selected as I need
1873 ;; a gnus-summary local variable that is NOT bound to any
1874 ;; value (its global value should default to nil).
1875 (dolist (mark gnus-agent-download-marks)
1876 (let ((arts (cdr (assq mark (gnus-info-marks
1877 (setq info (gnus-get-info group)))))))
1879 (setq marked-articles (nconc (gnus-uncompress-range arts)
1882 (setq marked-articles (sort marked-articles '<))
1884 ;; Fetch any new articles from the server
1885 (setq articles (gnus-agent-fetch-headers group))
1887 ;; Merge new articles with marked
1888 (setq articles (sort (append marked-articles articles) '<))
1891 ;; Parse them and see which articles we want to fetch.
1892 (setq gnus-newsgroup-dependencies
1893 (or gnus-newsgroup-dependencies
1894 (make-vector (length articles) 0)))
1895 (setq gnus-newsgroup-headers
1896 (or gnus-newsgroup-headers
1897 (gnus-get-newsgroup-headers-xover articles nil nil
1899 ;; `gnus-agent-overview-buffer' may be killed for
1900 ;; timeout reason. If so, recreate it.
1901 (gnus-agent-create-buffer)
1903 ;; Figure out how to select articles in this group
1904 (setq category (gnus-group-category group))
1908 (gnus-agent-find-parameter group 'agent-predicate)))
1910 ;; If the selection predicate requires scoring, score each header
1911 (unless (memq predicate '(gnus-agent-true gnus-agent-false))
1913 (gnus-agent-find-parameter group 'agent-score-file)))
1914 ;; Translate score-param into real one
1917 ((eq score-param 'file)
1918 (setq score-param (gnus-all-score-files group)))
1919 ((stringp (car score-param)))
1921 (setq score-param (list (list score-param)))))
1923 (gnus-score-headers score-param))))
1925 (unless (and (eq predicate 'gnus-agent-false)
1926 (not marked-articles))
1927 (let ((arts (list nil)))
1928 (let ((arts-tail arts)
1929 (alist (gnus-agent-load-alist group))
1930 (marked-articles marked-articles)
1931 (gnus-newsgroup-headers gnus-newsgroup-headers))
1932 (while (setq gnus-headers (pop gnus-newsgroup-headers))
1933 (let ((num (mail-header-number gnus-headers)))
1934 ;; Determine if this article is already in the cache
1936 (> num (caar alist)))
1937 (setq alist (cdr alist)))
1939 (unless (and (eq num (caar alist))
1942 ;; Determine if this article was marked for download.
1943 (while (and marked-articles
1944 (> num (car marked-articles)))
1945 (setq marked-articles
1946 (cdr marked-articles)))
1948 ;; When this article is marked, or selected by the
1949 ;; predicate, add it to the download list
1950 (when (or (eq num (car marked-articles))
1953 (assq num gnus-newsgroup-scored))
1954 gnus-summary-default-score))
1955 (gnus-agent-long-article
1956 (gnus-agent-find-parameter
1957 group 'agent-long-article))
1958 (gnus-agent-short-article
1959 (gnus-agent-find-parameter
1960 group 'agent-short-article))
1961 (gnus-agent-low-score
1962 (gnus-agent-find-parameter
1963 group 'agent-low-score))
1964 (gnus-agent-high-score
1965 (gnus-agent-find-parameter
1966 group 'agent-high-score))
1967 (gnus-agent-expire-days
1968 (gnus-agent-find-parameter
1969 group 'agent-days-until-old)))
1970 (funcall predicate)))
1971 (gnus-agent-append-to-list arts-tail num))))))
1973 (let (fetched-articles)
1974 ;; Fetch all selected articles
1975 (setq gnus-newsgroup-undownloaded
1976 (gnus-sorted-ndifference
1977 gnus-newsgroup-undownloaded
1978 (setq fetched-articles
1980 (gnus-agent-fetch-articles group (cdr arts))
1983 (let ((unfetched-articles
1984 (gnus-sorted-ndifference (cdr arts) fetched-articles)))
1985 (if gnus-newsgroup-active
1986 ;; Update the summary buffer
1988 (dolist (article marked-articles)
1989 (gnus-summary-set-agent-mark article t))
1990 (dolist (article fetched-articles)
1991 (if gnus-agent-mark-unread-after-downloaded
1992 (gnus-summary-mark-article
1993 article gnus-unread-mark))
1994 (when (gnus-summary-goto-subject article nil t)
1995 (gnus-summary-update-download-mark article)))
1996 (dolist (article unfetched-articles)
1997 (gnus-summary-mark-article
1998 article gnus-canceled-mark)))
2000 ;; Update the group buffer.
2002 ;; When some, or all, of the marked articles came
2003 ;; from the download mark. Remove that mark. I
2004 ;; didn't do this earlier as I only want to remove
2005 ;; the marks after the fetch is completed.
2007 (dolist (mark gnus-agent-download-marks)
2008 (when (eq mark 'download)
2010 (assq mark (gnus-info-marks
2011 (setq info (gnus-get-info group))))))
2012 (when (cdr marked-arts)
2014 (delq marked-arts (gnus-info-marks info)))
2015 (gnus-info-set-marks info marks)))))
2016 (let ((read (gnus-info-read
2017 (or info (setq info (gnus-get-info group))))))
2019 info (gnus-add-to-range read unfetched-articles)))
2021 (gnus-group-update-group group t)
2025 (concat "(gnus-group-set-info '"
2026 (gnus-prin1-to-string info)
2030 ;;; Agent Category Mode
2033 (defvar gnus-category-mode-hook nil
2034 "Hook run in `gnus-category-mode' buffers.")
2036 (defvar gnus-category-line-format " %(%20c%): %g\n"
2037 "Format of category lines.
2039 Valid specifiers include:
2040 %c Topic name (string)
2041 %g The number of groups in the topic (integer)
2043 General format specifiers can also be used. See Info node
2044 `(gnus)Formatting Variables'.")
2046 (defvar gnus-category-mode-line-format "Gnus: %%b"
2047 "The format specification for the category mode line.")
2049 (defvar gnus-agent-predicate 'false
2050 "The selection predicate used when no other source is available.")
2052 (defvar gnus-agent-short-article 100
2053 "Articles that have fewer lines than this are short.")
2055 (defvar gnus-agent-long-article 200
2056 "Articles that have more lines than this are long.")
2058 (defvar gnus-agent-low-score 0
2059 "Articles that have a score lower than this have a low score.")
2061 (defvar gnus-agent-high-score 0
2062 "Articles that have a score higher than this have a high score.")
2065 ;;; Internal variables.
2067 (defvar gnus-category-buffer "*Agent Category*")
2069 (defvar gnus-category-line-format-alist
2070 `((?c gnus-tmp-name ?s)
2071 (?g gnus-tmp-groups ?d)))
2073 (defvar gnus-category-mode-line-format-alist
2074 `((?u user-defined ?s)))
2076 (defvar gnus-category-line-format-spec nil)
2077 (defvar gnus-category-mode-line-format-spec nil)
2079 (defvar gnus-category-mode-map nil)
2080 (put 'gnus-category-mode 'mode-class 'special)
2082 (unless gnus-category-mode-map
2083 (setq gnus-category-mode-map (make-sparse-keymap))
2084 (suppress-keymap gnus-category-mode-map)
2086 (gnus-define-keys gnus-category-mode-map
2087 "q" gnus-category-exit
2088 "k" gnus-category-kill
2089 "c" gnus-category-copy
2090 "a" gnus-category-add
2091 "e" gnus-agent-customize-category
2092 "p" gnus-category-edit-predicate
2093 "g" gnus-category-edit-groups
2094 "s" gnus-category-edit-score
2095 "l" gnus-category-list
2097 "\C-c\C-i" gnus-info-find-node
2098 "\C-c\C-b" gnus-bug))
2100 (defvar gnus-category-menu-hook nil
2101 "*Hook run after the creation of the menu.")
2103 (defun gnus-category-make-menu-bar ()
2104 (gnus-turn-off-edit-menu 'category)
2105 (unless (boundp 'gnus-category-menu)
2107 gnus-category-menu gnus-category-mode-map ""
2109 ["Add" gnus-category-add t]
2110 ["Kill" gnus-category-kill t]
2111 ["Copy" gnus-category-copy t]
2112 ["Edit category" gnus-agent-customize-category t]
2113 ["Edit predicate" gnus-category-edit-predicate t]
2114 ["Edit score" gnus-category-edit-score t]
2115 ["Edit groups" gnus-category-edit-groups t]
2116 ["Exit" gnus-category-exit t]))
2118 (gnus-run-hooks 'gnus-category-menu-hook)))
2120 (defun gnus-category-mode ()
2121 "Major mode for listing and editing agent categories.
2123 All normal editing commands are switched off.
2124 \\<gnus-category-mode-map>
2125 For more in-depth information on this mode, read the manual
2126 \(`\\[gnus-info-find-node]').
2128 The following commands are available:
2130 \\{gnus-category-mode-map}"
2132 (when (gnus-visual-p 'category-menu 'menu)
2133 (gnus-category-make-menu-bar))
2134 (kill-all-local-variables)
2135 (gnus-simplify-mode-line)
2136 (setq major-mode 'gnus-category-mode)
2137 (setq mode-name "Category")
2138 (gnus-set-default-directory)
2139 (setq mode-line-process nil)
2140 (use-local-map gnus-category-mode-map)
2141 (buffer-disable-undo)
2142 (setq truncate-lines t)
2143 (setq buffer-read-only t)
2144 (gnus-run-hooks 'gnus-category-mode-hook))
2146 (defalias 'gnus-category-position-point 'gnus-goto-colon)
2148 (defun gnus-category-insert-line (category)
2149 (let* ((gnus-tmp-name (format "%s" (car category)))
2150 (gnus-tmp-groups (length (gnus-agent-cat-groups category))))
2152 (gnus-add-text-properties
2156 (eval gnus-category-line-format-spec))
2157 (list 'gnus-category gnus-tmp-name))))
2159 (defun gnus-enter-category-buffer ()
2160 "Go to the Category buffer."
2162 (gnus-category-setup-buffer)
2163 (gnus-configure-windows 'category)
2164 (gnus-category-prepare))
2166 (defun gnus-category-setup-buffer ()
2167 (unless (get-buffer gnus-category-buffer)
2169 (set-buffer (gnus-get-buffer-create gnus-category-buffer))
2170 (gnus-category-mode))))
2172 (defun gnus-category-prepare ()
2173 (gnus-set-format 'category-mode)
2174 (gnus-set-format 'category t)
2175 (let ((alist gnus-category-alist)
2176 (buffer-read-only nil))
2179 (gnus-category-insert-line (pop alist)))
2180 (goto-char (point-min))
2181 (gnus-category-position-point)))
2183 (defun gnus-category-name ()
2184 (or (intern (get-text-property (gnus-point-at-bol) 'gnus-category))
2185 (error "No category on the current line")))
2187 (defun gnus-category-read ()
2188 "Read the category alist."
2189 (setq gnus-category-alist
2193 (nnheader-insert-file-contents (nnheader-concat gnus-agent-directory "lib/categories"))
2194 (goto-char (point-min))
2195 ;; This code isn't temp, it will be needed so long as
2196 ;; anyone may be migrating from an older version.
2198 ;; Once we're certain that people will not revert to an
2199 ;; earlier version, we can take out the old-list code in
2200 ;; gnus-category-write.
2201 (let* ((old-list (read (current-buffer)))
2202 (new-list (ignore-errors (read (current-buffer)))))
2205 ;; Convert from a positional list to an alist.
2215 '(agent-predicate agent-score-file agent-groups))))
2218 (list (gnus-agent-cat-make 'default 'short)))))
2220 (defun gnus-category-write ()
2221 "Write the category alist."
2222 (setq gnus-category-predicate-cache nil
2223 gnus-category-group-cache nil)
2224 (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
2225 (with-temp-file (nnheader-concat gnus-agent-directory "lib/categories")
2226 ;; This prin1 is temporary. It exists so that people can revert
2227 ;; to an earlier version of gnus-agent.
2228 (prin1 (mapcar (lambda (c)
2230 (cdr (assoc 'agent-predicate c))
2231 (cdr (assoc 'agent-score-file c))
2232 (cdr (assoc 'agent-groups c))))
2233 gnus-category-alist)
2236 (prin1 gnus-category-alist (current-buffer))))
2238 (defun gnus-category-edit-predicate (category)
2239 "Edit the predicate for CATEGORY."
2240 (interactive (list (gnus-category-name)))
2241 (let ((info (assq category gnus-category-alist)))
2243 (gnus-agent-cat-predicate info)
2244 (format "Editing the select predicate for category %s" category)
2245 `(lambda (predicate)
2246 ;; Avoid run-time execution of setf form
2247 ;; (setf (gnus-agent-cat-predicate (assq ',category gnus-category-alist))
2249 ;; use its expansion instead:
2250 (gnus-agent-cat-set-property (assq ',category gnus-category-alist)
2251 'agent-predicate predicate)
2253 (gnus-category-write)
2254 (gnus-category-list)))))
2256 (defun gnus-category-edit-score (category)
2257 "Edit the score expression for CATEGORY."
2258 (interactive (list (gnus-category-name)))
2259 (let ((info (assq category gnus-category-alist)))
2261 (gnus-agent-cat-score-file info)
2262 (format "Editing the score expression for category %s" category)
2263 `(lambda (score-file)
2264 ;; Avoid run-time execution of setf form
2265 ;; (setf (gnus-agent-cat-score-file (assq ',category gnus-category-alist))
2267 ;; use its expansion instead:
2268 (gnus-agent-cat-set-property (assq ',category gnus-category-alist)
2269 'agent-score-file score-file)
2271 (gnus-category-write)
2272 (gnus-category-list)))))
2274 (defun gnus-category-edit-groups (category)
2275 "Edit the group list for CATEGORY."
2276 (interactive (list (gnus-category-name)))
2277 (let ((info (assq category gnus-category-alist)))
2279 (gnus-agent-cat-groups info)
2280 (format "Editing the group list for category %s" category)
2282 ;; Avoid run-time execution of setf form
2283 ;; (setf (gnus-agent-cat-groups (assq ',category gnus-category-alist))
2285 ;; use its expansion instead:
2286 (gnus-agent-set-cat-groups (assq ',category gnus-category-alist)
2289 (gnus-category-write)
2290 (gnus-category-list)))))
2292 (defun gnus-category-kill (category)
2293 "Kill the current category."
2294 (interactive (list (gnus-category-name)))
2295 (let ((info (assq category gnus-category-alist))
2296 (buffer-read-only nil))
2298 (setq gnus-category-alist (delq info gnus-category-alist))
2299 (gnus-category-write)))
2301 (defun gnus-category-copy (category to)
2302 "Copy the current category."
2303 (interactive (list (gnus-category-name) (intern (read-string "New name: "))))
2304 (let ((info (assq category gnus-category-alist)))
2305 (push (let ((newcat (gnus-copy-sequence info)))
2306 (setf (gnus-agent-cat-name newcat) to)
2307 (setf (gnus-agent-cat-groups newcat) nil)
2309 gnus-category-alist)
2310 (gnus-category-write)
2311 (gnus-category-list)))
2313 (defun gnus-category-add (category)
2314 "Create a new category."
2315 (interactive "SCategory name: ")
2316 (when (assq category gnus-category-alist)
2317 (error "Category %s already exists" category))
2318 (push (gnus-agent-cat-make category)
2319 gnus-category-alist)
2320 (gnus-category-write)
2321 (gnus-category-list))
2323 (defun gnus-category-list ()
2324 "List all categories."
2326 (gnus-category-prepare))
2328 (defun gnus-category-exit ()
2329 "Return to the group buffer."
2331 (kill-buffer (current-buffer))
2332 (gnus-configure-windows 'group t))
2334 ;; To avoid having 8-bit characters in the source file.
2335 (defvar gnus-category-not (list '! 'not (intern (format "%c" 172))))
2337 (defvar gnus-category-predicate-alist
2338 '((spam . gnus-agent-spam-p)
2339 (short . gnus-agent-short-p)
2340 (long . gnus-agent-long-p)
2341 (low . gnus-agent-low-scored-p)
2342 (high . gnus-agent-high-scored-p)
2343 (read . gnus-agent-read-p)
2344 (true . gnus-agent-true)
2345 (false . gnus-agent-false))
2346 "Mapping from short score predicate symbols to predicate functions.")
2348 (defun gnus-agent-spam-p ()
2349 "Say whether an article is spam or not."
2350 (unless gnus-agent-spam-hashtb
2351 (setq gnus-agent-spam-hashtb (gnus-make-hashtable 1000)))
2352 (if (not (equal (mail-header-references gnus-headers) ""))
2354 (let ((string (gnus-simplify-subject (mail-header-subject gnus-headers))))
2356 (gnus-gethash string gnus-agent-spam-hashtb)
2357 (gnus-sethash string t gnus-agent-spam-hashtb)))))
2359 (defun gnus-agent-short-p ()
2360 "Say whether an article is short or not."
2361 (< (mail-header-lines gnus-headers) gnus-agent-short-article))
2363 (defun gnus-agent-long-p ()
2364 "Say whether an article is long or not."
2365 (> (mail-header-lines gnus-headers) gnus-agent-long-article))
2367 (defun gnus-agent-low-scored-p ()
2368 "Say whether an article has a low score or not."
2369 (< gnus-score gnus-agent-low-score))
2371 (defun gnus-agent-high-scored-p ()
2372 "Say whether an article has a high score or not."
2373 (> gnus-score gnus-agent-high-score))
2375 (defun gnus-agent-read-p ()
2376 "Say whether an article is read or not."
2377 (gnus-member-of-range (mail-header-number gnus-headers)
2378 (gnus-info-read (gnus-get-info gnus-newsgroup-name))))
2380 (defun gnus-category-make-function (predicate)
2381 "Make a function from PREDICATE."
2382 (let ((func (gnus-category-make-function-1 predicate)))
2383 (if (and (= (length func) 1)
2384 (symbolp (car func)))
2386 (gnus-byte-compile `(lambda () ,func)))))
2388 (defun gnus-agent-true ()
2392 (defun gnus-agent-false ()
2396 (defun gnus-category-make-function-1 (predicate)
2397 "Make a function from PREDICATE."
2399 ;; Functions are just returned as is.
2400 ((or (symbolp predicate)
2401 (functionp predicate))
2402 `(,(or (cdr (assq predicate gnus-category-predicate-alist))
2404 ;; More complex predicate.
2407 ((memq (car predicate) '(& and))
2409 ((memq (car predicate) '(| or))
2411 ((memq (car predicate) gnus-category-not)
2413 ,@(mapcar 'gnus-category-make-function-1 (cdr predicate))))
2415 (error "Unknown predicate type: %s" predicate))))
2417 (defun gnus-get-predicate (predicate)
2418 "Return the function implementing PREDICATE."
2419 (or (cdr (assoc predicate gnus-category-predicate-cache))
2420 (let ((func (gnus-category-make-function predicate)))
2421 (setq gnus-category-predicate-cache
2422 (nconc gnus-category-predicate-cache
2423 (list (cons predicate func))))
2426 (defun gnus-predicate-implies-unread (predicate)
2427 "Say whether PREDICATE implies unread articles only.
2428 It is okay to miss some cases, but there must be no false positives.
2429 That is, if this function returns true, then indeed the predicate must
2430 return only unread articles."
2431 (gnus-function-implies-unread-1 (gnus-category-make-function predicate)))
2433 (defun gnus-function-implies-unread-1 (function)
2434 (cond ((eq function (symbol-function 'gnus-agent-read-p))
2438 ((functionp function)
2440 ((memq (car function) '(or and not))
2441 (apply (car function)
2442 (mapcar 'gnus-function-implies-unread-1 (cdr function))))
2444 (error "Unknown function: %s" function))))
2446 (defun gnus-group-category (group)
2447 "Return the category GROUP belongs to."
2448 (unless gnus-category-group-cache
2449 (setq gnus-category-group-cache (gnus-make-hashtable 1000))
2450 (let ((cs gnus-category-alist)
2452 (while (setq cat (pop cs))
2453 (setq groups (gnus-agent-cat-groups cat))
2455 (gnus-sethash (pop groups) cat gnus-category-group-cache)))))
2456 (or (gnus-gethash group gnus-category-group-cache)
2457 (assq 'default gnus-category-alist)))
2459 (defun gnus-agent-expire-group (group &optional articles force)
2460 "Expire all old articles in GROUP.
2461 If you want to force expiring of certain articles, this function can
2462 take ARTICLES, and FORCE parameters as well.
2464 The articles on which the expiration process runs are selected as follows:
2465 if ARTICLES is null, all read and unmarked articles.
2466 if ARTICLES is t, all articles.
2467 if ARTICLES is a list, just those articles.
2468 FORCE is equivalent to setting the expiration predicates to true."
2470 (list (let ((def (or (gnus-group-group-name)
2471 gnus-newsgroup-name)))
2472 (let ((select (read-string (if def
2473 (concat "Group Name ("
2476 (if (and (equal "" select)
2482 (gnus-agent-expire articles group force)
2483 (if (or (not (eq articles t))
2485 (concat "Are you sure that you want to "
2486 "expire all articles in " group ".")))
2487 (let ((gnus-command-method (gnus-find-method-for-group group))
2488 (overview (gnus-get-buffer-create " *expire overview*"))
2491 (let ((active-file (gnus-agent-lib-file "active")))
2492 (when (file-exists-p active-file)
2494 (nnheader-insert-file-contents active-file)
2495 (gnus-active-to-gnus-format
2497 (setq orig (gnus-make-hashtable
2498 (count-lines (point-min) (point-max))))))
2500 (gnus-agent-expire-group-1
2501 group overview (gnus-gethash-safe group orig)
2503 (gnus-agent-write-active active-file orig t)))
2504 (kill-buffer overview))))
2505 (gnus-message 4 "Expiry...done")))
2507 (defun gnus-agent-expire-group-1 (group overview active articles force)
2508 ;; Internal function - requires caller to have set
2509 ;; gnus-command-method, initialized overview buffer, and to have
2510 ;; provided a non-nil active
2512 (let ((dir (gnus-agent-group-pathname group)))
2513 (when (boundp 'gnus-agent-expire-current-dirs)
2514 (set 'gnus-agent-expire-current-dirs
2516 (symbol-value 'gnus-agent-expire-current-dirs))))
2518 (if (and (not force)
2519 (eq 'DISABLE (gnus-agent-find-parameter group
2520 'agent-enable-expiration)))
2521 (gnus-message 5 "Expiry skipping over %s" group)
2522 (gnus-message 5 "Expiring articles in %s" group)
2523 (gnus-agent-load-alist group)
2524 (let* ((info (gnus-get-info group))
2525 (alist gnus-agent-article-alist)
2526 (day (- (time-to-days (current-time))
2527 (gnus-agent-find-parameter group 'agent-days-until-old)))
2528 (specials (if (and alist
2530 ;; This could be a bit of a problem. I need to
2531 ;; keep the last article to avoid refetching
2532 ;; headers when using nntp in the backend. At
2533 ;; the same time, if someone uses a backend
2534 ;; that supports article moving then I may have
2535 ;; to remove the last article to complete the
2536 ;; move. Right now, I'm going to assume that
2537 ;; FORCE overrides specials.
2538 (list (caar (last alist)))))
2539 (unreads ;; Articles that are excluded from the
2540 ;; expiration process
2541 (cond (gnus-agent-expire-all
2542 ;; All articles are marked read by global decree
2545 ;; All articles are marked read by function
2549 ;; Unread articles are marked protected from
2550 ;; expiration Don't call
2551 ;; gnus-list-of-unread-articles as it returns
2552 ;; articles that have not been fetched into the
2555 (gnus-agent-unread-articles group)))
2557 ;; All articles EXCEPT those named by the caller
2558 ;; are protected from expiration
2559 (gnus-sorted-difference
2560 (gnus-uncompress-range
2562 (caar (last alist))))
2563 (sort articles '<)))))
2564 (marked ;; More articles that are exluded from the
2565 ;; expiration process
2566 (cond (gnus-agent-expire-all
2567 ;; All articles are unmarked by global decree
2570 ;; All articles are unmarked by function
2574 ;; All articles may as well be unmarked as the
2575 ;; unreads list already names the articles we are
2579 ;; Ticked and/or dormant articles are excluded
2582 (gnus-uncompress-range
2583 (cdr (assq 'tick (gnus-info-marks info))))
2584 (gnus-uncompress-range
2586 (gnus-info-marks info))))))))
2587 (nov-file (concat dir ".overview"))
2593 ;; The normal article alist contains elements that look like
2594 ;; (article# . fetch_date) I need to combine other
2595 ;; information with this list. For example, a flag indicating
2596 ;; that a particular article MUST BE KEPT. To do this, I'm
2597 ;; going to transform the elements to look like (article#
2598 ;; fetch_date keep_flag NOV_entry_marker) Later, I'll reverse
2599 ;; the process to generate the expired article alist.
2601 ;; Convert the alist elements to (article# fetch_date nil
2603 (setq dlist (mapcar (lambda (e)
2604 (list (car e) (cdr e) nil nil)) alist))
2606 ;; Convert the keep lists to elements that look like (article#
2607 ;; nil keep_flag nil) then append it to the expanded dlist
2608 ;; These statements are sorted by ascending precidence of the
2610 (setq dlist (nconc dlist
2612 (list e nil 'unread nil))
2614 (setq dlist (nconc dlist
2616 (list e nil 'marked nil))
2618 (setq dlist (nconc dlist
2620 (list e nil 'special nil))
2623 (set-buffer overview)
2625 (buffer-disable-undo)
2626 (when (file-exists-p nov-file)
2627 (gnus-message 7 "gnus-agent-expire: Loading overview...")
2628 (nnheader-insert-file-contents nov-file)
2629 (goto-char (point-min))
2632 (while (< (setq p (point)) (point-max))
2634 ;; If I successfully read an integer (the plus zero
2635 ;; ensures a numeric type), prepend a marker entry
2637 (push (list (+ 0 (read (current-buffer))) nil nil
2638 (set-marker (make-marker) p))
2641 (gnus-message 1 "gnus-agent-expire: read error \
2642 occurred when reading expression at %s in %s. Skipping to next \
2643 line." (point) nov-file)))
2644 ;; Whether I succeeded, or failed, it doesn't matter.
2645 ;; Move to the next line then try again.
2649 7 "gnus-agent-expire: Loading overview... Done"))
2650 (set-buffer-modified-p nil)
2652 ;; At this point, all of the information is in dlist. The
2653 ;; only problem is that much of it is spread across multiple
2654 ;; entries. Sort then MERGE!!
2655 (gnus-message 7 "gnus-agent-expire: Sorting entries... ")
2656 ;; If two entries have the same article-number then sort by
2657 ;; ascending keep_flag.
2664 (cond ((< (nth 0 a) (nth 0 b))
2666 ((> (nth 0 a) (nth 0 b))
2669 (let ((a (or (symbol-value (nth 2 a))
2671 (b (or (symbol-value (nth 2 b))
2674 (gnus-message 7 "gnus-agent-expire: Sorting entries... Done")
2675 (gnus-message 7 "gnus-agent-expire: Merging entries... ")
2676 (let ((dlist dlist))
2677 (while (cdr dlist) ; I'm not at the end-of-list
2678 (if (eq (caar dlist) (caadr dlist))
2679 (let ((first (cdr (car dlist)))
2680 (secnd (cdr (cadr dlist))))
2681 (setcar first (or (car first)
2682 (car secnd))) ; fetch_date
2683 (setq first (cdr first)
2685 (setcar first (or (car first)
2686 (car secnd))) ; Keep_flag
2687 (setq first (cdr first)
2689 (setcar first (or (car first)
2690 (car secnd))) ; NOV_entry_marker
2692 (setcdr dlist (cddr dlist)))
2693 (setq dlist (cdr dlist)))))
2694 (gnus-message 7 "gnus-agent-expire: Merging entries... Done")
2696 (let* ((len (float (length dlist)))
2700 (let ((new-completed (truncate (* 100.0
2701 (/ (setq cnt (1+ cnt))
2703 (when (> new-completed completed)
2704 (setq completed new-completed)
2705 (gnus-message 7 "%3d%% completed..." completed)))
2706 (let* ((entry (car dlist))
2707 (article-number (nth 0 entry))
2708 (fetch-date (nth 1 entry))
2709 (keep (nth 2 entry))
2710 (marker (nth 3 entry)))
2713 ;; Kept articles are unread, marked, or special.
2715 (gnus-agent-message 10
2716 "gnus-agent-expire: Article %d: Kept %s article."
2717 article-number keep)
2719 (unless (file-exists-p
2720 (concat dir (number-to-string
2722 (setf (nth 1 entry) nil)
2723 (gnus-agent-message 3 "gnus-agent-expire cleared \
2724 download flag on article %d as the cached article file is missing."
2727 (gnus-message 1 "gnus-agent-expire detected a \
2728 missing NOV entry. Run gnus-agent-regenerate-group to restore it.")))
2729 (gnus-agent-append-to-list
2731 (cons article-number fetch-date)))
2733 ;; The following articles are READ, UNMARKED, and
2734 ;; ORDINARY. See if they can be EXPIRED!!!
2737 ((not (integerp fetch-date))
2738 'read) ;; never fetched article (may expire
2740 ((not (file-exists-p
2741 (concat dir (number-to-string
2743 (setf (nth 1 entry) nil)
2744 'externally-expired) ;; Can't find the cached
2745 ;; article. Handle case
2746 ;; as though this article
2747 ;; was never fetched.
2749 ;; We now have the arrival day, so we see
2750 ;; whether it's old enough to be expired.
2756 ;; I found some reason to expire this entry.
2758 (let ((actions nil))
2759 (when (memq type '(forced expired))
2760 (ignore-errors ; Just being paranoid.
2761 (delete-file (concat dir (number-to-string
2763 (push "expired cached article" actions))
2764 (setf (nth 1 entry) nil)
2768 (push "NOV entry removed" actions)
2772 ;; If considering all articles is set, I can only
2773 ;; expire article IDs that are no longer in the
2774 ;; active range (That is, articles that preceed the
2775 ;; first article in the new alist).
2776 (if (and gnus-agent-consider-all-articles
2777 (>= article-number (car active)))
2778 ;; I have to keep this ID in the alist
2779 (gnus-agent-append-to-list
2780 tail-alist (cons article-number fetch-date))
2781 (push (format "Removed %s article number from \
2782 article alist" type) actions))
2784 (gnus-agent-message 8 "gnus-agent-expire: Article %d: %s"
2786 (mapconcat 'identity actions ", "))))
2789 10 "gnus-agent-expire: Article %d: Article kept as \
2790 expiration tests failed." article-number)
2791 (gnus-agent-append-to-list
2792 tail-alist (cons article-number fetch-date)))
2795 ;; Clean up markers as I want to recycle this buffer
2796 ;; over several groups.
2798 (set-marker marker nil))
2800 (setq dlist (cdr dlist))))
2802 (setq alist (cdr alist))
2804 (let ((inhibit-quit t))
2805 (unless (equal alist gnus-agent-article-alist)
2806 (setq gnus-agent-article-alist alist)
2807 (gnus-agent-save-alist group)
2809 ;; The active list changed, set the agent's active range
2810 ;; to match the beginning of the list.
2812 (setcar active (caar alist))))
2814 (when (buffer-modified-p)
2815 (gnus-make-directory dir)
2816 (write-region-as-coding-system gnus-agent-file-coding-system
2817 (point-min) (point-max) nov-file
2819 ;; clear the modified flag as that I'm not confused by
2820 ;; its status on the next pass through this routine.
2821 (set-buffer-modified-p nil))
2823 (when (eq articles t)
2824 (gnus-summary-update-info))))))))
2826 (defun gnus-agent-expire (&optional articles group force)
2827 "Expire all old articles.
2828 If you want to force expiring of certain articles, this function can
2829 take ARTICLES, GROUP and FORCE parameters as well.
2831 The articles on which the expiration process runs are selected as follows:
2832 if ARTICLES is null, all read and unmarked articles.
2833 if ARTICLES is t, all articles.
2834 if ARTICLES is a list, just those articles.
2835 Setting GROUP will limit expiration to that group.
2836 FORCE is equivalent to setting the expiration predicates to true."
2840 (gnus-agent-expire-group group articles force)
2841 (if (or (not (eq articles t))
2842 (yes-or-no-p "Are you sure that you want to expire all \
2843 articles in every agentized group."))
2844 (let ((methods gnus-agent-covered-methods)
2845 ;; Bind gnus-agent-expire-current-dirs to enable tracking
2846 ;; of agent directories.
2847 (gnus-agent-expire-current-dirs nil)
2848 gnus-command-method overview orig)
2849 (setq overview (gnus-get-buffer-create " *expire overview*"))
2851 (while (setq gnus-command-method (pop methods))
2852 (let ((active-file (gnus-agent-lib-file "active")))
2853 (when (file-exists-p active-file)
2855 (nnheader-insert-file-contents active-file)
2856 (gnus-active-to-gnus-format
2858 (setq orig (gnus-make-hashtable
2859 (count-lines (point-min) (point-max))))))
2860 (dolist (expiring-group (gnus-groups-from-server
2861 gnus-command-method))
2863 (gnus-gethash-safe expiring-group orig)))
2867 (gnus-agent-expire-group-1
2868 expiring-group overview active articles force)))))
2869 (gnus-agent-write-active active-file orig t))))
2870 (kill-buffer overview))
2871 (gnus-agent-expire-unagentized-dirs)
2872 (gnus-message 4 "Expiry...done")))))
2874 (defun gnus-agent-expire-unagentized-dirs ()
2875 (when (and gnus-agent-expire-unagentized-dirs
2876 (boundp 'gnus-agent-expire-current-dirs))
2877 (let* ((keep (gnus-make-hashtable))
2878 ;; Formally bind gnus-agent-expire-current-dirs so that the
2879 ;; compiler will not complain about free references.
2880 (gnus-agent-expire-current-dirs
2881 (symbol-value 'gnus-agent-expire-current-dirs))
2884 (gnus-sethash gnus-agent-directory t keep)
2885 (while gnus-agent-expire-current-dirs
2886 (setq dir (pop gnus-agent-expire-current-dirs))
2887 (when (and (stringp dir)
2888 (file-directory-p dir))
2889 (while (not (gnus-gethash dir keep))
2890 (gnus-sethash dir t keep)
2891 (setq dir (file-name-directory (directory-file-name dir))))))
2898 "Given a directory, check it and its subdirectories for
2899 membership in the keep hash. If it isn't found, add
2901 (let ((files (directory-files d))
2903 (while (setq file (pop files))
2904 (cond ((equal file ".") ; Ignore self
2906 ((equal file "..") ; Ignore parent
2908 ((equal file ".overview")
2909 ;; Directory must contain .overview to be
2910 ;; agent's cache of a group.
2911 (let ((d (file-name-as-directory d))
2913 ;; Search ancestor's for last directory NOT
2914 ;; found in keep hash.
2915 (while (not (gnus-gethash
2916 (setq d (file-name-directory d)) keep))
2918 d (directory-file-name d)))
2919 ;; if ANY ancestor was NOT in keep hash and
2920 ;; it it's already in to-remove, add it to
2923 (not (member r to-remove)))
2924 (push r to-remove))))
2925 ((file-directory-p (setq file (nnheader-concat d file)))
2926 (funcall checker file)))))))))
2927 (funcall checker (expand-file-name gnus-agent-directory))
2929 (when (and to-remove
2930 (or gnus-expert-user
2932 "gnus-agent-expire has identified local directories that are\
2933 not currently required by any agentized group. Do you wish to consider\
2936 (let ((dir (pop to-remove)))
2937 (if (gnus-y-or-n-p (format "Delete %s? " dir))
2938 (let* (delete-recursive
2943 (if (file-directory-p f-or-d)
2945 (delete-directory f-or-d)
2948 (or (member f '("." ".."))
2949 (funcall delete-recursive
2952 (directory-files f-or-d))
2953 (delete-directory f-or-d)))
2954 (delete-file f-or-d)))))))
2955 (funcall delete-recursive dir))))))))))
2958 (defun gnus-agent-batch ()
2959 "Start Gnus, send queue and fetch session."
2961 (let ((init-file-user "")
2962 (gnus-always-read-dribble-file t))
2964 (let ((gnus-agent-confirmation-function 'gnus-agent-batch-confirmation))
2965 (gnus-group-send-queue)
2966 (gnus-agent-fetch-session)))
2968 (defun gnus-agent-unread-articles (group)
2969 (let* ((read (gnus-info-read (gnus-get-info group)))
2970 (known (gnus-agent-load-alist group))
2972 (tail-unread unread))
2973 (while (and known read)
2974 (let ((candidate (car (pop known))))
2975 (while (let* ((range (car read))
2976 (min (if (numberp range) range (car range)))
2977 (max (if (numberp range) range (cdr range))))
2978 (cond ((or (not min)
2980 (gnus-agent-append-to-list tail-unread candidate)
2983 (setq read (cdr read))))))))
2985 (gnus-agent-append-to-list tail-unread (car (pop known))))
2988 (defun gnus-agent-uncached-articles (articles group &optional cached-header)
2989 "Restrict ARTICLES to numbers already fetched.
2990 Returns a sublist of ARTICLES that excludes thos article ids in GROUP
2991 that have already been fetched.
2992 If CACHED-HEADER is nil, articles are only excluded if the article itself
2995 ;; Logically equivalent to: (gnus-sorted-difference articles (mapcar
2996 ;; 'car gnus-agent-article-alist))
2998 ;; Functionally, I don't need to construct a temp list using mapcar.
3000 (if (and (or gnus-agent-cache (not gnus-plugged))
3001 (gnus-agent-load-alist group))
3002 (let* ((ref gnus-agent-article-alist)
3004 (uncached (list nil))
3005 (tail-uncached uncached))
3006 (while (and ref arts)
3007 (let ((v1 (car arts))
3009 (cond ((< v1 v2) ; v1 does not appear in the reference list
3010 (gnus-agent-append-to-list tail-uncached v1)
3011 (setq arts (cdr arts)))
3013 (unless (or cached-header (cdar ref)) ; v1 is already cached
3014 (gnus-agent-append-to-list tail-uncached v1))
3015 (setq arts (cdr arts))
3016 (setq ref (cdr ref)))
3017 (t ; reference article (v2) preceeds the list being filtered
3018 (setq ref (cdr ref))))))
3020 (gnus-agent-append-to-list tail-uncached (pop arts)))
3022 ;; if gnus-agent-load-alist fails, no articles are cached.
3025 (defun gnus-agent-retrieve-headers (articles group &optional fetch-old)
3027 (gnus-agent-create-buffer)
3028 (let ((gnus-decode-encoded-word-function 'identity)
3029 (file (gnus-agent-article-name ".overview" group))
3030 cached-articles uncached-articles)
3031 (gnus-make-directory (nnheader-translate-file-chars
3032 (file-name-directory file) t))
3034 ;; Populate temp buffer with known headers
3035 (when (file-exists-p file)
3036 (with-current-buffer gnus-agent-overview-buffer
3038 (let ((nnheader-file-coding-system
3039 gnus-agent-file-coding-system))
3040 (nnheader-insert-nov-file file (car articles)))))
3042 (if (setq uncached-articles (gnus-agent-uncached-articles articles group
3045 ;; Populate nntp-server-buffer with uncached headers
3046 (set-buffer nntp-server-buffer)
3048 (cond ((not (eq 'nov (let (gnus-agent) ; Turn off agent
3049 (gnus-retrieve-headers
3050 uncached-articles group fetch-old))))
3051 (nnvirtual-convert-headers))
3052 ((eq 'nntp (car gnus-current-select-method))
3053 ;; The author of gnus-get-newsgroup-headers-xover
3054 ;; reports that the XOVER command is commonly
3055 ;; unreliable. The problem is that recently
3056 ;; posted articles may not be entered into the
3057 ;; NOV database in time to respond to my XOVER
3060 ;; I'm going to use his assumption that the NOV
3061 ;; database is updated in order of ascending
3062 ;; article ID. Therefore, a response containing
3063 ;; article ID N implies that all articles from 1
3064 ;; to N-1 are up-to-date. Therefore, missing
3065 ;; articles in that range have expired.
3067 (set-buffer nntp-server-buffer)
3068 (let* ((fetched-articles (list nil))
3069 (tail-fetched-articles fetched-articles)
3070 (min (cond ((numberp fetch-old)
3071 (max 1 (- (car articles) fetch-old)))
3076 (max (car (last articles))))
3078 ;; Get the list of articles that were fetched
3079 (goto-char (point-min))
3080 (let ((pm (point-max)))
3081 (while (< (point) pm)
3082 (when (looking-at "[0-9]+\t")
3083 (gnus-agent-append-to-list
3084 tail-fetched-articles
3085 (read (current-buffer))))
3088 ;; Clip this list to the headers that will
3089 ;; actually be returned
3090 (setq fetched-articles (gnus-list-range-intersection
3091 (cdr fetched-articles)
3094 ;; Clip the uncached articles list to exclude
3095 ;; IDs after the last FETCHED header. The
3096 ;; excluded IDs may be fetchable using HEAD.
3097 (if (car tail-fetched-articles)
3098 (setq uncached-articles
3099 (gnus-list-range-intersection
3101 (cons (car uncached-articles)
3102 (car tail-fetched-articles)))))
3104 ;; Create the list of articles that were
3105 ;; "successfully" fetched. Success, in this
3106 ;; case, means that the ID should not be
3107 ;; fetched again. In the case of an expired
3108 ;; article, the header will not be fetched.
3109 (setq uncached-articles
3110 (gnus-sorted-nunion fetched-articles
3114 ;; Erase the temp buffer
3115 (set-buffer gnus-agent-overview-buffer)
3118 ;; Copy the nntp-server-buffer to the temp buffer
3119 (set-buffer nntp-server-buffer)
3120 (copy-to-buffer gnus-agent-overview-buffer (point-min) (point-max))
3122 ;; Merge the temp buffer with the known headers (found on
3123 ;; disk in FILE) into the nntp-server-buffer
3124 (when (and uncached-articles (file-exists-p file))
3125 (gnus-agent-braid-nov group uncached-articles file))
3127 ;; Save the new set of known headers to FILE
3128 (set-buffer nntp-server-buffer)
3129 (gnus-agent-check-overview-buffer)
3130 (write-region-as-coding-system
3131 gnus-agent-file-coding-system
3132 (point-min) (point-max) file nil 'silent)
3134 ;; Update the group's article alist to include the newly
3135 ;; fetched articles.
3136 (gnus-agent-load-alist group)
3137 (gnus-agent-save-alist group uncached-articles nil)
3140 ;; Copy the temp buffer to the nntp-server-buffer
3141 (set-buffer nntp-server-buffer)
3143 (insert-buffer-substring gnus-agent-overview-buffer)))
3146 (not (numberp fetch-old)))
3147 t ; Don't remove anything.
3148 (nnheader-nov-delete-outside-range
3149 (if fetch-old (max 1 (- (car articles) fetch-old))
3151 (car (last articles)))
3156 (defun gnus-agent-request-article (article group)
3157 "Retrieve ARTICLE in GROUP from the agent cache."
3158 (when (and gnus-agent
3159 (or gnus-agent-cache
3162 (let* ((gnus-command-method (gnus-find-method-for-group group))
3163 (file (gnus-agent-article-name (number-to-string article) group))
3164 (buffer-read-only nil))
3165 (when (and (file-exists-p file)
3166 (> (nth 7 (file-attributes file)) 0))
3168 (gnus-kill-all-overlays)
3169 (insert-file-contents-as-coding-system gnus-cache-coding-system file)
3172 (defun gnus-agent-regenerate-group (group &optional reread)
3174 If REREAD is t, all articles in the .overview are marked as unread.
3175 If REREAD is not nil, downloaded articles are marked as unread."
3177 (list (let ((def (or (gnus-group-group-name)
3178 gnus-newsgroup-name)))
3179 (let ((select (read-string (if def
3180 (concat "Group Name ("
3183 (if (and (equal "" select)
3189 "Reread (nil)? (t=>all, nil=>none, some=>all downloaded): "))))
3190 (gnus-message 5 "Regenerating in %s" group)
3191 (let* ((gnus-command-method (or gnus-command-method
3192 (gnus-find-method-for-group group)))
3193 (file (gnus-agent-article-name ".overview" group))
3194 (dir (file-name-directory file))
3196 (downloaded (if (file-exists-p dir)
3197 (sort (mapcar (lambda (name) (string-to-int name))
3198 (directory-files dir nil "^[0-9]+$" t))
3200 (progn (gnus-make-directory dir) nil)))
3205 (mm-with-unibyte-buffer
3206 (if (file-exists-p file)
3207 (let ((nnheader-file-coding-system
3208 gnus-agent-file-coding-system))
3209 (nnheader-insert-file-contents file)))
3210 (set-buffer-modified-p nil)
3212 ;; Load the article IDs found in the overview file. As a
3213 ;; side-effect, validate the file contents.
3217 (goto-char (point-min))
3218 (while (< (point) (point-max))
3219 (cond ((and (looking-at "[0-9]+\t")
3220 (<= (- (match-end 0) (match-beginning 0)) 9))
3221 (push (read (current-buffer)) nov-arts)
3223 (let ((l1 (car nov-arts))
3224 (l2 (cadr nov-arts)))
3228 (gnus-message 3 "gnus-agent-regenerate-group: NOV\
3229 entries are NOT in ascending order.")
3230 ;; Don't sort now as I haven't verified
3231 ;; that every line begins with a number
3235 (gnus-message 4 "gnus-agent-regenerate-group: NOV\
3236 entries contained duplicate of article %s. Duplicate deleted." l1)
3238 (setq nov-arts (cdr nov-arts))))))
3240 (gnus-message 1 "gnus-agent-regenerate-group: NOV\
3241 entries contained line that did not begin with an article number. Deleted\
3243 (gnus-delete-line))))
3246 (gnus-message 5 "gnus-agent-regenerate-group: Sorting NOV\
3247 entries into ascending order.")
3248 (sort-numeric-fields 1 (point-min) (point-max))
3249 (setq nov-arts nil)))))
3250 (gnus-agent-check-overview-buffer)
3252 ;; Construct a new article alist whose nodes match every header
3253 ;; in the .overview file. As a side-effect, missing headers are
3254 ;; reconstructed from the downloaded article file.
3255 (while (or downloaded nov-arts)
3256 (cond ((and downloaded
3258 (> (car downloaded) (car nov-arts))))
3259 ;; This entry is missing from the overview file
3260 (gnus-message 3 "Regenerating NOV %s %d..." group
3262 (let ((file (concat dir (number-to-string (car downloaded)))))
3263 (mm-with-unibyte-buffer
3264 (nnheader-insert-file-contents file)
3265 (nnheader-remove-body)
3266 (setq header (nnheader-parse-naked-head)))
3267 (mail-header-set-number header (car downloaded))
3269 (let ((key (concat "^" (int-to-string (car nov-arts))
3271 (or (re-search-backward key nil t)
3272 (re-search-forward key))
3274 (goto-char (point-min)))
3275 (nnheader-insert-nov header))
3276 (setq nov-arts (cons (car downloaded) nov-arts)))
3277 ((eq (car downloaded) (car nov-arts))
3278 ;; This entry in the overview has been downloaded
3279 (push (cons (car downloaded)
3281 (nth 5 (file-attributes
3282 (concat dir (number-to-string
3283 (car downloaded))))))) alist)
3284 (setq downloaded (cdr downloaded))
3285 (setq nov-arts (cdr nov-arts)))
3287 ;; This entry in the overview has not been downloaded
3288 (push (cons (car nov-arts) nil) alist)
3289 (setq nov-arts (cdr nov-arts)))))
3291 ;; When gnus-agent-consider-all-articles is set,
3292 ;; gnus-agent-regenerate-group should NOT remove article IDs from
3293 ;; the alist. Those IDs serve as markers to indicate that an
3294 ;; attempt has been made to fetch that article's header.
3296 ;; When gnus-agent-consider-all-articles is NOT set,
3297 ;; gnus-agent-regenerate-group can remove the article ID of every
3298 ;; article (with the exception of the last ID in the list - it's
3299 ;; special) that no longer appears in the overview. In this
3300 ;; situtation, the last article ID in the list implies that it,
3301 ;; and every article ID preceeding it, have been fetched from the
3303 (if gnus-agent-consider-all-articles
3304 ;; Restore all article IDs that were not found in the overview file.
3305 (let* ((n (cons nil alist))
3307 (o (gnus-agent-load-alist group)))
3309 (let ((nID (caadr n))
3312 (setq n (setcdr n (list (list oID))))
3315 (setcdr n (cons (list oID) (cdr n)))
3321 (setq n (cdr n))))))
3322 (setq alist (cdr merged)))
3323 ;; Restore the last article ID if it is not already in the new alist
3324 (let ((n (last alist))
3325 (o (last (gnus-agent-load-alist group))))
3329 (push (cons (caar o) nil) alist))
3330 ((< (caar n) (caar o))
3331 (setcdr n (list (car o)))))))
3333 (let ((inhibit-quit t))
3334 (if (setq regenerated (buffer-modified-p))
3335 (write-region-as-coding-system
3336 gnus-agent-file-coding-system
3337 (point-min) (point-max) file nil 'silent))
3339 (setq regenerated (or regenerated
3340 (and reread gnus-agent-article-alist)
3341 (not (equal alist gnus-agent-article-alist)))
3344 (setq gnus-agent-article-alist alist)
3347 (gnus-agent-save-alist group)))
3350 (when (and reread gnus-agent-article-alist)
3351 (gnus-make-ascending-articles-unread
3353 (delq nil (mapcar (function (lambda (c)
3354 (cond ((eq reread t)
3358 gnus-agent-article-alist)))
3360 (when (gnus-buffer-live-p gnus-group-buffer)
3361 (gnus-group-update-group group t)
3365 (gnus-message 5 nil)
3369 (defun gnus-agent-regenerate (&optional clean reread)
3370 "Regenerate all agent covered files.
3371 If CLEAN, don't read existing active files."
3374 (gnus-message 4 "Regenerating Gnus agent files...")
3375 (dolist (gnus-command-method gnus-agent-covered-methods)
3376 (let ((active-file (gnus-agent-lib-file "active"))
3377 active-hashtb active-changed
3379 (gnus-make-directory (file-name-directory active-file))
3381 (setq active-hashtb (gnus-make-hashtable 1000))
3382 (mm-with-unibyte-buffer
3383 (if (file-exists-p active-file)
3384 (let ((nnheader-file-coding-system
3385 gnus-agent-file-coding-system))
3386 (nnheader-insert-file-contents active-file))
3387 (setq active-changed t))
3388 (gnus-active-to-gnus-format
3389 nil (setq active-hashtb
3390 (gnus-make-hashtable
3391 (count-lines (point-min) (point-max)))))))
3392 (dolist (group (gnus-groups-from-server gnus-command-method))
3393 (setq regenerated (or (gnus-agent-regenerate-group group reread)
3395 (let ((min (or (caar gnus-agent-article-alist) 1))
3396 (max (or (caar (last gnus-agent-article-alist)) 0))
3397 (active (gnus-gethash-safe (gnus-group-real-name group)
3399 (read (gnus-info-read (gnus-get-info group))))
3402 (setq active (cons min max)
3404 (gnus-sethash group active active-hashtb))
3405 (when (> (car active) min)
3407 (setq active-changed t))
3408 (when (< (cdr active) max)
3410 (setq active-changed t)))))
3411 (when active-changed
3412 (setq regenerated t)
3413 (gnus-message 4 "Regenerate %s" active-file)
3414 (let ((nnmail-active-file-coding-system
3415 gnus-agent-file-coding-system))
3416 (gnus-write-active-file active-file active-hashtb)))))
3417 (gnus-message 4 "Regenerating Gnus agent files...done")
3420 (defun gnus-agent-go-online (&optional force)
3421 "Switch servers into online status."
3422 (interactive (list t))
3423 (dolist (server gnus-opened-servers)
3424 (when (eq (nth 1 server) 'offline)
3425 (if (if (eq force 'ask)
3427 (format "Switch %s:%s into online status? "
3428 (caar server) (cadar server)))
3430 (setcar (nthcdr 1 server) 'close)))))
3432 (defun gnus-agent-toggle-group-plugged (group)
3433 "Toggle the status of the server of the current group."
3434 (interactive (list (gnus-group-group-name)))
3435 (let* ((method (gnus-find-method-for-group group))
3436 (status (cadr (assoc method gnus-opened-servers))))
3437 (if (eq status 'offline)
3438 (gnus-server-set-status method 'closed)
3439 (gnus-close-server method)
3440 (gnus-server-set-status method 'offline))
3441 (message "Turn %s:%s from %s to %s." (car method) (cadr method)
3442 (if (eq status 'offline) 'offline 'online)
3443 (if (eq status 'offline) 'online 'offline))))
3445 (defun gnus-agent-group-covered-p (group)
3446 (member (gnus-group-method group)
3447 gnus-agent-covered-methods))
3449 (add-hook 'gnus-group-prepare-hook
3453 (when (listp gnus-agent-expire-days)
3456 (gnus-message 1 "WARNING: gnus-agent-expire-days no longer\
3457 supports being set to a list.")(sleep-for 3)
3458 (gnus-message 1 "Change your configuration to set it to an\
3459 integer.")(sleep-for 3)
3460 (gnus-message 1 "I am now setting group parameters on each\
3461 group to match the configuration that the list offered.")
3464 (let ((groups (gnus-group-listed-groups)))
3466 (let* ((group (pop groups))
3467 (days gnus-agent-expire-days)
3470 (when (eq 0 (string-match
3473 (throw 'found (cadar days)))
3474 (setq days (cdr days)))
3477 (gnus-group-set-parameter group 'agent-days-until-old
3480 (let ((h gnus-group-prepare-hook))
3482 (let ((func (pop h)))
3483 (when (and (listp func)
3484 (eq (cadr (caddr func)) 'gnus-agent-do-once))
3485 (remove-hook 'gnus-group-prepare-hook func)
3488 (gnus-message 1 "I have finished setting group parameters on\
3489 each group. You may now customize your groups and/or topics to control the\
3492 (provide 'gnus-agent)
3494 ;;; gnus-agent.el ends here