1 ;;; gnus-agent.el --- unplugged support for Semi-gnus
2 ;; Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
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))
39 (if (featurep 'xemacs)
42 (require 'gnus-group))
45 (autoload 'gnus-server-update-server "gnus-srvr")
46 (autoload 'gnus-agent-customize-category "gnus-cus")
49 (defcustom gnus-agent-directory (nnheader-concat gnus-directory "agent/")
50 "Where the Gnus agent will store its files."
54 (defcustom gnus-agent-plugged-hook nil
55 "Hook run when plugging into the network."
59 (defcustom gnus-agent-unplugged-hook nil
60 "Hook run when unplugging from the network."
64 (defcustom gnus-agent-fetched-hook nil
65 "Hook run when finished fetching articles."
69 (defcustom gnus-agent-handle-level gnus-level-subscribed
70 "Groups on levels higher than this variable will be ignored by the Agent."
74 (defcustom gnus-agent-expire-days 7
75 "Read articles older than this will be expired.
76 If you wish to disable Agent expiring, see `gnus-agent-enable-expiration'."
78 :type '(number :tag "days"))
80 (defcustom gnus-agent-expire-all nil
81 "If non-nil, also expire unread, ticked and dormant articles.
82 If nil, only read articles will be expired."
86 (defcustom gnus-agent-group-mode-hook nil
87 "Hook run in Agent group minor modes."
91 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
92 (when (featurep 'xemacs)
93 (add-hook 'gnus-agent-group-mode-hook 'gnus-xmas-agent-group-menu-add))
95 (defcustom gnus-agent-summary-mode-hook nil
96 "Hook run in Agent summary minor modes."
100 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
101 (when (featurep 'xemacs)
102 (add-hook 'gnus-agent-summary-mode-hook 'gnus-xmas-agent-summary-menu-add))
104 (defcustom gnus-agent-server-mode-hook nil
105 "Hook run in Agent summary minor modes."
109 ;; Extracted from gnus-xmas-redefine in order to preserve user settings
110 (when (featurep 'xemacs)
111 (add-hook 'gnus-agent-server-mode-hook 'gnus-xmas-agent-server-menu-add))
113 (defcustom gnus-agent-confirmation-function 'y-or-n-p
114 "Function to confirm when error happens."
119 (defcustom gnus-agent-large-newsgroup nil
120 "*The number of articles which indicates a large newsgroup.
121 If the number of unread articles exceeds it, The number of articles to be
122 fetched will be limited to it. If not a positive integer, never consider it."
124 :type '(choice (const nil)
125 (integer :tag "Number")))
127 (defcustom gnus-agent-synchronize-flags 'ask
128 "Indicate if flags are synchronized when you plug in.
129 If this is `ask' the hook will query the user."
131 :type '(choice (const :tag "Always" t)
132 (const :tag "Never" nil)
133 (const :tag "Ask" ask))
136 (defcustom gnus-agent-go-online 'ask
137 "Indicate if offline servers go online when you plug in.
138 If this is `ask' the hook will query the user."
140 :type '(choice (const :tag "Always" t)
141 (const :tag "Never" nil)
142 (const :tag "Ask" ask))
145 (defcustom gnus-agent-mark-unread-after-downloaded t
146 "Indicate whether to mark articles unread after downloaded."
151 (defcustom gnus-agent-download-marks '(download)
152 "Marks for downloading."
154 :type '(repeat (symbol :tag "Mark"))
157 (defcustom gnus-agent-consider-all-articles nil
158 "When non-nil, the agent will let the agent predicate decide
159 whether articles need to be downloaded or not, for all articles. When
160 nil, the default, the agent will only let the predicate decide
161 whether unread articles are downloaded or not. If you enable this,
162 groups with large active ranges may open slower and you may also want
163 to look into the agent expiry settings to block the expiration of
164 read articles as they would just be downloaded again."
169 (defcustom gnus-agent-max-fetch-size 10000000 ;; 10 Mb
170 "Chunk size for `gnus-agent-fetch-session'.
171 The function will split its article fetches into chunks smaller than
176 (defcustom gnus-agent-enable-expiration 'ENABLE
177 "The default expiration state for each group.
178 When set to ENABLE, the default, `gnus-agent-expire' will expire old
179 contents from a group's local storage. This value may be overridden
180 to disable expiration in specific categories, topics, and groups. Of
181 course, you could change gnus-agent-enable-expiration to DISABLE then
182 enable expiration per categories, topics, and groups."
184 :type '(radio (const :format "Enable " ENABLE)
185 (const :format "Disable " DISABLE)))
187 (defcustom gnus-agent-expire-unagentized-dirs t
188 "*Whether expiration should expire in unagentized directories.
189 Have gnus-agent-expire scan the directories under
190 \(gnus-agent-directory) for groups that are no longer agentized.
191 When found, offer to remove them."
195 (defcustom gnus-agent-auto-agentize-methods '(nntp nnimap)
196 "Initially, all servers from these methods are agentized.
197 The user may remove or add servers using the Server buffer.
198 See Info node `(gnus)Server Buffer'."
199 :type '(repeat symbol)
202 (defcustom gnus-agent-queue-mail t
203 "Whether and when outgoing mail should be queued by the agent.
204 When `always', always queue outgoing mail. When nil, never
205 queue. Otherwise, queue if and only if unplugged."
207 :type '(radio (const :format "Always" always)
208 (const :format "Never" nil)
209 (const :format "When plugged" t)))
211 (defcustom gnus-agent-prompt-send-queue nil
212 "If non-nil, `gnus-group-send-queue' will prompt if called when
217 ;;; Internal variables
219 (defvar gnus-agent-history-buffers nil)
220 (defvar gnus-agent-buffer-alist nil)
221 (defvar gnus-agent-article-alist nil
222 "An assoc list identifying the articles whose headers have been fetched.
223 If successfully fetched, these headers will be stored in the group's overview
224 file. The key of each assoc pair is the article ID, the value of each assoc
225 pair is a flag indicating whether the identified article has been downloaded
226 \(gnus-agent-fetch-articles sets the value to the day of the download).
228 1) The last element of this list can not be expired as some
229 routines (for example, get-agent-fetch-headers) use the last
230 value to track which articles have had their headers retrieved.
231 2) The function `gnus-agent-regenerate' may destructively modify the value.")
232 (defvar gnus-agent-group-alist nil)
233 (defvar gnus-category-alist nil)
234 (defvar gnus-agent-current-history nil)
235 (defvar gnus-agent-overview-buffer nil)
236 (defvar gnus-category-predicate-cache nil)
237 (defvar gnus-category-group-cache nil)
238 (defvar gnus-agent-spam-hashtb nil)
239 (defvar gnus-agent-file-name nil)
240 (defvar gnus-agent-send-mail-function nil)
241 (defvar gnus-agent-file-coding-system 'raw-text)
242 (defvar gnus-agent-file-loading-cache nil)
245 (defvar gnus-headers)
252 (defun gnus-open-agent ()
254 (gnus-agent-read-servers)
256 (gnus-agent-create-buffer)
257 (add-hook 'gnus-group-mode-hook 'gnus-agent-mode)
258 (add-hook 'gnus-summary-mode-hook 'gnus-agent-mode)
259 (add-hook 'gnus-server-mode-hook 'gnus-agent-mode))
261 (defun gnus-agent-create-buffer ()
262 (if (gnus-buffer-live-p gnus-agent-overview-buffer)
264 (setq gnus-agent-overview-buffer
265 (gnus-get-buffer-create " *Gnus agent overview*"))
266 (with-current-buffer gnus-agent-overview-buffer
267 (set-buffer-multibyte t))
270 (gnus-add-shutdown 'gnus-close-agent 'gnus)
272 (defun gnus-close-agent ()
273 (setq gnus-category-predicate-cache nil
274 gnus-category-group-cache nil
275 gnus-agent-spam-hashtb nil)
276 (gnus-kill-buffer gnus-agent-overview-buffer))
279 ;;; Utility functions
282 (defun gnus-agent-read-file (file)
283 "Load FILE and do a `read' there."
286 (nnheader-insert-file-contents file)
287 (goto-char (point-min))
288 (read (current-buffer)))))
290 (defsubst gnus-agent-method ()
291 (concat (symbol-name (car gnus-command-method)) "/"
292 (if (equal (cadr gnus-command-method) "")
294 (cadr gnus-command-method))))
296 (defsubst gnus-agent-directory ()
297 "The name of the Gnus agent directory."
298 (nnheader-concat gnus-agent-directory
299 (nnheader-translate-file-chars (gnus-agent-method)) "/"))
301 (defun gnus-agent-lib-file (file)
302 "The full name of the Gnus agent library FILE."
303 (expand-file-name file
304 (file-name-as-directory
305 (expand-file-name "agent.lib" (gnus-agent-directory)))))
307 (defun gnus-agent-cat-set-property (category property value)
309 (setcdr (or (assq property category)
310 (let ((cell (cons property nil)))
311 (setcdr category (cons cell (cdr category)))
313 (let ((category category))
314 (while (cond ((eq property (caadr category))
315 (setcdr category (cddr category))
318 (setq category (cdr category)))))))
322 (defmacro gnus-agent-cat-defaccessor (name prop-name)
323 "Define accessor and setter methods for manipulating a list of the form
324 \(NAME (PROPERTY1 VALUE1) ... (PROPERTY_N VALUE_N)).
325 Given the call (gnus-agent-cat-defaccessor func PROPERTY1), the list may be
326 manipulated as follows:
327 (func LIST): Returns VALUE1
328 (setf (func LIST) NEW_VALUE1): Replaces VALUE1 with NEW_VALUE1."
329 `(progn (defmacro ,name (category)
330 (list (quote cdr) (list (quote assq)
331 (quote (quote ,prop-name)) category)))
333 (define-setf-method ,name (category)
334 (let* ((--category--temp-- (make-symbol "--category--"))
335 (--value--temp-- (make-symbol "--value--")))
336 (list (list --category--temp--) ; temporary-variables
337 (list category) ; value-forms
338 (list --value--temp--) ; store-variables
339 (let* ((category --category--temp--) ; store-form
340 (value --value--temp--))
341 (list (quote gnus-agent-cat-set-property)
343 (quote (quote ,prop-name))
345 (list (quote ,name) --category--temp--) ; access-form
349 (defmacro gnus-agent-cat-name (category)
352 (gnus-agent-cat-defaccessor
353 gnus-agent-cat-days-until-old agent-days-until-old)
354 (gnus-agent-cat-defaccessor
355 gnus-agent-cat-enable-expiration agent-enable-expiration)
356 (gnus-agent-cat-defaccessor
357 gnus-agent-cat-groups agent-groups)
358 (gnus-agent-cat-defaccessor
359 gnus-agent-cat-high-score agent-high-score)
360 (gnus-agent-cat-defaccessor
361 gnus-agent-cat-length-when-long agent-length-when-long)
362 (gnus-agent-cat-defaccessor
363 gnus-agent-cat-length-when-short agent-length-when-short)
364 (gnus-agent-cat-defaccessor
365 gnus-agent-cat-low-score agent-low-score)
366 (gnus-agent-cat-defaccessor
367 gnus-agent-cat-predicate agent-predicate)
368 (gnus-agent-cat-defaccessor
369 gnus-agent-cat-score-file agent-score-file)
370 (gnus-agent-cat-defaccessor
371 gnus-agent-cat-enable-undownloaded-faces agent-enable-undownloaded-faces)
374 (defsetf gnus-agent-cat-groups (category) (groups)
375 (list 'gnus-agent-set-cat-groups category groups)))
377 (defun gnus-agent-set-cat-groups (category groups)
378 (unless (eq groups 'ignore)
380 (old-g (gnus-agent-cat-groups category)))
381 (cond ((eq new-g old-g)
382 ;; gnus-agent-add-group is fiddling with the group
383 ;; list. Still, Im done.
386 ((eq new-g (cdr old-g))
387 ;; gnus-agent-add-group is fiddling with the group list
388 (setcdr (or (assq 'agent-groups category)
389 (let ((cell (cons 'agent-groups nil)))
390 (setcdr category (cons cell (cdr category)))
393 (let ((groups groups))
395 (let* ((group (pop groups))
396 (old-category (gnus-group-category group)))
397 (if (eq category old-category)
399 (setf (gnus-agent-cat-groups old-category)
400 (delete group (gnus-agent-cat-groups
402 ;; Purge cache as preceeding loop invalidated it.
403 (setq gnus-category-group-cache nil))
405 (setcdr (or (assq 'agent-groups category)
406 (let ((cell (cons 'agent-groups nil)))
407 (setcdr category (cons cell (cdr category)))
410 (defsubst gnus-agent-cat-make (name &optional default-agent-predicate)
411 (list name `(agent-predicate . ,(or default-agent-predicate 'false))))
413 ;;; Fetching setup functions.
415 (defun gnus-agent-start-fetch ()
416 "Initialize data structures for efficient fetching."
417 (gnus-agent-create-buffer))
419 (defun gnus-agent-stop-fetch ()
420 "Save all data structures and clean up."
421 (setq gnus-agent-spam-hashtb nil)
423 (set-buffer nntp-server-buffer)
426 (defmacro gnus-agent-with-fetch (&rest forms)
429 (let ((gnus-agent-fetching t))
430 (gnus-agent-start-fetch)
432 (gnus-agent-stop-fetch)))
434 (put 'gnus-agent-with-fetch 'lisp-indent-function 0)
435 (put 'gnus-agent-with-fetch 'edebug-form-spec '(body))
437 (defmacro gnus-agent-append-to-list (tail value)
438 `(setq ,tail (setcdr ,tail (cons ,value nil))))
440 (defmacro gnus-agent-message (level &rest args)
441 `(if (<= ,level gnus-verbose)
448 (defvar gnus-agent-mode-hook nil
449 "Hook run when installing agent mode.")
451 (defvar gnus-agent-mode nil)
452 (defvar gnus-agent-mode-status '(gnus-agent-mode " Plugged"))
454 (defun gnus-agent-mode ()
455 "Minor mode for providing a agent support in Gnus buffers."
456 (let* ((buffer (progn (string-match "^gnus-\\(.*\\)-mode$"
457 (symbol-name major-mode))
458 (match-string 1 (symbol-name major-mode))))
459 (mode (intern (format "gnus-agent-%s-mode" buffer))))
460 (set (make-local-variable 'gnus-agent-mode) t)
462 (set (make-local-variable mode) t)
464 (when (gnus-visual-p 'agent-menu 'menu)
465 (funcall (intern (format "gnus-agent-%s-make-menu-bar" buffer))))
466 (unless (assq 'gnus-agent-mode minor-mode-alist)
467 (push gnus-agent-mode-status minor-mode-alist))
468 (unless (assq mode minor-mode-map-alist)
469 (push (cons mode (symbol-value (intern (format "gnus-agent-%s-mode-map"
471 minor-mode-map-alist))
472 (when (eq major-mode 'gnus-group-mode)
473 (let ((init-plugged gnus-plugged)
474 (gnus-agent-go-online nil))
475 ;; g-a-t-p does nothing when gnus-plugged isn't changed.
476 ;; Therefore, make certain that the current value does not
477 ;; match the desired initial value.
478 (setq gnus-plugged :unknown)
479 (gnus-agent-toggle-plugged init-plugged)))
480 (gnus-run-hooks 'gnus-agent-mode-hook
481 (intern (format "gnus-agent-%s-mode-hook" buffer)))))
483 (defvar gnus-agent-group-mode-map (make-sparse-keymap))
484 (gnus-define-keys gnus-agent-group-mode-map
485 "Ju" gnus-agent-fetch-groups
486 "Jc" gnus-enter-category-buffer
487 "Jj" gnus-agent-toggle-plugged
488 "Js" gnus-agent-fetch-session
489 "JY" gnus-agent-synchronize-flags
490 "JS" gnus-group-send-queue
491 "Ja" gnus-agent-add-group
492 "Jr" gnus-agent-remove-group
493 "Jo" gnus-agent-toggle-group-plugged)
495 (defun gnus-agent-group-make-menu-bar ()
496 (unless (boundp 'gnus-agent-group-menu)
498 gnus-agent-group-menu gnus-agent-group-mode-map ""
500 ["Toggle plugged" gnus-agent-toggle-plugged t]
501 ["Toggle group plugged" gnus-agent-toggle-group-plugged t]
502 ["List categories" gnus-enter-category-buffer t]
503 ["Add (current) group to category" gnus-agent-add-group t]
504 ["Remove (current) group from category" gnus-agent-remove-group t]
505 ["Send queue" gnus-group-send-queue gnus-plugged]
507 ["All" gnus-agent-fetch-session gnus-plugged]
508 ["Group" gnus-agent-fetch-group gnus-plugged])
509 ["Synchronize flags" gnus-agent-synchronize-flags t]
512 (defvar gnus-agent-summary-mode-map (make-sparse-keymap))
513 (gnus-define-keys gnus-agent-summary-mode-map
514 "Jj" gnus-agent-toggle-plugged
515 "Ju" gnus-agent-summary-fetch-group
516 "JS" gnus-agent-fetch-group
517 "Js" gnus-agent-summary-fetch-series
518 "J#" gnus-agent-mark-article
519 "J\M-#" gnus-agent-unmark-article
520 "@" gnus-agent-toggle-mark
521 "Jc" gnus-agent-catchup)
523 (defun gnus-agent-summary-make-menu-bar ()
524 (unless (boundp 'gnus-agent-summary-menu)
526 gnus-agent-summary-menu gnus-agent-summary-mode-map ""
528 ["Toggle plugged" gnus-agent-toggle-plugged t]
529 ["Mark as downloadable" gnus-agent-mark-article t]
530 ["Unmark as downloadable" gnus-agent-unmark-article t]
531 ["Toggle mark" gnus-agent-toggle-mark t]
532 ["Fetch downloadable" gnus-agent-summary-fetch-group t]
533 ["Catchup undownloaded" gnus-agent-catchup t]))))
535 (defvar gnus-agent-server-mode-map (make-sparse-keymap))
536 (gnus-define-keys gnus-agent-server-mode-map
537 "Jj" gnus-agent-toggle-plugged
538 "Ja" gnus-agent-add-server
539 "Jr" gnus-agent-remove-server)
541 (defun gnus-agent-server-make-menu-bar ()
542 (unless (boundp 'gnus-agent-server-menu)
544 gnus-agent-server-menu gnus-agent-server-mode-map ""
546 ["Toggle plugged" gnus-agent-toggle-plugged t]
547 ["Add" gnus-agent-add-server t]
548 ["Remove" gnus-agent-remove-server t]))))
550 (defun gnus-agent-make-mode-line-string (string mouse-button mouse-func)
551 (if (and (fboundp 'propertize)
552 (fboundp 'make-mode-line-mouse-map))
553 (propertize string 'local-map
554 (make-mode-line-mouse-map mouse-button mouse-func))
557 (defun gnus-agent-toggle-plugged (set-to)
558 "Toggle whether Gnus is unplugged or not."
559 (interactive (list (not gnus-plugged)))
560 (cond ((eq set-to gnus-plugged)
563 (setq gnus-plugged set-to)
564 (gnus-run-hooks 'gnus-agent-plugged-hook)
565 (setcar (cdr gnus-agent-mode-status)
566 (gnus-agent-make-mode-line-string " Plugged"
568 'gnus-agent-toggle-plugged))
569 (gnus-agent-go-online gnus-agent-go-online)
570 (gnus-agent-possibly-synchronize-flags))
572 (gnus-agent-close-connections)
573 (setq gnus-plugged set-to)
574 (gnus-run-hooks 'gnus-agent-unplugged-hook)
575 (setcar (cdr gnus-agent-mode-status)
576 (gnus-agent-make-mode-line-string " Unplugged"
578 'gnus-agent-toggle-plugged))))
579 (force-mode-line-update)
580 (set-buffer-modified-p t))
582 (defmacro gnus-agent-while-plugged (&rest body)
583 `(let ((original-gnus-plugged gnus-plugged))
585 (progn (gnus-agent-toggle-plugged t)
587 (gnus-agent-toggle-plugged original-gnus-plugged))))
589 (put 'gnus-agent-while-plugged 'lisp-indent-function 0)
590 (put 'gnus-agent-while-plugged 'edebug-form-spec '(body))
592 (defun gnus-agent-close-connections ()
593 "Close all methods covered by the Gnus agent."
594 (let ((methods (gnus-agent-covered-methods)))
596 (gnus-close-server (pop methods)))))
599 (defun gnus-unplugged ()
600 "Start Gnus unplugged."
602 (setq gnus-plugged nil)
606 (defun gnus-plugged ()
607 "Start Gnus plugged."
609 (setq gnus-plugged t)
613 (defun gnus-slave-unplugged (&optional arg)
614 "Read news as a slave unplugged."
616 (setq gnus-plugged nil)
617 (gnus arg nil 'slave))
620 (defun gnus-agentize ()
621 "Allow Gnus to be an offline newsreader.
623 The gnus-agentize function is now called internally by gnus when
624 gnus-agent is set. If you wish to avoid calling gnus-agentize,
625 customize gnus-agent to nil.
627 This will modify the `gnus-setup-news-hook', and
628 `message-send-mail-real-function' variables, and install the Gnus agent
629 minor mode in all Gnus buffers."
632 (add-hook 'gnus-setup-news-hook 'gnus-agent-queue-setup)
633 (unless gnus-agent-send-mail-function
634 (setq gnus-agent-send-mail-function
635 (or message-send-mail-real-function
636 message-send-mail-function)
637 message-send-mail-real-function 'gnus-agent-send-mail))
639 ;; If the servers file doesn't exist, auto-agentize some servers and
640 ;; save the servers file so this auto-agentizing isn't invoked
642 (unless (file-exists-p (nnheader-concat gnus-agent-directory "lib/servers"))
643 (gnus-message 3 "First time agent user, agentizing remote groups...")
645 (lambda (server-or-method)
646 (let ((method (gnus-server-to-method server-or-method)))
647 (when (memq (car method)
648 gnus-agent-auto-agentize-methods)
649 (push (gnus-method-to-server method)
650 gnus-agent-covered-methods)
651 (setq gnus-agent-method-p-cache nil))))
652 (cons gnus-select-method gnus-secondary-select-methods))
653 (gnus-agent-write-servers)))
655 (defun gnus-agent-queue-setup (&optional group-name)
656 "Make sure the queue group exists.
657 Optional arg GROUP-NAME allows to specify another group."
658 (unless (gnus-gethash (format "nndraft:%s" (or group-name "queue"))
660 (gnus-request-create-group (or group-name "queue") '(nndraft ""))
661 (let ((gnus-level-default-subscribed 1))
662 (gnus-subscribe-group (format "nndraft:%s" (or group-name "queue"))
664 (gnus-group-set-parameter
665 (format "nndraft:%s" (or group-name "queue"))
666 'gnus-dummy '((gnus-draft-mode)))))
668 (defun gnus-agent-send-mail ()
669 (if (or (not gnus-agent-queue-mail)
670 (and gnus-plugged (not (eq gnus-agent-queue-mail 'always))))
671 (funcall gnus-agent-send-mail-function)
672 (goto-char (point-min))
674 (concat "^" (regexp-quote mail-header-separator) "\n"))
676 (gnus-agent-insert-meta-information 'mail)
677 (gnus-request-accept-article "nndraft:queue" nil t t)))
679 (defun gnus-agent-insert-meta-information (type &optional method)
680 "Insert meta-information into the message that says how it's to be posted.
681 TYPE can be either `mail' or `news'. If the latter, then METHOD can
684 (message-remove-header gnus-agent-meta-information-header)
685 (goto-char (point-min))
686 (insert gnus-agent-meta-information-header ": "
687 (symbol-name type) " " (format "%S" method)
690 (while (search-backward "\n" nil t)
691 (replace-match "\\n" t t))))
693 (defun gnus-agent-restore-gcc ()
694 "Restore GCC field from saved header."
696 (goto-char (point-min))
697 (while (re-search-forward (concat gnus-agent-gcc-header ":") nil t)
698 (replace-match "Gcc:" 'fixedcase))))
700 (defun gnus-agent-any-covered-gcc ()
702 (message-narrow-to-headers)
703 (let* ((gcc (mail-fetch-field "gcc" nil t))
705 (mapcar 'gnus-inews-group-method
706 (message-unquote-tokens
707 (message-tokenize-header
710 (while (and (not covered) methods)
711 (setq covered (gnus-agent-method-p (car methods))
712 methods (cdr methods)))
716 (defun gnus-agent-possibly-save-gcc ()
717 "Save GCC if Gnus is unplugged."
718 (when (and (not gnus-plugged) (gnus-agent-any-covered-gcc))
720 (goto-char (point-min))
721 (let ((case-fold-search t))
722 (while (re-search-forward "^gcc:" nil t)
723 (replace-match (concat gnus-agent-gcc-header ":") 'fixedcase))))))
725 (defun gnus-agent-possibly-do-gcc ()
726 "Do GCC if Gnus is plugged."
727 (when (or gnus-plugged (not (gnus-agent-any-covered-gcc)))
728 (gnus-inews-do-gcc)))
731 ;;; Group mode commands
734 (defun gnus-agent-fetch-groups (n)
735 "Put all new articles in the current groups into the Agent."
738 (error "Groups can't be fetched when Gnus is unplugged"))
739 (gnus-group-iterate n 'gnus-agent-fetch-group))
741 (defun gnus-agent-fetch-group (&optional group)
742 "Put all new articles in GROUP into the Agent."
743 (interactive (list (gnus-group-group-name)))
744 (setq group (or group gnus-newsgroup-name))
746 (error "No group on the current line"))
748 (gnus-agent-while-plugged
749 (let ((gnus-command-method (gnus-find-method-for-group group)))
750 (gnus-agent-with-fetch
751 (gnus-agent-fetch-group-1 group gnus-command-method)
752 (gnus-message 5 "Fetching %s...done" group)))))
754 (defun gnus-agent-add-group (category arg)
755 "Add the current group to an agent category."
761 (mapcar (lambda (cat) (list (symbol-name (car cat))))
765 (let ((cat (assq category gnus-category-alist))
767 (gnus-group-iterate arg
769 (when (gnus-agent-cat-groups (setq c (gnus-group-category group)))
770 (setf (gnus-agent-cat-groups c)
771 (delete group (gnus-agent-cat-groups c))))
772 (push group groups)))
773 (setf (gnus-agent-cat-groups cat)
774 (nconc (gnus-agent-cat-groups cat) groups))
775 (gnus-category-write)))
777 (defun gnus-agent-remove-group (arg)
778 "Remove the current group from its agent category, if any."
781 (gnus-group-iterate arg
783 (when (gnus-agent-cat-groups (setq c (gnus-group-category group)))
784 (setf (gnus-agent-cat-groups c)
785 (delete group (gnus-agent-cat-groups c))))))
786 (gnus-category-write)))
788 (defun gnus-agent-synchronize-flags ()
789 "Synchronize unplugged flags with servers."
792 (dolist (gnus-command-method (gnus-agent-covered-methods))
793 (when (file-exists-p (gnus-agent-lib-file "flags"))
794 (gnus-agent-synchronize-flags-server gnus-command-method)))))
796 (defun gnus-agent-possibly-synchronize-flags ()
797 "Synchronize flags according to `gnus-agent-synchronize-flags'."
800 (dolist (gnus-command-method (gnus-agent-covered-methods))
801 (when (file-exists-p (gnus-agent-lib-file "flags"))
802 (gnus-agent-possibly-synchronize-flags-server gnus-command-method)))))
804 (defun gnus-agent-synchronize-flags-server (method)
805 "Synchronize flags set when unplugged for server."
806 (let ((gnus-command-method method))
807 (when (file-exists-p (gnus-agent-lib-file "flags"))
808 (set-buffer (get-buffer-create " *Gnus Agent flag synchronize*"))
810 (nnheader-insert-file-contents (gnus-agent-lib-file "flags"))
811 (if (null (gnus-check-server gnus-command-method))
812 (gnus-message 1 "Couldn't open server %s" (nth 1 gnus-command-method))
814 (if (null (eval (read (current-buffer))))
816 (write-file (gnus-agent-lib-file "flags"))
817 (error "Couldn't set flags from file %s"
818 (gnus-agent-lib-file "flags"))))
819 (delete-file (gnus-agent-lib-file "flags")))
822 (defun gnus-agent-possibly-synchronize-flags-server (method)
823 "Synchronize flags for server according to `gnus-agent-synchronize-flags'."
824 (when (or (and gnus-agent-synchronize-flags
825 (not (eq gnus-agent-synchronize-flags 'ask)))
826 (and (eq gnus-agent-synchronize-flags 'ask)
827 (gnus-y-or-n-p (format "Synchronize flags on server `%s'? "
829 (gnus-agent-synchronize-flags-server method)))
832 ;;; Server mode commands
835 (defun gnus-agent-add-server ()
836 "Enroll SERVER in the agent program."
838 (let* ((server (gnus-server-server-name))
839 (named-server (gnus-server-named-server))
841 (gnus-server-get-method nil server))))
843 (error "No server on the current line"))
845 (when (gnus-agent-method-p method)
846 (error "Server already in the agent program"))
848 (push named-server gnus-agent-covered-methods)
850 (setq gnus-agent-method-p-cache nil)
851 (gnus-server-update-server server)
852 (gnus-agent-write-servers)
853 (gnus-message 1 "Entered %s into the Agent" server)))
855 (defun gnus-agent-remove-server ()
856 "Remove SERVER from the agent program."
858 (let* ((server (gnus-server-server-name))
859 (named-server (gnus-server-named-server)))
861 (error "No server on the current line"))
863 (unless (member named-server gnus-agent-covered-methods)
864 (error "Server not in the agent program"))
866 (setq gnus-agent-covered-methods
867 (delete named-server gnus-agent-covered-methods)
868 gnus-agent-method-p-cache nil)
870 (gnus-server-update-server server)
871 (gnus-agent-write-servers)
872 (gnus-message 1 "Removed %s from the agent" server)))
874 (defun gnus-agent-read-servers ()
875 "Read the alist of covered servers."
876 (setq gnus-agent-covered-methods
877 (gnus-agent-read-file
878 (nnheader-concat gnus-agent-directory "lib/servers"))
879 gnus-agent-method-p-cache nil)
881 ;; I am called so early in start-up that I can not validate server
882 ;; names. When that is the case, I skip the validation. That is
883 ;; alright as the gnus startup code calls the validate methods
885 (if gnus-server-alist
886 (gnus-agent-read-servers-validate)))
888 (defun gnus-agent-read-servers-validate ()
889 (mapcar (lambda (server-or-method)
890 (let* ((server (if (stringp server-or-method)
892 (gnus-method-to-server server-or-method)))
893 (method (gnus-server-to-method server)))
895 (unless (member server gnus-agent-covered-methods)
896 (push server gnus-agent-covered-methods)
897 (setq gnus-agent-method-p-cache nil))
898 (gnus-message 1 "Ignoring disappeared server `%s'" server))))
899 (prog1 gnus-agent-covered-methods
900 (setq gnus-agent-covered-methods nil))))
902 (defun gnus-agent-read-servers-validate-native (native-method)
903 (setq gnus-agent-covered-methods
904 (mapcar (lambda (method)
906 (equal method native-method))
908 method)) gnus-agent-covered-methods)))
910 (defun gnus-agent-write-servers ()
911 "Write the alist of covered servers."
912 (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
913 (let ((coding-system-for-write nnheader-file-coding-system)
914 (file-name-coding-system nnmail-pathname-coding-system))
915 (with-temp-file (nnheader-concat gnus-agent-directory "lib/servers")
916 (prin1 gnus-agent-covered-methods
923 (defun gnus-agent-mark-article (n &optional unmark)
924 "Mark the next N articles as downloadable.
925 If N is negative, mark backward instead. If UNMARK is non-nil, remove
926 the mark instead. The difference between N and the actual number of
927 articles marked is returned."
929 (let ((backward (< n 0))
934 (gnus-summary-set-agent-mark
935 (gnus-summary-article-number) unmark)
936 (zerop (gnus-summary-next-subject (if backward -1 1) nil t))))
939 (gnus-message 7 "No more articles"))
940 (gnus-summary-recenter)
941 (gnus-summary-position-point)
944 (defun gnus-agent-unmark-article (n)
945 "Remove the downloadable mark from the next N articles.
946 If N is negative, unmark backward instead. The difference between N and
947 the actual number of articles unmarked is returned."
949 (gnus-agent-mark-article n t))
951 (defun gnus-agent-toggle-mark (n)
952 "Toggle the downloadable mark from the next N articles.
953 If N is negative, toggle backward instead. The difference between N and
954 the actual number of articles toggled is returned."
956 (gnus-agent-mark-article n 'toggle))
958 (defun gnus-summary-set-agent-mark (article &optional unmark)
959 "Mark ARTICLE as downloadable. If UNMARK is nil, article is marked.
960 When UNMARK is t, the article is unmarked. For any other value, the
961 article's mark is toggled."
962 (let ((unmark (cond ((eq nil unmark)
967 (memq article gnus-newsgroup-downloadable)))))
968 (when (gnus-summary-goto-subject article nil t)
969 (gnus-summary-update-mark
972 (setq gnus-newsgroup-downloadable
973 (delq article gnus-newsgroup-downloadable))
974 (gnus-article-mark article))
975 (setq gnus-newsgroup-downloadable
976 (gnus-add-to-sorted-list gnus-newsgroup-downloadable article))
977 gnus-downloadable-mark)
980 (defun gnus-agent-get-undownloaded-list ()
981 "Construct list of articles that have not been downloaded."
982 (let ((gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name)))
983 (when (set (make-local-variable 'gnus-newsgroup-agentized)
984 (gnus-agent-method-p gnus-command-method))
985 (let* ((alist (gnus-agent-load-alist gnus-newsgroup-name))
986 (headers (sort (mapcar (lambda (h)
987 (mail-header-number h))
988 gnus-newsgroup-headers) '<))
989 (cached (and gnus-use-cache gnus-newsgroup-cached))
990 (undownloaded (list nil))
991 (tail-undownloaded undownloaded)
992 (unfetched (list nil))
993 (tail-unfetched unfetched))
994 (while (and alist headers)
995 (let ((a (caar alist))
998 ;; Ignore IDs in the alist that are not being
999 ;; displayed in the summary.
1000 (setq alist (cdr alist)))
1002 ;; Headers that are not in the alist should be
1003 ;; fictious (see nnagent-retrieve-headers); they
1004 ;; imply that this article isn't in the agent.
1005 (gnus-agent-append-to-list tail-undownloaded h)
1006 (gnus-agent-append-to-list tail-unfetched h)
1007 (setq headers (cdr headers)))
1009 (setq alist (cdr alist))
1010 (setq headers (cdr headers))
1011 nil ; ignore already downloaded
1014 (setq alist (cdr alist))
1015 (setq headers (cdr headers))
1017 ;; This article isn't in the agent. Check to see
1018 ;; if it is in the cache. If it is, it's been
1020 (while (and cached (< (car cached) a))
1021 (setq cached (cdr cached)))
1022 (unless (equal a (car cached))
1023 (gnus-agent-append-to-list tail-undownloaded a))))))
1026 (let ((num (pop headers)))
1027 (gnus-agent-append-to-list tail-undownloaded num)
1028 (gnus-agent-append-to-list tail-unfetched num)))
1030 (setq gnus-newsgroup-undownloaded (cdr undownloaded)
1031 gnus-newsgroup-unfetched (cdr unfetched))))))
1033 (defun gnus-agent-catchup ()
1034 "Mark as read all unhandled articles.
1035 An article is unhandled if it is neither cached, nor downloaded, nor
1039 (let ((articles gnus-newsgroup-undownloaded))
1040 (when (or gnus-newsgroup-downloadable
1041 gnus-newsgroup-cached)
1042 (setq articles (gnus-sorted-ndifference
1043 (gnus-sorted-ndifference
1044 (gnus-copy-sequence articles)
1045 gnus-newsgroup-downloadable)
1046 gnus-newsgroup-cached)))
1049 (gnus-summary-mark-article
1050 (pop articles) gnus-catchup-mark)))
1051 (gnus-summary-position-point)))
1053 (defun gnus-agent-summary-fetch-series ()
1055 (when gnus-newsgroup-processable
1056 (setq gnus-newsgroup-downloadable
1057 (let* ((dl gnus-newsgroup-downloadable)
1058 (gnus-newsgroup-downloadable
1059 (sort (gnus-copy-sequence gnus-newsgroup-processable) '<))
1060 (fetched-articles (gnus-agent-summary-fetch-group)))
1061 ;; The preceeding call to (gnus-agent-summary-fetch-group)
1062 ;; updated gnus-newsgroup-downloadable to remove each
1063 ;; article successfully fetched.
1065 ;; For each article that I processed, remove its
1066 ;; processable mark IF the article is no longer
1067 ;; downloadable (i.e. it's already downloaded)
1068 (dolist (article gnus-newsgroup-processable)
1069 (unless (memq article gnus-newsgroup-downloadable)
1070 (gnus-summary-remove-process-mark article)))
1071 (gnus-sorted-ndifference dl fetched-articles)))))
1073 (defun gnus-agent-summary-fetch-group (&optional all)
1074 "Fetch the downloadable articles in the group.
1075 Optional arg ALL, if non-nil, means to fetch all articles."
1078 (if all gnus-newsgroup-articles
1079 gnus-newsgroup-downloadable))
1080 (gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name))
1082 (gnus-agent-while-plugged
1084 (error "No articles to download"))
1085 (gnus-agent-with-fetch
1086 (setq gnus-newsgroup-undownloaded
1087 (gnus-sorted-ndifference
1088 gnus-newsgroup-undownloaded
1089 (setq fetched-articles
1090 (gnus-agent-fetch-articles
1091 gnus-newsgroup-name articles)))))
1093 (dolist (article articles)
1094 (let ((was-marked-downloadable
1095 (memq article gnus-newsgroup-downloadable)))
1096 (cond (gnus-agent-mark-unread-after-downloaded
1097 (setq gnus-newsgroup-downloadable
1098 (delq article gnus-newsgroup-downloadable))
1100 (gnus-summary-mark-article article gnus-unread-mark))
1101 (was-marked-downloadable
1102 (gnus-summary-set-agent-mark article t)))
1103 (when (gnus-summary-goto-subject article nil t)
1104 (gnus-summary-update-download-mark article))))))
1107 (defun gnus-agent-fetch-selected-article ()
1108 "Fetch the current article as it is selected.
1109 This can be added to `gnus-select-article-hook' or
1110 `gnus-mark-article-hook'."
1111 (let ((gnus-command-method gnus-current-select-method))
1112 (when (and gnus-plugged (gnus-agent-method-p gnus-command-method))
1113 (when (gnus-agent-fetch-articles
1115 (list gnus-current-article))
1116 (setq gnus-newsgroup-undownloaded
1117 (delq gnus-current-article gnus-newsgroup-undownloaded))
1118 (gnus-summary-update-download-mark gnus-current-article)))))
1121 ;;; Internal functions
1124 (defun gnus-agent-save-active (method)
1125 (when (gnus-agent-method-p method)
1126 (let* ((gnus-command-method method)
1127 (new (gnus-make-hashtable (count-lines (point-min) (point-max))))
1128 (file (gnus-agent-lib-file "active")))
1129 (gnus-active-to-gnus-format nil new)
1130 (gnus-agent-write-active file new)
1132 (nnheader-insert-file-contents file))))
1134 (defun gnus-agent-write-active (file new)
1135 (gnus-make-directory (file-name-directory file))
1136 (let ((nnmail-active-file-coding-system gnus-agent-file-coding-system))
1137 ;; The hashtable contains real names of groups. However, do NOT
1138 ;; add the foreign server prefix as gnus-active-to-gnus-format
1139 ;; will add it while reading the file.
1140 (gnus-write-active-file file new nil)))
1142 (defun gnus-agent-possibly-alter-active (group active &optional info)
1143 "Possibly expand a group's active range to include articles
1144 downloaded into the agent."
1145 (let* ((gnus-command-method (or gnus-command-method
1146 (gnus-find-method-for-group group))))
1147 (when (gnus-agent-method-p gnus-command-method)
1148 (let* ((local (gnus-agent-get-local group))
1149 (active-min (or (car active) 0))
1150 (active-max (or (cdr active) 0))
1151 (agent-min (or (car local) active-min))
1152 (agent-max (or (cdr local) active-max)))
1154 (when (< agent-min active-min)
1155 (setcar active agent-min))
1157 (when (> agent-max active-max)
1158 (setcdr active agent-max))
1160 (when (and info (< agent-max (- active-min 100)))
1161 ;; I'm expanding the active range by such a large amount
1162 ;; that there is a gap of more than 100 articles between the
1163 ;; last article known to the agent and the first article
1164 ;; currently available on the server. This gap contains
1165 ;; articles that have been lost, mark them as read so that
1166 ;; gnus doesn't waste resources trying to fetch them.
1168 ;; NOTE: I don't do this for smaller gaps (< 100) as I don't
1169 ;; want to modify the local file everytime someone restarts
1170 ;; gnus. The small gap will cause a tiny performance hit
1171 ;; when gnus tries, and fails, to retrieve the articles.
1172 ;; Still that should be smaller than opening a buffer,
1173 ;; printing this list to the buffer, and then writing it to a
1176 (let ((read (gnus-info-read info)))
1181 (list (cons (1+ agent-max)
1182 (1- active-min))))))
1184 ;; Lie about the agent's local range for this group to
1185 ;; disable the set read each time this server is opened.
1186 ;; NOTE: Opening this group will restore the valid local
1187 ;; range but it will also expand the local range to
1188 ;; incompass the new active range.
1189 (gnus-agent-set-local group agent-min (1- active-min)))))))
1191 (defun gnus-agent-save-group-info (method group active)
1192 "Update a single group's active range in the agent's copy of the server's active file."
1193 (when (gnus-agent-method-p method)
1194 (let* ((gnus-command-method method)
1195 (coding-system-for-write nnheader-file-coding-system)
1196 (file-name-coding-system nnmail-pathname-coding-system)
1197 (file (gnus-agent-lib-file "active"))
1198 oactive-min oactive-max)
1199 (gnus-make-directory (file-name-directory file))
1200 (with-temp-file file
1201 ;; Emacs got problem to match non-ASCII group in multibyte buffer.
1202 (set-buffer-multibyte nil)
1203 (when (file-exists-p file)
1204 (nnheader-insert-file-contents file)
1206 (goto-char (point-min))
1207 (when (re-search-forward
1208 (concat "^" (regexp-quote group) " ") nil t)
1210 (setq oactive-max (read (current-buffer)) ;; max
1211 oactive-min (read (current-buffer)))) ;; min
1212 (gnus-delete-line)))
1213 (insert (format "%S %d %d y\n" (intern group)
1214 (max (or oactive-max (cdr active)) (cdr active))
1215 (min (or oactive-min (car active)) (car active))))
1216 (goto-char (point-max))
1217 (while (search-backward "\\." nil t)
1218 (delete-char 1))))))
1220 (defun gnus-agent-group-path (group)
1221 "Translate GROUP into a file name."
1223 ;; NOTE: This is what nnmail-group-pathname does as of Apr 2003.
1224 ;; The two methods must be kept synchronized, which is why
1225 ;; gnus-agent-group-pathname was added.
1228 (nnheader-translate-file-chars
1229 (nnheader-replace-duplicate-chars-in-string
1230 (nnheader-replace-chars-in-string
1231 (gnus-group-real-name group)
1234 (if (or nnmail-use-long-file-names
1235 (file-directory-p (expand-file-name group (gnus-agent-directory))))
1237 (mm-encode-coding-string
1238 (nnheader-replace-chars-in-string group ?. ?/)
1239 nnmail-pathname-coding-system)))
1241 (defun gnus-agent-group-pathname (group)
1242 "Translate GROUP into a file name."
1243 ;; nnagent uses nnmail-group-pathname to read articles while
1244 ;; unplugged. The agent must, therefore, use the same directory
1246 (let ((gnus-command-method (or gnus-command-method
1247 (gnus-find-method-for-group group))))
1248 (nnmail-group-pathname (gnus-group-real-name group) (gnus-agent-directory))))
1250 (defun gnus-agent-get-function (method)
1251 (if (gnus-online method)
1256 (defun gnus-agent-covered-methods ()
1257 "Return the subset of methods that are covered by the agent."
1258 (delq nil (mapcar #'gnus-server-to-method gnus-agent-covered-methods)))
1260 ;;; History functions
1262 (defun gnus-agent-history-buffer ()
1263 (cdr (assoc (gnus-agent-method) gnus-agent-history-buffers)))
1265 (defun gnus-agent-open-history ()
1267 (push (cons (gnus-agent-method)
1268 (set-buffer (gnus-get-buffer-create
1269 (format " *Gnus agent %s history*"
1270 (gnus-agent-method)))))
1271 gnus-agent-history-buffers)
1272 (set-buffer-multibyte nil) ;; everything is binary
1275 (let ((file (gnus-agent-lib-file "history")))
1276 (when (file-exists-p file)
1277 (nnheader-insert-file-contents file))
1278 (set (make-local-variable 'gnus-agent-file-name) file))))
1280 (defun gnus-agent-close-history ()
1281 (when (gnus-buffer-live-p gnus-agent-current-history)
1282 (kill-buffer gnus-agent-current-history)
1283 (setq gnus-agent-history-buffers
1284 (delq (assoc (gnus-agent-method) gnus-agent-history-buffers)
1285 gnus-agent-history-buffers))))
1291 (defun gnus-agent-fetch-articles (group articles)
1292 "Fetch ARTICLES from GROUP and put them into the Agent."
1294 (gnus-agent-load-alist group)
1295 (let* ((alist gnus-agent-article-alist)
1296 (headers (if (< (length articles) 2) nil gnus-newsgroup-headers))
1297 (selected-sets (list nil))
1298 (current-set-size 0)
1301 ;; Check each article
1302 (while (setq article (pop articles))
1303 ;; Skip alist entries preceeding this article
1304 (while (> article (or (caar alist) (1+ article)))
1305 (setq alist (cdr alist)))
1307 ;; Prune off articles that we have already fetched.
1308 (unless (and (eq article (caar alist))
1310 ;; Skip headers preceeding this article
1313 (let* ((header (car headers)))
1315 (mail-header-number header)
1317 (setq headers (cdr headers)))
1319 ;; Add this article to the current set
1320 (setcar selected-sets (cons article (car selected-sets)))
1322 ;; Update the set size, when the set is too large start a
1323 ;; new one. I do this after adding the article as I want at
1324 ;; least one article in each set.
1325 (when (< gnus-agent-max-fetch-size
1326 (setq current-set-size
1328 (if (= header-number article)
1329 (let ((char-size (mail-header-chars
1331 (if (<= char-size 0)
1332 ;; The char size was missing/invalid,
1333 ;; assume a worst-case situation of
1334 ;; 65 char/line. If the line count
1335 ;; is missing, arbitrarily assume a
1336 ;; size of 1000 characters.
1337 (max (* 65 (mail-header-lines
1342 (setcar selected-sets (nreverse (car selected-sets)))
1343 (setq selected-sets (cons nil selected-sets)
1344 current-set-size 0))))
1346 (when (or (cdr selected-sets) (car selected-sets))
1347 (let* ((fetched-articles (list nil))
1348 (tail-fetched-articles fetched-articles)
1349 (dir (gnus-agent-group-pathname group))
1350 (date (time-to-days (current-time)))
1351 (case-fold-search t)
1354 (setcar selected-sets (nreverse (car selected-sets)))
1355 (setq selected-sets (nreverse selected-sets))
1357 (gnus-make-directory dir)
1358 (gnus-message 7 "Fetching articles for %s..." group)
1361 (while (setq articles (pop selected-sets))
1362 ;; Fetch the articles from the backend.
1363 (if (gnus-check-backend-function 'retrieve-articles group)
1364 (setq pos (gnus-retrieve-articles articles group))
1367 (while (setq article (pop articles))
1368 (gnus-message 10 "Fetching article %s for %s..."
1371 (gnus-backlog-request-article group article
1373 (gnus-request-article article group))
1374 (goto-char (point-max))
1375 (push (cons article (point)) pos)
1376 (insert-buffer-substring nntp-server-buffer)))
1378 nntp-server-buffer (point-min) (point-max))
1379 (setq pos (nreverse pos)))))
1380 ;; Then save these articles into the Agent.
1382 (set-buffer nntp-server-buffer)
1384 (narrow-to-region (cdar pos) (or (cdadr pos) (point-max)))
1385 (goto-char (point-min))
1386 (unless (eobp) ;; Don't save empty articles.
1387 (when (search-forward "\n\n" nil t)
1388 (when (search-backward "\nXrefs: " nil t)
1389 ;; Handle cross posting.
1390 (goto-char (match-end 0)) ; move to end of header name
1391 (skip-chars-forward "^ ") ; skip server name
1392 (skip-chars-forward " ")
1394 (while (looking-at "\\([^: \n]+\\):\\([0-9]+\\) *")
1395 (push (cons (buffer-substring (match-beginning 1)
1398 (buffer-substring (match-beginning 2)
1401 (goto-char (match-end 0)))
1402 (gnus-agent-crosspost crosses (caar pos) date)))
1403 (goto-char (point-min))
1404 (if (not (re-search-forward
1405 "^Message-ID: *<\\([^>\n]+\\)>" nil t))
1406 (setq id "No-Message-ID-in-article")
1407 (setq id (buffer-substring
1408 (match-beginning 1) (match-end 1))))
1409 (write-region-as-coding-system
1410 gnus-agent-file-coding-system (point-min) (point-max)
1411 (concat dir (number-to-string (caar pos))) nil 'silent)
1413 (gnus-agent-append-to-list
1414 tail-fetched-articles (caar pos)))
1416 (setq pos (cdr pos)))))
1418 (gnus-agent-save-alist group (cdr fetched-articles) date)
1419 (gnus-message 7 ""))
1420 (cdr fetched-articles))))))
1422 (defun gnus-agent-crosspost (crosses article &optional date)
1423 (setq date (or date t))
1425 (let (gnus-agent-article-alist group alist beg end)
1427 (set-buffer gnus-agent-overview-buffer)
1428 (when (nnheader-find-nov-line article)
1431 (setq end (progn (forward-line 1) (point)))))
1433 (setq group (caar crosses))
1434 (unless (setq alist (assoc group gnus-agent-group-alist))
1435 (push (setq alist (list group (gnus-agent-load-alist (caar crosses))))
1436 gnus-agent-group-alist))
1437 (setcdr alist (cons (cons (cdar crosses) date) (cdr alist)))
1439 (set-buffer (gnus-get-buffer-create (format " *Gnus agent overview %s*"
1441 (when (= (point-max) (point-min))
1442 (push (cons group (current-buffer)) gnus-agent-buffer-alist)
1444 (nnheader-insert-file-contents
1445 (gnus-agent-article-name ".overview" group))))
1446 (nnheader-find-nov-line (string-to-number (cdar crosses)))
1447 (insert (string-to-number (cdar crosses)))
1448 (insert-buffer-substring gnus-agent-overview-buffer beg end)
1449 (gnus-agent-check-overview-buffer))
1450 (setq crosses (cdr crosses)))))
1452 (defun gnus-agent-backup-overview-buffer ()
1453 (when gnus-newsgroup-name
1454 (let ((root (gnus-agent-article-name ".overview" gnus-newsgroup-name))
1457 (while (file-exists-p
1458 (setq name (concat root "~"
1459 (int-to-string (setq cnt (1+ cnt))) "~"))))
1460 (write-region (point-min) (point-max) name nil 'no-msg)
1461 (gnus-message 1 "Created backup copy of overview in %s." name)))
1464 (defun gnus-agent-check-overview-buffer (&optional buffer)
1465 "Check the overview file given for sanity.
1466 In particular, checks that the file is sorted by article number
1467 and that there are no duplicates."
1472 (set-buffer buffer))
1475 (goto-char (point-min))
1477 (while (< (point) (point-max))
1479 (cur (condition-case nil
1480 (read (current-buffer))
1483 ((or (not (integerp cur))
1484 (not (eq (char-after) ?\t)))
1486 (setq backed-up (gnus-agent-backup-overview-buffer)))
1488 "Overview buffer contains garbage '%s'."
1493 (setq backed-up (gnus-agent-backup-overview-buffer)))
1495 "Duplicate overview line for %d" cur)
1496 (delete-region (point) (progn (forward-line 1) (point))))
1499 (setq backed-up (gnus-agent-backup-overview-buffer)))
1500 (gnus-message 1 "Overview buffer not sorted!")
1501 (sort-numeric-fields 1 (point-min) (point-max))
1502 (goto-char (point-min))
1505 (setq prev-num cur)))
1506 (forward-line 1)))))))
1508 (defun gnus-agent-flush-cache ()
1510 (while gnus-agent-buffer-alist
1511 (set-buffer (cdar gnus-agent-buffer-alist))
1512 (write-region-as-coding-system
1513 gnus-agent-file-coding-system
1514 (point-min) (point-max)
1515 (gnus-agent-article-name ".overview"
1516 (caar gnus-agent-buffer-alist))
1518 (setq gnus-agent-buffer-alist (cdr gnus-agent-buffer-alist)))
1519 (while gnus-agent-group-alist
1520 (with-temp-file (gnus-agent-article-name
1521 ".agentview" (caar gnus-agent-group-alist))
1522 (princ (cdar gnus-agent-group-alist))
1524 (princ 1 (current-buffer))
1526 (setq gnus-agent-group-alist (cdr gnus-agent-group-alist)))))
1528 (defun gnus-agent-find-parameter (group symbol)
1529 "Search for GROUPs SYMBOL in the group's parameters, the group's
1530 topic parameters, the group's category, or the customizable
1531 variables. Returns the first non-nil value found."
1532 (or (gnus-group-find-parameter group symbol t)
1533 (gnus-group-parameter-value (cdr (gnus-group-category group)) symbol t)
1537 '((agent-short-article . gnus-agent-short-article)
1538 (agent-long-article . gnus-agent-long-article)
1539 (agent-low-score . gnus-agent-low-score)
1540 (agent-high-score . gnus-agent-high-score)
1541 (agent-days-until-old . gnus-agent-expire-days)
1542 (agent-enable-expiration
1543 . gnus-agent-enable-expiration)
1544 (agent-predicate . gnus-agent-predicate)))))))
1546 (defun gnus-agent-fetch-headers (group &optional force)
1547 "Fetch interesting headers into the agent. The group's overview
1548 file will be updated to include the headers while a list of available
1549 article numbers will be returned."
1550 (let* ((fetch-all (and gnus-agent-consider-all-articles
1551 ;; Do not fetch all headers if the predicate
1552 ;; implies that we only consider unread articles.
1553 (not (gnus-predicate-implies-unread
1554 (gnus-agent-find-parameter group
1555 'agent-predicate)))))
1556 (articles (if fetch-all
1557 (gnus-uncompress-range (gnus-active group))
1558 (gnus-list-of-unread-articles group)))
1559 (gnus-decode-encoded-word-function 'identity)
1560 (file (gnus-agent-article-name ".overview" group)))
1561 ;; Check whether the number of articles is not too large.
1562 (when (and (integerp gnus-agent-large-newsgroup)
1563 (> gnus-agent-large-newsgroup 0))
1564 (setq articles (nthcdr (max (- (length articles)
1565 gnus-agent-large-newsgroup)
1569 ;; Add articles with marks to the list of article headers we want to
1570 ;; fetch. Don't fetch articles solely on the basis of a recent or seen
1571 ;; mark, but do fetch recent or seen articles if they have other, more
1572 ;; interesting marks. (We have to fetch articles with boring marks
1573 ;; because otherwise the agent will remove their marks.)
1574 (dolist (arts (gnus-info-marks (gnus-get-info group)))
1575 (unless (memq (car arts) '(seen recent killed cache))
1576 (setq articles (gnus-range-add articles (cdr arts)))))
1577 (setq articles (sort (gnus-uncompress-sequence articles) '<)))
1579 ;; At this point, I have the list of articles to consider for
1580 ;; fetching. This is the list that I'll return to my caller. Some
1581 ;; of these articles may have already been fetched. That's OK as
1582 ;; the fetch article code will filter those out. Internally, I'll
1583 ;; filter this list to just those articles whose headers need to
1585 (let ((articles articles))
1586 ;; Remove known articles.
1587 (when (and (or gnus-agent-cache
1589 (gnus-agent-load-alist group))
1590 ;; Remove articles marked as downloaded.
1592 ;; I want to fetch all headers in the active range.
1593 ;; Therefore, exclude only those headers that are in the
1595 ;; NOTE: This is probably NOT what I want to do after
1596 ;; agent expiration in this group.
1597 (setq articles (gnus-agent-uncached-articles articles group))
1599 ;; I want to only fetch those headers that have never been
1600 ;; fetched. Therefore, exclude all headers that are, or
1601 ;; WERE, in the article alist.
1602 (let ((low (1+ (caar (last gnus-agent-article-alist))))
1603 (high (cdr (gnus-active group))))
1604 ;; Low can be greater than High when the same group is
1605 ;; fetched twice in the same session {The first fetch will
1606 ;; fill the article alist such that (last
1607 ;; gnus-agent-article-alist) equals (cdr (gnus-active
1608 ;; group))}. The addition of one(the 1+ above) then
1609 ;; forces Low to be greater than High. When this happens,
1610 ;; gnus-list-range-intersection returns nil which
1611 ;; indicates that no headers need to be fetched. -- Kevin
1612 (setq articles (gnus-list-range-intersection
1613 articles (list (cons low high)))))))
1616 10 "gnus-agent-fetch-headers: undownloaded articles are '%s'"
1617 (gnus-compress-sequence articles t))
1620 (set-buffer nntp-server-buffer)
1624 (gnus-message 7 "Fetching headers for %s..." group)
1627 (gnus-make-directory (nnheader-translate-file-chars
1628 (file-name-directory file) t))
1630 (unless (eq 'nov (gnus-retrieve-headers articles group))
1631 (nnvirtual-convert-headers))
1632 (gnus-agent-check-overview-buffer)
1633 ;; Move these headers to the overview buffer so that
1634 ;; gnus-agent-braid-nov can merge them with the contents
1637 gnus-agent-overview-buffer (point-min) (point-max))
1638 (when (file-exists-p file)
1639 (gnus-agent-braid-nov group articles file))
1640 (gnus-agent-check-overview-buffer)
1641 (write-region-as-coding-system
1642 gnus-agent-file-coding-system
1643 (point-min) (point-max) file nil 'silent)
1644 (gnus-agent-save-alist group articles nil)
1648 (nnheader-insert-file-contents file)))))
1651 (defsubst gnus-agent-copy-nov-line (article)
1653 (set-buffer gnus-agent-overview-buffer)
1654 (while (and (not (eobp))
1655 (< (setq art (read (current-buffer))) article))
1659 (not (eq article art)))
1660 (set-buffer nntp-server-buffer)
1662 (setq e (progn (forward-line 1) (point)))
1663 (set-buffer nntp-server-buffer)
1664 (insert-buffer-substring gnus-agent-overview-buffer b e))))
1666 (defun gnus-agent-braid-nov (group articles file)
1667 "Merge agent overview data with given file.
1668 Takes headers for ARTICLES from `gnus-agent-overview-buffer' and the given
1669 FILE and places the combined headers into `nntp-server-buffer'."
1671 (set-buffer gnus-agent-overview-buffer)
1672 (goto-char (point-min))
1673 (set-buffer nntp-server-buffer)
1675 (nnheader-insert-file-contents file)
1676 (goto-char (point-max))
1678 (unless (looking-at "[0-9]+\t")
1679 ;; Remove corrupted lines
1681 1 "Overview %s is corrupted. Removing corrupted lines..." file)
1682 (goto-char (point-min))
1684 (if (looking-at "[0-9]+\t")
1686 (delete-region (point) (progn (forward-line 1) (point)))))
1688 (unless (or (= (point-min) (point-max))
1689 (< (setq last (read (current-buffer))) (car articles)))
1690 ;; We do it the hard way.
1691 (when (nnheader-find-nov-line (car articles))
1692 ;; Replacing existing NOV entry
1693 (delete-region (point) (progn (forward-line 1) (point))))
1694 (gnus-agent-copy-nov-line (pop articles))
1698 (while (let ((art (read (current-buffer))))
1699 (cond ((< art (car articles))
1702 ((= art (car articles))
1705 (point) (progn (forward-line 1) (point)))
1711 (gnus-agent-copy-nov-line (pop articles)))))
1713 ;; Copy the rest lines
1714 (set-buffer nntp-server-buffer)
1715 (goto-char (point-max))
1718 (set-buffer gnus-agent-overview-buffer)
1720 (while (<= (read (current-buffer)) last)
1723 (setq start (point))
1724 (set-buffer nntp-server-buffer))
1725 (insert-buffer-substring gnus-agent-overview-buffer start))))
1727 ;; Keeps the compiler from warning about the free variable in
1728 ;; gnus-agent-read-agentview.
1730 (defvar gnus-agent-read-agentview))
1732 (defun gnus-agent-load-alist (group)
1733 "Load the article-state alist for GROUP."
1734 ;; Bind free variable that's used in `gnus-agent-read-agentview'.
1735 (let ((gnus-agent-read-agentview group))
1736 (setq gnus-agent-article-alist
1737 (gnus-cache-file-contents
1738 (gnus-agent-article-name ".agentview" group)
1739 'gnus-agent-file-loading-cache
1740 'gnus-agent-read-agentview))))
1742 ;; Save format may be either 1 or 2. Two is the new, compressed
1743 ;; format that is still being tested. Format 1 is uncompressed but
1744 ;; known to be reliable.
1745 (defconst gnus-agent-article-alist-save-format 2)
1747 (defun gnus-agent-read-agentview (file)
1748 "Load FILE and do a `read' there."
1751 (nnheader-insert-file-contents file)
1752 (goto-char (point-min))
1753 (let ((alist (read (current-buffer)))
1754 (version (condition-case nil (read (current-buffer))
1760 (let ((inhibit-quit t)
1762 (gnus-agent-open-history)
1763 (set-buffer (gnus-agent-history-buffer))
1764 (goto-char (point-min))
1766 (if (and (looking-at
1767 "[^\t\n]+\t\\([0-9]+\\)\t\\([^ \n]+\\) \\([0-9]+\\)")
1768 (string= (match-string 2)
1769 gnus-agent-read-agentview)
1770 (setq entry (assoc (string-to-number (match-string 3)) alist)))
1771 (setcdr entry (string-to-number (match-string 1))))
1773 (gnus-agent-close-history)
1774 (setq changed-version t)))
1776 (setq changed-version (not (= 1 gnus-agent-article-alist-save-format))))
1781 (let ((state (car comp-list))
1782 (sequence (gnus-uncompress-sequence
1784 (mapcar (lambda (article-id)
1785 (setq uncomp (cons (cons article-id state) uncomp)))
1788 (setq alist (sort uncomp 'car-less-than-car)))))
1789 (when changed-version
1790 (let ((gnus-agent-article-alist alist))
1791 (gnus-agent-save-alist gnus-agent-read-agentview)))
1794 (defun gnus-agent-save-alist (group &optional articles state)
1795 "Save the article-state alist for GROUP."
1796 (let* ((file-name-coding-system nnmail-pathname-coding-system)
1797 (prev (cons nil gnus-agent-article-alist))
1799 print-level print-length item article)
1800 (while (setq article (pop articles))
1801 (while (and (cdr prev)
1802 (< (caadr prev) article))
1803 (setq prev (cdr prev)))
1806 (setcdr prev (list (cons article state))))
1807 ((> (caadr prev) article)
1808 (setcdr prev (cons (cons article state) (cdr prev))))
1809 ((= (caadr prev) article)
1810 (setcdr (cadr prev) state)))
1811 (setq prev (cdr prev)))
1812 (setq gnus-agent-article-alist (cdr all))
1814 (gnus-agent-set-local group
1815 (caar gnus-agent-article-alist)
1816 (caar (last gnus-agent-article-alist)))
1818 (gnus-make-directory (gnus-agent-article-name "" group))
1819 (with-temp-file (gnus-agent-article-name ".agentview" group)
1820 (cond ((eq gnus-agent-article-alist-save-format 1)
1821 (princ gnus-agent-article-alist (current-buffer)))
1822 ((eq gnus-agent-article-alist-save-format 2)
1823 (let ((compressed nil))
1824 (mapcar (lambda (pair)
1825 (let* ((article-id (car pair))
1826 (day-of-download (cdr pair))
1827 (comp-list (assq day-of-download compressed)))
1830 (cons article-id (cdr comp-list)))
1832 (cons (list day-of-download article-id)
1834 nil)) gnus-agent-article-alist)
1835 (mapcar (lambda (comp-list)
1837 (gnus-compress-sequence
1838 (nreverse (cdr comp-list)))))
1840 (princ compressed (current-buffer)))))
1842 (princ gnus-agent-article-alist-save-format (current-buffer))
1845 (defvar gnus-agent-article-local nil)
1846 (defvar gnus-agent-file-loading-local nil)
1848 (defun gnus-agent-load-local (&optional method)
1849 "Load the METHOD'S local file. The local file contains min/max
1850 article counts for each of the method's subscribed groups."
1851 (let ((gnus-command-method (or method gnus-command-method)))
1852 (setq gnus-agent-article-local
1853 (gnus-cache-file-contents
1854 (gnus-agent-lib-file "local")
1855 'gnus-agent-file-loading-local
1856 'gnus-agent-read-and-cache-local))))
1858 (defun gnus-agent-read-and-cache-local (file)
1859 "Load and read FILE then bind its contents to
1860 gnus-agent-article-local. If that variable had `dirty' (also known as
1861 modified) original contents, they are first saved to their own file."
1863 (if (and gnus-agent-article-local
1864 (symbol-value (intern "+dirty" gnus-agent-article-local)))
1865 (gnus-agent-save-local))
1866 (gnus-agent-read-local file))
1868 (defun gnus-agent-read-local (file)
1869 "Load FILE and do a `read' there."
1870 (let ((my-obarray (gnus-make-hashtable (count-lines (point-min)
1875 (nnheader-insert-file-contents file)
1878 (goto-char (point-min))
1879 ;; Skip any comments at the beginning of the file (the only place where they may appear)
1880 (while (= (following-char) ?\;)
1882 (setq line (1+ line)))
1889 (cur (current-buffer)))
1890 (setq group (read cur)
1894 (when (stringp group)
1895 (setq group (intern group my-obarray)))
1897 ;; NOTE: The '+ 0' ensure that min and max are both numerics.
1898 (set group (cons (+ 0 min) (+ 0 max))))
1900 (gnus-message 3 "Warning - invalid agent local: %s on line %d: "
1901 file line (error-message-string err))))
1903 (setq line (1+ line))))
1905 (set (intern "+dirty" my-obarray) nil)
1906 (set (intern "+method" my-obarray) gnus-command-method)
1909 (defun gnus-agent-save-local (&optional force)
1910 "Save gnus-agent-article-local under it method's agent.lib directory."
1911 (let ((my-obarray gnus-agent-article-local))
1912 (when (and my-obarray
1913 (or force (symbol-value (intern "+dirty" my-obarray))))
1914 (let* ((gnus-command-method (symbol-value (intern "+method" my-obarray)))
1915 ;; NOTE: gnus-command-method is used within gnus-agent-lib-file.
1916 (dest (gnus-agent-lib-file "local")))
1917 (gnus-make-directory (gnus-agent-lib-file ""))
1918 (with-temp-file dest
1919 (let ((gnus-command-method (symbol-value (intern "+method" my-obarray)))
1920 (file-name-coding-system nnmail-pathname-coding-system)
1921 (coding-system-for-write
1922 gnus-agent-file-coding-system)
1923 print-level print-length item article
1924 (standard-output (current-buffer)))
1925 (mapatoms (lambda (symbol)
1926 (cond ((not (boundp symbol))
1928 ((member (symbol-name symbol) '("+dirty" "+method"))
1932 (let ((range (symbol-value symbol)))
1940 (defun gnus-agent-get-local (group)
1941 (let* ((gmane (gnus-group-real-name group))
1942 (gnus-command-method (gnus-find-method-for-group group))
1943 (local (gnus-agent-load-local))
1944 (symb (intern gmane local))
1945 (minmax (and (boundp symb) (symbol-value symb))))
1947 ;; Bind these so that gnus-agent-load-alist doesn't change the
1948 ;; current alist (i.e. gnus-agent-article-alist)
1949 (let* ((gnus-agent-article-alist gnus-agent-article-alist)
1950 (gnus-agent-file-loading-cache gnus-agent-file-loading-cache)
1951 (alist (gnus-agent-load-alist group)))
1955 (caar (last alist))))
1956 (gnus-agent-set-local group (car minmax) (cdr minmax)
1957 gmane gnus-command-method local))))
1960 (defun gnus-agent-set-local (group min max &optional gmane method local)
1961 (let* ((gmane (or gmane (gnus-group-real-name group)))
1962 (gnus-command-method (or method (gnus-find-method-for-group group)))
1963 (local (or local (gnus-agent-load-local)))
1964 (symb (intern gmane local))
1965 (minmax (and (boundp symb) (symbol-value symb))))
1967 (if (cond ((and minmax
1968 (or (not (eq min (car minmax)))
1969 (not (eq max (cdr minmax)))))
1976 (set symb (cons min max))
1978 (set (intern "+dirty" local) t))))
1980 (defun gnus-agent-article-name (article group)
1981 (expand-file-name article
1982 (file-name-as-directory
1983 (gnus-agent-group-pathname group))))
1985 (defun gnus-agent-batch-confirmation (msg)
1986 "Show error message and return t."
1987 (gnus-message 1 msg)
1991 (defun gnus-agent-batch-fetch ()
1992 "Start Gnus and fetch session."
1995 (let ((gnus-agent-confirmation-function 'gnus-agent-batch-confirmation))
1996 (gnus-agent-fetch-session))
1999 (defun gnus-agent-fetch-session ()
2000 "Fetch all articles and headers that are eligible for fetching."
2002 (unless gnus-agent-covered-methods
2003 (error "No servers are covered by the Gnus agent"))
2004 (unless gnus-plugged
2005 (error "Can't fetch articles while Gnus is unplugged"))
2006 (let ((methods (gnus-agent-covered-methods))
2007 groups group gnus-command-method)
2010 (setq gnus-command-method (car methods))
2011 (when (and (or (gnus-server-opened gnus-command-method)
2012 (gnus-open-server gnus-command-method))
2013 (gnus-online gnus-command-method))
2014 (setq groups (gnus-groups-from-server (car methods)))
2015 (gnus-agent-with-fetch
2016 (while (setq group (pop groups))
2017 (when (<= (gnus-group-level group)
2018 gnus-agent-handle-level)
2019 (if (or debug-on-error debug-on-quit)
2020 (gnus-agent-fetch-group-1
2021 group gnus-command-method)
2023 (gnus-agent-fetch-group-1
2024 group gnus-command-method)
2026 (unless (funcall gnus-agent-confirmation-function
2027 (format "Error %s. Continue? "
2028 (error-message-string err)))
2029 (error "Cannot fetch articles into the Gnus agent")))
2031 (unless (funcall gnus-agent-confirmation-function
2033 "Quit fetching session %s. Continue? "
2034 (error-message-string err)))
2036 "Cannot fetch articles into the Gnus agent")))))))))
2037 (setq methods (cdr methods)))
2038 (gnus-run-hooks 'gnus-agent-fetched-hook)
2039 (gnus-message 6 "Finished fetching articles into the Gnus agent"))))
2041 (defun gnus-agent-fetch-group-1 (group method)
2043 (let ((gnus-command-method method)
2044 (gnus-newsgroup-name group)
2045 (gnus-newsgroup-dependencies gnus-newsgroup-dependencies)
2046 (gnus-newsgroup-headers gnus-newsgroup-headers)
2047 (gnus-newsgroup-scored gnus-newsgroup-scored)
2048 (gnus-use-cache gnus-use-cache)
2049 (gnus-summary-expunge-below gnus-summary-expunge-below)
2050 (gnus-summary-mark-below gnus-summary-mark-below)
2051 (gnus-orphan-score gnus-orphan-score)
2052 ;; Maybe some other gnus-summary local variables should also
2058 category predicate info marks score-param
2060 (unless (gnus-check-group group)
2061 (error "Can't open server for %s" group))
2064 (when (or gnus-newsgroup-active
2066 (gnus-activate-group group))
2067 (let ((marked-articles gnus-newsgroup-downloadable))
2068 ;; Identify the articles marked for download
2069 (unless gnus-newsgroup-active
2070 ;; The variable gnus-newsgroup-active was selected as I need
2071 ;; a gnus-summary local variable that is NOT bound to any
2072 ;; value (its global value should default to nil).
2073 (dolist (mark gnus-agent-download-marks)
2074 (let ((arts (cdr (assq mark (gnus-info-marks
2075 (setq info (gnus-get-info group)))))))
2077 (setq marked-articles (nconc (gnus-uncompress-range arts)
2080 (setq marked-articles (sort marked-articles '<))
2082 ;; Fetch any new articles from the server
2083 (setq articles (gnus-agent-fetch-headers group))
2085 ;; Merge new articles with marked
2086 (setq articles (sort (append marked-articles articles) '<))
2089 ;; Parse them and see which articles we want to fetch.
2090 (setq gnus-newsgroup-dependencies
2091 (or gnus-newsgroup-dependencies
2092 (make-vector (length articles) 0)))
2093 (setq gnus-newsgroup-headers
2094 (or gnus-newsgroup-headers
2095 (gnus-get-newsgroup-headers-xover articles nil nil
2097 ;; `gnus-agent-overview-buffer' may be killed for
2098 ;; timeout reason. If so, recreate it.
2099 (gnus-agent-create-buffer)
2101 ;; Figure out how to select articles in this group
2102 (setq category (gnus-group-category group))
2106 (gnus-agent-find-parameter group 'agent-predicate)))
2108 ;; If the selection predicate requires scoring, score each header
2109 (unless (memq predicate '(gnus-agent-true gnus-agent-false))
2111 (gnus-agent-find-parameter group 'agent-score-file)))
2112 ;; Translate score-param into real one
2115 ((eq score-param 'file)
2116 (setq score-param (gnus-all-score-files group)))
2117 ((stringp (car score-param)))
2119 (setq score-param (list (list score-param)))))
2121 (gnus-score-headers score-param))))
2123 (unless (and (eq predicate 'gnus-agent-false)
2124 (not marked-articles))
2125 (let ((arts (list nil)))
2126 (let ((arts-tail arts)
2127 (alist (gnus-agent-load-alist group))
2128 (marked-articles marked-articles)
2129 (gnus-newsgroup-headers gnus-newsgroup-headers))
2130 (while (setq gnus-headers (pop gnus-newsgroup-headers))
2131 (let ((num (mail-header-number gnus-headers)))
2132 ;; Determine if this article is already in the cache
2134 (> num (caar alist)))
2135 (setq alist (cdr alist)))
2137 (unless (and (eq num (caar alist))
2140 ;; Determine if this article was marked for download.
2141 (while (and marked-articles
2142 (> num (car marked-articles)))
2143 (setq marked-articles
2144 (cdr marked-articles)))
2146 ;; When this article is marked, or selected by the
2147 ;; predicate, add it to the download list
2148 (when (or (eq num (car marked-articles))
2151 (assq num gnus-newsgroup-scored))
2152 gnus-summary-default-score))
2153 (gnus-agent-long-article
2154 (gnus-agent-find-parameter
2155 group 'agent-long-article))
2156 (gnus-agent-short-article
2157 (gnus-agent-find-parameter
2158 group 'agent-short-article))
2159 (gnus-agent-low-score
2160 (gnus-agent-find-parameter
2161 group 'agent-low-score))
2162 (gnus-agent-high-score
2163 (gnus-agent-find-parameter
2164 group 'agent-high-score))
2165 (gnus-agent-expire-days
2166 (gnus-agent-find-parameter
2167 group 'agent-days-until-old)))
2168 (funcall predicate)))
2169 (gnus-agent-append-to-list arts-tail num))))))
2171 (let (fetched-articles)
2172 ;; Fetch all selected articles
2173 (setq gnus-newsgroup-undownloaded
2174 (gnus-sorted-ndifference
2175 gnus-newsgroup-undownloaded
2176 (setq fetched-articles
2178 (gnus-agent-fetch-articles group (cdr arts))
2181 (let ((unfetched-articles
2182 (gnus-sorted-ndifference (cdr arts) fetched-articles)))
2183 (if gnus-newsgroup-active
2184 ;; Update the summary buffer
2186 (dolist (article marked-articles)
2187 (gnus-summary-set-agent-mark article t))
2188 (dolist (article fetched-articles)
2189 (if gnus-agent-mark-unread-after-downloaded
2190 (gnus-summary-mark-article
2191 article gnus-unread-mark))
2192 (when (gnus-summary-goto-subject article nil t)
2193 (gnus-summary-update-download-mark article)))
2194 (dolist (article unfetched-articles)
2195 (gnus-summary-mark-article
2196 article gnus-canceled-mark)))
2198 ;; Update the group buffer.
2200 ;; When some, or all, of the marked articles came
2201 ;; from the download mark. Remove that mark. I
2202 ;; didn't do this earlier as I only want to remove
2203 ;; the marks after the fetch is completed.
2205 (dolist (mark gnus-agent-download-marks)
2206 (when (eq mark 'download)
2208 (assq mark (gnus-info-marks
2209 (setq info (gnus-get-info group))))))
2210 (when (cdr marked-arts)
2212 (delq marked-arts (gnus-info-marks info)))
2213 (gnus-info-set-marks info marks)))))
2214 (let ((read (gnus-info-read
2215 (or info (setq info (gnus-get-info group))))))
2217 info (gnus-add-to-range read unfetched-articles)))
2219 (gnus-group-update-group group t)
2223 (concat "(gnus-group-set-info '"
2224 (gnus-prin1-to-string info)
2228 ;;; Agent Category Mode
2231 (defvar gnus-category-mode-hook nil
2232 "Hook run in `gnus-category-mode' buffers.")
2234 (defvar gnus-category-line-format " %(%20c%): %g\n"
2235 "Format of category lines.
2237 Valid specifiers include:
2238 %c Topic name (string)
2239 %g The number of groups in the topic (integer)
2241 General format specifiers can also be used. See Info node
2242 `(gnus)Formatting Variables'.")
2244 (defvar gnus-category-mode-line-format "Gnus: %%b"
2245 "The format specification for the category mode line.")
2247 (defvar gnus-agent-predicate 'false
2248 "The selection predicate used when no other source is available.")
2250 (defvar gnus-agent-short-article 100
2251 "Articles that have fewer lines than this are short.")
2253 (defvar gnus-agent-long-article 200
2254 "Articles that have more lines than this are long.")
2256 (defvar gnus-agent-low-score 0
2257 "Articles that have a score lower than this have a low score.")
2259 (defvar gnus-agent-high-score 0
2260 "Articles that have a score higher than this have a high score.")
2263 ;;; Internal variables.
2265 (defvar gnus-category-buffer "*Agent Category*")
2267 (defvar gnus-category-line-format-alist
2268 `((?c gnus-tmp-name ?s)
2269 (?g gnus-tmp-groups ?d)))
2271 (defvar gnus-category-mode-line-format-alist
2272 `((?u user-defined ?s)))
2274 (defvar gnus-category-line-format-spec nil)
2275 (defvar gnus-category-mode-line-format-spec nil)
2277 (defvar gnus-category-mode-map nil)
2278 (put 'gnus-category-mode 'mode-class 'special)
2280 (unless gnus-category-mode-map
2281 (setq gnus-category-mode-map (make-sparse-keymap))
2282 (suppress-keymap gnus-category-mode-map)
2284 (gnus-define-keys gnus-category-mode-map
2285 "q" gnus-category-exit
2286 "k" gnus-category-kill
2287 "c" gnus-category-copy
2288 "a" gnus-category-add
2289 "e" gnus-agent-customize-category
2290 "p" gnus-category-edit-predicate
2291 "g" gnus-category-edit-groups
2292 "s" gnus-category-edit-score
2293 "l" gnus-category-list
2295 "\C-c\C-i" gnus-info-find-node
2296 "\C-c\C-b" gnus-bug))
2298 (defvar gnus-category-menu-hook nil
2299 "*Hook run after the creation of the menu.")
2301 (defun gnus-category-make-menu-bar ()
2302 (gnus-turn-off-edit-menu 'category)
2303 (unless (boundp 'gnus-category-menu)
2305 gnus-category-menu gnus-category-mode-map ""
2307 ["Add" gnus-category-add t]
2308 ["Kill" gnus-category-kill t]
2309 ["Copy" gnus-category-copy t]
2310 ["Edit category" gnus-agent-customize-category t]
2311 ["Edit predicate" gnus-category-edit-predicate t]
2312 ["Edit score" gnus-category-edit-score t]
2313 ["Edit groups" gnus-category-edit-groups t]
2314 ["Exit" gnus-category-exit t]))
2316 (gnus-run-hooks 'gnus-category-menu-hook)))
2318 (defun gnus-category-mode ()
2319 "Major mode for listing and editing agent categories.
2321 All normal editing commands are switched off.
2322 \\<gnus-category-mode-map>
2323 For more in-depth information on this mode, read the manual
2324 \(`\\[gnus-info-find-node]').
2326 The following commands are available:
2328 \\{gnus-category-mode-map}"
2330 (when (gnus-visual-p 'category-menu 'menu)
2331 (gnus-category-make-menu-bar))
2332 (kill-all-local-variables)
2333 (gnus-simplify-mode-line)
2334 (setq major-mode 'gnus-category-mode)
2335 (setq mode-name "Category")
2336 (gnus-set-default-directory)
2337 (setq mode-line-process nil)
2338 (use-local-map gnus-category-mode-map)
2339 (buffer-disable-undo)
2340 (setq truncate-lines t)
2341 (setq buffer-read-only t)
2342 (gnus-run-hooks 'gnus-category-mode-hook))
2344 (defalias 'gnus-category-position-point 'gnus-goto-colon)
2346 (defun gnus-category-insert-line (category)
2347 (let* ((gnus-tmp-name (format "%s" (car category)))
2348 (gnus-tmp-groups (length (gnus-agent-cat-groups category))))
2350 (gnus-add-text-properties
2354 (eval gnus-category-line-format-spec))
2355 (list 'gnus-category gnus-tmp-name))))
2357 (defun gnus-enter-category-buffer ()
2358 "Go to the Category buffer."
2360 (gnus-category-setup-buffer)
2361 (gnus-configure-windows 'category)
2362 (gnus-category-prepare))
2364 (defun gnus-category-setup-buffer ()
2365 (unless (get-buffer gnus-category-buffer)
2367 (set-buffer (gnus-get-buffer-create gnus-category-buffer))
2368 (gnus-category-mode))))
2370 (defun gnus-category-prepare ()
2371 (gnus-set-format 'category-mode)
2372 (gnus-set-format 'category t)
2373 (let ((alist gnus-category-alist)
2374 (buffer-read-only nil))
2377 (gnus-category-insert-line (pop alist)))
2378 (goto-char (point-min))
2379 (gnus-category-position-point)))
2381 (defun gnus-category-name ()
2382 (or (intern (get-text-property (point-at-bol) 'gnus-category))
2383 (error "No category on the current line")))
2385 (defun gnus-category-read ()
2386 "Read the category alist."
2387 (setq gnus-category-alist
2391 (nnheader-insert-file-contents (nnheader-concat gnus-agent-directory "lib/categories"))
2392 (goto-char (point-min))
2393 ;; This code isn't temp, it will be needed so long as
2394 ;; anyone may be migrating from an older version.
2396 ;; Once we're certain that people will not revert to an
2397 ;; earlier version, we can take out the old-list code in
2398 ;; gnus-category-write.
2399 (let* ((old-list (read (current-buffer)))
2400 (new-list (ignore-errors (read (current-buffer)))))
2403 ;; Convert from a positional list to an alist.
2413 '(agent-predicate agent-score-file agent-groups))))
2416 (list (gnus-agent-cat-make 'default 'short)))))
2418 (defun gnus-category-write ()
2419 "Write the category alist."
2420 (setq gnus-category-predicate-cache nil
2421 gnus-category-group-cache nil)
2422 (gnus-make-directory (nnheader-concat gnus-agent-directory "lib"))
2423 (with-temp-file (nnheader-concat gnus-agent-directory "lib/categories")
2424 ;; This prin1 is temporary. It exists so that people can revert
2425 ;; to an earlier version of gnus-agent.
2426 (prin1 (mapcar (lambda (c)
2428 (cdr (assoc 'agent-predicate c))
2429 (cdr (assoc 'agent-score-file c))
2430 (cdr (assoc 'agent-groups c))))
2431 gnus-category-alist)
2434 (prin1 gnus-category-alist (current-buffer))))
2436 (defun gnus-category-edit-predicate (category)
2437 "Edit the predicate for CATEGORY."
2438 (interactive (list (gnus-category-name)))
2439 (let ((info (assq category gnus-category-alist)))
2441 (gnus-agent-cat-predicate info)
2442 (format "Editing the select predicate for category %s" category)
2443 `(lambda (predicate)
2444 ;; Avoid run-time execution of setf form
2445 ;; (setf (gnus-agent-cat-predicate (assq ',category gnus-category-alist))
2447 ;; use its expansion instead:
2448 (gnus-agent-cat-set-property (assq ',category gnus-category-alist)
2449 'agent-predicate predicate)
2451 (gnus-category-write)
2452 (gnus-category-list)))))
2454 (defun gnus-category-edit-score (category)
2455 "Edit the score expression for CATEGORY."
2456 (interactive (list (gnus-category-name)))
2457 (let ((info (assq category gnus-category-alist)))
2459 (gnus-agent-cat-score-file info)
2460 (format "Editing the score expression for category %s" category)
2461 `(lambda (score-file)
2462 ;; Avoid run-time execution of setf form
2463 ;; (setf (gnus-agent-cat-score-file (assq ',category gnus-category-alist))
2465 ;; use its expansion instead:
2466 (gnus-agent-cat-set-property (assq ',category gnus-category-alist)
2467 'agent-score-file score-file)
2469 (gnus-category-write)
2470 (gnus-category-list)))))
2472 (defun gnus-category-edit-groups (category)
2473 "Edit the group list for CATEGORY."
2474 (interactive (list (gnus-category-name)))
2475 (let ((info (assq category gnus-category-alist)))
2477 (gnus-agent-cat-groups info)
2478 (format "Editing the group list for category %s" category)
2480 ;; Avoid run-time execution of setf form
2481 ;; (setf (gnus-agent-cat-groups (assq ',category gnus-category-alist))
2483 ;; use its expansion instead:
2484 (gnus-agent-set-cat-groups (assq ',category gnus-category-alist)
2487 (gnus-category-write)
2488 (gnus-category-list)))))
2490 (defun gnus-category-kill (category)
2491 "Kill the current category."
2492 (interactive (list (gnus-category-name)))
2493 (let ((info (assq category gnus-category-alist))
2494 (buffer-read-only nil))
2496 (setq gnus-category-alist (delq info gnus-category-alist))
2497 (gnus-category-write)))
2499 (defun gnus-category-copy (category to)
2500 "Copy the current category."
2501 (interactive (list (gnus-category-name) (intern (read-string "New name: "))))
2502 (let ((info (assq category gnus-category-alist)))
2503 (push (let ((newcat (gnus-copy-sequence info)))
2504 (setf (gnus-agent-cat-name newcat) to)
2505 (setf (gnus-agent-cat-groups newcat) nil)
2507 gnus-category-alist)
2508 (gnus-category-write)
2509 (gnus-category-list)))
2511 (defun gnus-category-add (category)
2512 "Create a new category."
2513 (interactive "SCategory name: ")
2514 (when (assq category gnus-category-alist)
2515 (error "Category %s already exists" category))
2516 (push (gnus-agent-cat-make category)
2517 gnus-category-alist)
2518 (gnus-category-write)
2519 (gnus-category-list))
2521 (defun gnus-category-list ()
2522 "List all categories."
2524 (gnus-category-prepare))
2526 (defun gnus-category-exit ()
2527 "Return to the group buffer."
2529 (kill-buffer (current-buffer))
2530 (gnus-configure-windows 'group t))
2532 ;; To avoid having 8-bit characters in the source file.
2533 (defvar gnus-category-not (list '! 'not (intern (format "%c" 172))))
2535 (defvar gnus-category-predicate-alist
2536 '((spam . gnus-agent-spam-p)
2537 (short . gnus-agent-short-p)
2538 (long . gnus-agent-long-p)
2539 (low . gnus-agent-low-scored-p)
2540 (high . gnus-agent-high-scored-p)
2541 (read . gnus-agent-read-p)
2542 (true . gnus-agent-true)
2543 (false . gnus-agent-false))
2544 "Mapping from short score predicate symbols to predicate functions.")
2546 (defun gnus-agent-spam-p ()
2547 "Say whether an article is spam or not."
2548 (unless gnus-agent-spam-hashtb
2549 (setq gnus-agent-spam-hashtb (gnus-make-hashtable 1000)))
2550 (if (not (equal (mail-header-references gnus-headers) ""))
2552 (let ((string (gnus-simplify-subject (mail-header-subject gnus-headers))))
2554 (gnus-gethash string gnus-agent-spam-hashtb)
2555 (gnus-sethash string t gnus-agent-spam-hashtb)))))
2557 (defun gnus-agent-short-p ()
2558 "Say whether an article is short or not."
2559 (< (mail-header-lines gnus-headers) gnus-agent-short-article))
2561 (defun gnus-agent-long-p ()
2562 "Say whether an article is long or not."
2563 (> (mail-header-lines gnus-headers) gnus-agent-long-article))
2565 (defun gnus-agent-low-scored-p ()
2566 "Say whether an article has a low score or not."
2567 (< gnus-score gnus-agent-low-score))
2569 (defun gnus-agent-high-scored-p ()
2570 "Say whether an article has a high score or not."
2571 (> gnus-score gnus-agent-high-score))
2573 (defun gnus-agent-read-p ()
2574 "Say whether an article is read or not."
2575 (gnus-member-of-range (mail-header-number gnus-headers)
2576 (gnus-info-read (gnus-get-info gnus-newsgroup-name))))
2578 (defun gnus-category-make-function (predicate)
2579 "Make a function from PREDICATE."
2580 (let ((func (gnus-category-make-function-1 predicate)))
2581 (if (and (= (length func) 1)
2582 (symbolp (car func)))
2584 (gnus-byte-compile `(lambda () ,func)))))
2586 (defun gnus-agent-true ()
2590 (defun gnus-agent-false ()
2594 (defun gnus-category-make-function-1 (predicate)
2595 "Make a function from PREDICATE."
2597 ;; Functions are just returned as is.
2598 ((or (symbolp predicate)
2599 (functionp predicate))
2600 `(,(or (cdr (assq predicate gnus-category-predicate-alist))
2602 ;; More complex predicate.
2605 ((memq (car predicate) '(& and))
2607 ((memq (car predicate) '(| or))
2609 ((memq (car predicate) gnus-category-not)
2611 ,@(mapcar 'gnus-category-make-function-1 (cdr predicate))))
2613 (error "Unknown predicate type: %s" predicate))))
2615 (defun gnus-get-predicate (predicate)
2616 "Return the function implementing PREDICATE."
2617 (or (cdr (assoc predicate gnus-category-predicate-cache))
2618 (let ((func (gnus-category-make-function predicate)))
2619 (setq gnus-category-predicate-cache
2620 (nconc gnus-category-predicate-cache
2621 (list (cons predicate func))))
2624 (defun gnus-predicate-implies-unread (predicate)
2625 "Say whether PREDICATE implies unread articles only.
2626 It is okay to miss some cases, but there must be no false positives.
2627 That is, if this predicate returns true, then indeed the predicate must
2628 return only unread articles."
2629 (eq t (gnus-function-implies-unread-1
2630 (gnus-category-make-function-1 predicate))))
2632 (defun gnus-function-implies-unread-1 (function)
2633 "Recursively evaluate a predicate function to determine whether it can select
2634 any read articles. Returns t if the function is known to never
2635 return read articles, nil when it is known to always return read
2636 articles, and t_nil when the function may return both read and unread
2638 (let ((func (car function))
2639 (args (mapcar 'gnus-function-implies-unread-1 (cdr function))))
2640 (cond ((eq func 'and)
2641 (cond ((memq t args) ; if any argument returns only unread articles
2642 ;; then that argument constrains the result to only unread articles.
2644 ((memq 't_nil args) ; if any argument is indeterminate
2645 ;; then the result is indeterminate
2648 (cond ((memq nil args) ; if any argument returns read articles
2649 ;; then that argument ensures that the results includes read articles.
2651 ((memq 't_nil args) ; if any argument is indeterminate
2652 ;; then that argument ensures that the results are indeterminate
2654 (t ; if all arguments return only unread articles
2655 ;; then the result returns only unread articles
2658 (cond ((eq (car args) 't_nil) ; if the argument is indeterminate
2659 ; then the result is indeterminate
2662 ; toggle the result to be the opposite of the argument
2664 ((eq func 'gnus-agent-read-p)
2665 nil) ; The read predicate NEVER returns unread articles
2666 ((eq func 'gnus-agent-false)
2667 t) ; The false predicate returns t as the empty set excludes all read articles
2668 ((eq func 'gnus-agent-true)
2669 nil) ; The true predicate ALWAYS returns read articles
2670 ((catch 'found-match
2671 (let ((alist gnus-category-predicate-alist))
2673 (if (eq func (cdar alist))
2674 (throw 'found-match t)
2675 (setq alist (cdr alist))))))
2676 't_nil) ; All other predicates return read and unread articles
2678 (error "Unknown predicate function: %s" function)))))
2680 (defun gnus-group-category (group)
2681 "Return the category GROUP belongs to."
2682 (unless gnus-category-group-cache
2683 (setq gnus-category-group-cache (gnus-make-hashtable 1000))
2684 (let ((cs gnus-category-alist)
2686 (while (setq cat (pop cs))
2687 (setq groups (gnus-agent-cat-groups cat))
2689 (gnus-sethash (pop groups) cat gnus-category-group-cache)))))
2690 (or (gnus-gethash group gnus-category-group-cache)
2691 (assq 'default gnus-category-alist)))
2693 (defun gnus-agent-expire-group (group &optional articles force)
2694 "Expire all old articles in GROUP.
2695 If you want to force expiring of certain articles, this function can
2696 take ARTICLES, and FORCE parameters as well.
2698 The articles on which the expiration process runs are selected as follows:
2699 if ARTICLES is null, all read and unmarked articles.
2700 if ARTICLES is t, all articles.
2701 if ARTICLES is a list, just those articles.
2702 FORCE is equivalent to setting the expiration predicates to true."
2704 (list (let ((def (or (gnus-group-group-name)
2705 gnus-newsgroup-name)))
2706 (let ((select (read-string (if def
2707 (concat "Group Name ("
2710 (if (and (equal "" select)
2716 (gnus-agent-expire articles group force)
2717 (let ( ;; Bind gnus-agent-expire-stats to enable tracking of
2718 ;; expiration statistics of this single group
2719 (gnus-agent-expire-stats (list 0 0 0.0)))
2720 (if (or (not (eq articles t))
2722 (concat "Are you sure that you want to "
2723 "expire all articles in " group ".")))
2724 (let ((gnus-command-method (gnus-find-method-for-group group))
2725 (overview (gnus-get-buffer-create " *expire overview*"))
2728 (let ((active-file (gnus-agent-lib-file "active")))
2729 (when (file-exists-p active-file)
2731 (nnheader-insert-file-contents active-file)
2732 (gnus-active-to-gnus-format
2734 (setq orig (gnus-make-hashtable
2735 (count-lines (point-min) (point-max))))))
2737 (gnus-agent-expire-group-1
2738 group overview (gnus-gethash-safe group orig)
2740 (kill-buffer overview))))
2741 (gnus-message 4 (gnus-agent-expire-done-message)))))
2743 (defun gnus-agent-expire-group-1 (group overview active articles force)
2744 ;; Internal function - requires caller to have set
2745 ;; gnus-command-method, initialized overview buffer, and to have
2746 ;; provided a non-nil active
2748 (let ((dir (gnus-agent-group-pathname group)))
2749 (when (boundp 'gnus-agent-expire-current-dirs)
2750 (set 'gnus-agent-expire-current-dirs
2752 (symbol-value 'gnus-agent-expire-current-dirs))))
2754 (if (and (not force)
2755 (eq 'DISABLE (gnus-agent-find-parameter group
2756 'agent-enable-expiration)))
2757 (gnus-message 5 "Expiry skipping over %s" group)
2758 (gnus-message 5 "Expiring articles in %s" group)
2759 (gnus-agent-load-alist group)
2760 (let* ((stats (if (boundp 'gnus-agent-expire-stats)
2761 ;; Use the list provided by my caller
2762 (symbol-value 'gnus-agent-expire-stats)
2763 ;; otherwise use my own temporary list
2765 (info (gnus-get-info group))
2766 (alist gnus-agent-article-alist)
2767 (day (- (time-to-days (current-time))
2768 (gnus-agent-find-parameter group 'agent-days-until-old)))
2769 (specials (if (and alist
2771 ;; This could be a bit of a problem. I need to
2772 ;; keep the last article to avoid refetching
2773 ;; headers when using nntp in the backend. At
2774 ;; the same time, if someone uses a backend
2775 ;; that supports article moving then I may have
2776 ;; to remove the last article to complete the
2777 ;; move. Right now, I'm going to assume that
2778 ;; FORCE overrides specials.
2779 (list (caar (last alist)))))
2780 (unreads ;; Articles that are excluded from the
2781 ;; expiration process
2782 (cond (gnus-agent-expire-all
2783 ;; All articles are marked read by global decree
2786 ;; All articles are marked read by function
2790 ;; Unread articles are marked protected from
2791 ;; expiration Don't call
2792 ;; gnus-list-of-unread-articles as it returns
2793 ;; articles that have not been fetched into the
2796 (gnus-agent-unread-articles group)))
2798 ;; All articles EXCEPT those named by the caller
2799 ;; are protected from expiration
2800 (gnus-sorted-difference
2801 (gnus-uncompress-range
2803 (caar (last alist))))
2804 (sort articles '<)))))
2805 (marked ;; More articles that are excluded from the
2806 ;; expiration process
2807 (cond (gnus-agent-expire-all
2808 ;; All articles are unmarked by global decree
2811 ;; All articles are unmarked by function
2815 ;; All articles may as well be unmarked as the
2816 ;; unreads list already names the articles we are
2820 ;; Ticked and/or dormant articles are excluded
2823 (gnus-uncompress-range
2824 (cdr (assq 'tick (gnus-info-marks info))))
2825 (gnus-uncompress-range
2827 (gnus-info-marks info))))))))
2828 (nov-file (concat dir ".overview"))
2834 ;; The normal article alist contains elements that look like
2835 ;; (article# . fetch_date) I need to combine other
2836 ;; information with this list. For example, a flag indicating
2837 ;; that a particular article MUST BE KEPT. To do this, I'm
2838 ;; going to transform the elements to look like (article#
2839 ;; fetch_date keep_flag NOV_entry_marker) Later, I'll reverse
2840 ;; the process to generate the expired article alist.
2842 ;; Convert the alist elements to (article# fetch_date nil
2844 (setq dlist (mapcar (lambda (e)
2845 (list (car e) (cdr e) nil nil)) alist))
2847 ;; Convert the keep lists to elements that look like (article#
2848 ;; nil keep_flag nil) then append it to the expanded dlist
2849 ;; These statements are sorted by ascending precidence of the
2851 (setq dlist (nconc dlist
2853 (list e nil 'unread nil))
2855 (setq dlist (nconc dlist
2857 (list e nil 'marked nil))
2859 (setq dlist (nconc dlist
2861 (list e nil 'special nil))
2864 (set-buffer overview)
2866 (buffer-disable-undo)
2867 (when (file-exists-p nov-file)
2868 (gnus-message 7 "gnus-agent-expire: Loading overview...")
2869 (nnheader-insert-file-contents nov-file)
2870 (goto-char (point-min))
2873 (while (< (setq p (point)) (point-max))
2875 ;; If I successfully read an integer (the plus zero
2876 ;; ensures a numeric type), prepend a marker entry
2878 (push (list (+ 0 (read (current-buffer))) nil nil
2879 (set-marker (make-marker) p))
2882 (gnus-message 1 "gnus-agent-expire: read error \
2883 occurred when reading expression at %s in %s. Skipping to next \
2884 line." (point) nov-file)))
2885 ;; Whether I succeeded, or failed, it doesn't matter.
2886 ;; Move to the next line then try again.
2890 7 "gnus-agent-expire: Loading overview... Done"))
2891 (set-buffer-modified-p nil)
2893 ;; At this point, all of the information is in dlist. The
2894 ;; only problem is that much of it is spread across multiple
2895 ;; entries. Sort then MERGE!!
2896 (gnus-message 7 "gnus-agent-expire: Sorting entries... ")
2897 ;; If two entries have the same article-number then sort by
2898 ;; ascending keep_flag.
2905 (cond ((< (nth 0 a) (nth 0 b))
2907 ((> (nth 0 a) (nth 0 b))
2910 (let ((a (or (symbol-value (nth 2 a))
2912 (b (or (symbol-value (nth 2 b))
2915 (gnus-message 7 "gnus-agent-expire: Sorting entries... Done")
2916 (gnus-message 7 "gnus-agent-expire: Merging entries... ")
2917 (let ((dlist dlist))
2918 (while (cdr dlist) ; I'm not at the end-of-list
2919 (if (eq (caar dlist) (caadr dlist))
2920 (let ((first (cdr (car dlist)))
2921 (secnd (cdr (cadr dlist))))
2922 (setcar first (or (car first)
2923 (car secnd))) ; fetch_date
2924 (setq first (cdr first)
2926 (setcar first (or (car first)
2927 (car secnd))) ; Keep_flag
2928 (setq first (cdr first)
2930 (setcar first (or (car first)
2931 (car secnd))) ; NOV_entry_marker
2933 (setcdr dlist (cddr dlist)))
2934 (setq dlist (cdr dlist)))))
2935 (gnus-message 7 "gnus-agent-expire: Merging entries... Done")
2937 (let* ((len (float (length dlist)))
2941 (let ((new-completed (truncate (* 100.0
2942 (/ (setq cnt (1+ cnt))
2945 (when (> new-completed completed)
2946 (setq completed new-completed)
2947 (gnus-message 7 "%3d%% completed..." completed)))
2948 (let* ((entry (car dlist))
2949 (article-number (nth 0 entry))
2950 (fetch-date (nth 1 entry))
2951 (keep (nth 2 entry))
2952 (marker (nth 3 entry)))
2955 ;; Kept articles are unread, marked, or special.
2957 (gnus-agent-message 10
2958 "gnus-agent-expire: %s:%d: Kept %s article%s."
2959 group article-number keep (if fetch-date " and file" ""))
2961 (unless (file-exists-p
2962 (concat dir (number-to-string
2964 (setf (nth 1 entry) nil)
2965 (gnus-agent-message 3 "gnus-agent-expire cleared \
2966 download flag on %s:%d as the cached article file is missing."
2967 group (caar dlist)))
2969 (gnus-message 1 "gnus-agent-expire detected a \
2970 missing NOV entry. Run gnus-agent-regenerate-group to restore it.")))
2971 (gnus-agent-append-to-list
2973 (cons article-number fetch-date)))
2975 ;; The following articles are READ, UNMARKED, and
2976 ;; ORDINARY. See if they can be EXPIRED!!!
2979 ((not (integerp fetch-date))
2980 'read) ;; never fetched article (may expire
2982 ((not (file-exists-p
2983 (concat dir (number-to-string
2985 (setf (nth 1 entry) nil)
2986 'externally-expired) ;; Can't find the cached
2987 ;; article. Handle case
2988 ;; as though this article
2989 ;; was never fetched.
2991 ;; We now have the arrival day, so we see
2992 ;; whether it's old enough to be expired.
2998 ;; I found some reason to expire this entry.
3000 (let ((actions nil))
3001 (when (memq type '(forced expired))
3002 (ignore-errors ; Just being paranoid.
3003 (let ((file-name (concat dir (number-to-string
3005 (incf (nth 2 stats) (nth 7 (file-attributes file-name)))
3006 (incf (nth 1 stats))
3007 (delete-file file-name))
3008 (push "expired cached article" actions))
3009 (setf (nth 1 entry) nil)
3013 (push "NOV entry removed" actions)
3016 (incf (nth 0 stats))
3018 (let ((from (point-at-bol))
3019 (to (progn (forward-line 1) (point))))
3020 (incf (nth 2 stats) (- to from))
3021 (delete-region from to)))
3023 ;; If considering all articles is set, I can only
3024 ;; expire article IDs that are no longer in the
3025 ;; active range (That is, articles that preceed the
3026 ;; first article in the new alist).
3027 (if (and gnus-agent-consider-all-articles
3028 (>= article-number (car active)))
3029 ;; I have to keep this ID in the alist
3030 (gnus-agent-append-to-list
3031 tail-alist (cons article-number fetch-date))
3032 (push (format "Removed %s article number from \
3033 article alist" type) actions))
3036 (gnus-agent-message 8 "gnus-agent-expire: %s:%d: %s"
3037 group article-number
3038 (mapconcat 'identity actions ", ")))))
3041 10 "gnus-agent-expire: %s:%d: Article kept as \
3042 expiration tests failed." group article-number)
3043 (gnus-agent-append-to-list
3044 tail-alist (cons article-number fetch-date)))
3047 ;; Clean up markers as I want to recycle this buffer
3048 ;; over several groups.
3050 (set-marker marker nil))
3052 (setq dlist (cdr dlist))))
3054 (setq alist (cdr alist))
3056 (let ((inhibit-quit t))
3057 (unless (equal alist gnus-agent-article-alist)
3058 (setq gnus-agent-article-alist alist)
3059 (gnus-agent-save-alist group))
3061 (when (buffer-modified-p)
3062 (gnus-make-directory dir)
3063 (write-region-as-coding-system gnus-agent-file-coding-system
3064 (point-min) (point-max) nov-file
3066 ;; clear the modified flag as that I'm not confused by
3067 ;; its status on the next pass through this routine.
3068 (set-buffer-modified-p nil))
3070 (when (eq articles t)
3071 (gnus-summary-update-info))))))))
3073 (defun gnus-agent-expire (&optional articles group force)
3074 "Expire all old articles.
3075 If you want to force expiring of certain articles, this function can
3076 take ARTICLES, GROUP and FORCE parameters as well.
3078 The articles on which the expiration process runs are selected as follows:
3079 if ARTICLES is null, all read and unmarked articles.
3080 if ARTICLES is t, all articles.
3081 if ARTICLES is a list, just those articles.
3082 Setting GROUP will limit expiration to that group.
3083 FORCE is equivalent to setting the expiration predicates to true."
3087 (gnus-agent-expire-group group articles force)
3088 (if (or (not (eq articles t))
3089 (yes-or-no-p "Are you sure that you want to expire all \
3090 articles in every agentized group."))
3091 (let ((methods (gnus-agent-covered-methods))
3092 ;; Bind gnus-agent-expire-current-dirs to enable tracking
3093 ;; of agent directories.
3094 (gnus-agent-expire-current-dirs nil)
3095 ;; Bind gnus-agent-expire-stats to enable tracking of
3096 ;; expiration statistics across all groups
3097 (gnus-agent-expire-stats (list 0 0 0.0))
3098 gnus-command-method overview orig)
3099 (setq overview (gnus-get-buffer-create " *expire overview*"))
3101 (while (setq gnus-command-method (pop methods))
3102 (let ((active-file (gnus-agent-lib-file "active")))
3103 (when (file-exists-p active-file)
3105 (nnheader-insert-file-contents active-file)
3106 (gnus-active-to-gnus-format
3108 (setq orig (gnus-make-hashtable
3109 (count-lines (point-min) (point-max))))))
3110 (dolist (expiring-group (gnus-groups-from-server
3111 gnus-command-method))
3113 (gnus-gethash-safe expiring-group orig)))
3117 (gnus-agent-expire-group-1
3118 expiring-group overview active articles force))))))))
3119 (kill-buffer overview))
3120 (gnus-agent-expire-unagentized-dirs)
3121 (gnus-message 4 (gnus-agent-expire-done-message))))))
3123 (defun gnus-agent-expire-done-message ()
3124 (if (and (> gnus-verbose 4)
3125 (boundp 'gnus-agent-expire-stats))
3126 (let* ((stats (symbol-value 'gnus-agent-expire-stats))
3127 (size (nth 2 stats))
3128 (units '(B KB MB GB)))
3129 (while (and (> size 1024.0)
3131 (setq size (/ size 1024.0)
3134 (format "Expiry recovered %d NOV entries, deleted %d files,\
3141 (defun gnus-agent-expire-unagentized-dirs ()
3142 (when (and gnus-agent-expire-unagentized-dirs
3143 (boundp 'gnus-agent-expire-current-dirs))
3144 (let* ((keep (gnus-make-hashtable))
3145 ;; Formally bind gnus-agent-expire-current-dirs so that the
3146 ;; compiler will not complain about free references.
3147 (gnus-agent-expire-current-dirs
3148 (symbol-value 'gnus-agent-expire-current-dirs))
3151 (gnus-sethash gnus-agent-directory t keep)
3152 (while gnus-agent-expire-current-dirs
3153 (setq dir (pop gnus-agent-expire-current-dirs))
3154 (when (and (stringp dir)
3155 (file-directory-p dir))
3156 (while (not (gnus-gethash dir keep))
3157 (gnus-sethash dir t keep)
3158 (setq dir (file-name-directory (directory-file-name dir))))))
3165 "Given a directory, check it and its subdirectories for
3166 membership in the keep hash. If it isn't found, add
3168 (let ((files (directory-files d))
3170 (while (setq file (pop files))
3171 (cond ((equal file ".") ; Ignore self
3173 ((equal file "..") ; Ignore parent
3175 ((equal file ".overview")
3176 ;; Directory must contain .overview to be
3177 ;; agent's cache of a group.
3178 (let ((d (file-name-as-directory d))
3180 ;; Search ancestor's for last directory NOT
3181 ;; found in keep hash.
3182 (while (not (gnus-gethash
3183 (setq d (file-name-directory d)) keep))
3185 d (directory-file-name d)))
3186 ;; if ANY ancestor was NOT in keep hash and
3187 ;; it it's already in to-remove, add it to
3190 (not (member r to-remove)))
3191 (push r to-remove))))
3192 ((file-directory-p (setq file (nnheader-concat d file)))
3193 (funcall checker file)))))))))
3194 (funcall checker (expand-file-name gnus-agent-directory))
3196 (when (and to-remove
3197 (or gnus-expert-user
3199 "gnus-agent-expire has identified local directories that are\
3200 not currently required by any agentized group. Do you wish to consider\
3203 (let ((dir (pop to-remove)))
3204 (if (gnus-y-or-n-p (format "Delete %s? " dir))
3205 (let* (delete-recursive
3210 (if (file-directory-p f-or-d)
3212 (delete-directory f-or-d)
3215 (or (member f '("." ".."))
3216 (funcall delete-recursive
3219 (directory-files f-or-d))
3220 (delete-directory f-or-d)))
3221 (delete-file f-or-d)))))))
3222 (funcall delete-recursive dir))))))))))
3225 (defun gnus-agent-batch ()
3226 "Start Gnus, send queue and fetch session."
3228 (let ((init-file-user "")
3229 (gnus-always-read-dribble-file t))
3231 (let ((gnus-agent-confirmation-function 'gnus-agent-batch-confirmation))
3232 (gnus-group-send-queue)
3233 (gnus-agent-fetch-session)))
3235 (defun gnus-agent-unread-articles (group)
3236 (let* ((read (gnus-info-read (gnus-get-info group)))
3237 (known (gnus-agent-load-alist group))
3239 (tail-unread unread))
3240 (while (and known read)
3241 (let ((candidate (car (pop known))))
3242 (while (let* ((range (car read))
3243 (min (if (numberp range) range (car range)))
3244 (max (if (numberp range) range (cdr range))))
3245 (cond ((or (not min)
3247 (gnus-agent-append-to-list tail-unread candidate)
3250 (setq read (cdr read))
3251 ;; return t so that I always loop one more
3252 ;; time. If I just iterated off the end of
3253 ;; read, min will become nil and the current
3254 ;; candidate will be added to the unread list.
3257 (gnus-agent-append-to-list tail-unread (car (pop known))))
3260 (defun gnus-agent-uncached-articles (articles group &optional cached-header)
3261 "Restrict ARTICLES to numbers already fetched.
3262 Returns a sublist of ARTICLES that excludes thos article ids in GROUP
3263 that have already been fetched.
3264 If CACHED-HEADER is nil, articles are only excluded if the article itself
3267 ;; Logically equivalent to: (gnus-sorted-difference articles (mapcar
3268 ;; 'car gnus-agent-article-alist))
3270 ;; Functionally, I don't need to construct a temp list using mapcar.
3272 (if (and (or gnus-agent-cache (not gnus-plugged))
3273 (gnus-agent-load-alist group))
3274 (let* ((ref gnus-agent-article-alist)
3276 (uncached (list nil))
3277 (tail-uncached uncached))
3278 (while (and ref arts)
3279 (let ((v1 (car arts))
3281 (cond ((< v1 v2) ; v1 does not appear in the reference list
3282 (gnus-agent-append-to-list tail-uncached v1)
3283 (setq arts (cdr arts)))
3285 (unless (or cached-header (cdar ref)) ; v1 is already cached
3286 (gnus-agent-append-to-list tail-uncached v1))
3287 (setq arts (cdr arts))
3288 (setq ref (cdr ref)))
3289 (t ; reference article (v2) preceeds the list being filtered
3290 (setq ref (cdr ref))))))
3292 (gnus-agent-append-to-list tail-uncached (pop arts)))
3294 ;; if gnus-agent-load-alist fails, no articles are cached.
3297 (defun gnus-agent-retrieve-headers (articles group &optional fetch-old)
3299 (gnus-agent-create-buffer)
3300 (let ((gnus-decode-encoded-word-function 'identity)
3301 (file (gnus-agent-article-name ".overview" group))
3302 cached-articles uncached-articles)
3303 (gnus-make-directory (nnheader-translate-file-chars
3304 (file-name-directory file) t))
3306 ;; Populate temp buffer with known headers
3307 (when (file-exists-p file)
3308 (with-current-buffer gnus-agent-overview-buffer
3310 (let ((nnheader-file-coding-system
3311 gnus-agent-file-coding-system))
3312 (nnheader-insert-nov-file file (car articles)))))
3314 (if (setq uncached-articles (gnus-agent-uncached-articles articles group
3317 ;; Populate nntp-server-buffer with uncached headers
3318 (set-buffer nntp-server-buffer)
3320 (cond ((not (eq 'nov (let (gnus-agent) ; Turn off agent
3321 (gnus-retrieve-headers
3322 uncached-articles group fetch-old))))
3323 (nnvirtual-convert-headers))
3324 ((eq 'nntp (car gnus-current-select-method))
3325 ;; The author of gnus-get-newsgroup-headers-xover
3326 ;; reports that the XOVER command is commonly
3327 ;; unreliable. The problem is that recently
3328 ;; posted articles may not be entered into the
3329 ;; NOV database in time to respond to my XOVER
3332 ;; I'm going to use his assumption that the NOV
3333 ;; database is updated in order of ascending
3334 ;; article ID. Therefore, a response containing
3335 ;; article ID N implies that all articles from 1
3336 ;; to N-1 are up-to-date. Therefore, missing
3337 ;; articles in that range have expired.
3339 (set-buffer nntp-server-buffer)
3340 (let* ((fetched-articles (list nil))
3341 (tail-fetched-articles fetched-articles)
3342 (min (cond ((numberp fetch-old)
3343 (max 1 (- (car articles) fetch-old)))
3348 (max (car (last articles))))
3350 ;; Get the list of articles that were fetched
3351 (goto-char (point-min))
3352 (let ((pm (point-max)))
3353 (while (< (point) pm)
3354 (when (looking-at "[0-9]+\t")
3355 (gnus-agent-append-to-list
3356 tail-fetched-articles
3357 (read (current-buffer))))
3360 ;; Clip this list to the headers that will
3361 ;; actually be returned
3362 (setq fetched-articles (gnus-list-range-intersection
3363 (cdr fetched-articles)
3366 ;; Clip the uncached articles list to exclude
3367 ;; IDs after the last FETCHED header. The
3368 ;; excluded IDs may be fetchable using HEAD.
3369 (if (car tail-fetched-articles)
3370 (setq uncached-articles
3371 (gnus-list-range-intersection
3373 (cons (car uncached-articles)
3374 (car tail-fetched-articles)))))
3376 ;; Create the list of articles that were
3377 ;; "successfully" fetched. Success, in this
3378 ;; case, means that the ID should not be
3379 ;; fetched again. In the case of an expired
3380 ;; article, the header will not be fetched.
3381 (setq uncached-articles
3382 (gnus-sorted-nunion fetched-articles
3386 ;; Erase the temp buffer
3387 (set-buffer gnus-agent-overview-buffer)
3390 ;; Copy the nntp-server-buffer to the temp buffer
3391 (set-buffer nntp-server-buffer)
3392 (copy-to-buffer gnus-agent-overview-buffer (point-min) (point-max))
3394 ;; Merge the temp buffer with the known headers (found on
3395 ;; disk in FILE) into the nntp-server-buffer
3396 (when (and uncached-articles (file-exists-p file))
3397 (gnus-agent-braid-nov group uncached-articles file))
3399 ;; Save the new set of known headers to FILE
3400 (set-buffer nntp-server-buffer)
3401 (gnus-agent-check-overview-buffer)
3402 (write-region-as-coding-system
3403 gnus-agent-file-coding-system
3404 (point-min) (point-max) file nil 'silent)
3406 ;; Update the group's article alist to include the newly
3407 ;; fetched articles.
3408 (gnus-agent-load-alist group)
3409 (gnus-agent-save-alist group uncached-articles nil)
3412 ;; Copy the temp buffer to the nntp-server-buffer
3413 (set-buffer nntp-server-buffer)
3415 (insert-buffer-substring gnus-agent-overview-buffer)))
3418 (not (numberp fetch-old)))
3419 t ; Don't remove anything.
3420 (nnheader-nov-delete-outside-range
3421 (if fetch-old (max 1 (- (car articles) fetch-old))
3423 (car (last articles)))
3428 (defun gnus-agent-request-article (article group)
3429 "Retrieve ARTICLE in GROUP from the agent cache."
3430 (when (and gnus-agent
3431 (or gnus-agent-cache
3434 (let* ((gnus-command-method (gnus-find-method-for-group group))
3435 (file (gnus-agent-article-name (number-to-string article) group))
3436 (buffer-read-only nil))
3437 (when (and (file-exists-p file)
3438 (> (nth 7 (file-attributes file)) 0))
3440 (gnus-kill-all-overlays)
3441 (insert-file-contents-as-coding-system gnus-cache-coding-system file)
3444 (defun gnus-agent-regenerate-group (group &optional reread)
3446 If REREAD is t, all articles in the .overview are marked as unread.
3447 If REREAD is a list, the specified articles will be marked as unread.
3448 In addition, their NOV entries in .overview will be refreshed using
3449 the articles' current headers.
3450 If REREAD is not nil, downloaded articles are marked as unread."
3452 (list (let ((def (or (gnus-group-group-name)
3453 gnus-newsgroup-name)))
3454 (let ((select (read-string (if def
3455 (concat "Group Name ("
3458 (if (and (equal "" select)
3464 (cursor-in-echo-area t)
3465 (echo-keystrokes 0))
3466 (message "Mark as unread: (n)one / (a)ll / all (d)ownloaded articles? (n) ")
3467 (setq c (read-char-exclusive))
3469 (cond ((or (eq c ?\r) (eq c ?n) (eq c ?N))
3471 ((or (eq c ?a) (eq c ?A))
3473 ((or (eq c ?d) (eq c ?D))
3474 (throw 'mark 'some)))
3475 (gnus-message 3 "Ignoring unexpected input")
3480 (gnus-message 5 "Regenerating in %s" group)
3481 (let* ((gnus-command-method (or gnus-command-method
3482 (gnus-find-method-for-group group)))
3483 (file (gnus-agent-article-name ".overview" group))
3484 (dir (file-name-directory file))
3486 (downloaded (if (file-exists-p dir)
3487 (sort (mapcar (lambda (name) (string-to-int name))
3488 (directory-files dir nil "^[0-9]+$" t))
3490 (progn (gnus-make-directory dir) nil)))
3495 (mm-with-unibyte-buffer
3496 (if (file-exists-p file)
3497 (let ((nnheader-file-coding-system
3498 gnus-agent-file-coding-system))
3499 (nnheader-insert-file-contents file)))
3500 (set-buffer-modified-p nil)
3502 ;; Load the article IDs found in the overview file. As a
3503 ;; side-effect, validate the file contents.
3507 (goto-char (point-min))
3508 (while (< (point) (point-max))
3509 (cond ((and (looking-at "[0-9]+\t")
3510 (<= (- (match-end 0) (match-beginning 0)) 9))
3511 (push (read (current-buffer)) nov-arts)
3513 (let ((l1 (car nov-arts))
3514 (l2 (cadr nov-arts)))
3515 (cond ((and (listp reread) (memq l1 reread))
3517 (setq nov-arts (cdr nov-arts))
3518 (gnus-message 4 "gnus-agent-regenerate-group: NOV\
3519 entry of article %s deleted." l1))
3523 (gnus-message 3 "gnus-agent-regenerate-group: NOV\
3524 entries are NOT in ascending order.")
3525 ;; Don't sort now as I haven't verified
3526 ;; that every line begins with a number
3530 (gnus-message 4 "gnus-agent-regenerate-group: NOV\
3531 entries contained duplicate of article %s. Duplicate deleted." l1)
3533 (setq nov-arts (cdr nov-arts))))))
3535 (gnus-message 1 "gnus-agent-regenerate-group: NOV\
3536 entries contained line that did not begin with an article number. Deleted\
3538 (gnus-delete-line))))
3540 (gnus-message 5 "gnus-agent-regenerate-group: Sorting NOV\
3541 entries into ascending order.")
3542 (sort-numeric-fields 1 (point-min) (point-max))
3543 (setq nov-arts nil))))
3544 (gnus-agent-check-overview-buffer)
3546 ;; Construct a new article alist whose nodes match every header
3547 ;; in the .overview file. As a side-effect, missing headers are
3548 ;; reconstructed from the downloaded article file.
3549 (while (or downloaded nov-arts)
3550 (cond ((and downloaded
3552 (> (car downloaded) (car nov-arts))))
3553 ;; This entry is missing from the overview file
3554 (gnus-message 3 "Regenerating NOV %s %d..." group
3556 (let ((file (concat dir (number-to-string (car downloaded)))))
3557 (mm-with-unibyte-buffer
3558 (nnheader-insert-file-contents file)
3559 (nnheader-remove-body)
3560 (setq header (nnheader-parse-naked-head)))
3561 (mail-header-set-number header (car downloaded))
3563 (let ((key (concat "^" (int-to-string (car nov-arts))
3565 (or (re-search-backward key nil t)
3566 (re-search-forward key))
3568 (goto-char (point-min)))
3569 (nnheader-insert-nov header))
3570 (setq nov-arts (cons (car downloaded) nov-arts)))
3571 ((eq (car downloaded) (car nov-arts))
3572 ;; This entry in the overview has been downloaded
3573 (push (cons (car downloaded)
3575 (nth 5 (file-attributes
3576 (concat dir (number-to-string
3577 (car downloaded))))))) alist)
3578 (setq downloaded (cdr downloaded))
3579 (setq nov-arts (cdr nov-arts)))
3581 ;; This entry in the overview has not been downloaded
3582 (push (cons (car nov-arts) nil) alist)
3583 (setq nov-arts (cdr nov-arts)))))
3585 ;; When gnus-agent-consider-all-articles is set,
3586 ;; gnus-agent-regenerate-group should NOT remove article IDs from
3587 ;; the alist. Those IDs serve as markers to indicate that an
3588 ;; attempt has been made to fetch that article's header.
3590 ;; When gnus-agent-consider-all-articles is NOT set,
3591 ;; gnus-agent-regenerate-group can remove the article ID of every
3592 ;; article (with the exception of the last ID in the list - it's
3593 ;; special) that no longer appears in the overview. In this
3594 ;; situtation, the last article ID in the list implies that it,
3595 ;; and every article ID preceeding it, have been fetched from the
3598 (if gnus-agent-consider-all-articles
3599 ;; Restore all article IDs that were not found in the overview file.
3600 (let* ((n (cons nil alist))
3602 (o (gnus-agent-load-alist group)))
3604 (let ((nID (caadr n))
3607 (setq n (setcdr n (list (list oID))))
3610 (setcdr n (cons (list oID) (cdr n)))
3616 (setq n (cdr n))))))
3617 (setq alist (cdr merged)))
3618 ;; Restore the last article ID if it is not already in the new alist
3619 (let ((n (last alist))
3620 (o (last (gnus-agent-load-alist group))))
3624 (push (cons (caar o) nil) alist))
3625 ((< (caar n) (caar o))
3626 (setcdr n (list (car o)))))))
3628 (let ((inhibit-quit t))
3629 (if (setq regenerated (buffer-modified-p))
3630 (write-region-as-coding-system
3631 gnus-agent-file-coding-system
3632 (point-min) (point-max) file nil 'silent))
3634 (setq regenerated (or regenerated
3635 (and reread gnus-agent-article-alist)
3636 (not (equal alist gnus-agent-article-alist))))
3638 (setq gnus-agent-article-alist alist)
3641 (gnus-agent-save-alist group)
3643 ;; I have to alter the group's active range NOW as
3644 ;; gnus-make-ascending-articles-unread will use it to
3645 ;; recalculate the number of unread articles in the group
3647 (let ((group (gnus-group-real-name group))
3648 (group-active (gnus-active group)))
3649 (gnus-agent-possibly-alter-active group group-active)))))
3651 (when (and reread gnus-agent-article-alist)
3652 (gnus-make-ascending-articles-unread
3656 (delq nil (mapcar (function (lambda (c)
3657 (cond ((eq reread t)
3661 gnus-agent-article-alist))))
3663 (when (gnus-buffer-live-p gnus-group-buffer)
3664 (gnus-group-update-group group t)
3667 (gnus-message 5 nil)
3671 (defun gnus-agent-regenerate (&optional clean reread)
3672 "Regenerate all agent covered files.
3673 If CLEAN, obsolete (ignore)."
3676 (gnus-message 4 "Regenerating Gnus agent files...")
3677 (dolist (gnus-command-method (gnus-agent-covered-methods))
3678 (dolist (group (gnus-groups-from-server gnus-command-method))
3679 (setq regenerated (or (gnus-agent-regenerate-group group reread)
3681 (gnus-message 4 "Regenerating Gnus agent files...done")
3685 (defun gnus-agent-go-online (&optional force)
3686 "Switch servers into online status."
3687 (interactive (list t))
3688 (dolist (server gnus-opened-servers)
3689 (when (eq (nth 1 server) 'offline)
3690 (if (if (eq force 'ask)
3692 (format "Switch %s:%s into online status? "
3693 (caar server) (cadar server)))
3695 (setcar (nthcdr 1 server) 'close)))))
3697 (defun gnus-agent-toggle-group-plugged (group)
3698 "Toggle the status of the server of the current group."
3699 (interactive (list (gnus-group-group-name)))
3700 (let* ((method (gnus-find-method-for-group group))
3701 (status (cadr (assoc method gnus-opened-servers))))
3702 (if (eq status 'offline)
3703 (gnus-server-set-status method 'closed)
3704 (gnus-close-server method)
3705 (gnus-server-set-status method 'offline))
3706 (message "Turn %s:%s from %s to %s." (car method) (cadr method)
3707 (if (eq status 'offline) 'offline 'online)
3708 (if (eq status 'offline) 'online 'offline))))
3710 (defun gnus-agent-group-covered-p (group)
3711 (gnus-agent-method-p (gnus-group-method group)))
3713 (add-hook 'gnus-group-prepare-hook
3717 (when (listp gnus-agent-expire-days)
3720 (gnus-message 1 "WARNING: gnus-agent-expire-days no longer\
3721 supports being set to a list.")(sleep-for 3)
3722 (gnus-message 1 "Change your configuration to set it to an\
3723 integer.")(sleep-for 3)
3724 (gnus-message 1 "I am now setting group parameters on each\
3725 group to match the configuration that the list offered.")
3728 (let ((groups (gnus-group-listed-groups)))
3730 (let* ((group (pop groups))
3731 (days gnus-agent-expire-days)
3734 (when (eq 0 (string-match
3737 (throw 'found (cadar days)))
3738 (setq days (cdr days)))
3741 (gnus-group-set-parameter group 'agent-days-until-old
3744 (let ((h gnus-group-prepare-hook))
3746 (let ((func (pop h)))
3747 (when (and (listp func)
3748 (eq (cadr (caddr func)) 'gnus-agent-do-once))
3749 (remove-hook 'gnus-group-prepare-hook func)
3752 (gnus-message 1 "I have finished setting group parameters on\
3753 each group. You may now customize your groups and/or topics to control the\
3756 (provide 'gnus-agent)
3758 ;;; gnus-agent.el ends here