emacs-lisp/package.el (package-delete): Always unselect package.
[emacs.git] / lisp / gnus / nnmbox.el
blob78983a5cfef9f599bb03bc8c18ec8244e2146be5
1 ;;; nnmbox.el --- mail mbox access for Gnus
3 ;; Copyright (C) 1995-2015 Free Software Foundation, Inc.
5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
6 ;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
7 ;; Keywords: news, mail
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software: you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation, either version 3 of the License, or
14 ;; (at your option) any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
24 ;;; Commentary:
26 ;; For an overview of what the interface functions do, please see the
27 ;; Gnus sources.
29 ;;; Code:
31 (require 'nnheader)
32 (require 'message)
33 (require 'nnmail)
34 (require 'nnoo)
35 (require 'gnus-range)
36 (eval-when-compile (require 'cl))
38 (nnoo-declare nnmbox)
40 (defvoo nnmbox-mbox-file (expand-file-name "~/mbox")
41 "The name of the mail box file in the user's home directory.")
43 (defvoo nnmbox-active-file (expand-file-name "~/.mbox-active")
44 "The name of the active file for the mail box.")
46 (defvoo nnmbox-get-new-mail t
47 "If non-nil, nnmbox will check the incoming mail file and split the mail.")
49 (defvoo nnmbox-prepare-save-mail-hook nil
50 "Hook run narrowed to an article before saving.")
54 (defconst nnmbox-version "nnmbox 1.0"
55 "nnmbox version.")
57 (defvoo nnmbox-current-group nil
58 "Current nnmbox news group directory.")
60 (defvar nnmbox-mbox-buffer nil)
62 (defvoo nnmbox-status-string "")
64 (defvoo nnmbox-group-alist nil)
65 (defvoo nnmbox-active-timestamp nil)
67 (defvoo nnmbox-file-coding-system mm-binary-coding-system)
68 (defvoo nnmbox-file-coding-system-for-write nil)
69 (defvoo nnmbox-active-file-coding-system mm-binary-coding-system)
70 (defvoo nnmbox-active-file-coding-system-for-write nil)
72 (defvar nnmbox-group-building-active-articles nil)
73 (defvar nnmbox-group-active-articles nil)
76 ;;; Interface functions
78 (nnoo-define-basics nnmbox)
80 (deffoo nnmbox-retrieve-headers (sequence &optional newsgroup server fetch-old)
81 (with-current-buffer nntp-server-buffer
82 (erase-buffer)
83 (let ((number (length sequence))
84 (count 0)
85 article start stop)
86 (nnmbox-possibly-change-newsgroup newsgroup server)
87 (while sequence
88 (setq article (car sequence))
89 (set-buffer nnmbox-mbox-buffer)
90 (when (nnmbox-find-article article)
91 (setq start
92 (save-excursion
93 (re-search-backward
94 (concat "^" message-unix-mail-delimiter) nil t)
95 (point)))
96 (search-forward "\n\n" nil t)
97 (setq stop (1- (point)))
98 (set-buffer nntp-server-buffer)
99 (insert (format "221 %d Article retrieved.\n" article))
100 (insert-buffer-substring nnmbox-mbox-buffer start stop)
101 (goto-char (point-max))
102 (insert ".\n"))
103 (setq sequence (cdr sequence))
104 (setq count (1+ count))
105 (and (numberp nnmail-large-newsgroup)
106 (> number nnmail-large-newsgroup)
107 (zerop (% count 20))
108 (nnheader-message 5 "nnmbox: Receiving headers... %d%%"
109 (/ (* count 100) number))))
111 (and (numberp nnmail-large-newsgroup)
112 (> number nnmail-large-newsgroup)
113 (nnheader-message 5 "nnmbox: Receiving headers...done"))
115 (set-buffer nntp-server-buffer)
116 (nnheader-fold-continuation-lines)
117 'headers)))
119 (deffoo nnmbox-open-server (server &optional defs)
120 (nnoo-change-server 'nnmbox server defs)
121 (nnmbox-create-mbox)
122 (cond
123 ((not (file-exists-p nnmbox-mbox-file))
124 (nnmbox-close-server)
125 (nnheader-report 'nnmbox "No such file: %s" nnmbox-mbox-file))
126 ((file-directory-p nnmbox-mbox-file)
127 (nnmbox-close-server)
128 (nnheader-report 'nnmbox "Not a regular file: %s" nnmbox-mbox-file))
130 (nnheader-report 'nnmbox "Opened server %s using mbox %s" server
131 nnmbox-mbox-file)
132 t)))
134 (deffoo nnmbox-close-server (&optional server)
135 (when (and nnmbox-mbox-buffer
136 (buffer-name nnmbox-mbox-buffer))
137 (kill-buffer nnmbox-mbox-buffer))
138 (nnoo-close-server 'nnmbox server)
141 (deffoo nnmbox-server-opened (&optional server)
142 (and (nnoo-current-server-p 'nnmbox server)
143 nnmbox-mbox-buffer
144 (buffer-name nnmbox-mbox-buffer)
145 nntp-server-buffer
146 (buffer-name nntp-server-buffer)))
148 (deffoo nnmbox-request-article (article &optional newsgroup server buffer)
149 (nnmbox-possibly-change-newsgroup newsgroup server)
150 (with-current-buffer nnmbox-mbox-buffer
151 (save-excursion
152 (when (nnmbox-find-article article)
153 (let (start stop)
154 (re-search-backward (concat "^" message-unix-mail-delimiter) nil t)
155 (setq start (point))
156 (forward-line 1)
157 (setq stop (if (re-search-forward (concat "^"
158 message-unix-mail-delimiter)
159 nil 'move)
160 (match-beginning 0)
161 (point)))
162 (let ((nntp-server-buffer (or buffer nntp-server-buffer)))
163 (set-buffer nntp-server-buffer)
164 (erase-buffer)
165 (insert-buffer-substring nnmbox-mbox-buffer start stop)
166 (goto-char (point-min))
167 (while (looking-at "From ")
168 (delete-char 5)
169 (insert "X-From-Line: ")
170 (forward-line 1))
171 (if (numberp article)
172 (cons nnmbox-current-group article)
173 (nnmbox-article-group-number nil))))))))
175 (deffoo nnmbox-request-group (group &optional server dont-check info)
176 (nnmbox-possibly-change-newsgroup nil server)
177 (let ((active (cadr (assoc group nnmbox-group-alist))))
178 (cond
179 ((or (null active)
180 (null (nnmbox-possibly-change-newsgroup group server)))
181 (nnheader-report 'nnmbox "No such group: %s" group))
182 (dont-check
183 (nnheader-report 'nnmbox "Selected group %s" group)
184 (nnheader-insert ""))
186 (nnheader-report 'nnmbox "Selected group %s" group)
187 (nnheader-insert "211 %d %d %d %s\n"
188 (1+ (- (cdr active) (car active)))
189 (car active) (cdr active) group)))))
191 (defun nnmbox-save-buffer ()
192 (let ((coding-system-for-write
193 (or nnmbox-file-coding-system-for-write
194 nnmbox-file-coding-system)))
195 (save-buffer)))
197 (defun nnmbox-save-active (group-alist active-file)
198 (let ((nnmail-active-file-coding-system
199 (or nnmbox-active-file-coding-system-for-write
200 nnmbox-active-file-coding-system)))
201 (nnmail-save-active group-alist active-file)))
203 (deffoo nnmbox-request-scan (&optional group server)
204 (nnmbox-possibly-change-newsgroup group server)
205 (nnmbox-read-mbox)
206 (nnmail-get-new-mail
207 'nnmbox
208 (lambda ()
209 (with-current-buffer nnmbox-mbox-buffer
210 (nnmbox-save-buffer)))
211 (file-name-directory nnmbox-mbox-file)
212 group
213 (lambda ()
214 (save-excursion
215 (let ((in-buf (current-buffer)))
216 (set-buffer nnmbox-mbox-buffer)
217 (goto-char (point-max))
218 (insert-buffer-substring in-buf)))
219 (nnmbox-save-active nnmbox-group-alist nnmbox-active-file))))
221 (deffoo nnmbox-close-group (group &optional server)
224 (deffoo nnmbox-request-create-group (group &optional server args)
225 (nnmail-activate 'nnmbox)
226 (unless (assoc group nnmbox-group-alist)
227 (push (list group (cons 1 0))
228 nnmbox-group-alist)
229 (nnmbox-save-active nnmbox-group-alist nnmbox-active-file))
232 (deffoo nnmbox-request-list (&optional server)
233 (save-excursion
234 (let ((nnmail-file-coding-system
235 nnmbox-active-file-coding-system))
236 (nnmail-find-file nnmbox-active-file))
237 (setq nnmbox-group-alist (nnmail-get-active))
240 (deffoo nnmbox-request-newgroups (date &optional server)
241 (nnmbox-request-list server))
243 (deffoo nnmbox-request-list-newsgroups (&optional server)
244 (nnheader-report 'nnmbox "LIST NEWSGROUPS is not implemented."))
246 (deffoo nnmbox-request-expire-articles
247 (articles newsgroup &optional server force)
248 (nnmbox-possibly-change-newsgroup newsgroup server)
249 (let* ((is-old t)
250 rest)
251 (nnmail-activate 'nnmbox)
253 (with-current-buffer nnmbox-mbox-buffer
254 (while (and articles is-old)
255 (when (nnmbox-find-article (car articles))
256 (if (setq is-old
257 (nnmail-expired-article-p
258 newsgroup
259 (buffer-substring (point) (line-end-position))
260 force))
261 (progn
262 (unless (eq nnmail-expiry-target 'delete)
263 (with-temp-buffer
264 (nnmbox-request-article (car articles)
265 newsgroup server
266 (current-buffer))
267 (let ((nnml-current-directory nil))
268 (nnmail-expiry-target-group
269 nnmail-expiry-target newsgroup)))
270 (nnmbox-possibly-change-newsgroup newsgroup server))
271 (nnheader-message 5 "Deleting article %d in %s..."
272 (car articles) newsgroup)
273 (nnmbox-delete-mail))
274 (push (car articles) rest)))
275 (setq articles (cdr articles)))
276 (nnmbox-save-buffer)
277 ;; Find the lowest active article in this group.
278 (let ((active (nth 1 (assoc newsgroup nnmbox-group-alist))))
279 (while (and (not (nnmbox-find-article (car active)))
280 (<= (car active) (cdr active)))
281 (setcar active (1+ (car active)))))
282 (nnmbox-save-active nnmbox-group-alist nnmbox-active-file)
283 (nconc rest articles))))
285 (deffoo nnmbox-request-move-article
286 (article group server accept-form &optional last move-is-internal)
287 (let ((buf (get-buffer-create " *nnmbox move*"))
288 result)
289 (and
290 (nnmbox-request-article article group server)
291 (with-current-buffer buf
292 (erase-buffer)
293 (insert-buffer-substring nntp-server-buffer)
294 (goto-char (point-min))
295 (while (re-search-forward
296 "^X-Gnus-Newsgroup:"
297 (save-excursion (search-forward "\n\n" nil t) (point)) t)
298 (gnus-delete-line))
299 (setq result (eval accept-form))
300 (kill-buffer buf)
301 result)
302 (save-excursion
303 (nnmbox-possibly-change-newsgroup group server)
304 (set-buffer nnmbox-mbox-buffer)
305 (when (nnmbox-find-article article)
306 (nnmbox-delete-mail))
307 (and last (nnmbox-save-buffer))))
308 result))
310 (deffoo nnmbox-request-accept-article (group &optional server last)
311 (nnmbox-possibly-change-newsgroup group server)
312 (nnmail-check-syntax)
313 (let ((buf (current-buffer))
314 result cont)
315 (and
316 (nnmail-activate 'nnmbox)
317 (with-temp-buffer
318 (insert-buffer-substring buf)
319 (goto-char (point-min))
320 (cond (;; The From line may have been quoted by movemail.
321 (looking-at (concat ">" message-unix-mail-delimiter))
322 (delete-char 1)
323 (forward-line 1))
324 ((looking-at "X-From-Line: ")
325 (replace-match "From ")
326 (forward-line 1))
328 (insert "From nobody " (current-time-string) "\n")))
329 (narrow-to-region (point)
330 (if (search-forward "\n\n" nil 'move)
331 (1- (point))
332 (point)))
333 (while (re-search-backward "^X-Gnus-Newsgroup: " nil t)
334 (delete-region (point) (progn (forward-line 1) (point))))
335 (when nnmail-cache-accepted-message-ids
336 (nnmail-cache-insert (message-fetch-field "message-id")
337 group
338 (message-fetch-field "subject")
339 (message-fetch-field "from")))
340 (widen)
341 (setq result (if (stringp group)
342 (list (cons group (nnmbox-active-number group)))
343 (nnmail-article-group 'nnmbox-active-number)))
344 (prog1
345 (if (and (null result)
346 (yes-or-no-p "Moved to `junk' group; delete article? "))
347 (setq result 'junk)
348 (setq result (car (nnmbox-save-mail result))))
349 (setq cont (buffer-string))))
350 (with-current-buffer nnmbox-mbox-buffer
351 (goto-char (point-max))
352 (insert cont)
353 (when last
354 (when nnmail-cache-accepted-message-ids
355 (nnmail-cache-close))
356 (nnmbox-save-active nnmbox-group-alist nnmbox-active-file)
357 (nnmbox-save-buffer))))
358 result))
360 (deffoo nnmbox-request-replace-article (article group buffer)
361 (nnmbox-possibly-change-newsgroup group)
362 (with-current-buffer nnmbox-mbox-buffer
363 (if (not (nnmbox-find-article article))
365 (nnmbox-delete-mail t t)
366 (insert
367 (with-temp-buffer
368 (insert-buffer-substring buffer)
369 (goto-char (point-min))
370 (when (looking-at "X-From-Line:")
371 (delete-region (point) (progn (forward-line 1) (point))))
372 (while (re-search-forward (concat "^" message-unix-mail-delimiter)
373 nil t)
374 (goto-char (match-beginning 0))
375 (insert ">"))
376 (goto-char (point-max))
377 (unless (bolp)
378 (insert "\n"))
379 (buffer-string)))
380 (nnmbox-save-buffer)
381 t)))
383 (deffoo nnmbox-request-delete-group (group &optional force server)
384 (nnmbox-possibly-change-newsgroup group server)
385 ;; Delete all articles in GROUP.
386 (if (not force)
387 () ; Don't delete the articles.
388 (with-current-buffer nnmbox-mbox-buffer
389 (goto-char (point-min))
390 ;; Delete all articles in this group.
391 (let ((ident (concat "\nX-Gnus-Newsgroup: " nnmbox-current-group ":"))
392 found)
393 (while (search-forward ident nil t)
394 (setq found t)
395 (nnmbox-delete-mail))
396 (when found
397 (nnmbox-save-buffer)))))
398 ;; Remove the group from all structures.
399 (setq nnmbox-group-alist
400 (delq (assoc group nnmbox-group-alist) nnmbox-group-alist)
401 nnmbox-current-group nil)
402 ;; Save the active file.
403 (nnmbox-save-active nnmbox-group-alist nnmbox-active-file)
406 (deffoo nnmbox-request-rename-group (group new-name &optional server)
407 (nnmbox-possibly-change-newsgroup group server)
408 (with-current-buffer nnmbox-mbox-buffer
409 (goto-char (point-min))
410 (let ((ident (concat "\nX-Gnus-Newsgroup: " nnmbox-current-group ":"))
411 (new-ident (concat "\nX-Gnus-Newsgroup: " new-name ":"))
412 found)
413 (while (search-forward ident nil t)
414 (replace-match new-ident t t)
415 (setq found t))
416 (when found
417 (nnmbox-save-buffer))))
418 (let ((entry (assoc group nnmbox-group-active-articles)))
419 (when entry
420 (setcar entry new-name)))
421 (let ((entry (assoc group nnmbox-group-alist)))
422 (when entry
423 (setcar entry new-name))
424 (setq nnmbox-current-group nil)
425 ;; Save the new group alist.
426 (nnmbox-save-active nnmbox-group-alist nnmbox-active-file)
430 ;;; Internal functions.
432 ;; If FORCE, delete article no matter how many X-Gnus-Newsgroup
433 ;; headers there are. If LEAVE-DELIM, don't delete the Unix mbox
434 ;; delimiter line.
435 (defun nnmbox-delete-mail (&optional force leave-delim)
436 ;; Delete the current X-Gnus-Newsgroup line.
437 ;; First delete record of active article, unless the article is being
438 ;; replaced, indicated by FORCE being non-nil.
439 (if (not force)
440 (nnmbox-record-deleted-article (nnmbox-article-group-number t)))
441 (or force
442 (gnus-delete-line))
443 ;; Beginning of the article.
444 (save-excursion
445 (save-restriction
446 (narrow-to-region
447 (prog2
448 (re-search-backward (concat "^" message-unix-mail-delimiter) nil t)
449 (if leave-delim (progn (forward-line 1) (point))
450 (match-beginning 0))
451 (forward-line 1))
452 (or (and (re-search-forward (concat "^" message-unix-mail-delimiter)
453 nil t)
454 (match-beginning 0))
455 (point-max)))
456 (goto-char (point-min))
457 ;; Only delete the article if no other group owns it as well.
458 (when (or force
459 (not (re-search-forward "^X-Gnus-Newsgroup: " nil t))
460 (search-backward "\n\n" nil t))
461 (delete-region (point-min) (point-max))))))
463 (defun nnmbox-possibly-change-newsgroup (newsgroup &optional server)
464 (when (and server
465 (not (nnmbox-server-opened server)))
466 (nnmbox-open-server server))
467 (when (or (not nnmbox-mbox-buffer)
468 (not (buffer-name nnmbox-mbox-buffer)))
469 (nnmbox-read-mbox))
470 (when (not nnmbox-group-alist)
471 (nnmail-activate 'nnmbox))
472 (if newsgroup
473 (when (assoc newsgroup nnmbox-group-alist)
474 (setq nnmbox-current-group newsgroup))
477 (defun nnmbox-article-string (article)
478 (if (numberp article)
479 (concat "\nX-Gnus-Newsgroup: " nnmbox-current-group ":"
480 (int-to-string article) " ")
481 (concat "\nMessage-ID: " article)))
483 (defun nnmbox-article-group-number (this-line)
484 (save-excursion
485 (if this-line
486 (beginning-of-line)
487 (goto-char (point-min)))
488 (when (re-search-forward "^X-Gnus-Newsgroup: +\\([^:]+\\):\\([0-9]+\\) "
489 nil t)
490 (cons (buffer-substring (match-beginning 1) (match-end 1))
491 (string-to-number
492 (buffer-substring (match-beginning 2) (match-end 2)))))))
494 (defun nnmbox-in-header-p (pos)
495 "Return non-nil if POS is in the header of an article."
496 (save-excursion
497 (goto-char pos)
498 (re-search-backward (concat "^" message-unix-mail-delimiter) nil t)
499 (search-forward "\n\n" nil t)
500 (< pos (point))))
502 (defun nnmbox-find-article (article)
503 "Leaves point on the relevant X-Gnus-Newsgroup line if found."
504 ;; Check that article is in the active range first, to avoid an
505 ;; expensive exhaustive search if it isn't.
506 (if (and (numberp article)
507 (not (nnmbox-is-article-active-p article)))
509 (let ((art-string (nnmbox-article-string article))
510 (found nil))
511 ;; There is the possibility that the X-Gnus-Newsgroup line appears
512 ;; in the body of an article (for instance, if an article has been
513 ;; forwarded from someone using Gnus as their mailer), so check
514 ;; that the line is actually part of the article header.
515 (or (and (search-forward art-string nil t)
516 (nnmbox-in-header-p (point)))
517 (progn
518 (goto-char (point-min))
519 (while (and (not found)
520 (search-forward art-string nil t))
521 (setq found (nnmbox-in-header-p (point))))
522 found)))))
524 (defun nnmbox-record-active-article (group-art)
525 (let* ((group (car group-art))
526 (article (cdr group-art))
527 (entry
528 (or (assoc group nnmbox-group-active-articles)
529 (progn
530 (push (list group)
531 nnmbox-group-active-articles)
532 (car nnmbox-group-active-articles)))))
533 ;; add article to index, either by building complete list
534 ;; in reverse order, or as a list of ranges.
535 (if (not nnmbox-group-building-active-articles)
536 (setcdr entry (gnus-add-to-range (cdr entry) (list article)))
537 (when (memq article (cdr entry))
538 (switch-to-buffer nnmbox-mbox-buffer)
539 (error "Article %s:%d already exists!" group article))
540 (when (and (cadr entry) (< article (cadr entry)))
541 (switch-to-buffer nnmbox-mbox-buffer)
542 (error "Article %s:%d out of order" group article))
543 (setcdr entry (cons article (cdr entry))))))
545 (defun nnmbox-record-deleted-article (group-art)
546 (let* ((group (car group-art))
547 (article (cdr group-art))
548 (entry
549 (or (assoc group nnmbox-group-active-articles)
550 (progn
551 (push (list group)
552 nnmbox-group-active-articles)
553 (car nnmbox-group-active-articles)))))
554 ;; remove article from index
555 (setcdr entry (gnus-remove-from-range (cdr entry) (list article)))))
557 (defun nnmbox-is-article-active-p (article)
558 (gnus-member-of-range
559 article
560 (cdr (assoc nnmbox-current-group
561 nnmbox-group-active-articles))))
563 (defun nnmbox-save-mail (group-art)
564 "Called narrowed to an article."
565 (let ((delim (concat "^" message-unix-mail-delimiter)))
566 (goto-char (point-min))
567 ;; This might come from somewhere else.
568 (if (looking-at delim)
569 (forward-line 1)
570 (insert "From nobody " (current-time-string) "\n"))
571 ;; Quote all "From " lines in the article.
572 (while (re-search-forward delim nil t)
573 (goto-char (match-beginning 0))
574 (insert ">")))
575 (goto-char (point-max))
576 (unless (bolp)
577 (insert "\n"))
578 (nnmail-insert-lines)
579 (nnmail-insert-xref group-art)
580 (nnmbox-insert-newsgroup-line group-art)
581 (let ((alist group-art))
582 (while alist
583 (nnmbox-record-active-article (car alist))
584 (setq alist (cdr alist))))
585 (run-hooks 'nnmail-prepare-save-mail-hook)
586 (run-hooks 'nnmbox-prepare-save-mail-hook)
587 group-art)
589 (defun nnmbox-insert-newsgroup-line (group-art)
590 (save-excursion
591 (goto-char (point-min))
592 (when (search-forward "\n\n" nil t)
593 (forward-char -1)
594 (while group-art
595 (insert (format "X-Gnus-Newsgroup: %s:%d %s\n"
596 (caar group-art) (cdar group-art)
597 (current-time-string)))
598 (setq group-art (cdr group-art))))
601 (defun nnmbox-active-number (group)
602 ;; Find the next article number in GROUP.
603 (let ((active (cadr (assoc group nnmbox-group-alist))))
604 (if active
605 (setcdr active (1+ (cdr active)))
606 ;; This group is new, so we create a new entry for it.
607 ;; This might be a bit naughty... creating groups on the drop of
608 ;; a hat, but I don't know...
609 (push (list group (setq active (cons 1 1)))
610 nnmbox-group-alist))
611 (cdr active)))
613 (defun nnmbox-create-mbox ()
614 (when (not (file-exists-p nnmbox-mbox-file))
615 (let ((nnmail-file-coding-system
616 (or nnmbox-file-coding-system-for-write
617 nnmbox-file-coding-system))
618 (dir (file-name-directory nnmbox-mbox-file)))
619 (and dir (gnus-make-directory dir))
620 (nnmail-write-region (point-min) (point-min)
621 nnmbox-mbox-file t 'nomesg))))
623 (defun nnmbox-read-mbox ()
624 (nnmail-activate 'nnmbox)
625 (nnmbox-create-mbox)
626 (if (and nnmbox-mbox-buffer
627 (buffer-name nnmbox-mbox-buffer)
628 (with-current-buffer nnmbox-mbox-buffer
629 (= (buffer-size) (nnheader-file-size nnmbox-mbox-file))))
631 (save-excursion
632 (let ((delim (concat "^" message-unix-mail-delimiter))
633 (alist nnmbox-group-alist)
634 (nnmbox-group-building-active-articles t)
635 start end end-header number)
636 (set-buffer (setq nnmbox-mbox-buffer
637 (let ((nnheader-file-coding-system
638 nnmbox-file-coding-system))
639 (nnheader-find-file-noselect
640 nnmbox-mbox-file t t))))
641 (mm-enable-multibyte)
642 (buffer-disable-undo)
643 (gnus-add-buffer)
645 ;; Go through the group alist and compare against the mbox file.
646 (while alist
647 (goto-char (point-max))
648 (when (and (re-search-backward
649 (format "^X-Gnus-Newsgroup: %s:\\([0-9]+\\) "
650 (caar alist)) nil t)
651 (> (setq number
652 (string-to-number
653 (buffer-substring
654 (match-beginning 1) (match-end 1))))
655 (cdadar alist)))
656 (setcdr (cadar alist) number))
657 (setq alist (cdr alist)))
659 ;; Examine all articles for our private X-Gnus-Newsgroup
660 ;; headers. This is done primarily as a consistency check, but
661 ;; it is convenient for building an index of the articles
662 ;; present, to avoid costly searches for missing articles
663 ;; (eg. when expiring articles).
664 (goto-char (point-min))
665 (setq nnmbox-group-active-articles nil)
666 (while (re-search-forward delim nil t)
667 (setq start (match-beginning 0))
668 (save-excursion
669 (search-forward "\n\n" nil t)
670 (setq end-header (point))
671 (setq end (or (and
672 (re-search-forward delim nil t)
673 (match-beginning 0))
674 (point-max))))
675 (if (search-forward "\nX-Gnus-Newsgroup: " end-header t)
676 ;; Build a list of articles in each group, remembering
677 ;; that each article may be in more than one group.
678 (progn
679 (nnmbox-record-active-article (nnmbox-article-group-number t))
680 (while (search-forward "\nX-Gnus-Newsgroup: " end-header t)
681 (nnmbox-record-active-article (nnmbox-article-group-number t))))
682 ;; The article is either new, or for some other reason
683 ;; hasn't got our private headers, so add them now. The
684 ;; only situation I've encountered when the X-Gnus-Newsgroup
685 ;; header is missing is if the article contains a forwarded
686 ;; message which does contain that header line (earlier
687 ;; versions of Gnus didn't restrict their search to the
688 ;; headers). In this case, there is an Xref line which
689 ;; provides the relevant information to construct the
690 ;; missing header(s).
691 (save-excursion
692 (save-restriction
693 (narrow-to-region start end)
694 (if (re-search-forward "\nXref: [^ ]+" end-header t)
695 ;; generate headers from Xref:
696 (let (alist)
697 (while (re-search-forward " \\([^:]+\\):\\([0-9]+\\)" end-header t)
698 (push (cons (match-string 1)
699 (string-to-number (match-string 2))) alist))
700 (nnmbox-insert-newsgroup-line alist))
701 ;; this is really a new article
702 (nnmbox-save-mail
703 (nnmail-article-group 'nnmbox-active-number))))))
704 (goto-char end))
705 ;; put article lists in order
706 (setq alist nnmbox-group-active-articles)
707 (while alist
708 (setcdr (car alist) (gnus-compress-sequence (nreverse (cdar alist))))
709 (setq alist (cdr alist)))))))
711 (provide 'nnmbox)
713 ;;; nnmbox.el ends here