1 ;;; nnmh.el --- mhspool access for Gnus
3 ;; Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2003
4 ;; Free Software Foundation, Inc.
6 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
7 ;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
8 ;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
9 ;; Keywords: news, mail
11 ;; This file is part of GNU Emacs.
13 ;; GNU Emacs is free software; you can redistribute it and/or modify
14 ;; it under the terms of the GNU General Public License as published by
15 ;; the Free Software Foundation; either version 2, or (at your option)
18 ;; GNU Emacs is distributed in the hope that it will be useful,
19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 ;; GNU General Public License for more details.
23 ;; You should have received a copy of the GNU General Public License
24 ;; along with GNU Emacs; see the file COPYING. If not, write to the
25 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
26 ;; Boston, MA 02111-1307, USA.
30 ;; Based on nnspool.el by Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>.
31 ;; For an overview of what the interface functions do, please see the
36 (eval-when-compile (require 'cl))
45 (defvoo nnmh-directory message-directory
46 "Mail spool directory.")
48 (defvoo nnmh-get-new-mail t
49 "If non-nil, nnmh will check the incoming mail file and split the mail.")
51 (defvoo nnmh-prepare-save-mail-hook nil
52 "Hook run narrowed to an article before saving.")
54 (defvoo nnmh-be-safe nil
55 "If non-nil, nnmh will check all articles to make sure whether they are new or not.
56 Go through the .nnmh-articles file and compare with the actual
57 articles in this folder. The articles that are \"new\" will be marked
62 (defconst nnmh-version "nnmh 1.0"
65 (defvoo nnmh-current-directory nil
66 "Current news group directory.")
68 (defvoo nnmh-status-string "")
69 (defvoo nnmh-group-alist nil)
70 ;; Don't even think about setting this variable. It does not exist.
71 ;; Forget about it. Uh-huh. Nope. Nobody here. It's only bound
72 ;; dynamically by certain functions in nndraft.
73 (defvar nnmh-allow-delete-final nil)
77 ;;; Interface functions.
79 (nnoo-define-basics nnmh)
81 (deffoo nnmh-retrieve-headers (articles &optional newsgroup server fetch-old)
83 (set-buffer nntp-server-buffer)
86 (number (length articles))
87 (large (and (numberp nnmail-large-newsgroup)
88 (> number nnmail-large-newsgroup)))
90 (file-name-coding-system nnmail-pathname-coding-system)
92 (nnmh-possibly-change-directory newsgroup server)
93 ;; We don't support fetching by Message-ID.
94 (if (stringp (car articles))
97 (when (and (file-exists-p
98 (setq file (concat (file-name-as-directory
99 nnmh-current-directory)
101 (setq article (pop articles))))))
102 (not (file-directory-p file)))
103 (insert (format "221 %d Article retrieved.\n" article))
105 (nnheader-insert-head file)
107 (if (search-forward "\n\n" nil t)
109 (goto-char (point-max))
112 (delete-region (point) (point-max)))
113 (setq count (1+ count))
117 (nnheader-message 5 "nnmh: Receiving headers... %d%%"
118 (/ (* count 100) number))))
121 (nnheader-message 5 "nnmh: Receiving headers...done"))
123 ;; (nnheader-fold-continuation-lines)
126 (deffoo nnmh-open-server (server &optional defs)
127 (nnoo-change-server 'nnmh server defs)
128 (when (not (file-exists-p nnmh-directory))
130 (make-directory nnmh-directory t)
133 ((not (file-exists-p nnmh-directory))
135 (nnheader-report 'nnmh "Couldn't create directory: %s" nnmh-directory))
136 ((not (file-directory-p (file-truename nnmh-directory)))
138 (nnheader-report 'nnmh "Not a directory: %s" nnmh-directory))
140 (nnheader-report 'nnmh "Opened server %s using directory %s"
141 server nnmh-directory)
144 (deffoo nnmh-request-article (id &optional newsgroup server buffer)
145 (nnmh-possibly-change-directory newsgroup server)
146 (let ((file (if (stringp id)
148 (concat nnmh-current-directory (int-to-string id))))
149 (file-name-coding-system nnmail-pathname-coding-system)
150 (nntp-server-buffer (or buffer nntp-server-buffer)))
153 (not (file-directory-p file))
154 (save-excursion (nnmail-find-file file))
155 (string-to-int (file-name-nondirectory file)))))
157 (deffoo nnmh-request-group (group &optional server dont-check)
158 (nnheader-init-server-buffer)
159 (nnmh-possibly-change-directory group server)
160 (let ((pathname (nnmail-group-pathname group nnmh-directory))
161 (file-name-coding-system nnmail-pathname-coding-system)
164 ((not (file-directory-p pathname))
166 'nnmh "Can't select group (no such directory): %s" group))
168 (setq nnmh-current-directory pathname)
169 (and nnmh-get-new-mail
171 (nnmh-update-gnus-unreads group))
174 (nnheader-report 'nnmh "Selected group %s" group)
177 ;; Re-scan the directory if it's on a foreign system.
178 (nnheader-re-read-dir pathname)
181 (mapcar (lambda (name) (string-to-int name))
182 (directory-files pathname nil "^[0-9]+$" t))
186 (setq nnmh-group-alist
187 (delq (assoc group nnmh-group-alist) nnmh-group-alist))
188 (push (list group (cons (car dir) (car (last dir))))
190 (nnheader-report 'nnmh "Selected group %s" group)
192 "211 %d %d %d %s\n" (length dir) (car dir)
193 (car (last dir)) group))
195 (nnheader-report 'nnmh "Empty group %s" group)
196 (nnheader-insert (format "211 0 1 0 %s\n" group))))))))))
198 (deffoo nnmh-request-scan (&optional group server)
199 (nnmail-get-new-mail 'nnmh nil nnmh-directory group))
201 (deffoo nnmh-request-list (&optional server dir)
203 (nnmh-possibly-change-directory nil server)
204 (let ((file-name-coding-system nnmail-pathname-coding-system)
206 (file-truename (or dir (file-name-as-directory nnmh-directory)))))
207 (nnmh-request-list-1 nnmh-toplev))
208 (setq nnmh-group-alist (nnmail-get-active))
212 (defun nnmh-request-list-1 (dir)
213 (setq dir (expand-file-name dir))
214 ;; Recurse down all directories.
215 (let ((dirs (and (file-readable-p dir)
216 (> (nth 1 (file-attributes (file-chase-links dir))) 2)
217 (nnheader-directory-files dir t nil t)))
219 ;; Recurse down directories.
220 (while (setq rdir (pop dirs))
221 (when (and (file-directory-p rdir)
222 (file-readable-p rdir)
223 (not (equal (file-truename rdir)
224 (file-truename dir))))
225 (nnmh-request-list-1 rdir))))
226 ;; For each directory, generate an active file line.
227 (unless (string= (expand-file-name nnmh-toplev) dir)
229 (lambda (name) (string-to-int name))
230 (directory-files dir nil "^[0-9]+$" t))))
233 (set-buffer nntp-server-buffer)
234 (goto-char (point-max))
241 (file-truename (file-name-as-directory
242 (expand-file-name nnmh-toplev))))
245 (encode-coding-string
246 (nnheader-replace-chars-in-string
247 (substring dir (match-end 0))
249 nnmail-pathname-coding-system)))
251 (apply 'min files)))))))
254 (deffoo nnmh-request-newgroups (date &optional server)
255 (nnmh-request-list server))
257 (deffoo nnmh-request-expire-articles (articles newsgroup
258 &optional server force)
259 (nnmh-possibly-change-directory newsgroup server)
261 article rest mod-time)
262 (nnheader-init-server-buffer)
264 (while (and articles is-old)
265 (setq article (concat nnmh-current-directory
266 (int-to-string (car articles))))
267 (when (setq mod-time (nth 5 (file-attributes article)))
268 (if (and (nnmh-deletable-article-p newsgroup (car articles))
270 (nnmail-expired-article-p newsgroup mod-time force)))
272 ;; Allow a special target group. -- jcn
273 (unless (eq nnmail-expiry-target 'delete)
275 (nnmh-request-article (car articles)
276 newsgroup server (current-buffer))
277 (nnmail-expiry-target-group
278 nnmail-expiry-target newsgroup)))
279 (nnheader-message 5 "Deleting article %s in %s..."
282 (funcall nnmail-delete-file-function article)
284 (nnheader-message 1 "Couldn't delete article %s in %s"
286 (push (car articles) rest))))
287 (push (car articles) rest)))
288 (setq articles (cdr articles)))
289 (nnheader-message 5 "")
290 (nconc rest articles)))
292 (deffoo nnmh-close-group (group &optional server)
295 (deffoo nnmh-request-move-article (article group server
296 accept-form &optional last)
297 (let ((buf (get-buffer-create " *nnmh move*"))
300 (nnmh-deletable-article-p group article)
301 (nnmh-request-article article group server)
305 (insert-buffer-substring nntp-server-buffer)
306 (setq result (eval accept-form))
307 (kill-buffer (current-buffer))
310 (nnmh-possibly-change-directory group server)
312 (funcall nnmail-delete-file-function
313 (concat nnmh-current-directory (int-to-string article)))
317 (deffoo nnmh-request-accept-article (group &optional server last noinsert)
318 (nnmh-possibly-change-directory group server)
319 (if (and (not (equal group "queue"))
320 (not (equal group "draft")))
321 (nnmail-check-syntax))
322 (when nnmail-cache-accepted-message-ids
323 (nnmail-cache-insert (nnmail-fetch-field "message-id")
325 (nnmail-fetch-field "subject")
326 (nnmail-fetch-field "from")))
327 (nnheader-init-server-buffer)
331 (nnmh-active-number group)
333 (list (cons group (nnmh-active-number group)))
335 (let ((res (nnmail-article-group 'nnmh-active-number)))
337 (yes-or-no-p "Moved to `junk' group; delete article? "))
339 (car (nnmh-save-mail res noinsert)))))
340 (when (and last nnmail-cache-accepted-message-ids)
341 (nnmail-cache-close))))
343 (deffoo nnmh-request-replace-article (article group buffer)
344 (nnmh-possibly-change-directory group)
347 (nnmh-possibly-create-directory group)
350 (point-min) (point-max)
351 (concat nnmh-current-directory (int-to-string article))
352 nil (if (nnheader-be-verbose 5) nil 'nomesg))
355 (deffoo nnmh-request-create-group (group &optional server args)
356 (nnheader-init-server-buffer)
357 (unless (assoc group nnmh-group-alist)
359 (push (list group (setq active (cons 1 0)))
361 (nnmh-possibly-create-directory group)
362 (nnmh-possibly-change-directory group server)
363 (let ((articles (mapcar
365 (string-to-int file))
367 nnmh-current-directory nil "^[0-9]+$"))))
369 (setcar active (apply 'min articles))
370 (setcdr active (apply 'max articles))))))
373 (deffoo nnmh-request-delete-group (group &optional force server)
374 (nnmh-possibly-change-directory group server)
375 ;; Delete all articles in GROUP.
377 () ; Don't delete the articles.
378 (let ((articles (directory-files nnmh-current-directory t "^[0-9]+$")))
380 (when (file-writable-p (car articles))
381 (nnheader-message 5 "Deleting article %s in %s..."
382 (car articles) group)
383 (funcall nnmail-delete-file-function (car articles)))
384 (setq articles (cdr articles))))
385 ;; Try to delete the directory itself.
387 (delete-directory nnmh-current-directory)))
388 ;; Remove the group from all structures.
389 (setq nnmh-group-alist
390 (delq (assoc group nnmh-group-alist) nnmh-group-alist)
391 nnmh-current-directory nil)
394 (deffoo nnmh-request-rename-group (group new-name &optional server)
395 (nnmh-possibly-change-directory group server)
396 (let ((new-dir (nnmail-group-pathname new-name nnmh-directory))
397 (old-dir (nnmail-group-pathname group nnmh-directory)))
399 (make-directory new-dir t)
401 ;; We move the articles file by file instead of renaming
402 ;; the directory -- there may be subgroups in this group.
403 ;; One might be more clever, I guess.
404 (let ((files (nnheader-article-to-file-alist old-dir)))
407 (concat old-dir (cdar files))
408 (concat new-dir (cdar files)))
410 (when (<= (length (directory-files old-dir)) 2)
412 (delete-directory old-dir)))
413 ;; That went ok, so we change the internal structures.
414 (let ((entry (assoc group nnmh-group-alist)))
416 (setcar entry new-name))
417 (setq nnmh-current-directory nil)
420 (nnoo-define-skeleton nnmh)
423 ;;; Internal functions.
425 (defun nnmh-possibly-change-directory (newsgroup &optional server)
427 (not (nnmh-server-opened server)))
428 (nnmh-open-server server))
430 (let ((pathname (nnmail-group-pathname newsgroup nnmh-directory))
431 (file-name-coding-system nnmail-pathname-coding-system))
432 (if (file-directory-p pathname)
433 (setq nnmh-current-directory pathname)
434 (nnheader-report 'nnmh "Not a directory: %s" nnmh-directory)))))
436 (defun nnmh-possibly-create-directory (group)
438 (setq dir (nnmail-group-pathname group nnmh-directory))
439 (while (not (file-directory-p dir))
441 (setq dir (file-name-directory (directory-file-name dir))))
443 (when (make-directory (directory-file-name (car dirs)))
444 (error "Could not create directory %s" (car dirs)))
445 (nnheader-message 5 "Creating mail directory %s" (car dirs))
446 (setq dirs (cdr dirs)))))
448 (defun nnmh-save-mail (group-art &optional noinsert)
449 "Called narrowed to an article."
451 (nnmail-insert-lines)
452 (nnmail-insert-xref group-art))
453 (run-hooks 'nnmail-prepare-save-mail-hook)
454 (run-hooks 'nnmh-prepare-save-mail-hook)
455 (goto-char (point-min))
456 (while (looking-at "From ")
457 (replace-match "X-From-Line: ")
459 ;; We save the article in all the newsgroups it belongs in.
463 (nnmh-possibly-create-directory (caar ga))
464 (let ((file (concat (nnmail-group-pathname
465 (caar ga) nnmh-directory)
466 (int-to-string (cdar ga)))))
468 ;; It was already saved, so we just make a hard link.
469 (funcall nnmail-crosspost-link-function first file t)
471 (nnmail-write-region (point-min) (point-max) file nil nil)
476 (defun nnmh-active-number (group)
477 "Compute the next article number in GROUP."
478 (let ((active (cadr (assoc group nnmh-group-alist)))
479 (dir (nnmail-group-pathname group nnmh-directory))
480 (file-name-coding-system nnmail-pathname-coding-system)
483 ;; The group wasn't known to nnmh, so we just create an active
485 (setq active (cons 1 0))
486 (push (list group active) nnmh-group-alist)
487 (unless (file-exists-p dir)
488 (gnus-make-directory dir))
489 ;; Find the highest number in the group.
494 (directory-files dir nil "^[0-9]+$"))
497 (setcdr active (car files)))))
498 (setcdr active (1+ (cdr active)))
500 ;; See whether the file exists...
502 (setq file (concat (nnmail-group-pathname group nnmh-directory)
503 (int-to-string (cdr active)))))
504 ;; ... or there is a buffer that will make that file exist
506 (get-file-buffer file))
507 ;; Skip past that file.
508 (setcdr active (1+ (cdr active))))
511 (defun nnmh-update-gnus-unreads (group)
512 ;; Go through the .nnmh-articles file and compare with the actual
513 ;; articles in this folder. The articles that are "new" will be
514 ;; marked as unread by Gnus.
515 (let* ((dir nnmh-current-directory)
516 (files (sort (mapcar (function (lambda (name) (string-to-int name)))
517 (directory-files nnmh-current-directory
520 (nnmh-file (concat dir ".nnmh-articles"))
522 ;; Load the .nnmh-articles file.
523 (when (file-exists-p nnmh-file)
525 (let (nnmh-newsgroup-articles)
526 (ignore-errors (load nnmh-file nil t t))
527 nnmh-newsgroup-articles)))
528 ;; Add all new articles to the `new' list.
531 (unless (assq (car art) articles)
532 (push (car art) new))
533 (setq art (cdr art))))
534 ;; Remove all deleted articles.
535 (let ((art articles))
537 (unless (memq (caar art) files)
538 (setq articles (delq (car art) articles)))
539 (setq art (cdr art))))
540 ;; Check whether the articles really are the ones that Gnus thinks
541 ;; they are by looking at the time-stamps.
542 (let ((arts articles)
544 (while (setq art (pop arts))
546 (nth 5 (file-attributes
547 (concat dir (int-to-string (car art)))))
549 (setq articles (delq art articles))
550 (push (car art) new))))
551 ;; Go through all the new articles and add them, and their
552 ;; time-stamps, to the list.
558 (nth 5 (file-attributes
559 (concat dir (int-to-string art))))))
561 ;; Make Gnus mark all new articles as unread.
563 (gnus-make-articles-unread
564 (gnus-group-prefixed-name group (list 'nnmh ""))
565 (setq new (sort new '<))))
566 ;; Sort the article list with highest numbers first.
567 (setq articles (sort articles (lambda (art1 art2)
568 (> (car art1) (car art2)))))
569 ;; Finally write this list back to the .nnmh-articles file.
570 (with-temp-file nnmh-file
571 (insert ";; Gnus article active file for " group "\n\n")
572 (insert "(setq nnmh-newsgroup-articles '")
573 (gnus-prin1 articles)
576 (defun nnmh-deletable-article-p (group article)
577 "Say whether ARTICLE in GROUP can be deleted."
578 (let ((path (concat nnmh-current-directory (int-to-string article))))
580 (and (file-writable-p path)
582 ;; We can never delete the last article in the group.
583 (not (eq (cdr (nth 1 (assoc group nnmh-group-alist)))
586 nnmh-allow-delete-final))))
590 ;;; nnmh.el ends here