1 ;;; nnmh.el --- mhspool access for Gnus
2 ;; Copyright (C) 1995,96,97 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
5 ;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
6 ;; Keywords: news, mail
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
27 ;; Based on nnspool.el by Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>.
28 ;; For an overview of what the interface functions do, please see the
37 (eval-when-compile (require 'cl))
41 (defvoo nnmh-directory message-directory
42 "*Mail spool directory.")
44 (defvoo nnmh-get-new-mail t
45 "*If non-nil, nnmh will check the incoming mail file and split the mail.")
47 (defvoo nnmh-prepare-save-mail-hook nil
48 "*Hook run narrowed to an article before saving.")
50 (defvoo nnmh-be-safe nil
51 "*If non-nil, nnmh will check all articles to make sure whether they are new or not.")
55 (defconst nnmh-version "nnmh 1.0"
58 (defvoo nnmh-current-directory nil
59 "Current news group directory.")
61 (defvoo nnmh-status-string "")
62 (defvoo nnmh-group-alist nil)
66 ;;; Interface functions.
68 (nnoo-define-basics nnmh)
70 (deffoo nnmh-retrieve-headers (articles &optional newsgroup server fetch-old)
72 (set-buffer nntp-server-buffer)
75 (number (length articles))
76 (large (and (numberp nnmail-large-newsgroup)
77 (> number nnmail-large-newsgroup)))
79 ;; 1997/8/12 by MORIOKA Tomohiko
81 (pathname-coding-system 'binary)
83 (nnmh-possibly-change-directory newsgroup server)
84 ;; We don't support fetching by Message-ID.
85 (if (stringp (car articles))
88 (when (and (file-exists-p
89 (setq file (concat (file-name-as-directory
90 nnmh-current-directory)
92 (setq article (pop articles))))))
93 (not (file-directory-p file)))
94 (insert (format "221 %d Article retrieved.\n" article))
96 (nnheader-insert-head file)
98 (if (search-forward "\n\n" nil t)
100 (goto-char (point-max))
103 (delete-region (point) (point-max)))
104 (setq count (1+ count))
108 (message "nnmh: Receiving headers... %d%%"
109 (/ (* count 100) number))))
112 (message "nnmh: Receiving headers...done"))
114 (nnheader-fold-continuation-lines)
117 (deffoo nnmh-open-server (server &optional defs)
118 (nnoo-change-server 'nnmh server defs)
119 (when (not (file-exists-p nnmh-directory))
121 (make-directory nnmh-directory t)
124 ((not (file-exists-p nnmh-directory))
126 (nnheader-report 'nnmh "Couldn't create directory: %s" nnmh-directory))
127 ((not (file-directory-p (file-truename nnmh-directory)))
129 (nnheader-report 'nnmh "Not a directory: %s" nnmh-directory))
131 (nnheader-report 'nnmh "Opened server %s using directory %s"
132 server nnmh-directory)
135 (deffoo nnmh-request-article (id &optional newsgroup server buffer)
136 (nnmh-possibly-change-directory newsgroup server)
137 (let ((file (if (stringp id)
139 (concat nnmh-current-directory (int-to-string id))))
140 ;; 1997/8/12 by MORIOKA Tomohiko
142 (pathname-coding-system 'binary)
143 (nntp-server-buffer (or buffer nntp-server-buffer)))
146 (not (file-directory-p file))
147 (save-excursion (nnmail-find-file file))
148 (string-to-int (file-name-nondirectory file)))))
150 (deffoo nnmh-request-group (group &optional server dont-check)
151 (let ((pathname (nnmail-group-pathname group nnmh-directory))
152 ;; 1997/8/12 by MORIOKA Tomohiko
154 (pathname-coding-system 'binary)
157 ((not (file-directory-p pathname))
159 'nnmh "Can't select group (no such directory): %s" group))
161 (setq nnmh-current-directory pathname)
162 (and nnmh-get-new-mail
164 (nnmh-update-gnus-unreads group))
167 (nnheader-report 'nnmh "Selected group %s" group)
170 ;; Re-scan the directory if it's on a foreign system.
171 (nnheader-re-read-dir pathname)
174 (mapcar (lambda (name) (string-to-int name))
175 (directory-files pathname nil "^[0-9]+$" t))
179 (nnheader-report 'nnmh "Selected group %s" group)
181 "211 %d %d %d %s\n" (length dir) (car dir)
182 (progn (while (cdr dir) (setq dir (cdr dir))) (car dir))
185 (nnheader-report 'nnmh "Empty group %s" group)
186 (nnheader-insert (format "211 0 1 0 %s\n" group))))))))))
188 (deffoo nnmh-request-scan (&optional group server)
189 (nnmail-get-new-mail 'nnmh nil nnmh-directory group))
191 (deffoo nnmh-request-list (&optional server dir)
193 (let ((pathname-coding-system 'binary)
195 (file-truename (or dir (file-name-as-directory nnmh-directory)))))
196 (nnmh-request-list-1 nnmh-toplev))
197 (setq nnmh-group-alist (nnmail-get-active))
201 (defun nnmh-request-list-1 (dir)
202 (setq dir (expand-file-name dir))
203 ;; Recurse down all directories.
204 (let ((dirs (and (file-readable-p dir)
205 (> (nth 1 (file-attributes (file-chase-links dir))) 2)
206 (directory-files dir t nil t)))
208 ;; Recurse down directories.
209 (while (setq dir (pop dirs))
210 (when (and (not (member (file-name-nondirectory dir) '("." "..")))
211 (file-directory-p dir)
212 (file-readable-p dir))
213 (nnmh-request-list-1 dir))))
214 ;; For each directory, generate an active file line.
215 (unless (string= (expand-file-name nnmh-toplev) dir)
217 (lambda (name) (string-to-int name))
218 (directory-files dir nil "^[0-9]+$" t))))
221 (set-buffer nntp-server-buffer)
222 (goto-char (point-max))
229 (file-truename (file-name-as-directory
230 (expand-file-name nnmh-toplev))))
232 (nnheader-replace-chars-in-string
233 (decode-coding-string (substring dir (match-end 0))
234 nnmail-pathname-coding-system)
237 (apply 'min files)))))))
240 (deffoo nnmh-request-newgroups (date &optional server)
241 (nnmh-request-list server))
243 (deffoo nnmh-request-expire-articles (articles newsgroup
244 &optional server force)
245 (nnmh-possibly-change-directory newsgroup server)
246 (let* ((active-articles
250 (string-to-int name)))
251 (directory-files nnmh-current-directory nil "^[0-9]+$" t)))
253 article rest mod-time)
254 (nnmail-activate 'nnmh)
256 (while (and articles is-old)
257 (setq article (concat nnmh-current-directory
258 (int-to-string (car articles))))
259 (when (setq mod-time (nth 5 (file-attributes article)))
260 (if (and (nnmh-deletable-article-p newsgroup (car articles))
262 (nnmail-expired-article-p newsgroup mod-time force)))
264 (nnheader-message 5 "Deleting article %s in %s..."
267 (funcall nnmail-delete-file-function article)
269 (nnheader-message 1 "Couldn't delete article %s in %s"
271 (push (car articles) rest))))
272 (push (car articles) rest)))
273 (setq articles (cdr articles)))
275 (nconc rest articles)))
277 (deffoo nnmh-close-group (group &optional server)
280 (deffoo nnmh-request-move-article
281 (article group server accept-form &optional last)
282 (let ((buf (get-buffer-create " *nnmh move*"))
285 (nnmh-deletable-article-p group article)
286 (nnmh-request-article article group server)
290 (insert-buffer-substring nntp-server-buffer)
291 (setq result (eval accept-form))
292 (kill-buffer (current-buffer))
295 (nnmh-possibly-change-directory group server)
297 (funcall nnmail-delete-file-function
298 (concat nnmh-current-directory (int-to-string article)))
302 (deffoo nnmh-request-accept-article (group &optional server last noinsert)
303 (nnmh-possibly-change-directory group server)
304 (nnmail-check-syntax)
305 (when nnmail-cache-accepted-message-ids
306 (nnmail-cache-insert (nnmail-fetch-field "message-id")))
310 (nnmail-activate 'nnmh)
312 (list (cons group (nnmh-active-number group)))
315 (nnmail-activate 'nnmh)
316 (let ((res (nnmail-article-group 'nnmh-active-number)))
318 (yes-or-no-p "Moved to `junk' group; delete article? "))
320 (car (nnmh-save-mail res noinsert))))))
321 (when (and last nnmail-cache-accepted-message-ids)
322 (nnmail-cache-close))))
324 (deffoo nnmh-request-replace-article (article group buffer)
325 (nnmh-possibly-change-directory group)
328 (nnmh-possibly-create-directory group)
331 (point-min) (point-max)
332 (concat nnmh-current-directory (int-to-string article))
333 nil (if (nnheader-be-verbose 5) nil 'nomesg))
336 (deffoo nnmh-request-create-group (group &optional server args)
337 (nnmail-activate 'nnmh)
338 (unless (assoc group nnmh-group-alist)
340 (push (list group (setq active (cons 1 0)))
342 (nnmh-possibly-create-directory group)
343 (nnmh-possibly-change-directory group server)
344 (let ((articles (mapcar
346 (string-to-int file))
348 nnmh-current-directory nil "^[0-9]+$"))))
350 (setcar active (apply 'min articles))
351 (setcdr active (apply 'max articles))))))
354 (deffoo nnmh-request-delete-group (group &optional force server)
355 (nnmh-possibly-change-directory group server)
356 ;; Delete all articles in GROUP.
358 () ; Don't delete the articles.
359 (let ((articles (directory-files nnmh-current-directory t "^[0-9]+$")))
361 (when (file-writable-p (car articles))
362 (nnheader-message 5 "Deleting article %s in %s..."
363 (car articles) group)
364 (funcall nnmail-delete-file-function (car articles)))
365 (setq articles (cdr articles))))
366 ;; Try to delete the directory itself.
368 (delete-directory nnmh-current-directory)))
369 ;; Remove the group from all structures.
370 (setq nnmh-group-alist
371 (delq (assoc group nnmh-group-alist) nnmh-group-alist)
372 nnmh-current-directory nil)
375 (deffoo nnmh-request-rename-group (group new-name &optional server)
376 (nnmh-possibly-change-directory group server)
377 (let ((new-dir (nnmail-group-pathname new-name nnmh-directory))
378 (old-dir (nnmail-group-pathname group nnmh-directory)))
380 (make-directory new-dir t)
382 ;; We move the articles file by file instead of renaming
383 ;; the directory -- there may be subgroups in this group.
384 ;; One might be more clever, I guess.
385 (let ((files (nnheader-article-to-file-alist old-dir)))
388 (concat old-dir (cdar files))
389 (concat new-dir (cdar files)))
391 (when (<= (length (directory-files old-dir)) 2)
393 (delete-directory old-dir)))
394 ;; That went ok, so we change the internal structures.
395 (let ((entry (assoc group nnmh-group-alist)))
397 (setcar entry new-name))
398 (setq nnmh-current-directory nil)
401 (nnoo-define-skeleton nnmh)
404 ;;; Internal functions.
406 (defun nnmh-possibly-change-directory (newsgroup &optional server)
408 (not (nnmh-server-opened server)))
409 (nnmh-open-server server))
411 (let ((pathname (nnmail-group-pathname newsgroup nnmh-directory))
412 ;; 1997/8/12 by MORIOKA Tomohiko
414 (pathname-coding-system 'binary))
415 (if (file-directory-p pathname)
416 (setq nnmh-current-directory pathname)
417 (error "No such newsgroup: %s" newsgroup)))))
419 (defun nnmh-possibly-create-directory (group)
421 (setq dir (nnmail-group-pathname group nnmh-directory))
422 (while (not (file-directory-p dir))
424 (setq dir (file-name-directory (directory-file-name dir))))
426 (when (make-directory (directory-file-name (car dirs)))
427 (error "Could not create directory %s" (car dirs)))
428 (nnheader-message 5 "Creating mail directory %s" (car dirs))
429 (setq dirs (cdr dirs)))))
431 (defun nnmh-save-mail (group-art &optional noinsert)
432 "Called narrowed to an article."
434 (nnmail-insert-lines)
435 (nnmail-insert-xref group-art))
436 (run-hooks 'nnmail-prepare-save-mail-hook)
437 (run-hooks 'nnmh-prepare-save-mail-hook)
438 (goto-char (point-min))
439 (while (looking-at "From ")
440 (replace-match "X-From-Line: ")
442 ;; We save the article in all the newsgroups it belongs in.
446 (nnmh-possibly-create-directory (caar ga))
447 (let ((file (concat (nnmail-group-pathname
448 (caar ga) nnmh-directory)
449 (int-to-string (cdar ga)))))
451 ;; It was already saved, so we just make a hard link.
452 (funcall nnmail-crosspost-link-function first file t)
454 (nnmail-write-region (point-min) (point-max) file nil nil)
459 (defun nnmh-active-number (group)
460 "Compute the next article number in GROUP."
461 (let ((active (cadr (assoc group nnmh-group-alist)))
462 (dir (nnmail-group-pathname group nnmh-directory))
463 ;; 1997/8/14 by MORIOKA Tomohiko
465 (pathname-coding-system 'binary))
467 ;; The group wasn't known to nnmh, so we just create an active
469 (setq active (cons 1 0))
470 (push (list group active) nnmh-group-alist)
471 (unless (file-exists-p dir)
472 (make-directory dir))
473 ;; Find the highest number in the group.
478 (directory-files dir nil "^[0-9]+$"))
481 (setcdr active (car files)))))
482 (setcdr active (1+ (cdr active)))
483 (while (file-exists-p
484 (concat (nnmail-group-pathname group nnmh-directory)
485 (int-to-string (cdr active))))
486 (setcdr active (1+ (cdr active))))
489 (defun nnmh-update-gnus-unreads (group)
490 ;; Go through the .nnmh-articles file and compare with the actual
491 ;; articles in this folder. The articles that are "new" will be
492 ;; marked as unread by Gnus.
493 (let* ((dir nnmh-current-directory)
494 (files (sort (mapcar (function (lambda (name) (string-to-int name)))
495 (directory-files nnmh-current-directory
498 (nnmh-file (concat dir ".nnmh-articles"))
500 ;; Load the .nnmh-articles file.
501 (when (file-exists-p nnmh-file)
503 (let (nnmh-newsgroup-articles)
504 (ignore-errors (load nnmh-file nil t t))
505 nnmh-newsgroup-articles)))
506 ;; Add all new articles to the `new' list.
509 (unless (assq (car art) articles)
510 (push (car art) new))
511 (setq art (cdr art))))
512 ;; Remove all deleted articles.
513 (let ((art articles))
515 (unless (memq (caar art) files)
516 (setq articles (delq (car art) articles)))
517 (setq art (cdr art))))
518 ;; Check whether the articles really are the ones that Gnus thinks
519 ;; they are by looking at the time-stamps.
520 (let ((arts articles)
522 (while (setq art (pop arts))
524 (nth 5 (file-attributes
525 (concat dir (int-to-string (car art)))))
527 (setq articles (delq art articles))
528 (push (car art) new))))
529 ;; Go through all the new articles and add them, and their
530 ;; time-stamps, to the list.
536 (nth 5 (file-attributes
537 (concat dir (int-to-string art))))))
539 ;; Make Gnus mark all new articles as unread.
541 (gnus-make-articles-unread
542 (gnus-group-prefixed-name group (list 'nnmh ""))
543 (setq new (sort new '<))))
544 ;; Sort the article list with highest numbers first.
545 (setq articles (sort articles (lambda (art1 art2)
546 (> (car art1) (car art2)))))
547 ;; Finally write this list back to the .nnmh-articles file.
548 (nnheader-temp-write nnmh-file
549 (insert ";; Gnus article active file for " group "\n\n")
550 (insert "(setq nnmh-newsgroup-articles '")
551 (gnus-prin1 articles)
554 (defun nnmh-deletable-article-p (group article)
555 "Say whether ARTICLE in GROUP can be deleted."
556 (let ((path (concat nnmh-current-directory (int-to-string article))))
558 (and (file-writable-p path)
559 ;; We can never delete the last article in the group.
560 (not (eq (cdr (nth 1 (assoc group nnmh-group-alist)))
565 ;;; nnmh.el ends here