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 ;; Keywords: news, mail
10 ;; This file is part of GNU Emacs.
12 ;; GNU Emacs is free software; you can redistribute it and/or modify
13 ;; it under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation; either version 2, or (at your option)
17 ;; GNU Emacs is distributed in the hope that it will be useful,
18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;; GNU General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs; see the file COPYING. If not, write to the
24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
25 ;; Boston, MA 02111-1307, USA.
29 ;; Based on nnspool.el by Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>.
30 ;; For an overview of what the interface functions do, please see the
39 (eval-when-compile (require 'cl))
43 (defvoo nnmh-directory message-directory
44 "Mail spool directory.")
46 (defvoo nnmh-get-new-mail t
47 "If non-nil, nnmh will check the incoming mail file and split the mail.")
49 (defvoo nnmh-prepare-save-mail-hook nil
50 "Hook run narrowed to an article before saving.")
52 (defvoo nnmh-be-safe nil
53 "If non-nil, nnmh will check all articles to make sure whether they are new or not.
54 Go through the .nnmh-articles file and compare with the actual
55 articles in this folder. The articles that are \"new\" will be marked
60 (defconst nnmh-version "nnmh 1.0"
63 (defvoo nnmh-current-directory nil
64 "Current news group directory.")
66 (defvoo nnmh-status-string "")
67 (defvoo nnmh-group-alist nil)
68 ;; Don't even think about setting this variable. It does not exist.
69 ;; Forget about it. Uh-huh. Nope. Nobody here. It's only bound
70 ;; dynamically by certain functions in nndraft.
71 (defvar nnmh-allow-delete-final nil)
75 ;;; Interface functions.
77 (nnoo-define-basics nnmh)
79 (deffoo nnmh-retrieve-headers (articles &optional newsgroup server fetch-old)
81 (set-buffer nntp-server-buffer)
84 (number (length articles))
85 (large (and (numberp nnmail-large-newsgroup)
86 (> number nnmail-large-newsgroup)))
88 (file-name-coding-system nnmail-pathname-coding-system)
90 (nnmh-possibly-change-directory newsgroup server)
91 ;; We don't support fetching by Message-ID.
92 (if (stringp (car articles))
95 (when (and (file-exists-p
96 (setq file (concat (file-name-as-directory
97 nnmh-current-directory)
99 (setq article (pop articles))))))
100 (not (file-directory-p file)))
101 (insert (format "221 %d Article retrieved.\n" article))
103 (nnheader-insert-head file)
105 (if (search-forward "\n\n" nil t)
107 (goto-char (point-max))
110 (delete-region (point) (point-max)))
111 (setq count (1+ count))
115 (nnheader-message 5 "nnmh: Receiving headers... %d%%"
116 (/ (* count 100) number))))
119 (nnheader-message 5 "nnmh: Receiving headers...done"))
121 (nnheader-fold-continuation-lines)
124 (deffoo nnmh-open-server (server &optional defs)
125 (nnoo-change-server 'nnmh server defs)
126 (when (not (file-exists-p nnmh-directory))
128 (make-directory nnmh-directory t)
131 ((not (file-exists-p nnmh-directory))
133 (nnheader-report 'nnmh "Couldn't create directory: %s" nnmh-directory))
134 ((not (file-directory-p (file-truename nnmh-directory)))
136 (nnheader-report 'nnmh "Not a directory: %s" nnmh-directory))
138 (nnheader-report 'nnmh "Opened server %s using directory %s"
139 server nnmh-directory)
142 (deffoo nnmh-request-article (id &optional newsgroup server buffer)
143 (nnmh-possibly-change-directory newsgroup server)
144 (let ((file (if (stringp id)
146 (concat nnmh-current-directory (int-to-string id))))
147 (file-name-coding-system nnmail-pathname-coding-system)
148 (nntp-server-buffer (or buffer nntp-server-buffer)))
151 (not (file-directory-p file))
152 (save-excursion (nnmail-find-file file))
153 (string-to-int (file-name-nondirectory file)))))
155 (deffoo nnmh-request-group (group &optional server dont-check)
156 (nnheader-init-server-buffer)
157 (nnmh-possibly-change-directory group server)
158 (let ((pathname (nnmail-group-pathname group nnmh-directory))
159 (file-name-coding-system nnmail-pathname-coding-system)
162 ((not (file-directory-p pathname))
164 'nnmh "Can't select group (no such directory): %s" group))
166 (setq nnmh-current-directory pathname)
167 (and nnmh-get-new-mail
169 (nnmh-update-gnus-unreads group))
172 (nnheader-report 'nnmh "Selected group %s" group)
175 ;; Re-scan the directory if it's on a foreign system.
176 (nnheader-re-read-dir pathname)
179 (mapcar (lambda (name) (string-to-int name))
180 (directory-files pathname nil "^[0-9]+$" t))
184 (setq nnmh-group-alist
185 (delq (assoc group nnmh-group-alist) nnmh-group-alist))
186 (push (list group (cons (car dir) (car (last dir))))
188 (nnheader-report 'nnmh "Selected group %s" group)
190 "211 %d %d %d %s\n" (length dir) (car dir)
191 (car (last dir)) group))
193 (nnheader-report 'nnmh "Empty group %s" group)
194 (nnheader-insert (format "211 0 1 0 %s\n" group))))))))))
196 (deffoo nnmh-request-scan (&optional group server)
197 (nnmail-get-new-mail 'nnmh nil nnmh-directory group))
199 (deffoo nnmh-request-list (&optional server dir)
201 (nnmh-possibly-change-directory nil server)
202 (let ((file-name-coding-system nnmail-pathname-coding-system)
204 (file-truename (or dir (file-name-as-directory nnmh-directory)))))
205 (nnmh-request-list-1 nnmh-toplev))
206 (setq nnmh-group-alist (nnmail-get-active))
210 (defun nnmh-request-list-1 (dir)
211 (setq dir (expand-file-name dir))
212 ;; Recurse down all directories.
213 (let ((dirs (and (file-readable-p dir)
214 (> (nth 1 (file-attributes (file-chase-links dir))) 2)
215 (nnheader-directory-files dir t nil t)))
217 ;; Recurse down directories.
218 (while (setq rdir (pop dirs))
219 (when (and (file-directory-p rdir)
220 (file-readable-p rdir)
221 (not (equal (file-truename rdir)
222 (file-truename dir))))
223 (nnmh-request-list-1 rdir))))
224 ;; For each directory, generate an active file line.
225 (unless (string= (expand-file-name nnmh-toplev) dir)
227 (lambda (name) (string-to-int name))
228 (directory-files dir nil "^[0-9]+$" t))))
231 (set-buffer nntp-server-buffer)
232 (goto-char (point-max))
239 (file-truename (file-name-as-directory
240 (expand-file-name nnmh-toplev))))
242 (mm-string-as-multibyte
243 (mm-encode-coding-string
244 (nnheader-replace-chars-in-string
245 (substring dir (match-end 0))
247 nnmail-pathname-coding-system)))
249 (apply 'min files)))))))
252 (deffoo nnmh-request-newgroups (date &optional server)
253 (nnmh-request-list server))
255 (deffoo nnmh-request-expire-articles (articles newsgroup
256 &optional server force)
257 (nnmh-possibly-change-directory newsgroup server)
259 article rest mod-time)
260 (nnheader-init-server-buffer)
262 (while (and articles is-old)
263 (setq article (concat nnmh-current-directory
264 (int-to-string (car articles))))
265 (when (setq mod-time (nth 5 (file-attributes article)))
266 (if (and (nnmh-deletable-article-p newsgroup (car articles))
268 (nnmail-expired-article-p newsgroup mod-time force)))
270 ;; Allow a special target group. -- jcn
271 (unless (eq nnmail-expiry-target 'delete)
273 (nnmh-request-article (car articles)
274 newsgroup server (current-buffer))
275 (nnmail-expiry-target-group
276 nnmail-expiry-target newsgroup)))
277 (nnheader-message 5 "Deleting article %s in %s..."
280 (funcall nnmail-delete-file-function article)
282 (nnheader-message 1 "Couldn't delete article %s in %s"
284 (push (car articles) rest))))
285 (push (car articles) rest)))
286 (setq articles (cdr articles)))
287 (nnheader-message 5 "")
288 (nconc rest articles)))
290 (deffoo nnmh-close-group (group &optional server)
293 (deffoo nnmh-request-move-article (article group server
294 accept-form &optional last)
295 (let ((buf (get-buffer-create " *nnmh move*"))
298 (nnmh-deletable-article-p group article)
299 (nnmh-request-article article group server)
303 (insert-buffer-substring nntp-server-buffer)
304 (setq result (eval accept-form))
305 (kill-buffer (current-buffer))
308 (nnmh-possibly-change-directory group server)
310 (funcall nnmail-delete-file-function
311 (concat nnmh-current-directory (int-to-string article)))
315 (deffoo nnmh-request-accept-article (group &optional server last noinsert)
316 (nnmh-possibly-change-directory group server)
317 (nnmail-check-syntax)
318 (when nnmail-cache-accepted-message-ids
319 (nnmail-cache-insert (nnmail-fetch-field "message-id")
321 (nnmail-fetch-field "subject")
322 (nnmail-fetch-field "from")))
323 (nnheader-init-server-buffer)
327 (nnmh-active-number group)
329 (list (cons group (nnmh-active-number group)))
331 (let ((res (nnmail-article-group 'nnmh-active-number)))
333 (yes-or-no-p "Moved to `junk' group; delete article? "))
335 (car (nnmh-save-mail res noinsert)))))
336 (when (and last nnmail-cache-accepted-message-ids)
337 (nnmail-cache-close))))
339 (deffoo nnmh-request-replace-article (article group buffer)
340 (nnmh-possibly-change-directory group)
343 (nnmh-possibly-create-directory group)
346 (point-min) (point-max)
347 (concat nnmh-current-directory (int-to-string article))
348 nil (if (nnheader-be-verbose 5) nil 'nomesg))
351 (deffoo nnmh-request-create-group (group &optional server args)
352 (nnheader-init-server-buffer)
353 (unless (assoc group nnmh-group-alist)
355 (push (list group (setq active (cons 1 0)))
357 (nnmh-possibly-create-directory group)
358 (nnmh-possibly-change-directory group server)
359 (let ((articles (mapcar
361 (string-to-int file))
363 nnmh-current-directory nil "^[0-9]+$"))))
365 (setcar active (apply 'min articles))
366 (setcdr active (apply 'max articles))))))
369 (deffoo nnmh-request-delete-group (group &optional force server)
370 (nnmh-possibly-change-directory group server)
371 ;; Delete all articles in GROUP.
373 () ; Don't delete the articles.
374 (let ((articles (directory-files nnmh-current-directory t "^[0-9]+$")))
376 (when (file-writable-p (car articles))
377 (nnheader-message 5 "Deleting article %s in %s..."
378 (car articles) group)
379 (funcall nnmail-delete-file-function (car articles)))
380 (setq articles (cdr articles))))
381 ;; Try to delete the directory itself.
383 (delete-directory nnmh-current-directory)))
384 ;; Remove the group from all structures.
385 (setq nnmh-group-alist
386 (delq (assoc group nnmh-group-alist) nnmh-group-alist)
387 nnmh-current-directory nil)
390 (deffoo nnmh-request-rename-group (group new-name &optional server)
391 (nnmh-possibly-change-directory group server)
392 (let ((new-dir (nnmail-group-pathname new-name nnmh-directory))
393 (old-dir (nnmail-group-pathname group nnmh-directory)))
395 (make-directory new-dir t)
397 ;; We move the articles file by file instead of renaming
398 ;; the directory -- there may be subgroups in this group.
399 ;; One might be more clever, I guess.
400 (let ((files (nnheader-article-to-file-alist old-dir)))
403 (concat old-dir (cdar files))
404 (concat new-dir (cdar files)))
406 (when (<= (length (directory-files old-dir)) 2)
408 (delete-directory old-dir)))
409 ;; That went ok, so we change the internal structures.
410 (let ((entry (assoc group nnmh-group-alist)))
412 (setcar entry new-name))
413 (setq nnmh-current-directory nil)
416 (nnoo-define-skeleton nnmh)
419 ;;; Internal functions.
421 (defun nnmh-possibly-change-directory (newsgroup &optional server)
423 (not (nnmh-server-opened server)))
424 (nnmh-open-server server))
426 (let ((pathname (nnmail-group-pathname newsgroup nnmh-directory))
427 (file-name-coding-system nnmail-pathname-coding-system))
428 (if (file-directory-p pathname)
429 (setq nnmh-current-directory pathname)
430 (nnheader-report 'nnmh "Not a directory: %s" nnmh-directory)))))
432 (defun nnmh-possibly-create-directory (group)
434 (setq dir (nnmail-group-pathname group nnmh-directory))
435 (while (not (file-directory-p dir))
437 (setq dir (file-name-directory (directory-file-name dir))))
439 (when (make-directory (directory-file-name (car dirs)))
440 (error "Could not create directory %s" (car dirs)))
441 (nnheader-message 5 "Creating mail directory %s" (car dirs))
442 (setq dirs (cdr dirs)))))
444 (defun nnmh-save-mail (group-art &optional noinsert)
445 "Called narrowed to an article."
447 (nnmail-insert-lines)
448 (nnmail-insert-xref group-art))
449 (run-hooks 'nnmail-prepare-save-mail-hook)
450 (run-hooks 'nnmh-prepare-save-mail-hook)
451 (goto-char (point-min))
452 (while (looking-at "From ")
453 (replace-match "X-From-Line: ")
455 ;; We save the article in all the newsgroups it belongs in.
459 (nnmh-possibly-create-directory (caar ga))
460 (let ((file (concat (nnmail-group-pathname
461 (caar ga) nnmh-directory)
462 (int-to-string (cdar ga)))))
464 ;; It was already saved, so we just make a hard link.
465 (funcall nnmail-crosspost-link-function first file t)
467 (nnmail-write-region (point-min) (point-max) file nil nil)
472 (defun nnmh-active-number (group)
473 "Compute the next article number in GROUP."
474 (let ((active (cadr (assoc group nnmh-group-alist)))
475 (dir (nnmail-group-pathname group nnmh-directory))
476 (file-name-coding-system nnmail-pathname-coding-system)
479 ;; The group wasn't known to nnmh, so we just create an active
481 (setq active (cons 1 0))
482 (push (list group active) nnmh-group-alist)
483 (unless (file-exists-p dir)
484 (gnus-make-directory dir))
485 ;; Find the highest number in the group.
490 (directory-files dir nil "^[0-9]+$"))
493 (setcdr active (car files)))))
494 (setcdr active (1+ (cdr active)))
496 ;; See whether the file exists...
498 (setq file (concat (nnmail-group-pathname group nnmh-directory)
499 (int-to-string (cdr active)))))
500 ;; ... or there is a buffer that will make that file exist
502 (get-file-buffer file))
503 ;; Skip past that file.
504 (setcdr active (1+ (cdr active))))
507 (defun nnmh-update-gnus-unreads (group)
508 ;; Go through the .nnmh-articles file and compare with the actual
509 ;; articles in this folder. The articles that are "new" will be
510 ;; marked as unread by Gnus.
511 (let* ((dir nnmh-current-directory)
512 (files (sort (mapcar (function (lambda (name) (string-to-int name)))
513 (directory-files nnmh-current-directory
516 (nnmh-file (concat dir ".nnmh-articles"))
518 ;; Load the .nnmh-articles file.
519 (when (file-exists-p nnmh-file)
521 (let (nnmh-newsgroup-articles)
522 (ignore-errors (load nnmh-file nil t t))
523 nnmh-newsgroup-articles)))
524 ;; Add all new articles to the `new' list.
527 (unless (assq (car art) articles)
528 (push (car art) new))
529 (setq art (cdr art))))
530 ;; Remove all deleted articles.
531 (let ((art articles))
533 (unless (memq (caar art) files)
534 (setq articles (delq (car art) articles)))
535 (setq art (cdr art))))
536 ;; Check whether the articles really are the ones that Gnus thinks
537 ;; they are by looking at the time-stamps.
538 (let ((arts articles)
540 (while (setq art (pop arts))
542 (nth 5 (file-attributes
543 (concat dir (int-to-string (car art)))))
545 (setq articles (delq art articles))
546 (push (car art) new))))
547 ;; Go through all the new articles and add them, and their
548 ;; time-stamps, to the list.
554 (nth 5 (file-attributes
555 (concat dir (int-to-string art))))))
557 ;; Make Gnus mark all new articles as unread.
559 (gnus-make-articles-unread
560 (gnus-group-prefixed-name group (list 'nnmh ""))
561 (setq new (sort new '<))))
562 ;; Sort the article list with highest numbers first.
563 (setq articles (sort articles (lambda (art1 art2)
564 (> (car art1) (car art2)))))
565 ;; Finally write this list back to the .nnmh-articles file.
566 (with-temp-file nnmh-file
567 (insert ";; Gnus article active file for " group "\n\n")
568 (insert "(setq nnmh-newsgroup-articles '")
569 (gnus-prin1 articles)
572 (defun nnmh-deletable-article-p (group article)
573 "Say whether ARTICLE in GROUP can be deleted."
574 (let ((path (concat nnmh-current-directory (int-to-string article))))
576 (and (file-writable-p path)
578 ;; We can never delete the last article in the group.
579 (not (eq (cdr (nth 1 (assoc group nnmh-group-alist)))
582 nnmh-allow-delete-final))))
586 ;;; nnmh.el ends here