1 ;;; nnmh.el --- mhspool access for Gnus
2 ;; Copyright (C) 1995,96,97,98,99 Free Software Foundation, Inc.
4 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
5 ;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
6 ;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
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 2, or (at your option)
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; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, USA.
28 ;; Based on nnspool.el by Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>.
29 ;; For an overview of what the interface functions do, please see the
34 (eval-when-compile (require 'cl))
35 (eval-when-compile (require 'gnus-clfns))
44 (defvoo nnmh-directory message-directory
45 "*Mail spool directory.")
47 (defvoo nnmh-get-new-mail t
48 "*If non-nil, nnmh will check the incoming mail file and split the mail.")
50 (defvoo nnmh-prepare-save-mail-hook nil
51 "*Hook run narrowed to an article before saving.")
53 (defvoo nnmh-be-safe nil
54 "*If non-nil, nnmh will check all articles to make sure whether they are new or not.
55 Go through the .nnmh-articles file and compare with the actual
56 articles in this folder. The articles that are \"new\" will be marked
61 (defconst nnmh-version "nnmh 1.0"
64 (defvoo nnmh-current-directory nil
65 "Current news group directory.")
67 (defvoo nnmh-status-string "")
68 (defvoo nnmh-group-alist nil)
69 ;; Don't even think about setting this variable. It does not exist.
70 ;; Forget about it. Uh-huh. Nope. Nobody here. It's only bound
71 ;; dynamically by certain functions in nndraft.
72 (defvar nnmh-allow-delete-final nil)
76 ;;; Interface functions.
78 (nnoo-define-basics nnmh)
80 (deffoo nnmh-retrieve-headers (articles &optional newsgroup server fetch-old)
82 (set-buffer nntp-server-buffer)
85 (number (length articles))
86 (large (and (numberp nnmail-large-newsgroup)
87 (> number nnmail-large-newsgroup)))
89 (pathname-coding-system 'binary)
91 (nnmh-possibly-change-directory newsgroup server)
92 ;; We don't support fetching by Message-ID.
93 (if (stringp (car articles))
96 (when (and (file-exists-p
97 (setq file (concat (file-name-as-directory
98 nnmh-current-directory)
100 (setq article (pop articles))))))
101 (not (file-directory-p file)))
102 (insert (format "221 %d Article retrieved.\n" article))
104 (nnheader-insert-head file)
106 (if (search-forward "\n\n" nil t)
108 (goto-char (point-max))
111 (delete-region (point) (point-max)))
112 (setq count (1+ count))
116 (nnheader-message 5 "nnmh: Receiving headers... %d%%"
117 (/ (* count 100) number))))
120 (nnheader-message 5 "nnmh: Receiving headers...done"))
122 ;; (nnheader-fold-continuation-lines)
125 (deffoo nnmh-retrieve-parsed-headers (articles
127 &optional newsgroup server fetch-old
130 (set-buffer nntp-server-buffer)
132 (number (length articles))
133 (large (and (numberp nnmail-large-newsgroup)
134 (> number nnmail-large-newsgroup)))
136 (pathname-coding-system 'binary)
140 headers header id end ref lines chars ctype in-reply-to
141 (cur (current-buffer)))
142 (nnmh-possibly-change-directory newsgroup server)
143 ;; We don't support fetching by Message-ID.
144 (nnheader-retrieve-headers-from-directory
145 articles nnmh-current-directory dependencies
146 fetch-old force-new large "nnmh")
149 (deffoo nnmh-open-server (server &optional defs)
150 (nnoo-change-server 'nnmh server defs)
151 (when (not (file-exists-p nnmh-directory))
153 (make-directory nnmh-directory t)
156 ((not (file-exists-p nnmh-directory))
158 (nnheader-report 'nnmh "Couldn't create directory: %s" nnmh-directory))
159 ((not (file-directory-p (file-truename nnmh-directory)))
161 (nnheader-report 'nnmh "Not a directory: %s" nnmh-directory))
163 (nnheader-report 'nnmh "Opened server %s using directory %s"
164 server nnmh-directory)
167 (deffoo nnmh-request-article (id &optional newsgroup server buffer)
168 (nnmh-possibly-change-directory newsgroup server)
169 (let ((file (if (stringp id)
171 (concat nnmh-current-directory (int-to-string id))))
172 (pathname-coding-system 'binary)
173 (nntp-server-buffer (or buffer nntp-server-buffer)))
176 (not (file-directory-p file))
177 (save-excursion (nnmail-find-file file))
178 (string-to-int (file-name-nondirectory file)))))
180 (deffoo nnmh-request-group (group &optional server dont-check)
181 (nnheader-init-server-buffer)
182 (nnmh-possibly-change-directory group server)
183 (let ((pathname (nnmail-group-pathname group nnmh-directory))
184 (pathname-coding-system 'binary)
187 ((not (file-directory-p pathname))
189 'nnmh "Can't select group (no such directory): %s" group))
191 (setq nnmh-current-directory pathname)
192 (and nnmh-get-new-mail
194 (nnmh-update-gnus-unreads group))
197 (nnheader-report 'nnmh "Selected group %s" group)
200 ;; Re-scan the directory if it's on a foreign system.
201 (nnheader-re-read-dir pathname)
204 (mapcar (lambda (name) (string-to-int name))
205 (directory-files pathname nil "^[0-9]+$" t))
209 (setq nnmh-group-alist
210 (delq (assoc group nnmh-group-alist) nnmh-group-alist))
211 (push (list group (cons (car dir) (car (last dir))))
213 (nnheader-report 'nnmh "Selected group %s" group)
215 "211 %d %d %d %s\n" (length dir) (car dir)
216 (car (last dir)) group))
218 (nnheader-report 'nnmh "Empty group %s" group)
219 (nnheader-insert (format "211 0 1 0 %s\n" group))))))))))
221 (deffoo nnmh-request-scan (&optional group server)
222 (nnmail-get-new-mail 'nnmh nil nnmh-directory group))
224 (deffoo nnmh-request-list (&optional server dir)
226 (nnmh-possibly-change-directory nil server)
227 (let ((pathname-coding-system 'binary)
229 (file-truename (or dir (file-name-as-directory nnmh-directory)))))
230 (nnmh-request-list-1 nnmh-toplev))
231 (setq nnmh-group-alist (nnmail-get-active))
235 (defun nnmh-request-list-1 (dir)
236 (setq dir (expand-file-name dir))
237 ;; Recurse down all directories.
238 (let ((dirs (and (file-readable-p dir)
239 (> (nth 1 (file-attributes (file-chase-links dir))) 2)
240 (nnheader-directory-files dir t nil t)))
242 ;; Recurse down directories.
243 (while (setq rdir (pop dirs))
244 (when (and (file-directory-p rdir)
245 (file-readable-p rdir)
246 (not (equal (file-truename rdir)
247 (file-truename dir))))
248 (nnmh-request-list-1 rdir))))
249 ;; For each directory, generate an active file line.
250 (unless (string= (expand-file-name nnmh-toplev) dir)
252 (lambda (name) (string-to-int name))
253 (directory-files dir nil "^[0-9]+$" t))))
256 (set-buffer nntp-server-buffer)
257 (goto-char (point-max))
264 (file-truename (file-name-as-directory
265 (expand-file-name nnmh-toplev))))
267 (nnheader-replace-chars-in-string
268 (decode-coding-string (substring dir (match-end 0))
269 nnmail-pathname-coding-system)
272 (apply 'min files)))))))
275 (deffoo nnmh-request-newgroups (date &optional server)
276 (nnmh-request-list server))
278 (deffoo nnmh-request-expire-articles (articles newsgroup
279 &optional server force)
280 (nnmh-possibly-change-directory newsgroup server)
282 article rest mod-time)
283 (nnheader-init-server-buffer)
285 (while (and articles is-old)
286 (setq article (concat nnmh-current-directory
287 (int-to-string (car articles))))
288 (when (setq mod-time (nth 5 (file-attributes article)))
289 (if (and (nnmh-deletable-article-p newsgroup (car articles))
291 (nnmail-expired-article-p newsgroup mod-time force)))
293 (nnheader-message 5 "Deleting article %s in %s..."
296 (funcall nnmail-delete-file-function article)
298 (nnheader-message 1 "Couldn't delete article %s in %s"
300 (push (car articles) rest))))
301 (push (car articles) rest)))
302 (setq articles (cdr articles)))
303 (nnheader-message 5 "")
304 (nconc rest articles)))
306 (deffoo nnmh-close-group (group &optional server)
309 (deffoo nnmh-request-move-article
310 (article group server accept-form &optional last)
311 (let ((buf (get-buffer-create " *nnmh move*"))
314 (nnmh-deletable-article-p group article)
315 (nnmh-request-article article group server)
319 (insert-buffer-substring nntp-server-buffer)
320 (setq result (eval accept-form))
321 (kill-buffer (current-buffer))
324 (nnmh-possibly-change-directory group server)
326 (funcall nnmail-delete-file-function
327 (concat nnmh-current-directory (int-to-string article)))
331 (deffoo nnmh-request-accept-article (group &optional server last noinsert)
332 (nnmh-possibly-change-directory group server)
333 (if (and (not (equal group "queue"))
334 (not (equal group "draft")))
335 (nnmail-check-syntax))
336 (when nnmail-cache-accepted-message-ids
337 (nnmail-cache-insert (nnmail-fetch-field "message-id")))
338 (nnheader-init-server-buffer)
342 (nnmh-active-number group)
344 (list (cons group (nnmh-active-number group)))
346 (let ((res (nnmail-article-group 'nnmh-active-number)))
348 (yes-or-no-p "Moved to `junk' group; delete article? "))
350 (car (nnmh-save-mail res noinsert)))))
351 (when (and last nnmail-cache-accepted-message-ids)
352 (nnmail-cache-close))))
354 (deffoo nnmh-request-replace-article (article group buffer)
355 (nnmh-possibly-change-directory group)
358 (nnmh-possibly-create-directory group)
361 (point-min) (point-max)
362 (concat nnmh-current-directory (int-to-string article))
363 nil (if (nnheader-be-verbose 5) nil 'nomesg))
366 (deffoo nnmh-request-create-group (group &optional server args)
367 (nnheader-init-server-buffer)
368 (unless (assoc group nnmh-group-alist)
370 (push (list group (setq active (cons 1 0)))
372 (nnmh-possibly-create-directory group)
373 (nnmh-possibly-change-directory group server)
374 (let ((articles (mapcar
376 (string-to-int file))
378 nnmh-current-directory nil "^[0-9]+$"))))
380 (setcar active (apply 'min articles))
381 (setcdr active (apply 'max articles))))))
384 (deffoo nnmh-request-delete-group (group &optional force server)
385 (nnmh-possibly-change-directory group server)
386 ;; Delete all articles in GROUP.
388 () ; Don't delete the articles.
389 (let ((articles (directory-files nnmh-current-directory t "^[0-9]+$")))
391 (when (file-writable-p (car articles))
392 (nnheader-message 5 "Deleting article %s in %s..."
393 (car articles) group)
394 (funcall nnmail-delete-file-function (car articles)))
395 (setq articles (cdr articles))))
396 ;; Try to delete the directory itself.
398 (delete-directory nnmh-current-directory)))
399 ;; Remove the group from all structures.
400 (setq nnmh-group-alist
401 (delq (assoc group nnmh-group-alist) nnmh-group-alist)
402 nnmh-current-directory nil)
405 (deffoo nnmh-request-rename-group (group new-name &optional server)
406 (nnmh-possibly-change-directory group server)
407 (let ((new-dir (nnmail-group-pathname new-name nnmh-directory))
408 (old-dir (nnmail-group-pathname group nnmh-directory)))
410 (make-directory new-dir t)
412 ;; We move the articles file by file instead of renaming
413 ;; the directory -- there may be subgroups in this group.
414 ;; One might be more clever, I guess.
415 (let ((files (nnheader-article-to-file-alist old-dir)))
418 (concat old-dir (cdar files))
419 (concat new-dir (cdar files)))
421 (when (<= (length (directory-files old-dir)) 2)
423 (delete-directory old-dir)))
424 ;; That went ok, so we change the internal structures.
425 (let ((entry (assoc group nnmh-group-alist)))
427 (setcar entry new-name))
428 (setq nnmh-current-directory nil)
431 (nnoo-define-skeleton nnmh)
434 ;;; Internal functions.
436 (defun nnmh-possibly-change-directory (newsgroup &optional server)
438 (not (nnmh-server-opened server)))
439 (nnmh-open-server server))
441 (let ((pathname (nnmail-group-pathname newsgroup nnmh-directory))
442 (pathname-coding-system 'binary))
443 (if (file-directory-p pathname)
444 (setq nnmh-current-directory pathname)
445 (error "No such newsgroup: %s" newsgroup)))))
447 (defun nnmh-possibly-create-directory (group)
449 (setq dir (nnmail-group-pathname group nnmh-directory))
450 (while (not (file-directory-p dir))
452 (setq dir (file-name-directory (directory-file-name dir))))
454 (when (make-directory (directory-file-name (car dirs)))
455 (error "Could not create directory %s" (car dirs)))
456 (nnheader-message 5 "Creating mail directory %s" (car dirs))
457 (setq dirs (cdr dirs)))))
459 (defun nnmh-save-mail (group-art &optional noinsert)
460 "Called narrowed to an article."
462 (nnmail-insert-lines)
463 (nnmail-insert-xref group-art))
464 (run-hooks 'nnmail-prepare-save-mail-hook)
465 (run-hooks 'nnmh-prepare-save-mail-hook)
466 (goto-char (point-min))
467 (while (looking-at "From ")
468 (replace-match "X-From-Line: ")
470 ;; We save the article in all the newsgroups it belongs in.
474 (nnmh-possibly-create-directory (caar ga))
475 (let ((file (concat (nnmail-group-pathname
476 (caar ga) nnmh-directory)
477 (int-to-string (cdar ga)))))
479 ;; It was already saved, so we just make a hard link.
480 (funcall nnmail-crosspost-link-function first file t)
482 (nnmail-write-region (point-min) (point-max) file nil nil)
487 (defun nnmh-active-number (group)
488 "Compute the next article number in GROUP."
489 (let ((active (cadr (assoc group nnmh-group-alist)))
490 (dir (nnmail-group-pathname group nnmh-directory))
491 (pathname-coding-system 'binary)
494 ;; The group wasn't known to nnmh, so we just create an active
496 (setq active (cons 1 0))
497 (push (list group active) nnmh-group-alist)
498 (unless (file-exists-p dir)
499 (gnus-make-directory dir))
500 ;; Find the highest number in the group.
505 (directory-files dir nil "^[0-9]+$"))
508 (setcdr active (car files)))))
509 (setcdr active (1+ (cdr active)))
511 ;; See whether the file exists...
513 (setq file (concat (nnmail-group-pathname group nnmh-directory)
514 (int-to-string (cdr active)))))
515 ;; ... or there is a buffer that will make that file exist
517 (get-file-buffer file))
518 ;; Skip past that file.
519 (setcdr active (1+ (cdr active))))
522 (defun nnmh-update-gnus-unreads (group)
523 ;; Go through the .nnmh-articles file and compare with the actual
524 ;; articles in this folder. The articles that are "new" will be
525 ;; marked as unread by Gnus.
526 (let* ((dir nnmh-current-directory)
527 (files (sort (mapcar (function (lambda (name) (string-to-int name)))
528 (directory-files nnmh-current-directory
531 (nnmh-file (concat dir ".nnmh-articles"))
533 ;; Load the .nnmh-articles file.
534 (when (file-exists-p nnmh-file)
536 (let (nnmh-newsgroup-articles)
537 (ignore-errors (load nnmh-file nil t t))
538 nnmh-newsgroup-articles)))
539 ;; Add all new articles to the `new' list.
542 (unless (assq (car art) articles)
543 (push (car art) new))
544 (setq art (cdr art))))
545 ;; Remove all deleted articles.
546 (let ((art articles))
548 (unless (memq (caar art) files)
549 (setq articles (delq (car art) articles)))
550 (setq art (cdr art))))
551 ;; Check whether the articles really are the ones that Gnus thinks
552 ;; they are by looking at the time-stamps.
553 (let ((arts articles)
555 (while (setq art (pop arts))
557 (nth 5 (file-attributes
558 (concat dir (int-to-string (car art)))))
560 (setq articles (delq art articles))
561 (push (car art) new))))
562 ;; Go through all the new articles and add them, and their
563 ;; time-stamps, to the list.
569 (nth 5 (file-attributes
570 (concat dir (int-to-string art))))))
572 ;; Make Gnus mark all new articles as unread.
574 (gnus-make-articles-unread
575 (gnus-group-prefixed-name group (list 'nnmh ""))
576 (setq new (sort new '<))))
577 ;; Sort the article list with highest numbers first.
578 (setq articles (sort articles (lambda (art1 art2)
579 (> (car art1) (car art2)))))
580 ;; Finally write this list back to the .nnmh-articles file.
581 (with-temp-file nnmh-file
582 (insert ";; Gnus article active file for " group "\n\n")
583 (insert "(setq nnmh-newsgroup-articles '")
584 (gnus-prin1 articles)
587 (defun nnmh-deletable-article-p (group article)
588 "Say whether ARTICLE in GROUP can be deleted."
589 (let ((path (concat nnmh-current-directory (int-to-string article))))
591 (and (file-writable-p path)
593 ;; We can never delete the last article in the group.
594 (not (eq (cdr (nth 1 (assoc group nnmh-group-alist)))
597 nnmh-allow-delete-final))))
601 ;;; nnmh.el ends here