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)
63 (defvoo nnmh-allow-delete-final nil)
67 ;;; Interface functions.
69 (nnoo-define-basics nnmh)
71 (deffoo nnmh-retrieve-headers (articles &optional newsgroup server fetch-old)
73 (set-buffer nntp-server-buffer)
76 (number (length articles))
77 (large (and (numberp nnmail-large-newsgroup)
78 (> number nnmail-large-newsgroup)))
80 (pathname-coding-system 'binary)
82 (nnmh-possibly-change-directory newsgroup server)
83 ;; We don't support fetching by Message-ID.
84 (if (stringp (car articles))
87 (when (and (file-exists-p
88 (setq file (concat (file-name-as-directory
89 nnmh-current-directory)
91 (setq article (pop articles))))))
92 (not (file-directory-p file)))
93 (insert (format "221 %d Article retrieved.\n" article))
95 (nnheader-insert-head file)
97 (if (search-forward "\n\n" nil t)
99 (goto-char (point-max))
102 (delete-region (point) (point-max)))
103 (setq count (1+ count))
107 (message "nnmh: Receiving headers... %d%%"
108 (/ (* count 100) number))))
111 (message "nnmh: Receiving headers...done"))
113 (nnheader-fold-continuation-lines)
116 (deffoo nnmh-open-server (server &optional defs)
117 (nnoo-change-server 'nnmh server defs)
118 (when (not (file-exists-p nnmh-directory))
120 (make-directory nnmh-directory t)
123 ((not (file-exists-p nnmh-directory))
125 (nnheader-report 'nnmh "Couldn't create directory: %s" nnmh-directory))
126 ((not (file-directory-p (file-truename nnmh-directory)))
128 (nnheader-report 'nnmh "Not a directory: %s" nnmh-directory))
130 (nnheader-report 'nnmh "Opened server %s using directory %s"
131 server nnmh-directory)
134 (deffoo nnmh-request-article (id &optional newsgroup server buffer)
135 (nnmh-possibly-change-directory newsgroup server)
136 (let ((file (if (stringp id)
138 (concat nnmh-current-directory (int-to-string id))))
139 (pathname-coding-system 'binary)
140 (nntp-server-buffer (or buffer nntp-server-buffer)))
143 (not (file-directory-p file))
144 (save-excursion (nnmail-find-file file))
145 (string-to-int (file-name-nondirectory file)))))
147 (deffoo nnmh-request-group (group &optional server dont-check)
148 (let ((pathname (nnmail-group-pathname group nnmh-directory))
149 (pathname-coding-system 'binary)
152 ((not (file-directory-p pathname))
154 'nnmh "Can't select group (no such directory): %s" group))
156 (setq nnmh-current-directory pathname)
157 (and nnmh-get-new-mail
159 (nnmh-update-gnus-unreads group))
162 (nnheader-report 'nnmh "Selected group %s" group)
165 ;; Re-scan the directory if it's on a foreign system.
166 (nnheader-re-read-dir pathname)
169 (mapcar (lambda (name) (string-to-int name))
170 (directory-files pathname nil "^[0-9]+$" t))
174 (nnheader-report 'nnmh "Selected group %s" group)
176 "211 %d %d %d %s\n" (length dir) (car dir)
177 (progn (while (cdr dir) (setq dir (cdr dir))) (car dir))
180 (nnheader-report 'nnmh "Empty group %s" group)
181 (nnheader-insert (format "211 0 1 0 %s\n" group))))))))))
183 (deffoo nnmh-request-scan (&optional group server)
184 (nnmail-get-new-mail 'nnmh nil nnmh-directory group))
186 (deffoo nnmh-request-list (&optional server dir)
188 (let ((pathname-coding-system 'binary)
190 (file-truename (or dir (file-name-as-directory nnmh-directory)))))
191 (nnmh-request-list-1 nnmh-toplev))
192 (setq nnmh-group-alist (nnmail-get-active))
196 (defun nnmh-request-list-1 (dir)
197 (setq dir (expand-file-name dir))
198 ;; Recurse down all directories.
199 (let ((dirs (and (file-readable-p dir)
200 (> (nth 1 (file-attributes (file-chase-links dir))) 2)
201 (directory-files dir t nil t)))
203 ;; Recurse down directories.
204 (while (setq rdir (pop dirs))
205 (when (and (not (member (file-name-nondirectory rdir) '("." "..")))
206 (file-directory-p rdir)
207 (file-readable-p rdir)
208 (equal (file-truename rdir)
209 (file-truename dir)))
210 (nnmh-request-list-1 rdir))))
211 ;; For each directory, generate an active file line.
212 (unless (string= (expand-file-name nnmh-toplev) dir)
214 (lambda (name) (string-to-int name))
215 (directory-files dir nil "^[0-9]+$" t))))
218 (set-buffer nntp-server-buffer)
219 (goto-char (point-max))
226 (file-truename (file-name-as-directory
227 (expand-file-name nnmh-toplev))))
229 (nnheader-replace-chars-in-string
230 (gnus-decode-coding-string (substring dir (match-end 0))
231 nnmail-pathname-coding-system)
234 (apply 'min files)))))))
237 (deffoo nnmh-request-newgroups (date &optional server)
238 (nnmh-request-list server))
240 (deffoo nnmh-request-expire-articles (articles newsgroup
241 &optional server force)
242 (nnmh-possibly-change-directory newsgroup server)
243 (let* ((active-articles
247 (string-to-int name)))
248 (directory-files nnmh-current-directory nil "^[0-9]+$" t)))
250 article rest mod-time)
251 (nnmail-activate 'nnmh)
253 (while (and articles is-old)
254 (setq article (concat nnmh-current-directory
255 (int-to-string (car articles))))
256 (when (setq mod-time (nth 5 (file-attributes article)))
257 (if (and (nnmh-deletable-article-p newsgroup (car articles))
259 (nnmail-expired-article-p newsgroup mod-time force)))
261 (nnheader-message 5 "Deleting article %s in %s..."
264 (funcall nnmail-delete-file-function article)
266 (nnheader-message 1 "Couldn't delete article %s in %s"
268 (push (car articles) rest))))
269 (push (car articles) rest)))
270 (setq articles (cdr articles)))
272 (nconc rest articles)))
274 (deffoo nnmh-close-group (group &optional server)
277 (deffoo nnmh-request-move-article
278 (article group server accept-form &optional last)
279 (let ((buf (get-buffer-create " *nnmh move*"))
282 (nnmh-deletable-article-p group article)
283 (nnmh-request-article article group server)
287 (insert-buffer-substring nntp-server-buffer)
288 (setq result (eval accept-form))
289 (kill-buffer (current-buffer))
292 (nnmh-possibly-change-directory group server)
294 (funcall nnmail-delete-file-function
295 (concat nnmh-current-directory (int-to-string article)))
299 (deffoo nnmh-request-accept-article (group &optional server last noinsert)
300 (nnmh-possibly-change-directory group server)
301 (nnmail-check-syntax)
302 (when nnmail-cache-accepted-message-ids
303 (nnmail-cache-insert (nnmail-fetch-field "message-id")))
307 (nnmail-activate 'nnmh)
309 (nnmh-active-number group)
311 (list (cons group (nnmh-active-number group)))
314 (nnmail-activate 'nnmh)
315 (let ((res (nnmail-article-group 'nnmh-active-number)))
317 (yes-or-no-p "Moved to `junk' group; delete article? "))
319 (car (nnmh-save-mail res noinsert))))))
320 (when (and last nnmail-cache-accepted-message-ids)
321 (nnmail-cache-close))))
323 (deffoo nnmh-request-replace-article (article group buffer)
324 (nnmh-possibly-change-directory group)
327 (nnmh-possibly-create-directory group)
330 (point-min) (point-max)
331 (concat nnmh-current-directory (int-to-string article))
332 nil (if (nnheader-be-verbose 5) nil 'nomesg))
335 (deffoo nnmh-request-create-group (group &optional server args)
336 (nnmail-activate 'nnmh)
337 (unless (assoc group nnmh-group-alist)
339 (push (list group (setq active (cons 1 0)))
341 (nnmh-possibly-create-directory group)
342 (nnmh-possibly-change-directory group server)
343 (let ((articles (mapcar
345 (string-to-int file))
347 nnmh-current-directory nil "^[0-9]+$"))))
349 (setcar active (apply 'min articles))
350 (setcdr active (apply 'max articles))))))
353 (deffoo nnmh-request-delete-group (group &optional force server)
354 (nnmh-possibly-change-directory group server)
355 ;; Delete all articles in GROUP.
357 () ; Don't delete the articles.
358 (let ((articles (directory-files nnmh-current-directory t "^[0-9]+$")))
360 (when (file-writable-p (car articles))
361 (nnheader-message 5 "Deleting article %s in %s..."
362 (car articles) group)
363 (funcall nnmail-delete-file-function (car articles)))
364 (setq articles (cdr articles))))
365 ;; Try to delete the directory itself.
367 (delete-directory nnmh-current-directory)))
368 ;; Remove the group from all structures.
369 (setq nnmh-group-alist
370 (delq (assoc group nnmh-group-alist) nnmh-group-alist)
371 nnmh-current-directory nil)
374 (deffoo nnmh-request-rename-group (group new-name &optional server)
375 (nnmh-possibly-change-directory group server)
376 (let ((new-dir (nnmail-group-pathname new-name nnmh-directory))
377 (old-dir (nnmail-group-pathname group nnmh-directory)))
379 (make-directory new-dir t)
381 ;; We move the articles file by file instead of renaming
382 ;; the directory -- there may be subgroups in this group.
383 ;; One might be more clever, I guess.
384 (let ((files (nnheader-article-to-file-alist old-dir)))
387 (concat old-dir (cdar files))
388 (concat new-dir (cdar files)))
390 (when (<= (length (directory-files old-dir)) 2)
392 (delete-directory old-dir)))
393 ;; That went ok, so we change the internal structures.
394 (let ((entry (assoc group nnmh-group-alist)))
396 (setcar entry new-name))
397 (setq nnmh-current-directory nil)
400 (nnoo-define-skeleton nnmh)
403 ;;; Internal functions.
405 (defun nnmh-possibly-change-directory (newsgroup &optional server)
407 (not (nnmh-server-opened server)))
408 (nnmh-open-server server))
410 (let ((pathname (nnmail-group-pathname newsgroup nnmh-directory))
411 (pathname-coding-system 'binary))
412 (if (file-directory-p pathname)
413 (setq nnmh-current-directory pathname)
414 (error "No such newsgroup: %s" newsgroup)))))
416 (defun nnmh-possibly-create-directory (group)
418 (setq dir (nnmail-group-pathname group nnmh-directory))
419 (while (not (file-directory-p dir))
421 (setq dir (file-name-directory (directory-file-name dir))))
423 (when (make-directory (directory-file-name (car dirs)))
424 (error "Could not create directory %s" (car dirs)))
425 (nnheader-message 5 "Creating mail directory %s" (car dirs))
426 (setq dirs (cdr dirs)))))
428 (defun nnmh-save-mail (group-art &optional noinsert)
429 "Called narrowed to an article."
431 (nnmail-insert-lines)
432 (nnmail-insert-xref group-art))
433 (run-hooks 'nnmail-prepare-save-mail-hook)
434 (run-hooks 'nnmh-prepare-save-mail-hook)
435 (goto-char (point-min))
436 (while (looking-at "From ")
437 (replace-match "X-From-Line: ")
439 ;; We save the article in all the newsgroups it belongs in.
443 (nnmh-possibly-create-directory (caar ga))
444 (let ((file (concat (nnmail-group-pathname
445 (caar ga) nnmh-directory)
446 (int-to-string (cdar ga)))))
448 ;; It was already saved, so we just make a hard link.
449 (funcall nnmail-crosspost-link-function first file t)
451 (nnmail-write-region (point-min) (point-max) file nil nil)
456 (defun nnmh-active-number (group)
457 "Compute the next article number in GROUP."
458 (let ((active (cadr (assoc group nnmh-group-alist)))
459 (dir (nnmail-group-pathname group nnmh-directory))
460 (pathname-coding-system 'binary))
462 ;; The group wasn't known to nnmh, so we just create an active
464 (setq active (cons 1 0))
465 (push (list group active) nnmh-group-alist)
466 (unless (file-exists-p dir)
467 (make-directory dir))
468 ;; Find the highest number in the group.
473 (directory-files dir nil "^[0-9]+$"))
476 (setcdr active (car files)))))
477 (setcdr active (1+ (cdr active)))
478 (while (file-exists-p
479 (concat (nnmail-group-pathname group nnmh-directory)
480 (int-to-string (cdr active))))
481 (setcdr active (1+ (cdr active))))
484 (defun nnmh-update-gnus-unreads (group)
485 ;; Go through the .nnmh-articles file and compare with the actual
486 ;; articles in this folder. The articles that are "new" will be
487 ;; marked as unread by Gnus.
488 (let* ((dir nnmh-current-directory)
489 (files (sort (mapcar (function (lambda (name) (string-to-int name)))
490 (directory-files nnmh-current-directory
493 (nnmh-file (concat dir ".nnmh-articles"))
495 ;; Load the .nnmh-articles file.
496 (when (file-exists-p nnmh-file)
498 (let (nnmh-newsgroup-articles)
499 (ignore-errors (load nnmh-file nil t t))
500 nnmh-newsgroup-articles)))
501 ;; Add all new articles to the `new' list.
504 (unless (assq (car art) articles)
505 (push (car art) new))
506 (setq art (cdr art))))
507 ;; Remove all deleted articles.
508 (let ((art articles))
510 (unless (memq (caar art) files)
511 (setq articles (delq (car art) articles)))
512 (setq art (cdr art))))
513 ;; Check whether the articles really are the ones that Gnus thinks
514 ;; they are by looking at the time-stamps.
515 (let ((arts articles)
517 (while (setq art (pop arts))
519 (nth 5 (file-attributes
520 (concat dir (int-to-string (car art)))))
522 (setq articles (delq art articles))
523 (push (car art) new))))
524 ;; Go through all the new articles and add them, and their
525 ;; time-stamps, to the list.
531 (nth 5 (file-attributes
532 (concat dir (int-to-string art))))))
534 ;; Make Gnus mark all new articles as unread.
536 (gnus-make-articles-unread
537 (gnus-group-prefixed-name group (list 'nnmh ""))
538 (setq new (sort new '<))))
539 ;; Sort the article list with highest numbers first.
540 (setq articles (sort articles (lambda (art1 art2)
541 (> (car art1) (car art2)))))
542 ;; Finally write this list back to the .nnmh-articles file.
543 (nnheader-temp-write nnmh-file
544 (insert ";; Gnus article active file for " group "\n\n")
545 (insert "(setq nnmh-newsgroup-articles '")
546 (gnus-prin1 articles)
549 (defun nnmh-deletable-article-p (group article)
550 "Say whether ARTICLE in GROUP can be deleted."
551 (let ((path (concat nnmh-current-directory (int-to-string article))))
553 (and (file-writable-p path)
555 ;; We can never delete the last article in the group.
556 (not (eq (cdr (nth 1 (assoc group nnmh-group-alist)))
559 nnmh-allow-delete-final))))
563 ;;; nnmh.el ends here