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]+$" t))
174 (nnheader-report 'nnmh "Selected group %s" group)
176 "211 %d %d %d %s\n" (length dir) (car dir)
177 (progn (while (cdr dir) (setq dir (cdr dir))) (car dir))
180 (nnheader-report 'nnmh "Empty group %s" group)
181 (nnheader-insert (format "211 0 1 0 %s\n" group))))))))))
183 (deffoo nnmh-request-scan (&optional group server)
184 (nnmail-get-new-mail 'nnmh nil nnmh-directory group))
186 (deffoo nnmh-request-list (&optional server dir)
188 (let ((pathname-coding-system 'binary)
190 (file-truename (or dir (file-name-as-directory nnmh-directory)))))
191 (nnmh-request-list-1 nnmh-toplev))
192 (setq nnmh-group-alist (nnmail-get-active))
196 (defun nnmh-request-list-1 (dir)
197 (setq dir (expand-file-name dir))
198 ;; Recurse down all directories.
199 (let ((dirs (and (file-readable-p dir)
200 (> (nth 1 (file-attributes (file-chase-links dir))) 2)
201 (directory-files dir t nil t)))
203 ;; Recurse down directories.
204 (while (setq dir (pop dirs))
205 (when (and (not (member (file-name-nondirectory dir) '("." "..")))
206 (file-directory-p dir)
207 (file-readable-p dir))
208 (nnmh-request-list-1 dir))))
209 ;; For each directory, generate an active file line.
210 (unless (string= (expand-file-name nnmh-toplev) dir)
212 (lambda (name) (string-to-int name))
213 (directory-files dir nil "^[0-9]+$" t))))
216 (set-buffer nntp-server-buffer)
217 (goto-char (point-max))
224 (file-truename (file-name-as-directory
225 (expand-file-name nnmh-toplev))))
227 (nnheader-replace-chars-in-string
228 (gnus-decode-coding-string (substring dir (match-end 0))
229 nnmail-pathname-coding-system)
232 (apply 'min files)))))))
235 (deffoo nnmh-request-newgroups (date &optional server)
236 (nnmh-request-list server))
238 (deffoo nnmh-request-expire-articles (articles newsgroup
239 &optional server force)
240 (nnmh-possibly-change-directory newsgroup server)
241 (let* ((active-articles
245 (string-to-int name)))
246 (directory-files nnmh-current-directory nil "^[0-9]+$" t)))
248 article rest mod-time)
249 (nnmail-activate 'nnmh)
251 (while (and articles is-old)
252 (setq article (concat nnmh-current-directory
253 (int-to-string (car articles))))
254 (when (setq mod-time (nth 5 (file-attributes article)))
255 (if (and (nnmh-deletable-article-p newsgroup (car articles))
257 (nnmail-expired-article-p newsgroup mod-time force)))
259 (nnheader-message 5 "Deleting article %s in %s..."
262 (funcall nnmail-delete-file-function article)
264 (nnheader-message 1 "Couldn't delete article %s in %s"
266 (push (car articles) rest))))
267 (push (car articles) rest)))
268 (setq articles (cdr articles)))
270 (nconc rest articles)))
272 (deffoo nnmh-close-group (group &optional server)
275 (deffoo nnmh-request-move-article
276 (article group server accept-form &optional last)
277 (let ((buf (get-buffer-create " *nnmh move*"))
280 (nnmh-deletable-article-p group article)
281 (nnmh-request-article article group server)
285 (insert-buffer-substring nntp-server-buffer)
286 (setq result (eval accept-form))
287 (kill-buffer (current-buffer))
290 (nnmh-possibly-change-directory group server)
292 (funcall nnmail-delete-file-function
293 (concat nnmh-current-directory (int-to-string article)))
297 (deffoo nnmh-request-accept-article (group &optional server last noinsert)
298 (nnmh-possibly-change-directory group server)
299 (nnmail-check-syntax)
300 (when nnmail-cache-accepted-message-ids
301 (nnmail-cache-insert (nnmail-fetch-field "message-id")))
305 (nnmail-activate 'nnmh)
307 (nnmh-active-number group)
309 (list (cons group (nnmh-active-number group)))
312 (nnmail-activate 'nnmh)
313 (let ((res (nnmail-article-group 'nnmh-active-number)))
315 (yes-or-no-p "Moved to `junk' group; delete article? "))
317 (car (nnmh-save-mail res noinsert))))))
318 (when (and last nnmail-cache-accepted-message-ids)
319 (nnmail-cache-close))))
321 (deffoo nnmh-request-replace-article (article group buffer)
322 (nnmh-possibly-change-directory group)
325 (nnmh-possibly-create-directory group)
328 (point-min) (point-max)
329 (concat nnmh-current-directory (int-to-string article))
330 nil (if (nnheader-be-verbose 5) nil 'nomesg))
333 (deffoo nnmh-request-create-group (group &optional server args)
334 (nnmail-activate 'nnmh)
335 (unless (assoc group nnmh-group-alist)
337 (push (list group (setq active (cons 1 0)))
339 (nnmh-possibly-create-directory group)
340 (nnmh-possibly-change-directory group server)
341 (let ((articles (mapcar
343 (string-to-int file))
345 nnmh-current-directory nil "^[0-9]+$"))))
347 (setcar active (apply 'min articles))
348 (setcdr active (apply 'max articles))))))
351 (deffoo nnmh-request-delete-group (group &optional force server)
352 (nnmh-possibly-change-directory group server)
353 ;; Delete all articles in GROUP.
355 () ; Don't delete the articles.
356 (let ((articles (directory-files nnmh-current-directory t "^[0-9]+$")))
358 (when (file-writable-p (car articles))
359 (nnheader-message 5 "Deleting article %s in %s..."
360 (car articles) group)
361 (funcall nnmail-delete-file-function (car articles)))
362 (setq articles (cdr articles))))
363 ;; Try to delete the directory itself.
365 (delete-directory nnmh-current-directory)))
366 ;; Remove the group from all structures.
367 (setq nnmh-group-alist
368 (delq (assoc group nnmh-group-alist) nnmh-group-alist)
369 nnmh-current-directory nil)
372 (deffoo nnmh-request-rename-group (group new-name &optional server)
373 (nnmh-possibly-change-directory group server)
374 (let ((new-dir (nnmail-group-pathname new-name nnmh-directory))
375 (old-dir (nnmail-group-pathname group nnmh-directory)))
377 (make-directory new-dir t)
379 ;; We move the articles file by file instead of renaming
380 ;; the directory -- there may be subgroups in this group.
381 ;; One might be more clever, I guess.
382 (let ((files (nnheader-article-to-file-alist old-dir)))
385 (concat old-dir (cdar files))
386 (concat new-dir (cdar files)))
388 (when (<= (length (directory-files old-dir)) 2)
390 (delete-directory old-dir)))
391 ;; That went ok, so we change the internal structures.
392 (let ((entry (assoc group nnmh-group-alist)))
394 (setcar entry new-name))
395 (setq nnmh-current-directory nil)
398 (nnoo-define-skeleton nnmh)
401 ;;; Internal functions.
403 (defun nnmh-possibly-change-directory (newsgroup &optional server)
405 (not (nnmh-server-opened server)))
406 (nnmh-open-server server))
408 (let ((pathname (nnmail-group-pathname newsgroup nnmh-directory))
409 (pathname-coding-system 'binary))
410 (if (file-directory-p pathname)
411 (setq nnmh-current-directory pathname)
412 (error "No such newsgroup: %s" newsgroup)))))
414 (defun nnmh-possibly-create-directory (group)
416 (setq dir (nnmail-group-pathname group nnmh-directory))
417 (while (not (file-directory-p dir))
419 (setq dir (file-name-directory (directory-file-name dir))))
421 (when (make-directory (directory-file-name (car dirs)))
422 (error "Could not create directory %s" (car dirs)))
423 (nnheader-message 5 "Creating mail directory %s" (car dirs))
424 (setq dirs (cdr dirs)))))
426 (defun nnmh-save-mail (group-art &optional noinsert)
427 "Called narrowed to an article."
429 (nnmail-insert-lines)
430 (nnmail-insert-xref group-art))
431 (run-hooks 'nnmail-prepare-save-mail-hook)
432 (run-hooks 'nnmh-prepare-save-mail-hook)
433 (goto-char (point-min))
434 (while (looking-at "From ")
435 (replace-match "X-From-Line: ")
437 ;; We save the article in all the newsgroups it belongs in.
441 (nnmh-possibly-create-directory (caar ga))
442 (let ((file (concat (nnmail-group-pathname
443 (caar ga) nnmh-directory)
444 (int-to-string (cdar ga)))))
446 ;; It was already saved, so we just make a hard link.
447 (funcall nnmail-crosspost-link-function first file t)
449 (nnmail-write-region (point-min) (point-max) file nil nil)
454 (defun nnmh-active-number (group)
455 "Compute the next article number in GROUP."
456 (let ((active (cadr (assoc group nnmh-group-alist)))
457 (dir (nnmail-group-pathname group nnmh-directory))
458 (pathname-coding-system 'binary))
460 ;; The group wasn't known to nnmh, so we just create an active
462 (setq active (cons 1 0))
463 (push (list group active) nnmh-group-alist)
464 (unless (file-exists-p dir)
465 (make-directory dir))
466 ;; Find the highest number in the group.
471 (directory-files dir nil "^[0-9]+$"))
474 (setcdr active (car files)))))
475 (setcdr active (1+ (cdr active)))
476 (while (file-exists-p
477 (concat (nnmail-group-pathname group nnmh-directory)
478 (int-to-string (cdr active))))
479 (setcdr active (1+ (cdr active))))
482 (defun nnmh-update-gnus-unreads (group)
483 ;; Go through the .nnmh-articles file and compare with the actual
484 ;; articles in this folder. The articles that are "new" will be
485 ;; marked as unread by Gnus.
486 (let* ((dir nnmh-current-directory)
487 (files (sort (mapcar (function (lambda (name) (string-to-int name)))
488 (directory-files nnmh-current-directory
491 (nnmh-file (concat dir ".nnmh-articles"))
493 ;; Load the .nnmh-articles file.
494 (when (file-exists-p nnmh-file)
496 (let (nnmh-newsgroup-articles)
497 (ignore-errors (load nnmh-file nil t t))
498 nnmh-newsgroup-articles)))
499 ;; Add all new articles to the `new' list.
502 (unless (assq (car art) articles)
503 (push (car art) new))
504 (setq art (cdr art))))
505 ;; Remove all deleted articles.
506 (let ((art articles))
508 (unless (memq (caar art) files)
509 (setq articles (delq (car art) articles)))
510 (setq art (cdr art))))
511 ;; Check whether the articles really are the ones that Gnus thinks
512 ;; they are by looking at the time-stamps.
513 (let ((arts articles)
515 (while (setq art (pop arts))
517 (nth 5 (file-attributes
518 (concat dir (int-to-string (car art)))))
520 (setq articles (delq art articles))
521 (push (car art) new))))
522 ;; Go through all the new articles and add them, and their
523 ;; time-stamps, to the list.
529 (nth 5 (file-attributes
530 (concat dir (int-to-string art))))))
532 ;; Make Gnus mark all new articles as unread.
534 (gnus-make-articles-unread
535 (gnus-group-prefixed-name group (list 'nnmh ""))
536 (setq new (sort new '<))))
537 ;; Sort the article list with highest numbers first.
538 (setq articles (sort articles (lambda (art1 art2)
539 (> (car art1) (car art2)))))
540 ;; Finally write this list back to the .nnmh-articles file.
541 (nnheader-temp-write nnmh-file
542 (insert ";; Gnus article active file for " group "\n\n")
543 (insert "(setq nnmh-newsgroup-articles '")
544 (gnus-prin1 articles)
547 (defun nnmh-deletable-article-p (group article)
548 "Say whether ARTICLE in GROUP can be deleted."
549 (let ((path (concat nnmh-current-directory (int-to-string article))))
551 (and (file-writable-p path)
553 ;; We can never delete the last article in the group.
554 (not (eq (cdr (nth 1 (assoc group nnmh-group-alist)))
557 nnmh-allow-delete-final))))
561 ;;; nnmh.el ends here