1 ;;; nnmh.el --- mhspool access for Gnus
2 ;; Copyright (C) 1995,96 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
22 ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
26 ;; Based on nnspool.el by Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>.
27 ;; For an overview of what the interface functions do, please see the
36 (eval-and-compile (require 'cl))
38 (defvar nnmh-directory "~/Mail/"
39 "*Mail spool directory.")
41 (defvar nnmh-get-new-mail t
42 "*If non-nil, nnmh will check the incoming mail file and split the mail.")
44 (defvar nnmh-prepare-save-mail-hook nil
45 "*Hook run narrowed to an article before saving.")
47 (defvar nnmh-be-safe nil
48 "*If non-nil, nnmh will check all articles to make sure whether they are new or not.")
52 (defconst nnmh-version "nnmh 1.0"
55 (defvar nnmh-current-directory nil
56 "Current news group directory.")
58 (defvar nnmh-status-string "")
59 (defvar nnmh-group-alist nil)
63 (defvar nnmh-current-server nil)
64 (defvar nnmh-server-alist nil)
65 (defvar nnmh-server-variables
67 (list 'nnmh-directory nnmh-directory)
68 (list 'nnmh-get-new-mail nnmh-get-new-mail)
69 '(nnmh-current-directory nil)
70 '(nnmh-status-string "")
75 ;;; Interface functions.
77 (defun nnmh-retrieve-headers (articles &optional newsgroup server fetch-old)
79 (set-buffer nntp-server-buffer)
82 (number (length articles))
83 (large (and (numberp nnmail-large-newsgroup)
84 (> number nnmail-large-newsgroup)))
87 (nnmh-possibly-change-directory newsgroup)
88 ;; We don't support fetching by Message-ID.
89 (if (stringp (car articles))
92 (when (and (file-exists-p
93 (setq file (concat (file-name-as-directory
94 nnmh-current-directory)
96 (setq article (pop articles))))))
98 (not (file-directory-p file)))
99 (insert (format "221 %d Article retrieved.\n" article))
101 (nnheader-insert-head file)
103 (if (search-forward "\n\n" nil t)
105 (goto-char (point-max))
108 (delete-region (point) (point-max)))
109 (setq count (1+ count))
113 (message "nnmh: Receiving headers... %d%%"
114 (/ (* count 100) number))))
116 (and large (message "nnmh: Receiving headers...done"))
118 (nnheader-fold-continuation-lines)
121 (defun nnmh-open-server (server &optional defs)
122 (nnheader-init-server-buffer)
123 (if (equal server nnmh-current-server)
125 (if nnmh-current-server
126 (setq nnmh-server-alist
127 (cons (list nnmh-current-server
128 (nnheader-save-variables nnmh-server-variables))
130 (let ((state (assoc server nnmh-server-alist)))
133 (nnheader-restore-variables (nth 1 state))
134 (setq nnmh-server-alist (delq state nnmh-server-alist)))
135 (nnheader-set-init-variables nnmh-server-variables defs)))
136 (setq nnmh-current-server server)))
138 (defun nnmh-close-server (&optional server)
139 (setq nnmh-current-server nil)
142 (defun nnmh-server-opened (&optional server)
143 (and (equal server nnmh-current-server)
145 (buffer-name nntp-server-buffer)))
147 (defun nnmh-status-message (&optional server)
150 (defun nnmh-request-article (id &optional newsgroup server buffer)
151 (nnmh-possibly-change-directory newsgroup)
152 (let ((file (if (stringp id)
154 (concat nnmh-current-directory (int-to-string id))))
155 (nntp-server-buffer (or buffer nntp-server-buffer)))
158 (not (file-directory-p file))
159 (save-excursion (nnmail-find-file file))
160 (string-to-int (file-name-nondirectory file)))))
162 (defun nnmh-request-group (group &optional server dont-check)
163 (let ((pathname (nnmail-group-pathname group nnmh-directory))
166 ((not (file-directory-p pathname))
168 'nnmh "Can't select group (no such directory): %s" group))
170 (setq nnmh-current-directory pathname)
171 (and nnmh-get-new-mail
173 (nnmh-update-gnus-unreads group))
176 (nnheader-report 'nnmh "Selected group %s" group)
181 (mapcar (lambda (name) (string-to-int name))
182 (directory-files pathname nil "^[0-9]+$" t))
186 (nnheader-report 'nnmh "Selected group %s" group)
188 "211 %d %d %d %s\n" (length dir) (car dir)
189 (progn (while (cdr dir) (setq dir (cdr dir))) (car dir))
192 (nnheader-report 'nnmh "Empty group %s" group)
193 (nnheader-insert (format "211 0 1 0 %s\n" group))))))))))
195 (defun nnmh-request-scan (&optional group server)
196 (nnmail-get-new-mail 'nnmh nil nnmh-directory group))
198 (defun nnmh-request-list (&optional server dir)
201 (set-buffer nntp-server-buffer)
203 (setq dir (file-truename (file-name-as-directory nnmh-directory)))))
204 (setq dir (expand-file-name dir))
205 ;; Recurse down all directories.
206 (let ((dirs (and (file-readable-p dir)
207 (> (nth 1 (file-attributes (file-chase-links dir))) 2)
208 (directory-files dir t nil t))))
210 (if (and (not (string-match "/\\.\\.?$" (car dirs)))
211 (file-directory-p (car dirs))
212 (file-readable-p (car dirs)))
213 (nnmh-request-list nil (car dirs)))
214 (setq dirs (cdr dirs))))
215 ;; For each directory, generate an active file line.
216 (if (not (string= (expand-file-name nnmh-directory) dir))
218 (lambda (name) (string-to-int name))
219 (directory-files dir nil "^[0-9]+$" t))))
223 (set-buffer nntp-server-buffer)
224 (goto-char (point-max))
230 (file-truename (file-name-as-directory
231 (expand-file-name nnmh-directory))) dir)
232 (nnheader-replace-chars-in-string
233 (substring dir (match-end 0)) ?/ ?.))
234 (apply (function max) files)
235 (apply (function min) files)))))))
236 (setq nnmh-group-alist (nnmail-get-active))
239 (defun nnmh-request-newgroups (date &optional server)
240 (nnmh-request-list server))
242 (defun nnmh-request-post (&optional server)
243 (mail-send-and-exit nil))
245 (defun nnmh-request-expire-articles (articles newsgroup &optional server force)
246 (nnmh-possibly-change-directory newsgroup)
247 (let* ((active-articles
251 (string-to-int name)))
252 (directory-files nnmh-current-directory nil "^[0-9]+$" t)))
253 (max-article (and active-articles (apply 'max active-articles)))
255 article rest mod-time)
256 (nnmail-activate 'nnmh)
258 (while (and articles is-old)
259 (setq article (concat nnmh-current-directory
260 (int-to-string (car articles))))
261 (if (setq mod-time (nth 5 (file-attributes article)))
262 (if (and (nnmh-deletable-article-p newsgroup (car articles))
264 (nnmail-expired-article-p newsgroup mod-time force)))
266 (nnheader-message 5 "Deleting article %s in %s..."
269 (funcall nnmail-delete-file-function article)
271 (setq rest (cons (car articles) rest)))))
272 (setq rest (cons (car articles) rest))))
273 (setq articles (cdr articles)))
275 (nconc rest articles)))
277 (defun nnmh-close-group (group &optional server)
280 (defun 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)
289 (insert-buffer-substring nntp-server-buffer)
290 (setq result (eval accept-form))
291 (kill-buffer (current-buffer))
294 (funcall nnmail-delete-file-function
295 (concat nnmh-current-directory (int-to-string article)))
299 (defun nnmh-request-accept-article (group &optional last noinsert)
302 (nnmail-activate 'nnmh)
303 ;; We trick the choosing function into believing that only one
304 ;; group is available.
305 (let ((nnmail-split-methods (list (list group ""))))
306 (car (nnmh-save-mail noinsert))))
308 (nnmail-activate 'nnmh)
309 (car (nnmh-save-mail noinsert)))))
311 (defun nnmh-request-replace-article (article group buffer)
312 (nnmh-possibly-change-directory group)
315 (nnmh-possibly-create-directory group)
318 (write-region (point-min) (point-max)
319 (concat nnmh-current-directory (int-to-string article))
320 nil (if (nnheader-be-verbose 5) nil 'nomesg))
324 (defun nnmh-request-create-group (group &optional server)
325 (nnmail-activate 'nnmh)
326 (or (assoc group nnmh-group-alist)
328 (setq nnmh-group-alist (cons (list group (setq active (cons 1 0)))
330 (nnmh-possibly-create-directory group)
331 (nnmh-possibly-change-directory group)
332 (let ((articles (mapcar
334 (string-to-int file))
336 nnmh-current-directory nil "^[0-9]+$"))))
339 (setcar active (apply 'min articles))
340 (setcdr active (apply 'max articles)))))))
343 (defun nnmh-request-delete-group (group &optional force server)
344 (nnmh-possibly-change-directory group)
345 ;; Delete all articles in GROUP.
347 () ; Don't delete the articles.
348 (let ((articles (directory-files nnmh-current-directory t "^[0-9]+$")))
350 (and (file-writable-p (car articles))
352 (nnheader-message 5 "Deleting article %s in %s..."
353 (car articles) group)
354 (funcall nnmail-delete-file-function (car articles))))
355 (setq articles (cdr articles))))
356 ;; Try to delete the directory itself.
358 (delete-directory nnmh-current-directory)
360 ;; Remove the group from all structures.
361 (setq nnmh-group-alist
362 (delq (assoc group nnmh-group-alist) nnmh-group-alist)
363 nnmh-current-directory nil)
366 (defun nnmh-request-rename-group (group new-name &optional server)
367 (nnmh-possibly-change-directory group)
369 (and (file-writable-p nnmh-current-directory)
373 (directory-file-name nnmh-current-directory)
375 (nnmail-group-pathname new-name nnmh-directory)))
378 ;; That went ok, so we change the internal structures.
379 (let ((entry (assoc group nnmh-group-alist)))
380 (and entry (setcar entry new-name))
381 (setq nnmh-current-directory nil)
385 ;;; Internal functions.
387 (defun nnmh-possibly-change-directory (newsgroup)
389 (let ((pathname (nnmail-group-pathname newsgroup nnmh-directory)))
390 (if (file-directory-p pathname)
391 (setq nnmh-current-directory pathname)
392 (error "No such newsgroup: %s" newsgroup)))))
394 (defun nnmh-possibly-create-directory (group)
396 (setq dir (nnmail-group-pathname group nnmh-directory))
397 (while (not (file-directory-p dir))
398 (setq dirs (cons dir dirs))
399 (setq dir (file-name-directory (directory-file-name dir))))
401 (if (make-directory (directory-file-name (car dirs)))
402 (error "Could not create directory %s" (car dirs)))
403 (nnheader-message 5 "Creating mail directory %s" (car dirs))
404 (setq dirs (cdr dirs)))))
406 (defun nnmh-save-mail (&optional noinsert)
407 "Called narrowed to an article."
408 (let ((group-art (nreverse (nnmail-article-group 'nnmh-active-number))))
410 (nnmail-insert-lines)
411 (nnmail-insert-xref group-art))
412 (run-hooks 'nnmh-prepare-save-mail-hook)
413 (goto-char (point-min))
414 (while (looking-at "From ")
415 (replace-match "X-From-Line: ")
417 ;; We save the article in all the newsgroups it belongs in.
421 (nnmh-possibly-create-directory (car (car ga)))
422 (let ((file (concat (nnmail-group-pathname
423 (car (car ga)) nnmh-directory)
424 (int-to-string (cdr (car ga))))))
426 ;; It was already saved, so we just make a hard link.
427 (funcall nnmail-crosspost-link-function first file t)
429 (write-region (point-min) (point-max) file nil nil)
434 (defun nnmh-active-number (group)
435 "Compute the next article number in GROUP."
436 (let ((active (car (cdr (assoc group nnmh-group-alist)))))
437 ;; The group wasn't known to nnmh, so we just create an active
441 (setq active (cons 1 0))
442 (setq nnmh-group-alist (cons (list group active) nnmh-group-alist))))
443 (setcdr active (1+ (cdr active)))
444 (while (file-exists-p
445 (concat (nnmail-group-pathname group nnmh-directory)
446 (int-to-string (cdr active))))
447 (setcdr active (1+ (cdr active))))
450 (defun nnmh-update-gnus-unreads (group)
451 ;; Go through the .nnmh-articles file and compare with the actual
452 ;; articles in this folder. The articles that are "new" will be
453 ;; marked as unread by Gnus.
454 (let* ((dir nnmh-current-directory)
455 (files (sort (mapcar (function (lambda (name) (string-to-int name)))
456 (directory-files nnmh-current-directory
457 nil "^[0-9]+$" t)) '<))
458 (nnmh-file (concat dir ".nnmh-articles"))
460 ;; Load the .nnmh-articles file.
461 (if (file-exists-p nnmh-file)
463 (let (nnmh-newsgroup-articles)
464 (condition-case nil (load nnmh-file nil t t) (error nil))
465 nnmh-newsgroup-articles)))
466 ;; Add all new articles to the `new' list.
469 (if (not (assq (car art) articles)) (setq new (cons (car art) new)))
470 (setq art (cdr art))))
471 ;; Remove all deleted articles.
472 (let ((art articles))
474 (if (not (memq (car (car art)) files))
475 (setq articles (delq (car art) articles)))
476 (setq art (cdr art))))
477 ;; Check whether the highest-numbered articles really are the ones
478 ;; that Gnus thinks they are by looking at the time-stamps.
479 (let ((art articles))
482 (nth 5 (file-attributes
483 (concat dir (int-to-string (car (car art))))))
485 (setq articles (delq (car art) articles))
486 (setq new (cons (car (car art)) new))
487 (setq art (cdr art))))
488 ;; Go through all the new articles and add them, and their
489 ;; time-stamps to the list.
495 (nth 5 (file-attributes
496 (concat dir (int-to-string (car n))))))
499 ;; Make Gnus mark all new articles as unread.
500 (or (zerop (length new))
501 (gnus-make-articles-unread
502 (gnus-group-prefixed-name group (list 'nnmh ""))
503 (setq new (sort new '<))))
504 ;; Sort the article list with highest numbers first.
505 (setq articles (sort articles (lambda (art1 art2)
506 (> (car art1) (car art2)))))
507 ;; Finally write this list back to the .nnmh-articles file.
509 (set-buffer (get-buffer-create "*nnmh out*"))
510 (insert ";; Gnus article active file for " group "\n\n")
511 (insert "(setq nnmh-newsgroup-articles '")
512 (insert (prin1-to-string articles) ")\n")
513 (write-region (point-min) (point-max) nnmh-file nil 'nomesg)
514 (kill-buffer (current-buffer)))))
516 (defun nnmh-deletable-article-p (group article)
517 "Say whether ARTICLE in GROUP can be deleted."
518 (let ((path (concat nnmh-current-directory (int-to-string article))))
519 (and (file-writable-p path)
520 (or (not nnmail-keep-last-article)
521 (not (eq (cdr (nth 1 (assoc group nnmh-group-alist)))
526 ;;; nnmh.el ends here