1 ;;; nnmh.el --- mhspool access for Gnus
2 ;; Copyright (C) 1995 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
37 (defvar nnmh-directory "~/Mail/"
38 "*Mail spool directory.")
40 (defvar nnmh-get-new-mail t
41 "*If non-nil, nnmh will check the incoming mail file and split the mail.")
43 (defvar nnmh-prepare-save-mail-hook nil
44 "*Hook run narrowed to an article before saving.")
46 (defvar nnmh-be-safe nil
47 "*If non-nil, nnmh will check all articles to make sure whether they are new or not.")
51 (defconst nnmh-version "nnmh 0.1"
54 (defvar nnmh-current-directory nil
55 "Current news group directory.")
57 (defvar nnmh-status-string "")
58 (defvar nnmh-group-alist nil)
62 (defvar nnmh-current-server nil)
63 (defvar nnmh-server-alist nil)
64 (defvar nnmh-server-variables
66 (list 'nnmh-directory nnmh-directory)
67 (list 'nnmh-get-new-mail nnmh-get-new-mail)
68 '(nnmh-current-directory nil)
69 '(nnmh-status-string "")
74 ;;; Interface functions.
76 (defun nnmh-retrieve-headers (sequence &optional newsgroup server)
78 (set-buffer nntp-server-buffer)
81 (number (length sequence))
82 (large (and (numberp nnmail-large-newsgroup)
83 (> number nnmail-large-newsgroup)))
86 (nnmh-possibly-change-directory newsgroup)
87 (if (stringp (car sequence))
90 (setq article (car sequence))
92 (concat nnmh-current-directory (int-to-string article)))
93 (if (and (file-exists-p file)
94 (not (file-directory-p file)))
96 (insert (format "221 %d Article retrieved.\n" article))
98 (nnheader-insert-head file)
100 (if (search-forward "\n\n" nil t)
102 (goto-char (point-max))
105 (delete-region (point) (point-max))))
106 (setq sequence (cdr sequence))
107 (setq count (1+ count))
111 (message "nnmh: Receiving headers... %d%%"
112 (/ (* count 100) number))))
114 (and large (message "nnmh: Receiving headers...done"))
116 ;; Fold continuation lines.
117 (goto-char (point-min))
118 (while (re-search-forward "\\(\r?\n[ \t]+\\)+" nil t)
119 (replace-match " " t t))
122 (defun nnmh-open-server (server &optional defs)
123 (nnheader-init-server-buffer)
124 (if (equal server nnmh-current-server)
126 (if nnmh-current-server
127 (setq nnmh-server-alist
128 (cons (list nnmh-current-server
129 (nnheader-save-variables nnmh-server-variables))
131 (let ((state (assoc server nnmh-server-alist)))
134 (nnheader-restore-variables (nth 1 state))
135 (setq nnmh-server-alist (delq state nnmh-server-alist)))
136 (nnheader-set-init-variables nnmh-server-variables defs)))
137 (setq nnmh-current-server server)))
139 (defun nnmh-close-server (&optional server)
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)))))
161 (defun nnmh-request-group (group &optional server dont-check)
162 (and nnmh-get-new-mail (or dont-check (nnmh-get-new-mail group)))
163 (let ((pathname (nnmh-article-pathname group nnmh-directory))
165 (if (file-directory-p pathname)
167 (setq nnmh-current-directory pathname)
168 (and nnmh-get-new-mail
170 (nnmh-update-gnus-unreads group))
178 (string-to-int name)))
179 (directory-files pathname nil "^[0-9]+$" t))
182 (set-buffer nntp-server-buffer)
185 (insert (format "211 %d %d %d %s\n" (length dir)
187 (progn (while (cdr dir)
188 (setq dir (cdr dir)))
191 (insert (format "211 0 1 0 %s\n" group))))))
193 (setq nnmh-status-string "No such group")
196 (defun nnmh-request-list (&optional server dir)
199 (set-buffer nntp-server-buffer)
201 (setq dir (file-name-as-directory nnmh-directory))))
202 (setq dir (expand-file-name dir))
203 ;; Recurse down all directories.
204 (let ((dirs (and (file-readable-p dir)
205 (> (nth 1 (file-attributes (file-chase-links dir))) 2)
206 (directory-files dir t nil t))))
208 (if (and (not (string-match "/\\.\\.?$" (car dirs)))
209 (file-directory-p (car dirs))
210 (file-readable-p (car dirs)))
211 (nnmh-request-list nil (car dirs)))
212 (setq dirs (cdr dirs))))
213 ;; For each directory, generate an active file line.
214 (if (not (string= (expand-file-name nnmh-directory) dir))
216 (lambda (name) (string-to-int name))
217 (directory-files dir nil "^[0-9]+$" t))))
221 (set-buffer nntp-server-buffer)
222 (goto-char (point-max))
227 (string-match (file-name-as-directory
228 (expand-file-name nnmh-directory)) dir)
229 (nnmail-replace-chars-in-string
230 (substring dir (match-end 0)) ?/ ?.))
231 (apply (function max) files)
232 (apply (function min) files)))))))
233 (setq nnmh-group-alist (nnmail-get-active))
234 (and server nnmh-get-new-mail (nnmh-get-new-mail))
237 (defun nnmh-request-newgroups (date &optional server)
238 (nnmh-request-list server))
240 (defun nnmh-request-post (&optional server)
241 (mail-send-and-exit nil))
243 (defalias 'nnmh-request-post-buffer 'nnmail-request-post-buffer)
245 (defun nnmh-request-expire-articles (articles newsgroup &optional server force)
246 (nnmh-possibly-change-directory newsgroup)
247 (let* ((days (or (and nnmail-expiry-wait-function
248 (funcall nnmail-expiry-wait-function newsgroup))
254 (string-to-int name)))
255 (directory-files nnmh-current-directory nil "^[0-9]+$" t)))
256 (max-article (and active-articles (apply 'max active-articles)))
258 article rest mod-time)
259 (nnmail-activate 'nnmh)
261 (while (and articles is-old)
262 (setq article (concat nnmh-current-directory
263 (int-to-string (car articles))))
264 (if (setq mod-time (nth 5 (file-attributes article)))
265 (if (and (or (not nnmail-keep-last-article)
267 (not (= (car articles) max-article)))
268 (not (equal mod-time '(0 0)))
271 (> (nnmail-days-between
272 (current-time-string)
273 (current-time-string mod-time))
276 (and gnus-verbose-backends
277 (message "Deleting article %s..." article))
279 (delete-file article)
281 (setq rest (cons (car articles) rest)))))
282 (setq rest (cons (car articles) rest))))
283 (setq articles (cdr articles)))
285 (nconc rest articles)))
287 (defun nnmh-close-group (group &optional server)
290 (defun nnmh-request-move-article
291 (article group server accept-form &optional last)
292 (let ((buf (get-buffer-create " *nnmh move*"))
295 (nnmh-request-article article group server)
298 (insert-buffer-substring nntp-server-buffer)
299 (setq result (eval accept-form))
300 (kill-buffer (current-buffer))
303 (delete-file (concat nnmh-current-directory
304 (int-to-string article)))
308 (defun nnmh-request-accept-article (group &optional last)
311 (nnmail-activate 'nnmh)
312 ;; We trick the choosing function into believing that only one
313 ;; group is availiable.
314 (let ((nnmail-split-methods (list (list group ""))))
315 (car (nnmh-save-mail))))
317 (nnmail-activate 'nnmh)
318 (car (nnmh-save-mail)))))
320 (defun nnmh-request-replace-article (article group buffer)
321 (nnmh-possibly-change-directory group)
324 (nnmh-possibly-create-directory group)
327 (write-region (point-min) (point-max)
328 (concat nnmh-current-directory (int-to-string article))
329 nil (if gnus-verbose-backends nil 'nomesg))
334 ;;; Internal functions.
336 (defun nnmh-possibly-change-directory (newsgroup)
338 (let ((pathname (nnmh-article-pathname newsgroup nnmh-directory)))
339 (if (file-directory-p pathname)
340 (setq nnmh-current-directory pathname)
341 (error "No such newsgroup: %s" newsgroup)))))
343 (defun nnmh-possibly-create-directory (group)
345 (setq dir (nnmh-article-pathname group nnmh-directory))
346 (while (not (file-directory-p dir))
347 (setq dirs (cons dir dirs))
348 (setq dir (file-name-directory (directory-file-name dir))))
350 (if (make-directory (directory-file-name (car dirs)))
351 (error "Could not create directory %s" (car dirs)))
352 (and gnus-verbose-backends
353 (message "Creating mail directory %s" (car dirs)))
354 (setq dirs (cdr dirs)))))
356 (defun nnmh-save-mail ()
357 "Called narrowed to an article."
358 (let ((group-art (nreverse (nnmail-article-group 'nnmh-active-number))))
359 (nnmail-insert-lines)
360 (nnmail-insert-xref group-art)
361 (run-hooks 'nnmh-prepare-save-mail-hook)
362 (goto-char (point-min))
363 (while (looking-at "From ")
364 (replace-match "X-From-Line: ")
366 ;; We save the article in all the newsgroups it belongs in.
370 (nnmh-possibly-create-directory (car (car ga)))
371 (let ((file (concat (nnmh-article-pathname
372 (car (car ga)) nnmh-directory)
373 (int-to-string (cdr (car ga))))))
375 ;; It was already saved, so we just make a hard link.
376 (add-name-to-file first file t)
378 (write-region (point-min) (point-max) file nil nil)
383 (defun nnmh-active-number (group)
384 "Compute the next article number in GROUP."
385 (let ((active (car (cdr (assoc group nnmh-group-alist)))))
386 ;; The group wasn't known to nnmh, so we just create an active
390 (setq active (cons 1 0))
391 (setq nnmh-group-alist (cons (list group active) nnmh-group-alist))))
392 (setcdr active (1+ (cdr active)))
393 (while (file-exists-p
394 (concat (nnmh-article-pathname group nnmh-directory)
395 (int-to-string (cdr active))))
396 (setcdr active (1+ (cdr active))))
399 (defun nnmh-article-pathname (group mail-dir)
400 "Make pathname for GROUP."
401 (let ((mail-dir (file-name-as-directory (expand-file-name mail-dir))))
402 (if (file-directory-p (concat mail-dir group))
403 (concat mail-dir group "/")
404 (concat mail-dir (nnmail-replace-chars-in-string group ?. ?/) "/"))))
406 (defun nnmh-get-new-mail (&optional group)
407 "Read new incoming mail."
408 (let* ((spools (nnmail-get-spool-files group))
411 (if (or (not nnmh-get-new-mail) (not nnmail-spool-file))
413 ;; We first activate all the groups.
416 ;; The we go through all the existing spool files and split the
420 (file-exists-p (car spools))
421 (> (nth 7 (file-attributes (car spools))) 0)
423 (and gnus-verbose-backends
424 (message "nnmh: Reading incoming mail..."))
427 (car spools) (concat (file-name-as-directory nnmh-directory)
429 (setq incomings (cons incoming incomings))
430 (setq group (nnmail-get-split-group (car spools) group-in))
431 (nnmail-split-incoming incoming 'nnmh-save-mail nil group)))
432 (setq spools (cdr spools)))
433 ;; If we did indeed read any incoming spools, we save all info.
435 (message "nnmh: Reading incoming mail...done"))
437 (setq incoming (car incomings))
438 (and nnmail-delete-incoming
439 (file-exists-p incoming)
440 (file-writable-p incoming)
441 (delete-file incoming))
442 (setq incomings (cdr incomings))))))
445 (defun nnmh-update-gnus-unreads (group)
446 ;; Go through the .nnmh-articles file and compare with the actual
447 ;; articles in this folder. The articles that are "new" will be
448 ;; marked as unread by Gnus.
449 (let* ((dir nnmh-current-directory)
450 (files (sort (mapcar (function (lambda (name) (string-to-int name)))
451 (directory-files nnmh-current-directory
452 nil "^[0-9]+$" t)) '<))
453 (nnmh-file (concat dir ".nnmh-articles"))
455 ;; Load the .nnmh-articles file.
456 (if (file-exists-p nnmh-file)
458 (let (nnmh-newsgroup-articles)
459 (condition-case nil (load nnmh-file nil t t) (error nil))
460 nnmh-newsgroup-articles)))
461 ;; Add all new articles to the `new' list.
464 (if (not (assq (car art) articles)) (setq new (cons (car art) new)))
465 (setq art (cdr art))))
466 ;; Remove all deleted articles.
467 (let ((art articles))
469 (if (not (memq (car (car art)) files))
470 (setq articles (delq (car art) articles)))
471 (setq art (cdr art))))
472 ;; Check whether the highest-numbered articles really are the ones
473 ;; that Gnus thinks they are by looking at the time-stamps.
474 (let ((art articles))
477 (nth 5 (file-attributes
478 (concat dir (int-to-string (car (car art))))))
480 (setq articles (delq (car art) articles))
481 (setq new (cons (car (car art)) new))
482 (setq art (cdr art))))
483 ;; Go through all the new articles and add them, and their
484 ;; time-stamps to the list.
490 (nth 5 (file-attributes
491 (concat dir (int-to-string (car n))))))
494 ;; Make Gnus mark all new articles as unread.
495 (or (zerop (length new))
496 (gnus-make-articles-unread
497 (gnus-group-prefixed-name group (list 'nnmh ""))
498 (setq new (sort new '<))))
499 ;; Sort the article list with highest numbers first.
500 (setq articles (sort articles (lambda (art1 art2)
501 (> (car art1) (car art2)))))
502 ;; Finally write this list back to the .nnmh-articles file.
504 (set-buffer (get-buffer-create "*nnmh out*"))
505 (insert ";; Gnus article active file for " group "\n\n")
506 (insert "(setq nnmh-newsgroup-articles '")
507 (insert (prin1-to-string articles) ")\n")
508 (write-region (point-min) (point-max) nnmh-file nil 'nomesg)
509 (kill-buffer (current-buffer)))))
513 ;;; nnmh.el ends here