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- ;;; nnfolder.el --- mail folder access for Gnus
- ;; Copyright (C) 1995,96 Free Software Foundation, Inc.
-
- ;; Author: Scott Byer <byer@mv.us.adobe.com>
- ;; Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
- ;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
- ;; Keywords: mail
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is free software; you can redistribute it and/or modify
- ;; it under the terms of the GNU General Public License as published by
- ;; the Free Software Foundation; either version 2, or (at your option)
- ;; any later version.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ;; GNU General Public License for more details.
-
- ;; You should have received a copy of the GNU General Public License
- ;; along with GNU Emacs; see the file COPYING. If not, write to the
- ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Commentary:
-
- ;; For an overview of what the interface functions do, please see the
- ;; Gnus sources.
-
- ;; Various enhancements by byer@mv.us.adobe.com (Scott Byer).
-
- ;;; Code:
-
- (require 'nnheader)
- (require 'message)
- (require 'nnmail)
- (require 'nnoo)
- (eval-when-compile (require 'cl))
-
- (nnoo-declare nnfolder)
-
- (defvoo nnfolder-directory (expand-file-name message-directory)
- "The name of the nnfolder directory.")
-
- (defvoo nnfolder-active-file
- (nnheader-concat nnfolder-directory "active")
- "The name of the active file.")
-
- ;; I renamed this variable to something more in keeping with the general GNU
- ;; style. -SLB
-
- (defvoo nnfolder-ignore-active-file nil
- "If non-nil, causes nnfolder to do some extra work in order to determine
- the true active ranges of an mbox file. Note that the active file is still
- saved, but it's values are not used. This costs some extra time when
- scanning an mbox when opening it.")
-
- (defvoo nnfolder-distrust-mbox nil
- "If non-nil, causes nnfolder to not trust the user with respect to
- inserting unaccounted for mail in the middle of an mbox file. This can greatly
- slow down scans, which now must scan the entire file for unmarked messages.
- When nil, scans occur forward from the last marked message, a huge
- time saver for large mailboxes.")
-
- (defvoo nnfolder-newsgroups-file
- (concat (file-name-as-directory nnfolder-directory) "newsgroups")
- "Mail newsgroups description file.")
-
- (defvoo nnfolder-get-new-mail t
- "If non-nil, nnfolder will check the incoming mail file and split the mail.")
-
- (defvoo nnfolder-prepare-save-mail-hook nil
- "Hook run narrowed to an article before saving.")
-
- (defvoo nnfolder-save-buffer-hook nil
- "Hook run before saving the nnfolder mbox buffer.")
-
- (defvoo nnfolder-inhibit-expiry nil
- "If non-nil, inhibit expiry.")
-
-
-
- (defconst nnfolder-version "nnfolder 1.0"
- "nnfolder version.")
-
- (defconst nnfolder-article-marker "X-Gnus-Article-Number: "
- "String used to demarcate what the article number for a message is.")
-
- (defvoo nnfolder-current-group nil)
- (defvoo nnfolder-current-buffer nil)
- (defvoo nnfolder-status-string "")
- (defvoo nnfolder-group-alist nil)
- (defvoo nnfolder-buffer-alist nil)
- (defvoo nnfolder-scantime-alist nil)
-
-
-
- ;;; Interface functions
-
- (nnoo-define-basics nnfolder)
-
- (deffoo nnfolder-retrieve-headers (articles &optional group server fetch-old)
- (save-excursion
- (set-buffer nntp-server-buffer)
- (erase-buffer)
- (let ((delim-string (concat "^" message-unix-mail-delimiter))
- article art-string start stop)
- (nnfolder-possibly-change-group group server)
- (when nnfolder-current-buffer
- (set-buffer nnfolder-current-buffer)
- (goto-char (point-min))
- (if (stringp (car articles))
- 'headers
- (while articles
- (setq article (car articles))
- (setq art-string (nnfolder-article-string article))
- (set-buffer nnfolder-current-buffer)
- (if (or (search-forward art-string nil t)
- ;; Don't search the whole file twice! Also, articles
- ;; probably have some locality by number, so searching
- ;; backwards will be faster. Especially if we're at the
- ;; beginning of the buffer :-). -SLB
- (search-backward art-string nil t))
- (progn
- (setq start (or (re-search-backward delim-string nil t)
- (point)))
- (search-forward "\n\n" nil t)
- (setq stop (1- (point)))
- (set-buffer nntp-server-buffer)
- (insert (format "221 %d Article retrieved.\n" article))
- (insert-buffer-substring nnfolder-current-buffer start stop)
- (goto-char (point-max))
- (insert ".\n")))
- (setq articles (cdr articles)))
-
- (set-buffer nntp-server-buffer)
- (nnheader-fold-continuation-lines)
- 'headers)))))
-
- (deffoo nnfolder-open-server (server &optional defs)
- (nnoo-change-server 'nnfolder server defs)
- (when (not (file-exists-p nnfolder-directory))
- (condition-case ()
- (make-directory nnfolder-directory t)
- (error t)))
- (cond
- ((not (file-exists-p nnfolder-directory))
- (nnfolder-close-server)
- (nnheader-report 'nnfolder "Couldn't create directory: %s"
- nnfolder-directory))
- ((not (file-directory-p (file-truename nnfolder-directory)))
- (nnfolder-close-server)
- (nnheader-report 'nnfolder "Not a directory: %s" nnfolder-directory))
- (t
- (nnheader-report 'nnfolder "Opened server %s using directory %s"
- server nnfolder-directory)
- t)))
-
- (deffoo nnfolder-request-close ()
- (let ((alist nnfolder-buffer-alist))
- (while alist
- (nnfolder-close-group (caar alist) nil t)
- (setq alist (cdr alist))))
- (nnoo-close-server 'nnfolder)
- (setq nnfolder-buffer-alist nil
- nnfolder-group-alist nil))
-
- (deffoo nnfolder-request-article (article &optional group server buffer)
- (nnfolder-possibly-change-group group server)
- (save-excursion
- (set-buffer nnfolder-current-buffer)
- (goto-char (point-min))
- (if (search-forward (nnfolder-article-string article) nil t)
- (let (start stop)
- (re-search-backward (concat "^" message-unix-mail-delimiter) nil t)
- (setq start (point))
- (forward-line 1)
- (or (and (re-search-forward
- (concat "^" message-unix-mail-delimiter) nil t)
- (forward-line -1))
- (goto-char (point-max)))
- (setq stop (point))
- (let ((nntp-server-buffer (or buffer nntp-server-buffer)))
- (set-buffer nntp-server-buffer)
- (erase-buffer)
- (insert-buffer-substring nnfolder-current-buffer start stop)
- (goto-char (point-min))
- (while (looking-at "From ")
- (delete-char 5)
- (insert "X-From-Line: ")
- (forward-line 1))
- (if (numberp article)
- (cons nnfolder-current-group article)
- (goto-char (point-min))
- (search-forward (concat "\n" nnfolder-article-marker))
- (cons nnfolder-current-group
- (string-to-int
- (buffer-substring
- (point) (progn (end-of-line) (point)))))))))))
-
- (deffoo nnfolder-request-group (group &optional server dont-check)
- (save-excursion
- (nnmail-activate 'nnfolder)
- (if (not (assoc group nnfolder-group-alist))
- (nnheader-report 'nnfolder "No such group: %s" group)
- (nnfolder-possibly-change-group group server)
- (if dont-check
- (progn
- (nnheader-report 'nnfolder "Selected group %s" group)
- t)
- (let* ((active (assoc group nnfolder-group-alist))
- (group (car active))
- (range (cadr active)))
- (cond
- ((null active)
- (nnheader-report 'nnfolder "No such group: %s" group))
- ((null nnfolder-current-group)
- (nnheader-report 'nnfolder "Empty group: %s" group))
- (t
- (nnheader-report 'nnfolder "Selected group %s" group)
- (nnheader-insert "211 %d %d %d %s\n"
- (1+ (- (cdr range) (car range)))
- (car range) (cdr range) group))))))))
-
- (deffoo nnfolder-request-scan (&optional group server)
- (nnfolder-possibly-change-group group server t)
- (nnmail-get-new-mail
- 'nnfolder
- (lambda ()
- (let ((bufs nnfolder-buffer-alist))
- (save-excursion
- (while bufs
- (if (not (buffer-name (nth 1 (car bufs))))
- (setq nnfolder-buffer-alist
- (delq (car bufs) nnfolder-buffer-alist))
- (set-buffer (nth 1 (car bufs)))
- (nnfolder-save-buffer)
- (kill-buffer (current-buffer)))
- (setq bufs (cdr bufs))))))
- nnfolder-directory
- group))
-
- ;; Don't close the buffer if we're not shutting down the server. This way,
- ;; we can keep the buffer in the group buffer cache, and not have to grovel
- ;; over the buffer again unless we add new mail to it or modify it in some
- ;; way.
-
- (deffoo nnfolder-close-group (group &optional server force)
- ;; Make sure we _had_ the group open.
- (when (or (assoc group nnfolder-buffer-alist)
- (equal group nnfolder-current-group))
- (let ((inf (assoc group nnfolder-buffer-alist)))
- (when inf
- (when nnfolder-current-group
- (push (list nnfolder-current-group nnfolder-current-buffer)
- nnfolder-buffer-alist))
- (setq nnfolder-buffer-alist
- (delq inf nnfolder-buffer-alist))
- (setq nnfolder-current-buffer (cadr inf)
- nnfolder-current-group (car inf))))
- (when (and nnfolder-current-buffer
- (buffer-name nnfolder-current-buffer))
- (save-excursion
- (set-buffer nnfolder-current-buffer)
- ;; If the buffer was modified, write the file out now.
- (nnfolder-save-buffer)
- ;; If we're shutting the server down, we need to kill the
- ;; buffer and remove it from the open buffer list. Or, of
- ;; course, if we're trying to minimize our space impact.
- (kill-buffer (current-buffer))
- (setq nnfolder-buffer-alist (delq (assoc group nnfolder-buffer-alist)
- nnfolder-buffer-alist)))))
- (setq nnfolder-current-group nil
- nnfolder-current-buffer nil)
- t)
-
- (deffoo nnfolder-request-create-group (group &optional server)
- (nnfolder-possibly-change-group nil server)
- (nnmail-activate 'nnfolder)
- (when group
- (unless (assoc group nnfolder-group-alist)
- (push (list group (cons 1 0)) nnfolder-group-alist)
- (nnmail-save-active nnfolder-group-alist nnfolder-active-file)))
- t)
-
- (deffoo nnfolder-request-list (&optional server)
- (nnfolder-possibly-change-group nil server)
- (save-excursion
- (nnmail-find-file nnfolder-active-file)
- (setq nnfolder-group-alist (nnmail-get-active))))
-
- (deffoo nnfolder-request-newgroups (date &optional server)
- (nnfolder-possibly-change-group nil server)
- (nnfolder-request-list server))
-
- (deffoo nnfolder-request-list-newsgroups (&optional server)
- (nnfolder-possibly-change-group nil server)
- (save-excursion
- (nnmail-find-file nnfolder-newsgroups-file)))
-
- (deffoo nnfolder-request-expire-articles
- (articles newsgroup &optional server force)
- (nnfolder-possibly-change-group newsgroup server)
- (let* ((is-old t)
- rest)
- (nnmail-activate 'nnfolder)
-
- (save-excursion
- (set-buffer nnfolder-current-buffer)
- (while (and articles is-old)
- (goto-char (point-min))
- (if (search-forward (nnfolder-article-string (car articles)) nil t)
- (if (setq is-old
- (nnmail-expired-article-p
- newsgroup
- (buffer-substring
- (point) (progn (end-of-line) (point)))
- force nnfolder-inhibit-expiry))
- (progn
- (nnheader-message 5 "Deleting article %d..."
- (car articles) newsgroup)
- (nnfolder-delete-mail))
- (setq rest (cons (car articles) rest))))
- (setq articles (cdr articles)))
- (nnfolder-save-buffer)
- ;; Find the lowest active article in this group.
- (let* ((active (cadr (assoc newsgroup nnfolder-group-alist)))
- (marker (concat "\n" nnfolder-article-marker))
- (number "[0-9]+")
- (activemin (cdr active)))
- (goto-char (point-min))
- (while (and (search-forward marker nil t)
- (re-search-forward number nil t))
- (setq activemin (min activemin
- (string-to-number (buffer-substring
- (match-beginning 0)
- (match-end 0))))))
- (setcar active activemin))
- (nnmail-save-active nnfolder-group-alist nnfolder-active-file)
- (nconc rest articles))))
-
- (deffoo nnfolder-request-move-article
- (article group server accept-form &optional last)
- (nnfolder-possibly-change-group group server)
- (let ((buf (get-buffer-create " *nnfolder move*"))
- result)
- (and
- (nnfolder-request-article article group server)
- (save-excursion
- (set-buffer buf)
- (buffer-disable-undo (current-buffer))
- (erase-buffer)
- (insert-buffer-substring nntp-server-buffer)
- (goto-char (point-min))
- (while (re-search-forward
- (concat "^" nnfolder-article-marker)
- (save-excursion (search-forward "\n\n" nil t) (point)) t)
- (delete-region (progn (beginning-of-line) (point))
- (progn (forward-line 1) (point))))
- (setq result (eval accept-form))
- (kill-buffer buf)
- result)
- (save-excursion
- (nnfolder-possibly-change-group group server)
- (set-buffer nnfolder-current-buffer)
- (goto-char (point-min))
- (if (search-forward (nnfolder-article-string article) nil t)
- (nnfolder-delete-mail))
- (and last (nnfolder-save-buffer))))
- result))
-
- (deffoo nnfolder-request-accept-article (group &optional server last)
- (nnfolder-possibly-change-group group server)
- (nnmail-check-syntax)
- (and (stringp group) (nnfolder-possibly-change-group group))
- (let ((buf (current-buffer))
- result)
- (goto-char (point-min))
- (when (looking-at "X-From-Line: ")
- (replace-match "From "))
- (and
- (nnfolder-request-list)
- (save-excursion
- (set-buffer buf)
- (goto-char (point-min))
- (search-forward "\n\n" nil t)
- (forward-line -1)
- (while (re-search-backward (concat "^" nnfolder-article-marker) nil t)
- (delete-region (point) (progn (forward-line 1) (point))))
- (setq result (car (nnfolder-save-mail (and (stringp group) group)))))
- (save-excursion
- (set-buffer nnfolder-current-buffer)
- (and last (nnfolder-save-buffer))))
- (nnmail-save-active nnfolder-group-alist nnfolder-active-file)
- (unless result
- (nnheader-report 'nnfolder "Couldn't store article"))
- result))
-
- (deffoo nnfolder-request-replace-article (article group buffer)
- (nnfolder-possibly-change-group group)
- (save-excursion
- (set-buffer nnfolder-current-buffer)
- (goto-char (point-min))
- (if (not (search-forward (nnfolder-article-string article) nil t))
- nil
- (nnfolder-delete-mail t t)
- (insert-buffer-substring buffer)
- (nnfolder-save-buffer)
- t)))
-
- (deffoo nnfolder-request-delete-group (group &optional force server)
- (nnfolder-close-group group server t)
- ;; Delete all articles in GROUP.
- (if (not force)
- () ; Don't delete the articles.
- ;; Delete the file that holds the group.
- (condition-case nil
- (delete-file (nnfolder-group-pathname group))
- (error nil)))
- ;; Remove the group from all structures.
- (setq nnfolder-group-alist
- (delq (assoc group nnfolder-group-alist) nnfolder-group-alist)
- nnfolder-current-group nil
- nnfolder-current-buffer nil)
- ;; Save the active file.
- (nnmail-save-active nnfolder-group-alist nnfolder-active-file)
- t)
-
- (deffoo nnfolder-request-rename-group (group new-name &optional server)
- (nnfolder-possibly-change-group group server)
- (save-excursion
- (set-buffer nnfolder-current-buffer)
- (and (file-writable-p buffer-file-name)
- (condition-case ()
- (progn
- (rename-file
- buffer-file-name
- (nnfolder-group-pathname new-name))
- t)
- (error nil))
- ;; That went ok, so we change the internal structures.
- (let ((entry (assoc group nnfolder-group-alist)))
- (and entry (setcar entry new-name))
- (setq nnfolder-current-buffer nil
- nnfolder-current-group nil)
- ;; Save the new group alist.
- (nnmail-save-active nnfolder-group-alist nnfolder-active-file)
- ;; We kill the buffer instead of renaming it and stuff.
- (kill-buffer (current-buffer))
- t))))
-
-
- ;;; Internal functions.
-
- (defun nnfolder-article-string (article)
- (if (numberp article)
- (concat "\n" nnfolder-article-marker (int-to-string article) " ")
- (concat "\nMessage-ID: " article)))
-
- (defun nnfolder-delete-mail (&optional force leave-delim)
- "Delete the message that point is in."
- (save-excursion
- (delete-region
- (save-excursion
- (re-search-backward (concat "^" message-unix-mail-delimiter) nil t)
- (if leave-delim (progn (forward-line 1) (point))
- (match-beginning 0)))
- (progn
- (forward-line 1)
- (if (re-search-forward (concat "^" message-unix-mail-delimiter) nil t)
- (if (and (not (bobp)) leave-delim)
- (progn (forward-line -2) (point))
- (match-beginning 0))
- (point-max))))))
-
- ;; When scanning, we're not looking t immediately switch into the group - if
- ;; we know our information is up to date, don't even bother reading the file.
- (defun nnfolder-possibly-change-group (group &optional server scanning)
- (when (and server
- (not (nnfolder-server-opened server)))
- (nnfolder-open-server server))
- (when (and group (or nnfolder-current-buffer
- (not (equal group nnfolder-current-group))))
- (unless (file-exists-p nnfolder-directory)
- (make-directory (directory-file-name nnfolder-directory) t))
- (nnfolder-possibly-activate-groups nil)
- (or (assoc group nnfolder-group-alist)
- (not (file-exists-p
- (nnfolder-group-pathname group)))
- (progn
- (setq nnfolder-group-alist
- (cons (list group (cons 1 0)) nnfolder-group-alist))
- (nnmail-save-active nnfolder-group-alist nnfolder-active-file)))
- (let (inf file)
- (if (and (equal group nnfolder-current-group)
- nnfolder-current-buffer
- (buffer-name nnfolder-current-buffer))
- ()
- (setq nnfolder-current-group group)
-
- ;; If we have to change groups, see if we don't already have the mbox
- ;; in memory. If we do, verify the modtime and destroy the mbox if
- ;; needed so we can rescan it.
- (if (setq inf (assoc group nnfolder-buffer-alist))
- (setq nnfolder-current-buffer (nth 1 inf)))
-
- ;; If the buffer is not live, make sure it isn't in the alist. If it
- ;; is live, verify that nobody else has touched the file since last
- ;; time.
- (if (or (not (and nnfolder-current-buffer
- (buffer-name nnfolder-current-buffer)))
- (not (and (bufferp nnfolder-current-buffer)
- (verify-visited-file-modtime
- nnfolder-current-buffer))))
- (progn
- (if (and nnfolder-current-buffer
- (buffer-name nnfolder-current-buffer)
- (bufferp nnfolder-current-buffer))
- (kill-buffer nnfolder-current-buffer))
- (setq nnfolder-buffer-alist (delq inf nnfolder-buffer-alist))
- (setq inf nil)))
-
- (if inf
- ()
- (save-excursion
- (setq file (nnfolder-group-pathname group))
- (if (file-directory-p (file-truename file))
- ()
- (unless (file-exists-p file)
- (unless (file-exists-p (file-name-directory file))
- (make-directory (file-name-directory file) t))
- (write-region 1 1 file t 'nomesg))
- (setq nnfolder-current-buffer
- (nnfolder-read-folder file scanning))
- (if nnfolder-current-buffer
- (progn
- (set-buffer nnfolder-current-buffer)
- (setq nnfolder-buffer-alist
- (cons (list group nnfolder-current-buffer)
- nnfolder-buffer-alist)))))))))
- (setq nnfolder-current-group group)))
-
- (defun nnfolder-save-mail (&optional group)
- "Called narrowed to an article."
- (let* ((nnmail-split-methods
- (if group (list (list group "")) nnmail-split-methods))
- (group-art-list
- (nreverse (nnmail-article-group 'nnfolder-active-number)))
- (delim (concat "^" message-unix-mail-delimiter))
- save-list group-art)
- (goto-char (point-min))
- ;; This might come from somewhere else.
- (unless (looking-at delim)
- (insert "From nobody " (current-time-string) "\n")
- (goto-char (point-min)))
- ;; Quote all "From " lines in the article.
- (forward-line 1)
- (while (re-search-forward delim nil t)
- (beginning-of-line)
- (insert "> "))
- (setq save-list group-art-list)
- (nnmail-insert-lines)
- (nnmail-insert-xref group-art-list)
- (run-hooks 'nnmail-prepare-save-mail-hook)
- (run-hooks 'nnfolder-prepare-save-mail-hook)
-
- ;; Insert the mail into each of the destination groups.
- (while group-art-list
- (setq group-art (car group-art-list)
- group-art-list (cdr group-art-list))
-
- ;; Kill the previous newsgroup markers.
- (goto-char (point-min))
- (search-forward "\n\n" nil t)
- (forward-line -1)
- (while (search-backward (concat "\n" nnfolder-article-marker) nil t)
- (delete-region (1+ (point)) (progn (forward-line 2) (point))))
-
- (nnfolder-possibly-change-group (car group-art))
- ;; Insert the new newsgroup marker.
- (nnfolder-insert-newsgroup-line group-art)
- (unless nnfolder-current-buffer
- (nnfolder-close-group (car group-art))
- (nnfolder-request-create-group (car group-art))
- (nnfolder-possibly-change-group (car group-art)))
- (let ((beg (point-min))
- (end (point-max))
- (obuf (current-buffer)))
- (set-buffer nnfolder-current-buffer)
- (goto-char (point-max))
- (unless (eolp)
- (insert "\n"))
- (insert "\n")
- (insert-buffer-substring obuf beg end)
- (set-buffer obuf)))
-
- ;; Did we save it anywhere?
- save-list))
-
- (defun nnfolder-insert-newsgroup-line (group-art)
- (save-excursion
- (goto-char (point-min))
- (if (search-forward "\n\n" nil t)
- (progn
- (forward-char -1)
- (insert (format (concat nnfolder-article-marker "%d %s\n")
- (cdr group-art) (current-time-string)))))))
-
- (defun nnfolder-possibly-activate-groups (&optional group)
- (save-excursion
- ;; If we're looking for the activation of a specific group, find out
- ;; its real name and switch to it.
- (if group (nnfolder-possibly-change-group group))
- ;; If the group alist isn't active, activate it now.
- (nnmail-activate 'nnfolder)))
-
- (defun nnfolder-active-number (group)
- (when group
- (save-excursion
- ;; Find the next article number in GROUP.
- (prog1
- (let ((active (cadr (assoc group nnfolder-group-alist))))
- (if active
- (setcdr active (1+ (cdr active)))
- ;; This group is new, so we create a new entry for it.
- ;; This might be a bit naughty... creating groups on the drop of
- ;; a hat, but I don't know...
- (setq nnfolder-group-alist
- (cons (list group (setq active (cons 1 1)))
- nnfolder-group-alist)))
- (cdr active))
- (nnmail-save-active nnfolder-group-alist nnfolder-active-file)
- (nnfolder-possibly-activate-groups group)))))
-
-
- ;; This method has a problem if you've accidentally let the active list get
- ;; out of sync with the files. This could happen, say, if you've
- ;; accidentally gotten new mail with something other than Gnus (but why
- ;; would _that_ ever happen? :-). In that case, we will be in the middle of
- ;; processing the file, ready to add new X-Gnus article number markers, and
- ;; we'll run across a message with no ID yet - the active list _may_not_ be
- ;; ready for us yet.
-
- ;; To handle this, I'm modifying this routine to maintain the maximum ID seen
- ;; so far, and when we hit a message with no ID, we will _manually_ scan the
- ;; rest of the message looking for any more, possibly higher IDs. We'll
- ;; assume the maximum that we find is the highest active. Note that this
- ;; shouldn't cost us much extra time at all, but will be a lot less
- ;; vulnerable to glitches between the mbox and the active file.
-
- (defun nnfolder-read-folder (file &optional scanning)
- ;; This is an attempt at a serious shortcut - don't even read in the file
- ;; if we know we've seen it since the last time it was touched.
- (let ((scantime (cadr (assoc nnfolder-current-group
- nnfolder-scantime-alist)))
- (modtime (nth 5 (or (file-attributes file) '(nil nil nil nil nil)))))
- (if (and scanning scantime
- (eq (car scantime) (car modtime))
- (eq (cdr scantime) (cadr modtime)))
- nil
- (save-excursion
- (nnfolder-possibly-activate-groups nil)
- ;; Read in the file.
- (set-buffer (setq nnfolder-current-buffer
- (nnheader-find-file-noselect file nil 'raw)))
- (buffer-disable-undo (current-buffer))
- ;; If the file hasn't been touched since the last time we scanned it,
- ;; don't bother doing anything with it.
- (let ((delim (concat "^" message-unix-mail-delimiter))
- (marker (concat "\n" nnfolder-article-marker))
- (number "[0-9]+")
- (active (or (cadr (assoc nnfolder-current-group
- nnfolder-group-alist))
- (cons 1 0)))
- (scantime (assoc nnfolder-current-group nnfolder-scantime-alist))
- (minid (lsh -1 -1))
- maxid start end newscantime)
-
- (setq maxid (or (cdr active) 0))
- (goto-char (point-min))
-
- ;; Anytime the active number is 1 or 0, it is suspect. In that
- ;; case, search the file manually to find the active number. Or,
- ;; of course, if we're being paranoid. (This would also be the
- ;; place to build other lists from the header markers, such as
- ;; expunge lists, etc., if we ever desired to abandon the active
- ;; file entirely for mboxes.)
- (when (or nnfolder-ignore-active-file
- (< maxid 2))
- (while (and (search-forward marker nil t)
- (re-search-forward number nil t))
- (let ((newnum (string-to-number (match-string 0))))
- (setq maxid (max maxid newnum))
- (setq minid (min minid newnum))))
- (setcar active (max 1 (min minid maxid)))
- (setcdr active (max maxid (cdr active)))
- (goto-char (point-min)))
-
- ;; As long as we trust that the user will only insert unmarked mail
- ;; at the end, go to the end and search backwards for the last
- ;; marker. Find the start of that message, and begin to search for
- ;; unmarked messages from there.
- (if (not (or nnfolder-distrust-mbox
- (< maxid 2)))
- (progn
- (goto-char (point-max))
- (if (not (re-search-backward marker nil t))
- (goto-char (point-min))
- (if (not (re-search-backward delim nil t))
- (goto-char (point-min))))))
-
- ;; Keep track of the active number on our own, and insert it back
- ;; into the active list when we're done. Also, prime the pump to
- ;; cut down on the number of searches we do.
- (setq end (point-marker))
- (set-marker end (or (and (re-search-forward delim nil t)
- (match-beginning 0))
- (point-max)))
- (while (not (= end (point-max)))
- (setq start (marker-position end))
- (goto-char end)
- ;; There may be more than one "From " line, so we skip past
- ;; them.
- (while (looking-at delim)
- (forward-line 1))
- (set-marker end (or (and (re-search-forward delim nil t)
- (match-beginning 0))
- (point-max)))
- (goto-char start)
- (if (not (search-forward marker end t))
- (progn
- (narrow-to-region start end)
- (nnmail-insert-lines)
- (nnfolder-insert-newsgroup-line
- (cons nil (nnfolder-active-number nnfolder-current-group)))
- (widen))))
-
- ;; Make absolutely sure that the active list reflects reality!
- (nnmail-save-active nnfolder-group-alist nnfolder-active-file)
- ;; Set the scantime for this group.
- (setq newscantime (visited-file-modtime))
- (if scantime
- (setcdr scantime (list newscantime))
- (push (list nnfolder-current-group newscantime)
- nnfolder-scantime-alist))
- (current-buffer))))))
-
- ;;;###autoload
- (defun nnfolder-generate-active-file ()
- "Look for mbox folders in the nnfolder directory and make them into groups."
- (interactive)
- (nnmail-activate 'nnfolder)
- (let ((files (directory-files nnfolder-directory))
- file)
- (while (setq file (pop files))
- (when (and (not (backup-file-name-p file))
- (nnheader-mail-file-mbox-p file))
- (nnheader-message 5 "Adding group %s..." file)
- (push (list file (cons 1 0)) nnfolder-group-alist)
- (nnfolder-possibly-change-group file)
- ;; (nnfolder-read-folder file)
- (nnfolder-close-group file))
- (message ""))))
-
- (defun nnfolder-group-pathname (group)
- "Make pathname for GROUP."
- (let ((dir (file-name-as-directory (expand-file-name nnfolder-directory))))
- ;; If this file exists, we use it directly.
- (if (or nnmail-use-long-file-names
- (file-exists-p (concat dir group)))
- (concat dir group)
- ;; If not, we translate dots into slashes.
- (concat dir (nnheader-replace-chars-in-string group ?. ?/)))))
-
- (defun nnfolder-save-buffer ()
- "Save the buffer."
- (when (buffer-modified-p)
- (run-hooks 'nnfolder-save-buffer-hook)
- (save-buffer)))
-
- (provide 'nnfolder)
-
- ;;; nnfolder.el ends here
-