1
0
mirror of https://git.savannah.gnu.org/git/emacs.git synced 2024-11-29 07:58:28 +00:00
emacs/lisp/gnus/nnbabyl.el

651 lines
21 KiB
EmacsLisp
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

;;; nnbabyl.el --- rmail mbox access for Gnus
;; Copyright (C) 1995-2014 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
;; Keywords: news, 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; For an overview of what the interface functions do, please see the
;; Gnus sources.
;;; Code:
(require 'nnheader)
(condition-case nil
(require 'rmail)
(error (nnheader-message
5 "Ignore rmail errors from this file, you don't have rmail")))
(require 'nnmail)
(require 'nnoo)
(eval-when-compile (require 'cl))
(nnoo-declare nnbabyl)
(defvoo nnbabyl-mbox-file (expand-file-name "~/RMAIL")
"The name of the rmail box file in the users home directory.")
(defvoo nnbabyl-active-file (expand-file-name "~/.rmail-active")
"The name of the active file for the rmail box.")
(defvoo nnbabyl-get-new-mail t
"If non-nil, nnbabyl will check the incoming mail file and split the mail.")
(defvoo nnbabyl-prepare-save-mail-hook nil
"Hook run narrowed to an article before saving.")
(defvar nnbabyl-mail-delimiter "\^_")
(defconst nnbabyl-version "nnbabyl 1.0"
"nnbabyl version.")
(defvoo nnbabyl-mbox-buffer nil)
(defvoo nnbabyl-current-group nil)
(defvoo nnbabyl-status-string "")
(defvoo nnbabyl-group-alist nil)
(defvoo nnbabyl-active-timestamp nil)
(defvoo nnbabyl-previous-buffer-mode nil)
;;; Interface functions
(nnoo-define-basics nnbabyl)
(deffoo nnbabyl-retrieve-headers (articles &optional group server fetch-old)
(with-current-buffer nntp-server-buffer
(erase-buffer)
(let ((number (length articles))
(count 0)
(delim (concat "^" nnbabyl-mail-delimiter))
article art-string start stop)
(nnbabyl-possibly-change-newsgroup group server)
(while (setq article (pop articles))
(setq art-string (nnbabyl-article-string article))
(set-buffer nnbabyl-mbox-buffer)
(end-of-line)
(when (or (search-forward art-string nil t)
(search-backward art-string nil t))
(unless (re-search-backward delim nil t)
(goto-char (point-min)))
(while (and (not (looking-at ".+:"))
(zerop (forward-line 1))))
(setq start (point))
(search-forward "\n\n" nil t)
(setq stop (1- (point)))
(set-buffer nntp-server-buffer)
(insert "221 ")
(princ article (current-buffer))
(insert " Article retrieved.\n")
(insert-buffer-substring nnbabyl-mbox-buffer start stop)
(goto-char (point-max))
(insert ".\n"))
(and (numberp nnmail-large-newsgroup)
(> number nnmail-large-newsgroup)
(zerop (% (incf count) 20))
(nnheader-message 5 "nnbabyl: Receiving headers... %d%%"
(/ (* count 100) number))))
(and (numberp nnmail-large-newsgroup)
(> number nnmail-large-newsgroup)
(nnheader-message 5 "nnbabyl: Receiving headers...done"))
(set-buffer nntp-server-buffer)
(nnheader-fold-continuation-lines)
'headers)))
(deffoo nnbabyl-open-server (server &optional defs)
(nnoo-change-server 'nnbabyl server defs)
(nnbabyl-create-mbox)
(cond
((not (file-exists-p nnbabyl-mbox-file))
(nnbabyl-close-server)
(nnheader-report 'nnbabyl "No such file: %s" nnbabyl-mbox-file))
((file-directory-p nnbabyl-mbox-file)
(nnbabyl-close-server)
(nnheader-report 'nnbabyl "Not a regular file: %s" nnbabyl-mbox-file))
(t
(nnheader-report 'nnbabyl "Opened server %s using mbox %s" server
nnbabyl-mbox-file)
t)))
(deffoo nnbabyl-close-server (&optional server)
;; Restore buffer mode.
(when (and (nnbabyl-server-opened)
nnbabyl-previous-buffer-mode)
(with-current-buffer nnbabyl-mbox-buffer
(narrow-to-region
(caar nnbabyl-previous-buffer-mode)
(cdar nnbabyl-previous-buffer-mode))
(funcall (cdr nnbabyl-previous-buffer-mode))))
(nnoo-close-server 'nnbabyl server)
(setq nnbabyl-mbox-buffer nil)
t)
(deffoo nnbabyl-server-opened (&optional server)
(and (nnoo-current-server-p 'nnbabyl server)
nnbabyl-mbox-buffer
(buffer-name nnbabyl-mbox-buffer)
nntp-server-buffer
(buffer-name nntp-server-buffer)))
(deffoo nnbabyl-request-article (article &optional newsgroup server buffer)
(nnbabyl-possibly-change-newsgroup newsgroup server)
(with-current-buffer nnbabyl-mbox-buffer
(goto-char (point-min))
(when (search-forward (nnbabyl-article-string article) nil t)
(let (start stop summary-line)
(unless (re-search-backward (concat "^" nnbabyl-mail-delimiter) nil t)
(goto-char (point-min))
(end-of-line))
(while (and (not (looking-at ".+:"))
(zerop (forward-line 1))))
(setq start (point))
(or (when (re-search-forward
(concat "^" nnbabyl-mail-delimiter) nil t)
(beginning-of-line)
t)
(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 nnbabyl-mbox-buffer start stop)
(goto-char (point-min))
;; If there is an EOOH header, then we have to remove some
;; duplicated headers.
(setq summary-line (looking-at "Summary-line:"))
(when (search-forward "\n*** EOOH ***" nil t)
(if summary-line
;; The headers to be deleted are located before the
;; EOOH line...
(delete-region (point-min) (progn (forward-line 1)
(point)))
;; ...or after.
(delete-region (progn (beginning-of-line) (point))
(or (search-forward "\n\n" nil t)
(point)))))
(if (numberp article)
(cons nnbabyl-current-group article)
(nnbabyl-article-group-number)))))))
(deffoo nnbabyl-request-group (group &optional server dont-check info)
(let ((active (cadr (assoc group nnbabyl-group-alist))))
(save-excursion
(cond
((or (null active)
(null (nnbabyl-possibly-change-newsgroup group server)))
(nnheader-report 'nnbabyl "No such group: %s" group))
(dont-check
(nnheader-report 'nnbabyl "Selected group %s" group)
(nnheader-insert ""))
(t
(nnheader-report 'nnbabyl "Selected group %s" group)
(nnheader-insert "211 %d %d %d %s\n"
(1+ (- (cdr active) (car active)))
(car active) (cdr active) group))))))
(deffoo nnbabyl-request-scan (&optional group server)
(nnbabyl-possibly-change-newsgroup group server)
(nnbabyl-read-mbox)
(nnmail-get-new-mail
'nnbabyl
(lambda ()
(with-current-buffer nnbabyl-mbox-buffer
(save-buffer)))
(file-name-directory nnbabyl-mbox-file)
group
(lambda ()
(save-excursion
(let ((in-buf (current-buffer)))
(goto-char (point-min))
(while (search-forward "\n\^_\n" nil t)
(delete-char -1))
(set-buffer nnbabyl-mbox-buffer)
(goto-char (point-max))
(search-backward "\n\^_" nil t)
(goto-char (match-end 0))
(insert-buffer-substring in-buf)))
(nnmail-save-active nnbabyl-group-alist nnbabyl-active-file))))
(deffoo nnbabyl-close-group (group &optional server)
t)
(deffoo nnbabyl-request-create-group (group &optional server args)
(nnmail-activate 'nnbabyl)
(unless (assoc group nnbabyl-group-alist)
(push (list group (cons 1 0))
nnbabyl-group-alist)
(nnmail-save-active nnbabyl-group-alist nnbabyl-active-file))
t)
(deffoo nnbabyl-request-list (&optional server)
(save-excursion
(nnmail-find-file nnbabyl-active-file)
(setq nnbabyl-group-alist (nnmail-get-active))
t))
(deffoo nnbabyl-request-newgroups (date &optional server)
(nnbabyl-request-list server))
(deffoo nnbabyl-request-list-newsgroups (&optional server)
(nnheader-report 'nnbabyl "nnbabyl: LIST NEWSGROUPS is not implemented."))
(deffoo nnbabyl-request-expire-articles
(articles newsgroup &optional server force)
(nnbabyl-possibly-change-newsgroup newsgroup server)
(let* ((is-old t)
rest)
(nnmail-activate 'nnbabyl)
(with-current-buffer nnbabyl-mbox-buffer
(set-text-properties (point-min) (point-max) nil)
(while (and articles is-old)
(goto-char (point-min))
(when (search-forward (nnbabyl-article-string (car articles)) nil t)
(if (setq is-old
(nnmail-expired-article-p
newsgroup
(buffer-substring
(point) (progn (end-of-line) (point))) force))
(progn
(unless (eq nnmail-expiry-target 'delete)
(with-temp-buffer
(nnbabyl-request-article (car articles)
newsgroup server
(current-buffer))
(let ((nnml-current-directory nil))
(nnmail-expiry-target-group
nnmail-expiry-target newsgroup)))
(nnbabyl-possibly-change-newsgroup newsgroup server))
(nnheader-message 5 "Deleting article %d in %s..."
(car articles) newsgroup)
(nnbabyl-delete-mail))
(push (car articles) rest)))
(setq articles (cdr articles)))
(save-buffer)
;; Find the lowest active article in this group.
(let ((active (nth 1 (assoc newsgroup nnbabyl-group-alist))))
(goto-char (point-min))
(while (and (not (search-forward
(nnbabyl-article-string (car active)) nil t))
(<= (car active) (cdr active)))
(setcar active (1+ (car active)))
(goto-char (point-min))))
(nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)
(nconc rest articles))))
(deffoo nnbabyl-request-move-article
(article group server accept-form &optional last move-is-internal)
(let ((buf (get-buffer-create " *nnbabyl move*"))
result)
(and
(nnbabyl-request-article article group server)
(with-current-buffer buf
(insert-buffer-substring nntp-server-buffer)
(goto-char (point-min))
(while (re-search-forward
"^X-Gnus-Newsgroup:"
(save-excursion (search-forward "\n\n" nil t) (point)) t)
(delete-region (point-at-bol) (progn (forward-line 1) (point))))
(setq result (eval accept-form))
(kill-buffer (current-buffer))
result)
(save-excursion
(nnbabyl-possibly-change-newsgroup group server)
(set-buffer nnbabyl-mbox-buffer)
(goto-char (point-min))
(if (search-forward (nnbabyl-article-string article) nil t)
(nnbabyl-delete-mail))
(and last (save-buffer))))
result))
(deffoo nnbabyl-request-accept-article (group &optional server last)
(nnbabyl-possibly-change-newsgroup group server)
(nnmail-check-syntax)
(let ((buf (current-buffer))
result beg)
(and
(nnmail-activate 'nnbabyl)
(save-excursion
(goto-char (point-min))
(search-forward "\n\n" nil t)
(forward-line -1)
(save-excursion
(while (re-search-backward "^X-Gnus-Newsgroup: " beg t)
(delete-region (point) (progn (forward-line 1) (point)))))
(when nnmail-cache-accepted-message-ids
(nnmail-cache-insert (nnmail-fetch-field "message-id")
group
(nnmail-fetch-field "subject")
(nnmail-fetch-field "from")))
(setq result
(if (stringp group)
(list (cons group (nnbabyl-active-number group)))
(nnmail-article-group 'nnbabyl-active-number)))
(if (and (null result)
(yes-or-no-p "Moved to `junk' group; delete article? "))
(setq result 'junk)
(setq result (car (nnbabyl-save-mail result))))
(set-buffer nnbabyl-mbox-buffer)
(goto-char (point-max))
(search-backward "\n\^_")
(goto-char (match-end 0))
(insert-buffer-substring buf)
(when last
(when nnmail-cache-accepted-message-ids
(nnmail-cache-insert (nnmail-fetch-field "message-id")
group
(nnmail-fetch-field "subject")
(nnmail-fetch-field "from")))
(save-buffer)
(nnmail-save-active nnbabyl-group-alist nnbabyl-active-file))
result))))
(deffoo nnbabyl-request-replace-article (article group buffer)
(nnbabyl-possibly-change-newsgroup group)
(with-current-buffer nnbabyl-mbox-buffer
(goto-char (point-min))
(if (not (search-forward (nnbabyl-article-string article) nil t))
nil
(nnbabyl-delete-mail t t)
(insert-buffer-substring buffer)
(save-buffer)
t)))
(deffoo nnbabyl-request-delete-group (group &optional force server)
(nnbabyl-possibly-change-newsgroup group server)
;; Delete all articles in GROUP.
(if (not force)
() ; Don't delete the articles.
(with-current-buffer nnbabyl-mbox-buffer
(goto-char (point-min))
;; Delete all articles in this group.
(let ((ident (concat "\nX-Gnus-Newsgroup: " nnbabyl-current-group ":"))
found)
(while (search-forward ident nil t)
(setq found t)
(nnbabyl-delete-mail))
(when found
(save-buffer)))))
;; Remove the group from all structures.
(setq nnbabyl-group-alist
(delq (assoc group nnbabyl-group-alist) nnbabyl-group-alist)
nnbabyl-current-group nil)
;; Save the active file.
(nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)
t)
(deffoo nnbabyl-request-rename-group (group new-name &optional server)
(nnbabyl-possibly-change-newsgroup group server)
(with-current-buffer nnbabyl-mbox-buffer
(goto-char (point-min))
(let ((ident (concat "\nX-Gnus-Newsgroup: " nnbabyl-current-group ":"))
(new-ident (concat "\nX-Gnus-Newsgroup: " new-name ":"))
found)
(while (search-forward ident nil t)
(replace-match new-ident t t)
(setq found t))
(when found
(save-buffer))))
(let ((entry (assoc group nnbabyl-group-alist)))
(and entry (setcar entry new-name))
(setq nnbabyl-current-group nil)
;; Save the new group alist.
(nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)
t))
;;; Internal functions.
;; If FORCE, delete article no matter how many X-Gnus-Newsgroup
;; headers there are. If LEAVE-DELIM, don't delete the Unix mbox
;; delimiter line.
(defun nnbabyl-delete-mail (&optional force leave-delim)
;; Delete the current X-Gnus-Newsgroup line.
(unless force
(delete-region (point-at-bol) (progn (forward-line 1) (point))))
;; Beginning of the article.
(save-excursion
(save-restriction
(widen)
(narrow-to-region
(save-excursion
(unless (re-search-backward (concat "^" nnbabyl-mail-delimiter) nil t)
(goto-char (point-min))
(end-of-line))
(if leave-delim (progn (forward-line 1) (point))
(match-beginning 0)))
(progn
(forward-line 1)
(or (and (re-search-forward (concat "^" nnbabyl-mail-delimiter)
nil t)
(match-beginning 0))
(point-max))))
(goto-char (point-min))
;; Only delete the article if no other groups owns it as well.
(when (or force (not (re-search-forward "^X-Gnus-Newsgroup: " nil t)))
(delete-region (point-min) (point-max))))))
(defun nnbabyl-possibly-change-newsgroup (newsgroup &optional server)
(when (and server
(not (nnbabyl-server-opened server)))
(nnbabyl-open-server server))
(when (or (not nnbabyl-mbox-buffer)
(not (buffer-name nnbabyl-mbox-buffer)))
(save-excursion (nnbabyl-read-mbox)))
(unless nnbabyl-group-alist
(nnmail-activate 'nnbabyl))
(if newsgroup
(if (assoc newsgroup nnbabyl-group-alist)
(setq nnbabyl-current-group newsgroup)
(nnheader-report 'nnbabyl "No such group in file"))
t))
(defun nnbabyl-article-string (article)
(if (numberp article)
(concat "\nX-Gnus-Newsgroup: " nnbabyl-current-group ":"
(int-to-string article) " ")
(concat "\nMessage-ID: " article)))
(defun nnbabyl-article-group-number ()
(save-excursion
(goto-char (point-min))
(when (re-search-forward "^X-Gnus-Newsgroup: +\\([^:]+\\):\\([0-9]+\\) "
nil t)
(cons (buffer-substring (match-beginning 1) (match-end 1))
(string-to-number
(buffer-substring (match-beginning 2) (match-end 2)))))))
(defun nnbabyl-insert-lines ()
"Insert how many lines and chars there are in the body of the mail."
(let (lines chars)
(save-excursion
(goto-char (point-min))
(when (search-forward "\n\n" nil t)
;; There may be an EOOH line here...
(when (looking-at "\\*\\*\\* EOOH \\*\\*\\*")
(search-forward "\n\n" nil t))
(setq chars (- (point-max) (point))
lines (max (- (count-lines (point) (point-max)) 1) 0))
;; Move back to the end of the headers.
(goto-char (point-min))
(search-forward "\n\n" nil t)
(forward-char -1)
(save-excursion
(when (re-search-backward "^Lines: " nil t)
(delete-region (point) (progn (forward-line 1) (point)))))
(insert (format "Lines: %d\n" lines))
chars))))
(defun nnbabyl-save-mail (group-art)
;; Called narrowed to an article.
(nnbabyl-insert-lines)
(nnmail-insert-xref group-art)
(nnbabyl-insert-newsgroup-line group-art)
(run-hooks 'nnbabyl-prepare-save-mail-hook)
group-art)
(defun nnbabyl-insert-newsgroup-line (group-art)
(save-excursion
(goto-char (point-min))
(while (looking-at "From ")
(replace-match "Mail-from: From " t t)
(forward-line 1))
;; If there is a C-l at the beginning of the narrowed region, this
;; isn't really a "save", but rather a "scan".
(goto-char (point-min))
(unless (looking-at "\^L")
(save-excursion
(insert "\^L\n0, unseen,,\n*** EOOH ***\n")
(goto-char (point-max))
(insert "\^_\n")))
(when (search-forward "\n\n" nil t)
(forward-char -1)
(while group-art
(insert (format "X-Gnus-Newsgroup: %s:%d %s\n"
(caar group-art) (cdar group-art)
(current-time-string)))
(setq group-art (cdr group-art))))
t))
(defun nnbabyl-active-number (group)
;; Find the next article number in GROUP.
(let ((active (cadr (assoc group nnbabyl-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...
(push (list group (setq active (cons 1 1)))
nnbabyl-group-alist))
(cdr active)))
(defun nnbabyl-create-mbox ()
(unless (file-exists-p nnbabyl-mbox-file)
;; Create a new, empty RMAIL mbox file.
(with-current-buffer (setq nnbabyl-mbox-buffer
(create-file-buffer nnbabyl-mbox-file))
(setq buffer-file-name nnbabyl-mbox-file)
(insert "BABYL OPTIONS:\n\n\^_")
(nnmail-write-region
(point-min) (point-max) nnbabyl-mbox-file t 'nomesg))))
(defun nnbabyl-read-mbox ()
(nnmail-activate 'nnbabyl)
(nnbabyl-create-mbox)
(unless (and nnbabyl-mbox-buffer
(buffer-name nnbabyl-mbox-buffer)
(with-current-buffer nnbabyl-mbox-buffer
(= (buffer-size) (nnheader-file-size nnbabyl-mbox-file))))
;; This buffer has changed since we read it last. Possibly.
(save-excursion
(let ((delim (concat "^" nnbabyl-mail-delimiter))
(alist nnbabyl-group-alist)
start end number)
(set-buffer (setq nnbabyl-mbox-buffer
(nnheader-find-file-noselect
nnbabyl-mbox-file nil t)))
;; Save previous buffer mode.
(setq nnbabyl-previous-buffer-mode
(cons (cons (point-min) (point-max))
major-mode))
(buffer-disable-undo)
(widen)
(setq buffer-read-only nil)
(fundamental-mode)
;; Go through the group alist and compare against
;; the rmail file.
(while alist
(goto-char (point-max))
(when (and (re-search-backward
(format "^X-Gnus-Newsgroup: %s:\\([0-9]+\\) "
(caar alist))
nil t)
(> (setq number
(string-to-number
(buffer-substring
(match-beginning 1) (match-end 1))))
(cdadar alist)))
(setcdr (cadar alist) number))
(setq alist (cdr alist)))
;; We go through the mbox and make sure that each and
;; every mail belongs to some group or other.
(goto-char (point-min))
(if (looking-at "\^L")
(setq start (point))
(re-search-forward delim nil t)
(setq start (match-end 0)))
(while (re-search-forward delim nil t)
(setq end (match-end 0))
(unless (search-backward "\nX-Gnus-Newsgroup: " start t)
(goto-char end)
(save-excursion
(save-restriction
(narrow-to-region (goto-char start) end)
(nnbabyl-save-mail
(nnmail-article-group 'nnbabyl-active-number))
(setq end (point-max)))))
(goto-char (setq start end)))
(when (buffer-modified-p (current-buffer))
(save-buffer))
(nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)))))
(defun nnbabyl-remove-incoming-delims ()
(goto-char (point-min))
(while (search-forward "\^_" nil t)
(replace-match "?" t t)))
(defun nnbabyl-check-mbox ()
"Go through the nnbabyl mbox and make sure that no article numbers are reused."
(interactive)
(let ((idents (make-vector 1000 0))
id)
(save-excursion
(when (or (not nnbabyl-mbox-buffer)
(not (buffer-name nnbabyl-mbox-buffer)))
(nnbabyl-read-mbox))
(set-buffer nnbabyl-mbox-buffer)
(goto-char (point-min))
(while (re-search-forward "^X-Gnus-Newsgroup: \\([^ ]+\\) " nil t)
(if (intern-soft (setq id (match-string 1)) idents)
(progn
(delete-region (point-at-bol) (progn (forward-line 1) (point)))
(nnheader-message 7 "Moving %s..." id)
(nnbabyl-save-mail
(nnmail-article-group 'nnbabyl-active-number)))
(intern id idents)))
(when (buffer-modified-p (current-buffer))
(save-buffer))
(nnmail-save-active nnbabyl-group-alist nnbabyl-active-file)
(nnheader-message 5 ""))))
(provide 'nnbabyl)
;;; nnbabyl.el ends here