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emacs/lisp/gnus/nnwarchive.el
2009-01-05 03:18:22 +00:00

728 lines
22 KiB
EmacsLisp

;;; nnwarchive.el --- interfacing with web archives
;; Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004,
;; 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
;; Keywords: news egroups mail-archive
;; 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:
;; Note: You need to have `url' (w3 0.46) or greater version
;; installed for some functions of this backend to work.
;; Todo:
;; 1. To support more web archives.
;; 2. Generalize webmail to other MHonArc archive.
;;; Code:
(eval-when-compile (require 'cl))
(require 'nnoo)
(require 'message)
(require 'gnus-util)
(require 'gnus)
(require 'gnus-bcklg)
(require 'nnmail)
(require 'mm-util)
(require 'mm-url)
(nnoo-declare nnwarchive)
(defvar nnwarchive-type-definition
'((egroups
(address . "www.egroups.com")
(open-url
"http://www.egroups.com/login.cgi?&login_email=%s&login_password=%s"
nnwarchive-login nnwarchive-passwd)
(list-url
"http://www.egroups.com/mygroups")
(list-dissect . nnwarchive-egroups-list)
(list-groups . nnwarchive-egroups-list-groups)
(xover-url
"http://www.egroups.com/messages/%s/%d" group aux)
(xover-last-url
"http://www.egroups.com/messages/%s/" group)
(xover-page-size . 13)
(xover-dissect . nnwarchive-egroups-xover)
(article-url
"http://www.egroups.com/message/%s/%d?source=1" group article)
(article-dissect . nnwarchive-egroups-article)
(authentication . t)
(article-offset . 0)
(xover-files . nnwarchive-egroups-xover-files))
(mail-archive
(address . "www.mail-archive.com")
(open-url)
(list-url
"http://www.mail-archive.com/lists.html")
(list-dissect . nnwarchive-mail-archive-list)
(list-groups . nnwarchive-mail-archive-list-groups)
(xover-url
"http://www.mail-archive.com/%s/mail%d.html" group aux)
(xover-last-url
"http://www.mail-archive.com/%s/maillist.html" group)
(xover-page-size)
(xover-dissect . nnwarchive-mail-archive-xover)
(article-url
"http://www.mail-archive.com/%s/msg%05d.html" group article1)
(article-dissect . nnwarchive-mail-archive-article)
(xover-files . nnwarchive-mail-archive-xover-files)
(authentication)
(article-offset . 1))))
(defvar nnwarchive-default-type 'egroups)
(defvoo nnwarchive-directory (nnheader-concat gnus-directory "warchive/")
"Where nnwarchive will save its files.")
(defvoo nnwarchive-type nil
"The type of nnwarchive.")
(defvoo nnwarchive-address ""
"The address of nnwarchive.")
(defvoo nnwarchive-login nil
"Your login name for the group.")
(defvoo nnwarchive-passwd nil
"Your password for the group.")
(defvoo nnwarchive-groups nil)
(defvoo nnwarchive-headers-cache nil)
(defvoo nnwarchive-authentication nil)
(defvoo nnwarchive-nov-is-evil nil)
(defconst nnwarchive-version "nnwarchive 1.0")
;;; Internal variables
(defvoo nnwarchive-open-url nil)
(defvoo nnwarchive-open-dissect nil)
(defvoo nnwarchive-list-url nil)
(defvoo nnwarchive-list-dissect nil)
(defvoo nnwarchive-list-groups nil)
(defvoo nnwarchive-xover-files nil)
(defvoo nnwarchive-xover-url nil)
(defvoo nnwarchive-xover-last-url nil)
(defvoo nnwarchive-xover-dissect nil)
(defvoo nnwarchive-xover-page-size nil)
(defvoo nnwarchive-article-url nil)
(defvoo nnwarchive-article-dissect nil)
(defvoo nnwarchive-xover-files nil)
(defvoo nnwarchive-article-offset 0)
(defvoo nnwarchive-buffer nil)
(defvoo nnwarchive-keep-backlog 300)
(defvar nnwarchive-backlog-articles nil)
(defvar nnwarchive-backlog-hashtb nil)
(defvoo nnwarchive-headers nil)
;;; Interface functions
(nnoo-define-basics nnwarchive)
(defun nnwarchive-set-default (type)
(let ((defs (cdr (assq type nnwarchive-type-definition)))
def)
(dolist (def defs)
(set (intern (concat "nnwarchive-" (symbol-name (car def))))
(cdr def)))))
(defmacro nnwarchive-backlog (&rest form)
`(let ((gnus-keep-backlog nnwarchive-keep-backlog)
(gnus-backlog-buffer
(format " *nnwarchive backlog %s*" nnwarchive-address))
(gnus-backlog-articles nnwarchive-backlog-articles)
(gnus-backlog-hashtb nnwarchive-backlog-hashtb))
(unwind-protect
(progn ,@form)
(setq nnwarchive-backlog-articles gnus-backlog-articles
nnwarchive-backlog-hashtb gnus-backlog-hashtb))))
(put 'nnwarchive-backlog 'lisp-indent-function 0)
(put 'nnwarchive-backlog 'edebug-form-spec '(form body))
(defun nnwarchive-backlog-enter-article (group number buffer)
(nnwarchive-backlog
(gnus-backlog-enter-article group number buffer)))
(defun nnwarchive-get-article (article &optional group server buffer)
(if (numberp article)
(if (nnwarchive-backlog
(gnus-backlog-request-article group article
(or buffer nntp-server-buffer)))
(cons group article)
(let (contents)
(save-excursion
(set-buffer nnwarchive-buffer)
(goto-char (point-min))
(let ((article1 (- article nnwarchive-article-offset)))
(nnwarchive-url nnwarchive-article-url))
(setq contents (funcall nnwarchive-article-dissect group article)))
(when contents
(save-excursion
(set-buffer (or buffer nntp-server-buffer))
(erase-buffer)
(insert contents)
(nnwarchive-backlog-enter-article group article (current-buffer))
(nnheader-report 'nnwarchive "Fetched article %s" article)
(cons group article)))))
nil))
(deffoo nnwarchive-retrieve-headers (articles &optional group server fetch-old)
(nnwarchive-possibly-change-server group server)
(if (or gnus-nov-is-evil nnwarchive-nov-is-evil)
(with-temp-buffer
(with-current-buffer nntp-server-buffer
(erase-buffer))
(let ((buf (current-buffer)) b e)
(dolist (art articles)
(nnwarchive-get-article art group server buf)
(setq b (goto-char (point-min)))
(if (search-forward "\n\n" nil t)
(forward-char -1)
(goto-char (point-max)))
(setq e (point))
(with-current-buffer nntp-server-buffer
(insert (format "221 %d Article retrieved.\n" art))
(insert-buffer-substring buf b e)
(insert ".\n"))))
'headers)
(setq nnwarchive-headers (cdr (assoc group nnwarchive-headers-cache)))
(save-excursion
(set-buffer nnwarchive-buffer)
(erase-buffer)
(funcall nnwarchive-xover-files group articles))
(save-excursion
(set-buffer nntp-server-buffer)
(erase-buffer)
(let (header)
(dolist (art articles)
(if (setq header (assq art nnwarchive-headers))
(nnheader-insert-nov (cdr header))))))
(let ((elem (assoc group nnwarchive-headers-cache)))
(if elem
(setcdr elem nnwarchive-headers)
(push (cons group nnwarchive-headers) nnwarchive-headers-cache)))
'nov))
(deffoo nnwarchive-request-group (group &optional server dont-check)
(nnwarchive-possibly-change-server nil server)
(when (and (not dont-check) nnwarchive-list-groups)
(funcall nnwarchive-list-groups (list group))
(nnwarchive-write-groups))
(let ((elem (assoc group nnwarchive-groups)))
(cond
((not elem)
(nnheader-report 'nnwarchive "Group does not exist"))
(t
(nnheader-report 'nnwarchive "Opened group %s" group)
(nnheader-insert
"211 %d %d %d %s\n" (or (cadr elem) 0) 1 (or (cadr elem) 0)
(prin1-to-string group))
t))))
(deffoo nnwarchive-request-article (article &optional group server buffer)
(nnwarchive-possibly-change-server group server)
(nnwarchive-get-article article group server buffer))
(deffoo nnwarchive-close-server (&optional server)
(when (and (nnwarchive-server-opened server)
(gnus-buffer-live-p nnwarchive-buffer))
(save-excursion
(set-buffer nnwarchive-buffer)
(kill-buffer nnwarchive-buffer)))
(nnwarchive-backlog
(gnus-backlog-shutdown))
(nnoo-close-server 'nnwarchive server))
(deffoo nnwarchive-request-list (&optional server)
(nnwarchive-possibly-change-server nil server)
(save-excursion
(set-buffer nnwarchive-buffer)
(erase-buffer)
(if nnwarchive-list-url
(nnwarchive-url nnwarchive-list-url))
(if nnwarchive-list-dissect
(funcall nnwarchive-list-dissect))
(nnwarchive-write-groups)
(nnwarchive-generate-active))
t)
(deffoo nnwarchive-open-server (server &optional defs connectionless)
(nnoo-change-server 'nnwarchive server defs)
(nnwarchive-init server)
(when nnwarchive-authentication
(setq nnwarchive-login
(or nnwarchive-login
(read-string
(format "Login at %s: " server)
user-mail-address)))
(setq nnwarchive-passwd
(or nnwarchive-passwd
(read-passwd
(format "Password for %s at %s: "
nnwarchive-login server)))))
(unless nnwarchive-groups
(nnwarchive-read-groups))
(save-excursion
(set-buffer nnwarchive-buffer)
(erase-buffer)
(if nnwarchive-open-url
(nnwarchive-url nnwarchive-open-url))
(if nnwarchive-open-dissect
(funcall nnwarchive-open-dissect)))
t)
(nnoo-define-skeleton nnwarchive)
;;; Internal functions
(defun nnwarchive-possibly-change-server (&optional group server)
(nnwarchive-init server)
(when (and server
(not (nnwarchive-server-opened server)))
(nnwarchive-open-server server)))
(defun nnwarchive-read-groups ()
(let ((file (expand-file-name (concat "groups-" nnwarchive-address)
nnwarchive-directory)))
(when (file-exists-p file)
(with-temp-buffer
(insert-file-contents file)
(goto-char (point-min))
(setq nnwarchive-groups (read (current-buffer)))))))
(defun nnwarchive-write-groups ()
(with-temp-file (expand-file-name (concat "groups-" nnwarchive-address)
nnwarchive-directory)
(prin1 nnwarchive-groups (current-buffer))))
(defun nnwarchive-init (server)
"Initialize buffers and such."
(let ((type (intern server)) (defs nnwarchive-type-definition) def)
(cond
((equal server "")
(setq type nnwarchive-default-type))
((assq type nnwarchive-type-definition) t)
(t
(setq type nil)
(while (setq def (pop defs))
(when (equal (cdr (assq 'address (cdr def))) server)
(setq defs nil)
(setq type (car def))))
(unless type
(error "Undefined server %s" server))))
(setq nnwarchive-type type))
(unless (file-exists-p nnwarchive-directory)
(gnus-make-directory nnwarchive-directory))
(unless (gnus-buffer-live-p nnwarchive-buffer)
(setq nnwarchive-buffer
(save-excursion
(nnheader-set-temp-buffer
(format " *nnwarchive %s %s*" nnwarchive-type server)))))
(nnwarchive-set-default nnwarchive-type))
(defun nnwarchive-eval (expr)
(cond
((consp expr)
(cons (nnwarchive-eval (car expr)) (nnwarchive-eval (cdr expr))))
((symbolp expr)
(eval expr))
(t
expr)))
(defun nnwarchive-url (xurl)
(mm-with-unibyte-current-buffer
(let ((url-confirmation-func 'identity) ;; Some hacks.
(url-cookie-multiple-line nil))
(cond
((eq (car xurl) 'post)
(pop xurl)
(mm-url-fetch-form (car xurl) (nnwarchive-eval (cdr xurl))))
(t
(mm-url-insert (apply 'format (nnwarchive-eval xurl))))))))
(defun nnwarchive-generate-active ()
(save-excursion
(set-buffer nntp-server-buffer)
(erase-buffer)
(dolist (elem nnwarchive-groups)
(insert (prin1-to-string (car elem))
" " (number-to-string (or (cadr elem) 0)) " 1 y\n"))))
(defun nnwarchive-paged (articles)
(let (art narts next)
(while (setq art (pop articles))
(when (and (>= art (or next 0))
(not (assq art nnwarchive-headers)))
(push art narts)
(setq next (+ art nnwarchive-xover-page-size))))
narts))
;; egroups
(defun nnwarchive-egroups-list-groups (groups)
(save-excursion
(let (articles)
(set-buffer nnwarchive-buffer)
(dolist (group groups)
(erase-buffer)
(nnwarchive-url nnwarchive-xover-last-url)
(goto-char (point-min))
(when (re-search-forward "of \\([0-9]+\\)[ \t\n\r]*</title>" nil t)
(setq articles (string-to-number (match-string 1))))
(let ((elem (assoc group nnwarchive-groups)))
(if elem
(setcar (cdr elem) articles)
(push (list group articles "") nnwarchive-groups)))
(setq nnwarchive-headers (cdr (assoc group nnwarchive-headers-cache)))
(nnwarchive-egroups-xover group)
(let ((elem (assoc group nnwarchive-headers-cache)))
(if elem
(setcdr elem nnwarchive-headers)
(push (cons group nnwarchive-headers) nnwarchive-headers-cache)))))))
(defun nnwarchive-egroups-list ()
(let ((case-fold-search t)
group description elem articles)
(goto-char (point-min))
(while
(re-search-forward "href=\"/group/\\([^/\"\> ]+\\)" nil t)
(setq group (match-string 1)
description (match-string 2))
(if (setq elem (assoc group nnwarchive-groups))
(setcar (cdr elem) 0)
(push (list group articles description) nnwarchive-groups))))
t)
(defun nnwarchive-egroups-xover (group)
(let (article subject from date)
(goto-char (point-min))
(while (re-search-forward
"<a href=\"/group/\\([^/]+\\)/\\([0-9]+\\)[^>]+>\\([^<]+\\)<"
nil t)
(setq group (match-string 1)
article (string-to-number (match-string 2))
subject (match-string 3))
(forward-line 1)
(unless (assq article nnwarchive-headers)
(if (looking-at "<td[^>]+><font[^>]+>\\([^<]+\\)</font>")
(setq from (match-string 1)))
(forward-line 1)
(if (looking-at "<td[^>]+><font[^>]+>\\([^<]+\\)</font>")
(setq date (identity (match-string 1))))
(push (cons
article
(make-full-mail-header
article
(mm-url-decode-entities-string subject)
(mm-url-decode-entities-string from)
date
(concat "<" group "%"
(number-to-string article)
"@egroup.com>")
""
0 0 "")) nnwarchive-headers))))
nnwarchive-headers)
(defun nnwarchive-egroups-article (group articles)
(goto-char (point-min))
(if (search-forward "<pre>" nil t)
(delete-region (point-min) (point)))
(goto-char (point-max))
(if (search-backward "</pre>" nil t)
(delete-region (point) (point-max)))
(goto-char (point-min))
(while (re-search-forward "<a[^>]+>\\([^<]+\\)</a>" nil t)
(replace-match "\\1"))
(mm-url-decode-entities)
(buffer-string))
(defun nnwarchive-egroups-xover-files (group articles)
(let (aux auxs)
(setq auxs (nnwarchive-paged (sort articles '<)))
(while (setq aux (pop auxs))
(goto-char (point-max))
(nnwarchive-url nnwarchive-xover-url))
(if nnwarchive-xover-dissect
(nnwarchive-egroups-xover group))))
;; mail-archive
(defun nnwarchive-mail-archive-list-groups (groups)
(save-excursion
(let (articles)
(set-buffer nnwarchive-buffer)
(dolist (group groups)
(erase-buffer)
(nnwarchive-url nnwarchive-xover-last-url)
(goto-char (point-min))
(when (re-search-forward "msg\\([0-9]+\\)\\.html" nil t)
(setq articles (1+ (string-to-number (match-string 1)))))
(let ((elem (assoc group nnwarchive-groups)))
(if elem
(setcar (cdr elem) articles)
(push (list group articles "") nnwarchive-groups)))
(setq nnwarchive-headers (cdr (assoc group nnwarchive-headers-cache)))
(nnwarchive-mail-archive-xover group)
(let ((elem (assoc group nnwarchive-headers-cache)))
(if elem
(setcdr elem nnwarchive-headers)
(push (cons group nnwarchive-headers)
nnwarchive-headers-cache)))))))
(defun nnwarchive-mail-archive-list ()
(let ((case-fold-search t)
group description elem articles)
(goto-char (point-min))
(while (re-search-forward "<a href=\"\\([^/]+\\)/\">\\([^>]+\\)<" nil t)
(setq group (match-string 1)
description (match-string 2))
(forward-line 1)
(setq articles 0)
(if (setq elem (assoc group nnwarchive-groups))
(setcar (cdr elem) articles)
(push (list group articles description) nnwarchive-groups))))
t)
(defun nnwarchive-mail-archive-xover (group)
(let (article subject from date)
(goto-char (point-min))
(while (re-search-forward
"<A[^>]*HREF=\"msg\\([0-9]+\\)\\.html[^>]+>\\([^<]+\\)<"
nil t)
(setq article (1+ (string-to-number (match-string 1)))
subject (match-string 2))
(forward-line 1)
(unless (assq article nnwarchive-headers)
(if (looking-at "<UL><LI><EM>From</EM>: *\\([^<]*[^< ]\\) *&lt;\\([^&]+\\)&gt;")
(progn
(setq from (match-string 1)
date (identity (match-string 2))))
(setq from "" date ""))
(push (cons
article
(make-full-mail-header
article
(mm-url-decode-entities-string subject)
(mm-url-decode-entities-string from)
date
(format "<%05d%%%s>\n" (1- article) group)
""
0 0 "")) nnwarchive-headers))))
nnwarchive-headers)
(defun nnwarchive-mail-archive-xover-files (group articles)
(unless nnwarchive-headers
(erase-buffer)
(nnwarchive-url nnwarchive-xover-last-url)
(goto-char (point-min))
(nnwarchive-mail-archive-xover group))
(let ((minart (apply 'min articles))
(min (apply 'min (mapcar 'car nnwarchive-headers)))
(aux 2))
(while (> min minart)
(erase-buffer)
(nnwarchive-url nnwarchive-xover-url)
(nnwarchive-mail-archive-xover group)
(setq min (apply 'min (mapcar 'car nnwarchive-headers))))))
(defvar nnwarchive-caesar-translation-table nil
"Modified rot13 table. tr/@A-Z[a-z/N-Z[@A-Mn-za-m/.")
(defun nnwarchive-make-caesar-translation-table ()
"Create modified rot13 table. tr/@A-Z[a-z/N-Z[@A-Mn-za-m/."
(let ((i -1)
(table (make-string 256 0))
(a (mm-char-int ?a))
(A (mm-char-int ?A)))
(while (< (incf i) 256)
(aset table i i))
(concat
(substring table 0 (1- A))
(substring table (+ A 13) (+ A 27))
(substring table (1- A) (+ A 13))
(substring table (+ A 27) a)
(substring table (+ a 13) (+ a 26))
(substring table a (+ a 13))
(substring table (+ a 26) 255))))
(defun nnwarchive-from-r13 (from-r13)
(when from-r13
(with-temp-buffer
(insert from-r13)
(let ((message-caesar-translation-table
(or nnwarchive-caesar-translation-table
(setq nnwarchive-caesar-translation-table
(nnwarchive-make-caesar-translation-table)))))
(message-caesar-region (point-min) (point-max))
(buffer-string)))))
(defun nnwarchive-mail-archive-article (group article)
(let (p refs url mime e
from subject date id
done
(case-fold-search t))
(save-restriction
(goto-char (point-min))
(when (search-forward "X-Head-End" nil t)
(beginning-of-line)
(narrow-to-region (point-min) (point))
(mm-url-decode-entities)
(goto-char (point-min))
(while (search-forward "<!--X-" nil t)
(replace-match ""))
(goto-char (point-min))
(while (search-forward " -->" nil t)
(replace-match ""))
(setq from
(or (mail-fetch-field "from")
(nnwarchive-from-r13
(mail-fetch-field "from-r13"))))
(setq date (mail-fetch-field "date"))
(setq id (mail-fetch-field "message-id"))
(setq subject (mail-fetch-field "subject"))
(goto-char (point-max))
(widen))
(when (search-forward "<ul>" nil t)
(forward-line)
(delete-region (point-min) (point))
(search-forward "</ul>" nil t)
(end-of-line)
(narrow-to-region (point-min) (point))
(mm-url-remove-markup)
(mm-url-decode-entities)
(goto-char (point-min))
(delete-blank-lines)
(when from
(message-remove-header "from")
(goto-char (point-max))
(insert "From: " from "\n"))
(when subject
(message-remove-header "subject")
(goto-char (point-max))
(insert "Subject: " subject "\n"))
(when id
(goto-char (point-max))
(insert "X-Message-ID: <" id ">\n"))
(when date
(message-remove-header "date")
(goto-char (point-max))
(insert "Date: " date "\n"))
(goto-char (point-max))
(widen)
(insert "\n"))
(setq p (point))
(when (search-forward "X-Body-of-Message" nil t)
(forward-line)
(delete-region p (point))
(search-forward "X-Body-of-Message-End" nil t)
(beginning-of-line)
(save-restriction
(narrow-to-region p (point))
(goto-char (point-min))
(if (> (skip-chars-forward "\040\n\r\t") 0)
(delete-region (point-min) (point)))
(while (not (eobp))
(cond
((looking-at "<PRE>\r?\n?")
(delete-region (match-beginning 0) (match-end 0))
(setq p (point))
(when (search-forward "</PRE>" nil t)
(delete-region (match-beginning 0) (match-end 0))
(save-restriction
(narrow-to-region p (point))
(mm-url-remove-markup)
(mm-url-decode-entities)
(goto-char (point-max)))))
((looking-at "<P><A HREF=\"\\([^\"]+\\)")
(setq url (match-string 1))
(delete-region (match-beginning 0)
(progn (forward-line) (point)))
;; I hate to download the url encode it, then immediately
;; decode it.
(insert "<#external"
" type="
(or (and url
(string-match "\\.[^\\.]+$" url)
(mailcap-extension-to-mime
(match-string 0 url)))
"application/octet-stream")
(format " url=\"http://www.mail-archive.com/%s/%s\""
group url)
">\n"
"<#/external>")
(setq mime t))
(t
(setq p (point))
(insert "<#part type=\"text/html\" disposition=inline>")
(goto-char
(if (re-search-forward
"[\040\n\r\t]*<PRE>\\|[\040\n\r\t]*<P><A HREF=\""
nil t)
(match-beginning 0)
(point-max)))
(insert "<#/part>")
(setq mime t)))
(setq p (point))
(if (> (skip-chars-forward "\040\n\r\t") 0)
(delete-region p (point))))
(goto-char (point-max))))
(setq p (point))
(when (search-forward "X-References-End" nil t)
(setq e (point))
(beginning-of-line)
(search-backward "X-References" p t)
(while (re-search-forward "msg\\([0-9]+\\)\\.html" e t)
(push (concat "<" (match-string 1) "%" group ">") refs)))
(delete-region p (point-max))
(goto-char (point-min))
(insert (format "Message-ID: <%05d%%%s>\n" (1- article) group))
(when refs
(insert "References:")
(while refs
(insert " " (pop refs)))
(insert "\n"))
(when mime
(unless (looking-at "$")
(search-forward "\n\n" nil t)
(forward-line -1))
(narrow-to-region (point) (point-max))
(insert "MIME-Version: 1.0\n"
(prog1
(mml-generate-mime)
(delete-region (point-min) (point-max))))
(widen)))
(buffer-string)))
(provide 'nnwarchive)
;; arch-tag: 1ab7a15c-777a-40e0-95c0-0c41b3963578
;;; nnwarchive.el ends here