1 ;;; gnus-move.el --- commands for moving Gnus from one server to another
3 ;; Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
4 ;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
6 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software: you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation, either version 3 of the License, or
14 ;; (at your option) any later version.
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
28 (eval-when-compile (require 'cl))
36 ;;; Moving by comparing Message-ID's.
40 (defun gnus-change-server (from-server to-server)
41 "Move from FROM-SERVER to TO-SERVER.
42 Update the .newsrc.eld file to reflect the change of nntp server."
44 (list gnus-select-method (gnus-read-method "Move to method: ")))
47 (let ((gnus-activate-level 0)
52 ;; Go through all groups and translate.
53 (let ((nntp-nov-gap nil))
54 (dolist (info gnus-newsrc-alist)
55 (when (gnus-group-native-p (gnus-info-group info))
56 (gnus-move-group-to-server info from-server to-server))))))
58 (defun gnus-move-group-to-server (info from-server to-server)
59 "Move group INFO from FROM-SERVER to TO-SERVER."
60 (let ((group (gnus-info-group info))
61 to-active hashtb type mark marks
62 to-article to-reads to-marks article
64 (gnus-message 7 "Translating %s..." group)
65 (when (gnus-request-group group nil to-server)
66 (setq to-active (gnus-parse-active)
67 hashtb (gnus-make-hashtable 1024)
68 act-articles (gnus-uncompress-range to-active))
69 ;; Fetch the headers from the `to-server'.
72 (setq type (gnus-retrieve-headers
75 ;; Convert HEAD headers. I don't care.
76 (when (eq type 'headers)
77 (nnvirtual-convert-headers))
78 ;; Create a mapping from Message-ID to article number.
79 (set-buffer nntp-server-buffer)
80 (goto-char (point-min))
82 "^[0-9]+\t[^\t]*\t[^\t]*\t[^\t]*\t\\([^\t]*\\)\t")
84 (buffer-substring (match-beginning 1) (match-end 1))
85 (read (current-buffer))
88 ;; Then we read the headers from the `from-server'.
89 (when (and (gnus-request-group group nil from-server)
91 (gnus-uncompress-range
93 (setq type (gnus-retrieve-headers
94 (gnus-uncompress-range
97 ;; Make it easier to map marks.
98 (let ((mark-lists (gnus-info-marks info))
101 (setq type (caar mark-lists)
102 ms (gnus-uncompress-range (cdr (pop mark-lists))))
104 (if (setq m (assq (car ms) marks))
105 (setcdr m (cons type (cdr m)))
106 (push (list (car ms) type) marks))
109 (when (eq type 'headers)
110 (nnvirtual-convert-headers))
111 ;; Go through the headers and map away.
112 (set-buffer nntp-server-buffer)
113 (goto-char (point-min))
115 "^[0-9]+\t[^\t]*\t[^\t]*\t[^\t]*\t\\([^\t]*\\)\t")
116 (when (setq to-article
118 (buffer-substring (match-beginning 1) (match-end 1))
120 ;; Add this article to the list of read articles.
121 (push to-article to-reads)
122 ;; See if there are any marks and then add them.
123 (when (setq mark (assq (read (current-buffer)) marks))
124 (setq marks (delq mark marks))
125 (setcar mark to-article)
126 (push mark to-marks))
128 ;; Now we know what the read articles are and what the
129 ;; article marks are. We transform the information
130 ;; into the Gnus info format.
133 (gnus-compress-sequence
134 (and (setq to-reads (delq nil to-reads))
137 (cons 1 (1- (car to-active)))))
138 (gnus-info-set-read info to-reads)
139 ;; Do the marks. I'm sure y'all understand what's
140 ;; going on down below, so I won't bother with any
141 ;; further comments. <duck>
142 (let ((mlists gnus-article-mark-lists)
145 (push (list (cdr (pop mlists))) lists))
146 (while (setq ms (pop marks))
147 (setq article (pop ms))
149 (setcdr (setq a (assq (pop ms) lists))
150 (cons article (cdr a)))))
153 (setcdr (car a) (gnus-compress-sequence
154 (and (cdar a) (sort (cdar a) '<))))
156 (gnus-info-set-marks info lists t)))))
157 (gnus-message 7 "Translating %s...done" group)))
159 (defun gnus-group-move-group-to-server (info from-server to-server)
160 "Move the group on the current line from FROM-SERVER to TO-SERVER."
162 (let ((info (gnus-get-info (gnus-group-group-name))))
163 (list info (gnus-find-method-for-group (gnus-info-group info))
164 (gnus-read-method (format "Move group %s to method: "
165 (gnus-info-group info))))))
167 (gnus-move-group-to-server info from-server to-server)
168 ;; We have to update the group info to point use the right server.
169 (gnus-info-set-method info to-server t)
170 ;; We also have to change the name of the group and stuff.
171 (let* ((group (gnus-info-group info))
172 (new-name (gnus-group-prefixed-name
173 (gnus-group-real-name group) to-server)))
174 (gnus-info-set-group info new-name)
175 (gnus-sethash new-name (gnus-group-entry group) gnus-newsrc-hashtb)
176 (gnus-sethash group nil gnus-newsrc-hashtb))))
180 ;; arch-tag: 503742b8-7d66-4d79-bb31-4a698070707b
181 ;;; gnus-move.el ends here