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1 | ;;; gnus-agent.el --- Legacy unplugged support for Gnus |
2 | ||
d7a0267c | 3 | ;; Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
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4 | |
5 | ;; Author: Kevin Greiner <kgreiner@xpediantsolutions.com> | |
6 | ;; Keywords: news | |
7 | ||
8 | ;; This file is part of GNU Emacs. | |
9 | ||
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 | |
5a9dffec | 12 | ;; the Free Software Foundation; either version 3, or (at your option) |
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13 | ;; any later version. |
14 | ||
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. | |
19 | ||
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 the | |
22 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | |
23 | ;; Boston, MA 02110-1301, USA. | |
24 | ||
25 | ;;; Commentary: | |
26 | ||
27 | ;; Conversion functions for the Agent. | |
28 | ||
29 | ;;; Code: | |
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30 | (require 'gnus-start) |
31 | (require 'gnus-util) | |
32 | (require 'gnus-range) | |
33 | (require 'gnus-agent) | |
34 | ||
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35 | ;; Oort Gnus v0.08 - This release updated agent to no longer use |
36 | ;; history file and to support a compressed alist. | |
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37 | |
38 | (defvar gnus-agent-compressed-agentview-search-only nil) | |
39 | ||
40 | (defun gnus-agent-convert-to-compressed-agentview (converting-to) | |
41 | "Iterates over all agentview files to ensure that they have been | |
42 | converted to the compressed format." | |
43 | ||
44 | (let ((search-in (list gnus-agent-directory)) | |
45 | here | |
46 | members | |
47 | member | |
48 | converted-something) | |
49 | (while (setq here (pop search-in)) | |
50 | (setq members (directory-files here t)) | |
51 | (while (setq member (pop members)) | |
52 | (cond ((string-match "/\\.\\.?$" member) | |
53 | nil) | |
54 | ((file-directory-p member) | |
55 | (push member search-in)) | |
56 | ((equal (file-name-nondirectory member) ".agentview") | |
401d9d1a | 57 | (setq converted-something |
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58 | (or (gnus-agent-convert-agentview member) |
59 | converted-something)))))) | |
60 | ||
61 | (if converted-something | |
62 | (gnus-message 4 "Successfully converted Gnus %s offline (agent) files to %s" gnus-newsrc-file-version converting-to)))) | |
63 | ||
64 | (defun gnus-agent-convert-to-compressed-agentview-prompt () | |
65 | (catch 'found-file-to-convert | |
66 | (let ((gnus-agent-compressed-agentview-search-only t)) | |
67 | (gnus-agent-convert-to-compressed-agentview nil)))) | |
68 | ||
69 | (gnus-convert-mark-converter-prompt 'gnus-agent-convert-to-compressed-agentview 'gnus-agent-convert-to-compressed-agentview-prompt) | |
70 | ||
71 | (defun gnus-agent-convert-agentview (file) | |
72 | "Load FILE and do a `read' there." | |
73 | (with-temp-buffer | |
74 | (nnheader-insert-file-contents file) | |
75 | (goto-char (point-min)) | |
76 | (let ((inhibit-quit t) | |
77 | (alist (read (current-buffer))) | |
78 | (version (condition-case nil (read (current-buffer)) | |
79 | (end-of-file 0))) | |
80 | changed-version | |
81 | history-file) | |
82 | ||
83 | (cond | |
84 | ((= version 0) | |
85 | (let (entry | |
86 | (gnus-command-method nil)) | |
87 | (mm-disable-multibyte) ;; everything is binary | |
88 | (erase-buffer) | |
89 | (insert "\n") | |
90 | (let ((file (concat (file-name-directory file) "/history"))) | |
91 | (when (file-exists-p file) | |
92 | (nnheader-insert-file-contents file) | |
93 | (setq history-file file))) | |
94 | ||
95 | (goto-char (point-min)) | |
96 | (while (not (eobp)) | |
97 | (if (and (looking-at | |
98 | "[^\t\n]+\t\\([0-9]+\\)\t\\([^ \n]+\\) \\([0-9]+\\)") | |
99 | (string= (gnus-agent-article-name ".agentview" (match-string 2)) | |
100 | file) | |
101 | (setq entry (assoc (string-to-number (match-string 3)) alist))) | |
102 | (setcdr entry (string-to-number (match-string 1)))) | |
103 | (forward-line 1)) | |
104 | (setq changed-version t))) | |
105 | ((= version 1) | |
106 | (setq changed-version t))) | |
107 | ||
108 | (when changed-version | |
109 | (when gnus-agent-compressed-agentview-search-only | |
110 | (throw 'found-file-to-convert t)) | |
111 | ||
112 | (erase-buffer) | |
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113 | (let (article-id day-of-download comp-list compressed) |
114 | (while alist | |
115 | (setq article-id (caar alist) | |
116 | day-of-download (cdar alist) | |
117 | comp-list (assq day-of-download compressed) | |
118 | alist (cdr alist)) | |
119 | (if comp-list | |
120 | (setcdr comp-list (cons article-id (cdr comp-list))) | |
121 | (push (list day-of-download article-id) compressed))) | |
122 | (setq alist compressed) | |
123 | (while alist | |
124 | (setq comp-list (pop alist)) | |
125 | (setcdr comp-list | |
126 | (gnus-compress-sequence (nreverse (cdr comp-list))))) | |
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127 | (princ compressed (current-buffer))) |
128 | (insert "\n2\n") | |
129 | (write-file file) | |
130 | (when history-file | |
131 | (delete-file history-file)) | |
132 | t)))) | |
133 | ||
134 | ;; End of Oort Gnus v0.08 updates | |
135 | ||
136 | ;; No Gnus v0.3 - This release provides a mechanism for upgrading gnus | |
137 | ;; from previous versions. Therefore, the previous | |
138 | ;; hacks to handle a gnus-agent-expire-days that | |
139 | ;; specifies a list of values can be removed. | |
140 | ||
141 | (defun gnus-agent-unlist-expire-days (converting-to) | |
142 | (when (listp gnus-agent-expire-days) | |
143 | (let (buffer) | |
144 | (unwind-protect | |
145 | (save-window-excursion | |
146 | (setq buffer (gnus-get-buffer-create " *Gnus agent upgrade*")) | |
147 | (set-buffer buffer) | |
148 | (erase-buffer) | |
149 | (insert "The definition of gnus-agent-expire-days has been changed.\nYou currently have it set to the list:\n ") | |
150 | (gnus-pp gnus-agent-expire-days) | |
151 | ||
152 | (insert "\nIn order to use version '" converting-to "' of gnus, you will need to set\n") | |
153 | (insert "gnus-agent-expire-days to an integer. If you still wish to set different\n") | |
154 | (insert "expiration days to individual groups, you must instead set the\n") | |
155 | (insert "'agent-days-until-old group and/or topic parameter.\n") | |
156 | (insert "\n") | |
157 | (insert "If you would like, gnus can iterate over every group comparing its name to the\n") | |
158 | (insert "regular expressions that you currently have in gnus-agent-expire-days. When\n") | |
159 | (insert "gnus finds a match, it will update that group's 'agent-days-until-old group\n") | |
160 | (insert "parameter to the value associated with the regular expression.\n") | |
161 | (insert "\n") | |
162 | (insert "Whether gnus assigns group parameters, or not, gnus will terminate with an\n") | |
163 | (insert "ERROR as soon as this function completes. The reason is that you must\n") | |
164 | (insert "manually edit your configuration to either not set gnus-agent-expire-days or\n") | |
165 | (insert "to set it to an integer before gnus can be used.\n") | |
166 | (insert "\n") | |
167 | (insert "Once you have successfully edited gnus-agent-expire-days, gnus will be able to\n") | |
168 | (insert "execute past this function.\n") | |
169 | (insert "\n") | |
170 | (insert "Should gnus use gnus-agent-expire-days to assign\n") | |
171 | (insert "agent-days-until-old parameters to individual groups? (Y/N)") | |
172 | ||
173 | (switch-to-buffer buffer) | |
174 | (beep) | |
175 | (beep) | |
176 | ||
177 | (let ((echo-keystrokes 0) | |
178 | c) | |
179 | (while (progn (setq c (read-char-exclusive)) | |
180 | (cond ((or (eq c ?y) (eq c ?Y)) | |
181 | (save-excursion | |
182 | (let ((groups (gnus-group-listed-groups))) | |
183 | (while groups | |
184 | (let* ((group (pop groups)) | |
185 | (days gnus-agent-expire-days) | |
186 | (day (catch 'found | |
187 | (while days | |
188 | (when (eq 0 (string-match | |
189 | (caar days) | |
190 | group)) | |
191 | (throw 'found (cadar days))) | |
192 | (setq days (cdr days))) | |
193 | nil))) | |
194 | (when day | |
195 | (gnus-group-set-parameter group 'agent-days-until-old | |
196 | day)))))) | |
197 | nil | |
198 | ) | |
199 | ((or (eq c ?n) (eq c ?N)) | |
200 | nil) | |
201 | (t | |
202 | t)))))) | |
203 | (kill-buffer buffer)) | |
401d9d1a | 204 | (error "Change gnus-agent-expire-days to an integer for gnus to start")))) |
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205 | |
206 | ;; The gnus-agent-unlist-expire-days has its own conversion prompt. | |
207 | ;; Therefore, hide the default prompt. | |
208 | (gnus-convert-mark-converter-prompt 'gnus-agent-unlist-expire-days t) | |
209 | ||
210 | (defun gnus-agent-unhook-expire-days (converting-to) | |
211 | "Remove every lambda from gnus-group-prepare-hook that mention the | |
212 | symbol gnus-agent-do-once in their definition. This should NOT be | |
213 | necessary as gnus-agent.el no longer adds them. However, it is | |
214 | possible that the hook was persistently saved." | |
215 | (let ((h t)) ; iterate from bgn of hook | |
216 | (while h | |
217 | (let ((func (progn (when (eq h t) | |
218 | ;; init h to list of functions | |
219 | (setq h (cond ((listp gnus-group-prepare-hook) | |
220 | gnus-group-prepare-hook) | |
221 | ((boundp 'gnus-group-prepare-hook) | |
222 | (list gnus-group-prepare-hook))))) | |
223 | (pop h)))) | |
224 | ||
225 | (when (cond ((eq (type-of func) 'compiled-function) | |
226 | ;; Search def. of compiled function for gnus-agent-do-once string | |
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227 | (let* (definition |
228 | print-level | |
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229 | print-length |
230 | (standard-output | |
231 | (lambda (char) | |
232 | (setq definition (cons char definition))))) | |
233 | (princ func) ; populates definition with reversed list of characters | |
234 | (let* ((i (length definition)) | |
235 | (s (make-string i 0))) | |
236 | (while definition | |
237 | (aset s (setq i (1- i)) (pop definition))) | |
238 | ||
239 | (string-match "\\bgnus-agent-do-once\\b" s)))) | |
240 | ((listp func) | |
241 | (eq (cadr (nth 2 func)) 'gnus-agent-do-once) ; handles eval'd lambda | |
242 | )) | |
243 | ||
244 | (remove-hook 'gnus-group-prepare-hook func) | |
245 | ;; I don't what remove-hook is going to actually do to the | |
246 | ;; hook list so start over from the beginning. | |
247 | (setq h t)))))) | |
248 | ||
249 | ;; gnus-agent-unhook-expire-days is safe in that it does not modify | |
250 | ;; the .newsrc.eld file. | |
251 | (gnus-convert-mark-converter-prompt 'gnus-agent-unhook-expire-days t) | |
252 | ||
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253 | (provide 'legacy-gnus-agent) |
254 | ||
255 | ;; arch-tag: 845c7b8a-88f7-4468-b8d7-94e8fc72cf1a | |
256 | ;;; legacy-gnus-agent.el ends here |