1;;; gnus-agent.el --- Legacy unplugged support for Gnus 2 3;; Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc. 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 12;; the Free Software Foundation; either version 2, or (at your option) 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: 30(require 'gnus-start) 31(require 'gnus-util) 32(require 'gnus-range) 33(require 'gnus-agent) 34 35;; Oort Gnus v0.08 - This release updated agent to no longer use 36;; history file and to support a compressed alist. 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 42converted 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") 57 (setq converted-something 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) 113 (let ((compressed nil)) 114 (mapcar (lambda (pair) 115 (let* ((article-id (car pair)) 116 (day-of-download (cdr pair)) 117 (comp-list (assq day-of-download compressed))) 118 (if comp-list 119 (setcdr comp-list 120 (cons article-id (cdr comp-list))) 121 (setq compressed 122 (cons (list day-of-download article-id) 123 compressed))) 124 nil)) alist) 125 (mapcar (lambda (comp-list) 126 (setcdr comp-list 127 (gnus-compress-sequence 128 (nreverse (cdr comp-list))))) 129 compressed) 130 (princ compressed (current-buffer))) 131 (insert "\n2\n") 132 (write-file file) 133 (when history-file 134 (delete-file history-file)) 135 t)))) 136 137;; End of Oort Gnus v0.08 updates 138 139;; No Gnus v0.3 - This release provides a mechanism for upgrading gnus 140;; from previous versions. Therefore, the previous 141;; hacks to handle a gnus-agent-expire-days that 142;; specifies a list of values can be removed. 143 144(defun gnus-agent-unlist-expire-days (converting-to) 145 (when (listp gnus-agent-expire-days) 146 (let (buffer) 147 (unwind-protect 148 (save-window-excursion 149 (setq buffer (gnus-get-buffer-create " *Gnus agent upgrade*")) 150 (set-buffer buffer) 151 (erase-buffer) 152 (insert "The definition of gnus-agent-expire-days has been changed.\nYou currently have it set to the list:\n ") 153 (gnus-pp gnus-agent-expire-days) 154 155 (insert "\nIn order to use version '" converting-to "' of gnus, you will need to set\n") 156 (insert "gnus-agent-expire-days to an integer. If you still wish to set different\n") 157 (insert "expiration days to individual groups, you must instead set the\n") 158 (insert "'agent-days-until-old group and/or topic parameter.\n") 159 (insert "\n") 160 (insert "If you would like, gnus can iterate over every group comparing its name to the\n") 161 (insert "regular expressions that you currently have in gnus-agent-expire-days. When\n") 162 (insert "gnus finds a match, it will update that group's 'agent-days-until-old group\n") 163 (insert "parameter to the value associated with the regular expression.\n") 164 (insert "\n") 165 (insert "Whether gnus assigns group parameters, or not, gnus will terminate with an\n") 166 (insert "ERROR as soon as this function completes. The reason is that you must\n") 167 (insert "manually edit your configuration to either not set gnus-agent-expire-days or\n") 168 (insert "to set it to an integer before gnus can be used.\n") 169 (insert "\n") 170 (insert "Once you have successfully edited gnus-agent-expire-days, gnus will be able to\n") 171 (insert "execute past this function.\n") 172 (insert "\n") 173 (insert "Should gnus use gnus-agent-expire-days to assign\n") 174 (insert "agent-days-until-old parameters to individual groups? (Y/N)") 175 176 (switch-to-buffer buffer) 177 (beep) 178 (beep) 179 180 (let ((echo-keystrokes 0) 181 c) 182 (while (progn (setq c (read-char-exclusive)) 183 (cond ((or (eq c ?y) (eq c ?Y)) 184 (save-excursion 185 (let ((groups (gnus-group-listed-groups))) 186 (while groups 187 (let* ((group (pop groups)) 188 (days gnus-agent-expire-days) 189 (day (catch 'found 190 (while days 191 (when (eq 0 (string-match 192 (caar days) 193 group)) 194 (throw 'found (cadar days))) 195 (setq days (cdr days))) 196 nil))) 197 (when day 198 (gnus-group-set-parameter group 'agent-days-until-old 199 day)))))) 200 nil 201 ) 202 ((or (eq c ?n) (eq c ?N)) 203 nil) 204 (t 205 t)))))) 206 (kill-buffer buffer)) 207 (error "Change gnus-agent-expire-days to an integer for gnus to start")))) 208 209;; The gnus-agent-unlist-expire-days has its own conversion prompt. 210;; Therefore, hide the default prompt. 211(gnus-convert-mark-converter-prompt 'gnus-agent-unlist-expire-days t) 212 213(defun gnus-agent-unhook-expire-days (converting-to) 214 "Remove every lambda from gnus-group-prepare-hook that mention the 215symbol gnus-agent-do-once in their definition. This should NOT be 216necessary as gnus-agent.el no longer adds them. However, it is 217possible that the hook was persistently saved." 218 (let ((h t)) ; iterate from bgn of hook 219 (while h 220 (let ((func (progn (when (eq h t) 221 ;; init h to list of functions 222 (setq h (cond ((listp gnus-group-prepare-hook) 223 gnus-group-prepare-hook) 224 ((boundp 'gnus-group-prepare-hook) 225 (list gnus-group-prepare-hook))))) 226 (pop h)))) 227 228 (when (cond ((eq (type-of func) 'compiled-function) 229 ;; Search def. of compiled function for gnus-agent-do-once string 230 (let* (definition 231 print-level 232 print-length 233 (standard-output 234 (lambda (char) 235 (setq definition (cons char definition))))) 236 (princ func) ; populates definition with reversed list of characters 237 (let* ((i (length definition)) 238 (s (make-string i 0))) 239 (while definition 240 (aset s (setq i (1- i)) (pop definition))) 241 242 (string-match "\\bgnus-agent-do-once\\b" s)))) 243 ((listp func) 244 (eq (cadr (nth 2 func)) 'gnus-agent-do-once) ; handles eval'd lambda 245 )) 246 247 (remove-hook 'gnus-group-prepare-hook func) 248 ;; I don't what remove-hook is going to actually do to the 249 ;; hook list so start over from the beginning. 250 (setq h t)))))) 251 252;; gnus-agent-unhook-expire-days is safe in that it does not modify 253;; the .newsrc.eld file. 254(gnus-convert-mark-converter-prompt 'gnus-agent-unhook-expire-days t) 255 256(provide 'legacy-gnus-agent) 257 258;; arch-tag: 845c7b8a-88f7-4468-b8d7-94e8fc72cf1a 259;;; legacy-gnus-agent.el ends here 260