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257 lines
11 KiB
EmacsLisp
257 lines
11 KiB
EmacsLisp
;;; gnus-agent.el --- Legacy unplugged support for Gnus
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;; Copyright (C) 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
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;; Author: Kevin Greiner <kgreiner@xpediantsolutions.com>
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;; Keywords: news
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 3, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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;; Boston, MA 02110-1301, USA.
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;;; Commentary:
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;; Conversion functions for the Agent.
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;;; Code:
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(require 'gnus-start)
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(require 'gnus-util)
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(require 'gnus-range)
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(require 'gnus-agent)
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;; Oort Gnus v0.08 - This release updated agent to no longer use
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;; history file and to support a compressed alist.
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(defvar gnus-agent-compressed-agentview-search-only nil)
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(defun gnus-agent-convert-to-compressed-agentview (converting-to)
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"Iterates over all agentview files to ensure that they have been
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converted to the compressed format."
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(let ((search-in (list gnus-agent-directory))
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here
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members
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member
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converted-something)
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(while (setq here (pop search-in))
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(setq members (directory-files here t))
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(while (setq member (pop members))
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(cond ((string-match "/\\.\\.?$" member)
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nil)
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((file-directory-p member)
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(push member search-in))
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((equal (file-name-nondirectory member) ".agentview")
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(setq converted-something
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(or (gnus-agent-convert-agentview member)
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converted-something))))))
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(if converted-something
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(gnus-message 4 "Successfully converted Gnus %s offline (agent) files to %s" gnus-newsrc-file-version converting-to))))
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(defun gnus-agent-convert-to-compressed-agentview-prompt ()
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(catch 'found-file-to-convert
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(let ((gnus-agent-compressed-agentview-search-only t))
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(gnus-agent-convert-to-compressed-agentview nil))))
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(gnus-convert-mark-converter-prompt 'gnus-agent-convert-to-compressed-agentview 'gnus-agent-convert-to-compressed-agentview-prompt)
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(defun gnus-agent-convert-agentview (file)
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"Load FILE and do a `read' there."
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(with-temp-buffer
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(nnheader-insert-file-contents file)
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(goto-char (point-min))
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(let ((inhibit-quit t)
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(alist (read (current-buffer)))
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(version (condition-case nil (read (current-buffer))
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(end-of-file 0)))
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changed-version
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history-file)
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(cond
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((= version 0)
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(let (entry
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(gnus-command-method nil))
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(mm-disable-multibyte) ;; everything is binary
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(erase-buffer)
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(insert "\n")
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(let ((file (concat (file-name-directory file) "/history")))
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(when (file-exists-p file)
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(nnheader-insert-file-contents file)
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(setq history-file file)))
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(goto-char (point-min))
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(while (not (eobp))
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(if (and (looking-at
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"[^\t\n]+\t\\([0-9]+\\)\t\\([^ \n]+\\) \\([0-9]+\\)")
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(string= (gnus-agent-article-name ".agentview" (match-string 2))
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file)
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(setq entry (assoc (string-to-number (match-string 3)) alist)))
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(setcdr entry (string-to-number (match-string 1))))
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(forward-line 1))
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(setq changed-version t)))
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((= version 1)
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(setq changed-version t)))
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(when changed-version
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(when gnus-agent-compressed-agentview-search-only
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(throw 'found-file-to-convert t))
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(erase-buffer)
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(let (article-id day-of-download comp-list compressed)
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(while alist
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(setq article-id (caar alist)
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day-of-download (cdar alist)
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comp-list (assq day-of-download compressed)
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alist (cdr alist))
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(if comp-list
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(setcdr comp-list (cons article-id (cdr comp-list)))
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(push (list day-of-download article-id) compressed)))
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(setq alist compressed)
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(while alist
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(setq comp-list (pop alist))
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(setcdr comp-list
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(gnus-compress-sequence (nreverse (cdr comp-list)))))
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(princ compressed (current-buffer)))
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(insert "\n2\n")
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(write-file file)
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(when history-file
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(delete-file history-file))
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t))))
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;; End of Oort Gnus v0.08 updates
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;; No Gnus v0.3 - This release provides a mechanism for upgrading gnus
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;; from previous versions. Therefore, the previous
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;; hacks to handle a gnus-agent-expire-days that
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;; specifies a list of values can be removed.
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(defun gnus-agent-unlist-expire-days (converting-to)
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(when (listp gnus-agent-expire-days)
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(let (buffer)
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(unwind-protect
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(save-window-excursion
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(setq buffer (gnus-get-buffer-create " *Gnus agent upgrade*"))
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(set-buffer buffer)
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(erase-buffer)
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(insert "The definition of gnus-agent-expire-days has been changed.\nYou currently have it set to the list:\n ")
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(gnus-pp gnus-agent-expire-days)
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(insert "\nIn order to use version '" converting-to "' of gnus, you will need to set\n")
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(insert "gnus-agent-expire-days to an integer. If you still wish to set different\n")
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(insert "expiration days to individual groups, you must instead set the\n")
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(insert "'agent-days-until-old group and/or topic parameter.\n")
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(insert "\n")
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(insert "If you would like, gnus can iterate over every group comparing its name to the\n")
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(insert "regular expressions that you currently have in gnus-agent-expire-days. When\n")
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(insert "gnus finds a match, it will update that group's 'agent-days-until-old group\n")
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(insert "parameter to the value associated with the regular expression.\n")
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(insert "\n")
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(insert "Whether gnus assigns group parameters, or not, gnus will terminate with an\n")
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(insert "ERROR as soon as this function completes. The reason is that you must\n")
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(insert "manually edit your configuration to either not set gnus-agent-expire-days or\n")
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(insert "to set it to an integer before gnus can be used.\n")
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(insert "\n")
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(insert "Once you have successfully edited gnus-agent-expire-days, gnus will be able to\n")
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(insert "execute past this function.\n")
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(insert "\n")
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(insert "Should gnus use gnus-agent-expire-days to assign\n")
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(insert "agent-days-until-old parameters to individual groups? (Y/N)")
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(switch-to-buffer buffer)
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(beep)
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(beep)
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(let ((echo-keystrokes 0)
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c)
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(while (progn (setq c (read-char-exclusive))
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(cond ((or (eq c ?y) (eq c ?Y))
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(save-excursion
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(let ((groups (gnus-group-listed-groups)))
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(while groups
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(let* ((group (pop groups))
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(days gnus-agent-expire-days)
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(day (catch 'found
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(while days
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(when (eq 0 (string-match
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(caar days)
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group))
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(throw 'found (cadar days)))
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(setq days (cdr days)))
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nil)))
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(when day
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(gnus-group-set-parameter group 'agent-days-until-old
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day))))))
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nil
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)
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((or (eq c ?n) (eq c ?N))
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nil)
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(t
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t))))))
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(kill-buffer buffer))
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(error "Change gnus-agent-expire-days to an integer for gnus to start"))))
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;; The gnus-agent-unlist-expire-days has its own conversion prompt.
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;; Therefore, hide the default prompt.
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(gnus-convert-mark-converter-prompt 'gnus-agent-unlist-expire-days t)
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(defun gnus-agent-unhook-expire-days (converting-to)
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"Remove every lambda from gnus-group-prepare-hook that mention the
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symbol gnus-agent-do-once in their definition. This should NOT be
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necessary as gnus-agent.el no longer adds them. However, it is
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possible that the hook was persistently saved."
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(let ((h t)) ; iterate from bgn of hook
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(while h
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(let ((func (progn (when (eq h t)
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;; init h to list of functions
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(setq h (cond ((listp gnus-group-prepare-hook)
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gnus-group-prepare-hook)
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((boundp 'gnus-group-prepare-hook)
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(list gnus-group-prepare-hook)))))
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(pop h))))
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(when (cond ((eq (type-of func) 'compiled-function)
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;; Search def. of compiled function for gnus-agent-do-once string
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(let* (definition
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print-level
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print-length
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(standard-output
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(lambda (char)
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(setq definition (cons char definition)))))
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(princ func) ; populates definition with reversed list of characters
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(let* ((i (length definition))
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(s (make-string i 0)))
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(while definition
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(aset s (setq i (1- i)) (pop definition)))
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(string-match "\\bgnus-agent-do-once\\b" s))))
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((listp func)
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(eq (cadr (nth 2 func)) 'gnus-agent-do-once) ; handles eval'd lambda
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))
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(remove-hook 'gnus-group-prepare-hook func)
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;; I don't what remove-hook is going to actually do to the
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;; hook list so start over from the beginning.
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(setq h t))))))
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;; gnus-agent-unhook-expire-days is safe in that it does not modify
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;; the .newsrc.eld file.
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(gnus-convert-mark-converter-prompt 'gnus-agent-unhook-expire-days t)
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(provide 'legacy-gnus-agent)
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;; arch-tag: 845c7b8a-88f7-4468-b8d7-94e8fc72cf1a
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;;; legacy-gnus-agent.el ends here
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