cgit.sxemacs.org Git - gnus/blob - lisp/legacy-gnus-agent.el

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