* gnus-art.el (gnus-mime-delete-part): Error message when no MIME
[gnus] / lisp / gnus-agent.el
index a565146..2366306 100644 (file)
@@ -113,7 +113,7 @@ If nil, only read articles will be expired."
   :group 'gnus-agent
   :type 'function)
 
-(defcustom gnus-agent-synchronize-flags 'ask
+(defcustom gnus-agent-synchronize-flags nil
   "Indicate if flags are synchronized when you plug in.
 If this is `ask' the hook will query the user."
   :version "21.1"
@@ -229,7 +229,9 @@ NOTES:
 (defvar gnus-agent-send-mail-function nil)
 (defvar gnus-agent-file-coding-system 'raw-text)
 (defvar gnus-agent-file-loading-cache nil)
-(defvar gnus-agent-file-header-cache nil)
+(defvar gnus-agent-total-fetched-hashtb nil)
+(defvar gnus-agent-inhibit-update-total-fetched-for nil)
+(defvar gnus-agent-need-update-total-fetched-for nil)
 
 ;; Dynamic variables
 (defvar gnus-headers)
@@ -269,6 +271,17 @@ NOTES:
 ;;; Utility functions
 ;;;
 
+(defmacro gnus-agent-with-refreshed-group (group &rest body)
+  "Performs the body then updates the group's line in the group
+buffer.  Automatically blocks multiple updates due to recursion."
+`(prog1 (let ((gnus-agent-inhibit-update-total-fetched-for t)) ,@body)
+     (when (and gnus-agent-need-update-total-fetched-for
+               (not gnus-agent-inhibit-update-total-fetched-for))
+       (save-excursion
+         (set-buffer gnus-group-buffer)
+         (setq gnus-agent-need-update-total-fetched-for nil)
+         (gnus-group-update-group ,group t)))))
+
 (defun gnus-agent-read-file (file)
   "Load FILE and do a `read' there."
   (with-temp-buffer
@@ -622,7 +635,7 @@ minor mode in all Gnus buffers."
   (unless gnus-agent-send-mail-function
     (setq gnus-agent-send-mail-function
          (or message-send-mail-real-function
-             message-send-mail-function)
+             (function (lambda () (funcall message-send-mail-function))))
          message-send-mail-real-function 'gnus-agent-send-mail))
 
   ;; If the servers file doesn't exist, auto-agentize some servers and
@@ -817,6 +830,56 @@ be a select method."
                                        (cadr method)))))
     (gnus-agent-synchronize-flags-server method)))
 
+;;;###autoload
+(defun gnus-agent-rename-group (old-group new-group)
+  "Rename fully-qualified OLD-GROUP as NEW-GROUP.  Always updates the agent, even when
+disabled, as the old agent files would corrupt gnus when the agent was
+next enabled. Depends upon the caller to determine whether group renaming is supported."
+  (let* ((old-command-method (gnus-find-method-for-group old-group))
+        (old-path           (directory-file-name
+                             (let (gnus-command-method old-command-method)
+                               (gnus-agent-group-pathname old-group))))
+        (new-command-method (gnus-find-method-for-group new-group))
+        (new-path           (directory-file-name
+                             (let (gnus-command-method new-command-method)
+                               (gnus-agent-group-pathname new-group)))))
+    (gnus-rename-file old-path new-path t)
+
+    (let* ((old-real-group (gnus-group-real-name old-group))
+          (new-real-group (gnus-group-real-name new-group))
+          (old-active (gnus-agent-get-group-info old-command-method old-real-group)))
+      (gnus-agent-save-group-info old-command-method old-real-group nil)
+      (gnus-agent-save-group-info new-command-method new-real-group old-active)
+
+      (let ((old-local (gnus-agent-get-local old-group 
+                                            old-real-group old-command-method)))
+       (gnus-agent-set-local old-group
+                             nil nil
+                             old-real-group old-command-method)
+       (gnus-agent-set-local new-group
+                             (car old-local) (cdr old-local)
+                             new-real-group new-command-method)))))
+
+;;;###autoload
+(defun gnus-agent-delete-group (group)
+  "Delete fully-qualified GROUP.  Always updates the agent, even when
+disabled, as the old agent files would corrupt gnus when the agent was
+next enabled. Depends upon the caller to determine whether group deletion is supported."
+  (let* ((command-method (gnus-find-method-for-group group))
+        (path           (directory-file-name
+                         (let (gnus-command-method command-method)
+                           (gnus-agent-group-pathname group)))))
+    (gnus-delete-file path)
+
+    (let* ((real-group (gnus-group-real-name group)))
+      (gnus-agent-save-group-info command-method real-group nil)
+
+      (let ((local (gnus-agent-get-local group 
+                                        real-group command-method)))
+       (gnus-agent-set-local group
+                             nil nil
+                             real-group command-method)))))
+
 ;;;
 ;;; Server mode commands
 ;;;
@@ -1135,8 +1198,8 @@ downloaded into the agent."
                                   (gnus-find-method-for-group group))))
     (when (gnus-agent-method-p gnus-command-method)
       (let* ((local (gnus-agent-get-local group))
-             (active-min (car active))
-             (active-max (cdr active))
+             (active-min (or (car active) 0))
+             (active-max (or (cdr active) 0))
              (agent-min (or (car local) active-min))
              (agent-max (or (cdr local) active-max)))
 
@@ -1180,7 +1243,7 @@ downloaded into the agent."
 (defun gnus-agent-save-group-info (method group active)
   "Update a single group's active range in the agent's copy of the server's active file."
   (when (gnus-agent-method-p method)
-    (let* ((gnus-command-method method)
+    (let* ((gnus-command-method (or method gnus-command-method))
           (coding-system-for-write nnheader-file-coding-system)
           (file-name-coding-system nnmail-pathname-coding-system)
           (file (gnus-agent-lib-file "active"))
@@ -1196,15 +1259,39 @@ downloaded into the agent."
           (when (re-search-forward
                  (concat "^" (regexp-quote group) " ") nil t)
             (save-excursion
-              (setq oactive-max (read (current-buffer)) ;; max
+              (setq oactive-max (read (current-buffer))        ;; max
                     oactive-min (read (current-buffer)))) ;; min
             (gnus-delete-line)))
-       (insert (format "%S %d %d y\n" (intern group)
-                       (max (or oactive-max (cdr active)) (cdr active))
-                        (min (or oactive-min (car active)) (car active))))
-       (goto-char (point-max))
-       (while (search-backward "\\." nil t)
-         (delete-char 1))))))
+       (when active
+         (insert (format "%S %d %d y\n" (intern group)
+                         (max (or oactive-max (cdr active)) (cdr active))
+                         (min (or oactive-min (car active)) (car active))))
+         (goto-char (point-max))
+         (while (search-backward "\\." nil t)
+           (delete-char 1)))))))
+
+(defun gnus-agent-get-group-info (method group)
+  "Get a single group's active range in the agent's copy of the server's active file."
+  (when (gnus-agent-method-p method)
+    (let* ((gnus-command-method (or method gnus-command-method))
+          (coding-system-for-write nnheader-file-coding-system)
+          (file-name-coding-system nnmail-pathname-coding-system)
+          (file (gnus-agent-lib-file "active"))
+          oactive-min oactive-max)
+      (gnus-make-directory (file-name-directory file))
+      (with-temp-buffer
+       ;; Emacs got problem to match non-ASCII group in multibyte buffer.
+       (mm-disable-multibyte)
+       (when (file-exists-p file)
+         (nnheader-insert-file-contents file)
+
+          (goto-char (point-min))
+          (when (re-search-forward
+                 (concat "^" (regexp-quote group) " ") nil t)
+            (save-excursion
+              (setq oactive-max (read (current-buffer))        ;; max
+                    oactive-min (read (current-buffer))) ;; min
+             (cons oactive-min oactive-max))))))))
 
 (defun gnus-agent-group-path (group)
   "Translate GROUP into a file name."
@@ -1407,6 +1494,8 @@ downloaded into the agent."
                     (setq pos (cdr pos)))))
 
             (gnus-agent-save-alist group (cdr fetched-articles) date)
+           (gnus-agent-update-files-total-fetched-for group (cdr fetched-articles))
+
             (gnus-message 7 ""))
           (cdr fetched-articles))))))
 
@@ -1620,12 +1709,13 @@ article numbers will be returned."
               ;; of FILE.
               (copy-to-buffer
               gnus-agent-overview-buffer (point-min) (point-max))
-              (when (file-exists-p file)
-                (gnus-agent-braid-nov group articles file))
+             (when (file-exists-p file)
+               (gnus-agent-braid-nov group articles file))
               (let ((coding-system-for-write
                      gnus-agent-file-coding-system))
                 (gnus-agent-check-overview-buffer)
                 (write-region (point-min) (point-max) file nil 'silent))
+             (gnus-agent-update-view-total-fetched-for group t)
               (gnus-agent-save-alist group articles nil)
               articles)
           (ignore-errors
@@ -1732,49 +1822,54 @@ FILE and places the combined headers into `nntp-server-buffer'."
 (defun gnus-agent-read-agentview (file)
   "Load FILE and do a `read' there."
   (with-temp-buffer
-    (ignore-errors
-      (nnheader-insert-file-contents file)
-      (goto-char (point-min))
-      (let ((alist (read (current-buffer)))
-            (version (condition-case nil (read (current-buffer))
-                       (end-of-file 0)))
-            changed-version)
-
-        (cond
-        ((= version 0)
-         (let ((inhibit-quit t)
-               entry)
-           (gnus-agent-open-history)
-           (set-buffer (gnus-agent-history-buffer))
-           (goto-char (point-min))
-           (while (not (eobp))
-             (if (and (looking-at
-                       "[^\t\n]+\t\\([0-9]+\\)\t\\([^ \n]+\\) \\([0-9]+\\)")
-                      (string= (match-string 2)
-                               gnus-agent-read-agentview)
-                      (setq entry (assoc (string-to-number (match-string 3)) alist)))
-                 (setcdr entry (string-to-number (match-string 1))))
-             (forward-line 1))
-           (gnus-agent-close-history)
-           (setq changed-version t)))
-        ((= version 1)
-         (setq changed-version (not (= 1 gnus-agent-article-alist-save-format))))
-        ((= version 2)
-         (let (uncomp)
-           (mapcar
-            (lambda (comp-list)
-              (let ((state (car comp-list))
-                    (sequence (gnus-uncompress-sequence
-                               (cdr comp-list))))
-                (mapcar (lambda (article-id)
-                          (setq uncomp (cons (cons article-id state) uncomp)))
-                        sequence)))
-            alist)
-           (setq alist (sort uncomp 'car-less-than-car)))))
-        (when changed-version
-          (let ((gnus-agent-article-alist alist))
-            (gnus-agent-save-alist gnus-agent-read-agentview)))
-        alist))))
+    (condition-case nil
+      (progn
+        (nnheader-insert-file-contents file)
+        (goto-char (point-min))
+        (let ((alist (read (current-buffer)))
+              (version (condition-case nil (read (current-buffer))
+                         (end-of-file 0)))
+              changed-version)
+
+          (cond
+           ((< version 2)
+            (error "gnus-agent-read-agentview no longer supports version %d.  Stop gnus, manually evaluate gnus-agent-convert-to-compressed-agentview, then restart gnus." version))
+           ((= version 0)
+            (let ((inhibit-quit t)
+                  entry)
+              (gnus-agent-open-history)
+              (set-buffer (gnus-agent-history-buffer))
+              (goto-char (point-min))
+              (while (not (eobp))
+                (if (and (looking-at
+                          "[^\t\n]+\t\\([0-9]+\\)\t\\([^ \n]+\\) \\([0-9]+\\)")
+                         (string= (match-string 2)
+                                  gnus-agent-read-agentview)
+                         (setq entry (assoc (string-to-number (match-string 3)) alist)))
+                    (setcdr entry (string-to-number (match-string 1))))
+                (forward-line 1))
+              (gnus-agent-close-history)
+              (setq changed-version t)))
+           ((= version 1)
+            (setq changed-version (not (= 1 gnus-agent-article-alist-save-format))))
+           ((= version 2)
+            (let (uncomp)
+              (mapcar
+               (lambda (comp-list)
+                 (let ((state (car comp-list))
+                       (sequence (inline
+                                  (gnus-uncompress-range
+                                   (cdr comp-list)))))
+                   (mapcar (lambda (article-id)
+                             (setq uncomp (cons (cons article-id state) uncomp)))
+                           sequence)))
+               alist)
+              (setq alist (sort uncomp 'car-less-than-car)))))
+          (when changed-version
+            (let ((gnus-agent-article-alist alist))
+              (gnus-agent-save-alist gnus-agent-read-agentview)))
+          alist))
+      (file-error nil))))
 
 (defun gnus-agent-save-alist (group &optional articles state)
   "Save the article-state alist for GROUP."
@@ -1825,7 +1920,9 @@ FILE and places the combined headers into `nntp-server-buffer'."
                (princ compressed (current-buffer)))))
       (insert "\n")
       (princ gnus-agent-article-alist-save-format (current-buffer))
-      (insert "\n"))))
+      (insert "\n"))
+
+    (gnus-agent-update-view-total-fetched-for group nil)))
 
 (defvar gnus-agent-article-local nil)
 (defvar gnus-agent-file-loading-local nil)
@@ -1857,7 +1954,8 @@ modified) original contents, they are first saved to their own file."
         (line 1))
     (with-temp-buffer
       (condition-case nil
-          (nnheader-insert-file-contents file)
+         (let ((nnheader-file-coding-system gnus-agent-file-coding-system))
+           (nnheader-insert-file-contents file))
         (file-error))
 
       (goto-char (point-min))
@@ -1900,31 +1998,31 @@ modified) original contents, they are first saved to their own file."
              ;; NOTE: gnus-command-method is used within gnus-agent-lib-file.
              (dest (gnus-agent-lib-file "local")))
         (gnus-make-directory (gnus-agent-lib-file ""))
-        (with-temp-file dest
-          (let ((gnus-command-method (symbol-value (intern "+method" my-obarray)))
-                (file-name-coding-system nnmail-pathname-coding-system)
-                (coding-system-for-write
-                 gnus-agent-file-coding-system)
-                print-level print-length item article
-                (standard-output (current-buffer)))
-            (mapatoms (lambda (symbol)
-                        (cond ((not (boundp symbol))
-                               nil)
-                              ((member (symbol-name symbol) '("+dirty" "+method"))
-                               nil)
-                              (t
-                               (prin1 symbol)
-                               (let ((range (symbol-value symbol)))
-                                 (princ " ")
-                                 (princ (car range))
-                                 (princ " ")
-                                 (princ (cdr range))
-                                 (princ "\n"))))) 
-                      my-obarray)))))))
-
-(defun gnus-agent-get-local (group)
-  (let* ((gmane (gnus-group-real-name group))
-         (gnus-command-method (gnus-find-method-for-group group))
+
+       (let ((buffer-file-coding-system gnus-agent-file-coding-system))
+         (with-temp-file dest
+           (let ((gnus-command-method (symbol-value (intern "+method" my-obarray)))
+                 (file-name-coding-system nnmail-pathname-coding-system)
+                 print-level print-length item article
+                 (standard-output (current-buffer)))
+             (mapatoms (lambda (symbol)
+                         (cond ((not (boundp symbol))
+                                nil)
+                               ((member (symbol-name symbol) '("+dirty" "+method"))
+                                nil)
+                               (t
+                                (prin1 symbol)
+                                (let ((range (symbol-value symbol)))
+                                  (princ " ")
+                                  (princ (car range))
+                                  (princ " ")
+                                  (princ (cdr range))
+                                  (princ "\n"))))) 
+                       my-obarray))))))))
+
+(defun gnus-agent-get-local (group &optional gmane method)
+  (let* ((gmane (or gmane (gnus-group-real-name group)))
+         (gnus-command-method (or method (gnus-find-method-for-group group)))
          (local (gnus-agent-load-local))
          (symb (intern gmane local))
          (minmax (and (boundp symb) (symbol-value symb))))
@@ -1957,9 +2055,11 @@ modified) original contents, they are first saved to their own file."
                t)
               (minmax
                nil)
-              (t
+              ((and min max)
                (set symb (cons min max))
-               t))
+               t)
+             (t
+              (unintern symb local)))
         (set (intern "+dirty" local) t))))
 
 (defun gnus-agent-article-name (article group)
@@ -2009,13 +2109,14 @@ modified) original contents, they are first saved to their own file."
                       group gnus-command-method)
                    (error
                     (unless (funcall gnus-agent-confirmation-function
-                                     (format "Error %s.  Continue? "
+                                     (format "Error %s while fetching session.  Should gnus continue? "
                                              (error-message-string err)))
                       (error "Cannot fetch articles into the Gnus agent")))
                    (quit
+                    (gnus-agent-regenerate-group group)
                     (unless (funcall gnus-agent-confirmation-function
                                      (format
-                                      "Quit fetching session %s.  Continue? "
+                                      "%s while fetching session.  Should gnus continue? "
                                       (error-message-string err)))
                       (signal 'quit
                               "Cannot fetch articles into the Gnus agent")))))))))
@@ -2700,7 +2801,7 @@ FORCE is equivalent to setting the expiration predicates to true."
   (if (not group)
       (gnus-agent-expire articles group force)
     (let ( ;; Bind gnus-agent-expire-stats to enable tracking of
-          ;; expiration statistics of this single group
+         ;; expiration statistics of this single group
           (gnus-agent-expire-stats (list 0 0 0.0)))
       (if (or (not (eq articles t))
               (yes-or-no-p
@@ -2731,330 +2832,342 @@ FORCE is equivalent to setting the expiration predicates to true."
   ;; provided a non-nil active
 
   (let ((dir (gnus-agent-group-pathname group)))
-    (when (boundp 'gnus-agent-expire-current-dirs)
-      (set 'gnus-agent-expire-current-dirs 
-           (cons dir 
-                 (symbol-value 'gnus-agent-expire-current-dirs))))
-
-    (if (and (not force)
-             (eq 'DISABLE (gnus-agent-find-parameter group 
-                                                     'agent-enable-expiration)))
-        (gnus-message 5 "Expiry skipping over %s" group)
-      (gnus-message 5 "Expiring articles in %s" group)
-      (gnus-agent-load-alist group)
-      (let* ((stats (if (boundp 'gnus-agent-expire-stats)
-                        ;; Use the list provided by my caller
-                        (symbol-value 'gnus-agent-expire-stats)
-                      ;; otherwise use my own temporary list
-                      (list 0 0 0.0)))
-             (info (gnus-get-info group))
-             (alist gnus-agent-article-alist)
-             (day (- (time-to-days (current-time))
-                     (gnus-agent-find-parameter group 'agent-days-until-old)))
-             (specials (if (and alist
-                                (not force))
-                           ;; This could be a bit of a problem.  I need to
-                           ;; keep the last article to avoid refetching
-                           ;; headers when using nntp in the backend.  At
-                           ;; the same time, if someone uses a backend
-                           ;; that supports article moving then I may have
-                           ;; to remove the last article to complete the
-                           ;; move.  Right now, I'm going to assume that
-                           ;; FORCE overrides specials.
-                           (list (caar (last alist)))))
-             (unreads ;; Articles that are excluded from the
-              ;; expiration process
-              (cond (gnus-agent-expire-all
-                     ;; All articles are marked read by global decree
-                     nil)
-                    ((eq articles t)
-                     ;; All articles are marked read by function
-                     ;; parameter
-                     nil)
-                    ((not articles)
-                     ;; Unread articles are marked protected from
-                     ;; expiration Don't call
-                     ;; gnus-list-of-unread-articles as it returns
-                     ;; articles that have not been fetched into the
-                     ;; agent.
-                     (ignore-errors
-                       (gnus-agent-unread-articles group)))
-                    (t
-                     ;; All articles EXCEPT those named by the caller
-                     ;; are protected from expiration
-                     (gnus-sorted-difference
-                      (gnus-uncompress-range
-                       (cons (caar alist)
-                             (caar (last alist))))
-                      (sort articles '<)))))
-             (marked ;; More articles that are excluded from the
-              ;; expiration process
-              (cond (gnus-agent-expire-all
-                     ;; All articles are unmarked by global decree
-                     nil)
-                    ((eq articles t)
-                     ;; All articles are unmarked by function
-                     ;; parameter
-                     nil)
-                    (articles
-                     ;; All articles may as well be unmarked as the
-                     ;; unreads list already names the articles we are
-                     ;; going to keep
-                     nil)
-                    (t
-                     ;; Ticked and/or dormant articles are excluded
-                     ;; from expiration
-                     (nconc
-                      (gnus-uncompress-range
-                       (cdr (assq 'tick (gnus-info-marks info))))
-                      (gnus-uncompress-range
-                       (cdr (assq 'dormant
-                                  (gnus-info-marks info))))))))
-             (nov-file (concat dir ".overview"))
-             (cnt 0)
-             (completed -1)
-             dlist
-             type)
-
-        ;; The normal article alist contains elements that look like
-        ;; (article# .  fetch_date) I need to combine other
-        ;; information with this list.  For example, a flag indicating
-        ;; that a particular article MUST BE KEPT.  To do this, I'm
-        ;; going to transform the elements to look like (article#
-        ;; fetch_date keep_flag NOV_entry_marker) Later, I'll reverse
-        ;; the process to generate the expired article alist.
-
-        ;; Convert the alist elements to (article# fetch_date nil
-        ;; nil).
-        (setq dlist (mapcar (lambda (e)
-                              (list (car e) (cdr e) nil nil)) alist))
-
-        ;; Convert the keep lists to elements that look like (article#
-        ;; nil keep_flag nil) then append it to the expanded dlist
-        ;; These statements are sorted by ascending precidence of the
-        ;; keep_flag.
-        (setq dlist (nconc dlist
-                           (mapcar (lambda (e)
-                                     (list e nil 'unread  nil))
-                                   unreads)))
-        (setq dlist (nconc dlist
-                           (mapcar (lambda (e)
-                                     (list e nil 'marked  nil))
-                                   marked)))
-        (setq dlist (nconc dlist
-                           (mapcar (lambda (e)
-                                     (list e nil 'special nil))
-                                   specials)))
-
-        (set-buffer overview)
-        (erase-buffer)
-        (buffer-disable-undo)
-        (when (file-exists-p nov-file)
-          (gnus-message 7 "gnus-agent-expire: Loading overview...")
-          (nnheader-insert-file-contents nov-file)
-          (goto-char (point-min))
-
-          (let (p)
-            (while (< (setq p (point)) (point-max))
-              (condition-case nil
-                  ;; If I successfully read an integer (the plus zero
-                  ;; ensures a numeric type), prepend a marker entry
-                  ;; to the list
-                  (push (list (+ 0 (read (current-buffer))) nil nil
-                              (set-marker (make-marker) p))
-                        dlist)
-                (error
-                 (gnus-message 1 "gnus-agent-expire: read error \
+    (gnus-agent-with-refreshed-group 
+     group
+     (when (boundp 'gnus-agent-expire-current-dirs)
+       (set 'gnus-agent-expire-current-dirs 
+           (cons dir 
+                 (symbol-value 'gnus-agent-expire-current-dirs))))
+
+     (if (and (not force)
+             (eq 'DISABLE (gnus-agent-find-parameter group 
+                                                     'agent-enable-expiration)))
+        (gnus-message 5 "Expiry skipping over %s" group)
+       (gnus-message 5 "Expiring articles in %s" group)
+       (gnus-agent-load-alist group)
+       (let* ((bytes-freed 0)
+             (size-files-deleted 0.0)
+             (files-deleted 0)
+             (nov-entries-deleted 0)
+             (info (gnus-get-info group))
+             (alist gnus-agent-article-alist)
+             (day (- (time-to-days (current-time))
+                     (gnus-agent-find-parameter group 'agent-days-until-old)))
+             (specials (if (and alist
+                                (not force))
+                           ;; This could be a bit of a problem.  I need to
+                           ;; keep the last article to avoid refetching
+                           ;; headers when using nntp in the backend.  At
+                           ;; the same time, if someone uses a backend
+                           ;; that supports article moving then I may have
+                           ;; to remove the last article to complete the
+                           ;; move.  Right now, I'm going to assume that
+                           ;; FORCE overrides specials.
+                           (list (caar (last alist)))))
+             (unreads ;; Articles that are excluded from the
+              ;; expiration process
+              (cond (gnus-agent-expire-all
+                     ;; All articles are marked read by global decree
+                     nil)
+                    ((eq articles t)
+                     ;; All articles are marked read by function
+                     ;; parameter
+                     nil)
+                    ((not articles)
+                     ;; Unread articles are marked protected from
+                     ;; expiration Don't call
+                     ;; gnus-list-of-unread-articles as it returns
+                     ;; articles that have not been fetched into the
+                     ;; agent.
+                     (ignore-errors
+                       (gnus-agent-unread-articles group)))
+                    (t
+                     ;; All articles EXCEPT those named by the caller
+                     ;; are protected from expiration
+                     (gnus-sorted-difference
+                      (gnus-uncompress-range
+                       (cons (caar alist)
+                             (caar (last alist))))
+                      (sort articles '<)))))
+             (marked ;; More articles that are excluded from the
+              ;; expiration process
+              (cond (gnus-agent-expire-all
+                     ;; All articles are unmarked by global decree
+                     nil)
+                    ((eq articles t)
+                     ;; All articles are unmarked by function
+                     ;; parameter
+                     nil)
+                    (articles
+                     ;; All articles may as well be unmarked as the
+                     ;; unreads list already names the articles we are
+                     ;; going to keep
+                     nil)
+                    (t
+                     ;; Ticked and/or dormant articles are excluded
+                     ;; from expiration
+                     (nconc
+                      (gnus-uncompress-range
+                       (cdr (assq 'tick (gnus-info-marks info))))
+                      (gnus-uncompress-range
+                       (cdr (assq 'dormant
+                                  (gnus-info-marks info))))))))
+             (nov-file (concat dir ".overview"))
+             (cnt 0)
+             (completed -1)
+             dlist
+             type)
+
+        ;; The normal article alist contains elements that look like
+        ;; (article# .  fetch_date) I need to combine other
+        ;; information with this list.  For example, a flag indicating
+        ;; that a particular article MUST BE KEPT.  To do this, I'm
+        ;; going to transform the elements to look like (article#
+        ;; fetch_date keep_flag NOV_entry_marker) Later, I'll reverse
+        ;; the process to generate the expired article alist.
+
+        ;; Convert the alist elements to (article# fetch_date nil
+        ;; nil).
+        (setq dlist (mapcar (lambda (e)
+                              (list (car e) (cdr e) nil nil)) alist))
+
+        ;; Convert the keep lists to elements that look like (article#
+        ;; nil keep_flag nil) then append it to the expanded dlist
+        ;; These statements are sorted by ascending precidence of the
+        ;; keep_flag.
+        (setq dlist (nconc dlist
+                           (mapcar (lambda (e)
+                                     (list e nil 'unread  nil))
+                                   unreads)))
+        (setq dlist (nconc dlist
+                           (mapcar (lambda (e)
+                                     (list e nil 'marked  nil))
+                                   marked)))
+        (setq dlist (nconc dlist
+                           (mapcar (lambda (e)
+                                     (list e nil 'special nil))
+                                   specials)))
+
+        (set-buffer overview)
+        (erase-buffer)
+        (buffer-disable-undo)
+        (when (file-exists-p nov-file)
+          (gnus-message 7 "gnus-agent-expire: Loading overview...")
+          (nnheader-insert-file-contents nov-file)
+          (goto-char (point-min))
+
+          (let (p)
+            (while (< (setq p (point)) (point-max))
+              (condition-case nil
+                  ;; If I successfully read an integer (the plus zero
+                  ;; ensures a numeric type), prepend a marker entry
+                  ;; to the list
+                  (push (list (+ 0 (read (current-buffer))) nil nil
+                              (set-marker (make-marker) p))
+                        dlist)
+                (error
+                 (gnus-message 1 "gnus-agent-expire: read error \
 occurred when reading expression at %s in %s.  Skipping to next \
 line." (point) nov-file)))
-              ;; Whether I succeeded, or failed, it doesn't matter.
-              ;; Move to the next line then try again.
-              (forward-line 1)))
-
-          (gnus-message
-           7 "gnus-agent-expire: Loading overview... Done"))
-        (set-buffer-modified-p nil)
-
-        ;; At this point, all of the information is in dlist.  The
-        ;; only problem is that much of it is spread across multiple
-        ;; entries.  Sort then MERGE!!
-        (gnus-message 7 "gnus-agent-expire: Sorting entries... ")
-        ;; If two entries have the same article-number then sort by
-        ;; ascending keep_flag.
-        (let ((special 0)
-              (marked 1)
-              (unread 2))
-          (setq dlist
-                (sort dlist
-                      (lambda (a b)
-                        (cond ((< (nth 0 a) (nth 0 b))
-                               t)
-                              ((> (nth 0 a) (nth 0 b))
-                               nil)
-                              (t
-                               (let ((a (or (symbol-value (nth 2 a))
-                                            3))
-                                     (b (or (symbol-value (nth 2 b))
-                                            3)))
-                                 (<= a b))))))))
-        (gnus-message 7 "gnus-agent-expire: Sorting entries... Done")
-        (gnus-message 7 "gnus-agent-expire: Merging entries... ")
-        (let ((dlist dlist))
-          (while (cdr dlist)            ; I'm not at the end-of-list
-            (if (eq (caar dlist) (caadr dlist))
-                (let ((first (cdr (car dlist)))
-                      (secnd (cdr (cadr dlist))))
-                  (setcar first (or (car first)
-                                    (car secnd))) ; fetch_date
-                  (setq first (cdr first)
-                        secnd (cdr secnd))
-                  (setcar first (or (car first)
-                                    (car secnd))) ; Keep_flag
-                  (setq first (cdr first)
-                        secnd (cdr secnd))
-                  (setcar first (or (car first)
-                                    (car secnd))) ; NOV_entry_marker
-
-                  (setcdr dlist (cddr dlist)))
-              (setq dlist (cdr dlist)))))
-        (gnus-message 7 "gnus-agent-expire: Merging entries... Done")
-
-        (let* ((len (float (length dlist)))
-               (alist (list nil))
-               (tail-alist alist))
-          (while dlist
-            (let ((new-completed (truncate (* 100.0
-                                              (/ (setq cnt (1+ cnt))
-                                                 len))))
-                 message-log-max)
-              (when (> new-completed completed)
-                (setq completed new-completed)
-                (gnus-message 7 "%3d%% completed..."  completed)))
-            (let* ((entry          (car dlist))
-                   (article-number (nth 0 entry))
-                   (fetch-date     (nth 1 entry))
-                   (keep           (nth 2 entry))
-                   (marker         (nth 3 entry)))
-
-              (cond
-               ;; Kept articles are unread, marked, or special.
-               (keep
-                (gnus-agent-message 10
-                                    "gnus-agent-expire: %s:%d: Kept %s article%s."
-                                    group article-number keep (if fetch-date " and file" ""))
-                (when fetch-date
-                  (unless (file-exists-p
-                           (concat dir (number-to-string
-                                        article-number)))
-                    (setf (nth 1 entry) nil)
-                    (gnus-agent-message 3 "gnus-agent-expire cleared \
+              ;; Whether I succeeded, or failed, it doesn't matter.
+              ;; Move to the next line then try again.
+              (forward-line 1)))
+
+          (gnus-message
+           7 "gnus-agent-expire: Loading overview... Done"))
+        (set-buffer-modified-p nil)
+
+        ;; At this point, all of the information is in dlist.  The
+        ;; only problem is that much of it is spread across multiple
+        ;; entries.  Sort then MERGE!!
+        (gnus-message 7 "gnus-agent-expire: Sorting entries... ")
+        ;; If two entries have the same article-number then sort by
+        ;; ascending keep_flag.
+        (let ((special 0)
+              (marked 1)
+              (unread 2))
+          (setq dlist
+                (sort dlist
+                      (lambda (a b)
+                        (cond ((< (nth 0 a) (nth 0 b))
+                               t)
+                              ((> (nth 0 a) (nth 0 b))
+                               nil)
+                              (t
+                               (let ((a (or (symbol-value (nth 2 a))
+                                            3))
+                                     (b (or (symbol-value (nth 2 b))
+                                            3)))
+                                 (<= a b))))))))
+        (gnus-message 7 "gnus-agent-expire: Sorting entries... Done")
+        (gnus-message 7 "gnus-agent-expire: Merging entries... ")
+        (let ((dlist dlist))
+          (while (cdr dlist)           ; I'm not at the end-of-list
+            (if (eq (caar dlist) (caadr dlist))
+                (let ((first (cdr (car dlist)))
+                      (secnd (cdr (cadr dlist))))
+                  (setcar first (or (car first)
+                                    (car secnd))) ; fetch_date
+                  (setq first (cdr first)
+                        secnd (cdr secnd))
+                  (setcar first (or (car first)
+                                    (car secnd))) ; Keep_flag
+                  (setq first (cdr first)
+                        secnd (cdr secnd))
+                  (setcar first (or (car first)
+                                    (car secnd))) ; NOV_entry_marker
+
+                  (setcdr dlist (cddr dlist)))
+              (setq dlist (cdr dlist)))))
+        (gnus-message 7 "gnus-agent-expire: Merging entries... Done")
+
+        (let* ((len (float (length dlist)))
+               (alist (list nil))
+               (tail-alist alist))
+          (while dlist
+            (let ((new-completed (truncate (* 100.0
+                                              (/ (setq cnt (1+ cnt))
+                                                 len))))
+                  message-log-max)
+              (when (> new-completed completed)
+                (setq completed new-completed)
+                (gnus-message 7 "%3d%% completed..."  completed)))
+            (let* ((entry          (car dlist))
+                   (article-number (nth 0 entry))
+                   (fetch-date     (nth 1 entry))
+                   (keep           (nth 2 entry))
+                   (marker         (nth 3 entry)))
+
+              (cond
+               ;; Kept articles are unread, marked, or special.
+               (keep
+                (gnus-agent-message 10
+                                    "gnus-agent-expire: %s:%d: Kept %s article%s."
+                                    group article-number keep (if fetch-date " and file" ""))
+                (when fetch-date
+                  (unless (file-exists-p
+                           (concat dir (number-to-string
+                                        article-number)))
+                    (setf (nth 1 entry) nil)
+                    (gnus-agent-message 3 "gnus-agent-expire cleared \
 download flag on %s:%d as the cached article file is missing."
-                                        group (caar dlist)))
-                  (unless marker
-                    (gnus-message 1 "gnus-agent-expire detected a \
+                                        group (caar dlist)))
+                  (unless marker
+                    (gnus-message 1 "gnus-agent-expire detected a \
 missing NOV entry.  Run gnus-agent-regenerate-group to restore it.")))
-                (gnus-agent-append-to-list
-                 tail-alist
-                 (cons article-number fetch-date)))
-
-               ;; The following articles are READ, UNMARKED, and
-               ;; ORDINARY.  See if they can be EXPIRED!!!
-               ((setq type
-                      (cond
-                       ((not (integerp fetch-date))
-                        'read) ;; never fetched article (may expire
-                       ;; right now)
-                       ((not (file-exists-p
-                              (concat dir (number-to-string
-                                           article-number))))
-                        (setf (nth 1 entry) nil)
-                        'externally-expired) ;; Can't find the cached
-                       ;; article.  Handle case
-                       ;; as though this article
-                       ;; was never fetched.
-
-                       ;; We now have the arrival day, so we see
-                       ;; whether it's old enough to be expired.
-                       ((< fetch-date day)
-                        'expired)
-                       (force
-                        'forced)))
-
-                ;; I found some reason to expire this entry.
-
-                (let ((actions nil))
-                  (when (memq type '(forced expired))
-                    (ignore-errors      ; Just being paranoid.
-                      (let ((file-name (concat dir (number-to-string
-                                                article-number))))
-                        (incf (nth 2 stats) (nth 7 (file-attributes file-name)))
-                        (incf (nth 1 stats))
-                        (delete-file file-name))
-                      (push "expired cached article" actions))
-                    (setf (nth 1 entry) nil)
-                    )
-
-                  (when marker
-                    (push "NOV entry removed" actions)
-                    (goto-char marker)
-
-                    (incf (nth 0 stats))
-
-                    (let ((from (point-at-bol))
-                          (to (progn (forward-line 1) (point))))
-                      (incf (nth 2 stats) (- to from))
-                      (delete-region from to)))
-
-                  ;; If considering all articles is set, I can only
-                  ;; expire article IDs that are no longer in the
-                  ;; active range (That is, articles that preceed the
-                  ;; first article in the new alist).
-                  (if (and gnus-agent-consider-all-articles
-                           (>= article-number (car active)))
-                      ;; I have to keep this ID in the alist
-                      (gnus-agent-append-to-list
-                       tail-alist (cons article-number fetch-date))
-                    (push (format "Removed %s article number from \
+                (gnus-agent-append-to-list
+                 tail-alist
+                 (cons article-number fetch-date)))
+
+               ;; The following articles are READ, UNMARKED, and
+               ;; ORDINARY.  See if they can be EXPIRED!!!
+               ((setq type
+                      (cond
+                       ((not (integerp fetch-date))
+                        'read) ;; never fetched article (may expire
+                       ;; right now)
+                       ((not (file-exists-p
+                              (concat dir (number-to-string
+                                           article-number))))
+                        (setf (nth 1 entry) nil)
+                        'externally-expired) ;; Can't find the cached
+                       ;; article.  Handle case
+                       ;; as though this article
+                       ;; was never fetched.
+
+                       ;; We now have the arrival day, so we see
+                       ;; whether it's old enough to be expired.
+                       ((< fetch-date day)
+                        'expired)
+                       (force
+                        'forced)))
+
+                ;; I found some reason to expire this entry.
+
+                (let ((actions nil))
+                  (when (memq type '(forced expired))
+                    (ignore-errors     ; Just being paranoid.
+                      (let* ((file-name (nnheader-concat dir (number-to-string
+                                                              article-number)))
+                             (size (float (nth 7 (file-attributes file-name)))))
+                        (incf bytes-freed size)
+                        (incf size-files-deleted size)
+                        (incf files-deleted)
+                        (delete-file file-name))
+                      (push "expired cached article" actions))
+                    (setf (nth 1 entry) nil)
+                    )
+
+                  (when marker
+                    (push "NOV entry removed" actions)
+                    (goto-char marker)
+
+                    (incf nov-entries-deleted)
+
+                    (let ((from (point-at-bol))
+                          (to (progn (forward-line 1) (point))))
+                      (incf bytes-freed (- to from))
+                      (delete-region from to)))
+
+                  ;; If considering all articles is set, I can only
+                  ;; expire article IDs that are no longer in the
+                  ;; active range (That is, articles that preceed the
+                  ;; first article in the new alist).
+                  (if (and gnus-agent-consider-all-articles
+                           (>= article-number (car active)))
+                      ;; I have to keep this ID in the alist
+                      (gnus-agent-append-to-list
+                       tail-alist (cons article-number fetch-date))
+                    (push (format "Removed %s article number from \
 article alist" type) actions))
 
-                 (when actions
-                   (gnus-agent-message 8 "gnus-agent-expire: %s:%d: %s"
-                                       group article-number
-                                       (mapconcat 'identity actions ", ")))))
-               (t
-                (gnus-agent-message
-                 10 "gnus-agent-expire: %s:%d: Article kept as \
+                  (when actions
+                    (gnus-agent-message 8 "gnus-agent-expire: %s:%d: %s"
+                                        group article-number
+                                        (mapconcat 'identity actions ", ")))))
+               (t
+                (gnus-agent-message
+                 10 "gnus-agent-expire: %s:%d: Article kept as \
 expiration tests failed." group article-number)
-                (gnus-agent-append-to-list
-                 tail-alist (cons article-number fetch-date)))
-               )
-
-              ;; Clean up markers as I want to recycle this buffer
-              ;; over several groups.
-              (when marker
-                (set-marker marker nil))
-
-              (setq dlist (cdr dlist))))
-
-          (setq alist (cdr alist))
-
-          (let ((inhibit-quit t))
-            (unless (equal alist gnus-agent-article-alist)
-              (setq gnus-agent-article-alist alist)
-              (gnus-agent-save-alist group))
-
-            (when (buffer-modified-p)
-              (let ((coding-system-for-write
-                     gnus-agent-file-coding-system))
-                (gnus-make-directory dir)
-                (write-region (point-min) (point-max) nov-file nil
-                              'silent)
-                ;; clear the modified flag as that I'm not confused by
-                ;; its status on the next pass through this routine.
-                (set-buffer-modified-p nil)))
-
-            (when (eq articles t)
-              (gnus-summary-update-info))))))))
+                (gnus-agent-append-to-list
+                 tail-alist (cons article-number fetch-date)))
+               )
+
+              ;; Clean up markers as I want to recycle this buffer
+              ;; over several groups.
+              (when marker
+                (set-marker marker nil))
+
+              (setq dlist (cdr dlist))))
+
+          (setq alist (cdr alist))
+
+          (let ((inhibit-quit t))
+            (unless (equal alist gnus-agent-article-alist)
+              (setq gnus-agent-article-alist alist)
+              (gnus-agent-save-alist group))
+
+            (when (buffer-modified-p)
+              (let ((coding-system-for-write
+                     gnus-agent-file-coding-system))
+                (gnus-make-directory dir)
+                (write-region (point-min) (point-max) nov-file nil
+                              'silent)
+                ;; clear the modified flag as that I'm not confused by
+                ;; its status on the next pass through this routine.
+                (set-buffer-modified-p nil)
+                (gnus-agent-update-view-total-fetched-for group t)))
+
+            (when (eq articles t)
+              (gnus-summary-update-info))))
+
+        (when (boundp 'gnus-agent-expire-stats)
+          (let ((stats (symbol-value 'gnus-agent-expire-stats)))
+            (incf (nth 2 stats) bytes-freed)
+            (incf (nth 1 stats) files-deleted)
+            (incf (nth 0 stats) nov-entries-deleted)))
+
+        (gnus-agent-update-files-total-fetched-for group (- size-files-deleted)))))))
 
 (defun gnus-agent-expire (&optional articles group force)
   "Expire all old articles.
@@ -3377,18 +3490,20 @@ has been fetched."
            (set-buffer nntp-server-buffer)
            (copy-to-buffer gnus-agent-overview-buffer (point-min) (point-max))
 
-            ;; Merge the temp buffer with the known headers (found on
-            ;; disk in FILE) into the nntp-server-buffer
+           ;; Merge the temp buffer with the known headers (found on
+           ;; disk in FILE) into the nntp-server-buffer
            (when (and uncached-articles (file-exists-p file))
              (gnus-agent-braid-nov group uncached-articles file))
 
-            ;; Save the new set of known headers to FILE
+           ;; Save the new set of known headers to FILE
            (set-buffer nntp-server-buffer)
            (let ((coding-system-for-write
                   gnus-agent-file-coding-system))
              (gnus-agent-check-overview-buffer)
              (write-region (point-min) (point-max) file nil 'silent))
 
+           (gnus-agent-update-view-total-fetched-for group t)
+
             ;; Update the group's article alist to include the newly
             ;; fetched articles.
            (gnus-agent-load-alist group)
@@ -3431,6 +3546,9 @@ has been fetched."
 (defun gnus-agent-regenerate-group (group &optional reread)
   "Regenerate GROUP.
 If REREAD is t, all articles in the .overview are marked as unread.
+If REREAD is a list, the specified articles will be marked as unread.
+In addition, their NOV entries in .overview will be refreshed using
+the articles' current headers.
 If REREAD is not nil, downloaded articles are marked as unread."
   (interactive
    (list (let ((def (or (gnus-group-group-name)
@@ -3459,189 +3577,195 @@ If REREAD is not nil, downloaded articles are marked as unread."
                     (gnus-message 3 "Ignoring unexpected input")
                     (sit-for 1)
                     t)))))
-
   (when group
-      (gnus-message 5 "Regenerating in %s" group)
-      (let* ((gnus-command-method (or gnus-command-method
-                                      (gnus-find-method-for-group group)))
-             (file (gnus-agent-article-name ".overview" group))
-             (dir (file-name-directory file))
-             point
-             (downloaded (if (file-exists-p dir)
-                             (sort (mapcar (lambda (name) (string-to-int name))
-                                           (directory-files dir nil "^[0-9]+$" t))
-                                   '>)
-                           (progn (gnus-make-directory dir) nil)))
-             dl nov-arts
-             alist header
-             regenerated)
-
-        (mm-with-unibyte-buffer
-          (if (file-exists-p file)
-              (let ((nnheader-file-coding-system
-                     gnus-agent-file-coding-system))
-                (nnheader-insert-file-contents file)))
-          (set-buffer-modified-p nil)
-
-          ;; Load the article IDs found in the overview file.  As a
-          ;; side-effect, validate the file contents.
-          (let ((load t))
-            (while load
-              (setq load nil)
-              (goto-char (point-min))
-              (while (< (point) (point-max))
-                (cond ((and (looking-at "[0-9]+\t")
-                            (<= (- (match-end 0) (match-beginning 0)) 9))
-                       (push (read (current-buffer)) nov-arts)
-                       (forward-line 1)
-                       (let ((l1 (car nov-arts))
-                             (l2 (cadr nov-arts)))
-                         (cond ((not l2)
-                                nil)
-                               ((< l1 l2)
-                                (gnus-message 3 "gnus-agent-regenerate-group: NOV\
+    (gnus-message 5 "Regenerating in %s" group)
+    (let* ((gnus-command-method (or gnus-command-method
+                                   (gnus-find-method-for-group group)))
+          (file (gnus-agent-article-name ".overview" group))
+          (dir (file-name-directory file))
+          point
+          (downloaded (if (file-exists-p dir)
+                          (sort (mapcar (lambda (name) (string-to-int name))
+                                        (directory-files dir nil "^[0-9]+$" t))
+                                '>)
+                        (progn (gnus-make-directory dir) nil)))
+          dl nov-arts
+          alist header
+          regenerated)
+
+      (mm-with-unibyte-buffer
+       (if (file-exists-p file)
+           (let ((nnheader-file-coding-system
+                  gnus-agent-file-coding-system))
+             (nnheader-insert-file-contents file)))
+       (set-buffer-modified-p nil)
+
+       ;; Load the article IDs found in the overview file.  As a
+       ;; side-effect, validate the file contents.
+       (let ((load t))
+         (while load
+           (setq load nil)
+           (goto-char (point-min))
+           (while (< (point) (point-max))
+             (cond ((and (looking-at "[0-9]+\t")
+                         (<= (- (match-end 0) (match-beginning 0)) 9))
+                    (push (read (current-buffer)) nov-arts)
+                    (forward-line 1)
+                    (let ((l1 (car nov-arts))
+                          (l2 (cadr nov-arts)))
+                      (cond ((and (listp reread) (memq l1 reread))
+                             (gnus-delete-line)
+                             (setq nov-arts (cdr nov-arts))
+                             (gnus-message 4 "gnus-agent-regenerate-group: NOV\
+entry of article %s deleted." l1))
+                            ((not l2)
+                             nil)
+                            ((< l1 l2)
+                             (gnus-message 3 "gnus-agent-regenerate-group: NOV\
  entries are NOT in ascending order.")
-                                ;; Don't sort now as I haven't verified
-                                ;; that every line begins with a number
-                                (setq load t))
-                               ((= l1 l2)
-                                (forward-line -1)
-                                (gnus-message 4 "gnus-agent-regenerate-group: NOV\
+                             ;; Don't sort now as I haven't verified
+                             ;; that every line begins with a number
+                             (setq load t))
+                            ((= l1 l2)
+                             (forward-line -1)
+                             (gnus-message 4 "gnus-agent-regenerate-group: NOV\
  entries contained duplicate of article %s.     Duplicate deleted." l1)
-                                (gnus-delete-line)
-                                (setq nov-arts (cdr nov-arts))))))
-                      (t
-                       (gnus-message 1 "gnus-agent-regenerate-group: NOV\
+                             (gnus-delete-line)
+                             (setq nov-arts (cdr nov-arts))))))
+                   (t
+                    (gnus-message 1 "gnus-agent-regenerate-group: NOV\
  entries contained line that did not begin with an article number.  Deleted\
  line.")
-                       (gnus-delete-line))))
-              (when load
-               (gnus-message 5 "gnus-agent-regenerate-group: Sorting NOV\
+                    (gnus-delete-line))))
+           (when load
+             (gnus-message 5 "gnus-agent-regenerate-group: Sorting NOV\
  entries into ascending order.")
-               (sort-numeric-fields 1 (point-min) (point-max))
-               (setq nov-arts nil))))
-          (gnus-agent-check-overview-buffer)
-
-          ;; Construct a new article alist whose nodes match every header
-          ;; in the .overview file.  As a side-effect, missing headers are
-          ;; reconstructed from the downloaded article file.
-          (while (or downloaded nov-arts)
-            (cond ((and downloaded
-                        (or (not nov-arts)
-                            (> (car downloaded) (car nov-arts))))
-                   ;; This entry is missing from the overview file
-                   (gnus-message 3 "Regenerating NOV %s %d..." group
-                                 (car downloaded))
-                   (let ((file (concat dir (number-to-string (car downloaded)))))
-                     (mm-with-unibyte-buffer
-                       (nnheader-insert-file-contents file)
-                       (nnheader-remove-body)
-                       (setq header (nnheader-parse-naked-head)))
-                     (mail-header-set-number header (car downloaded))
-                     (if nov-arts
-                         (let ((key (concat "^" (int-to-string (car nov-arts))
-                                            "\t")))
-                           (or (re-search-backward key nil t)
-                               (re-search-forward key))
-                           (forward-line 1))
-                       (goto-char (point-min)))
-                     (nnheader-insert-nov header))
-                   (setq nov-arts (cons (car downloaded) nov-arts)))
-                  ((eq (car downloaded) (car nov-arts))
-                   ;; This entry in the overview has been downloaded
-                   (push (cons (car downloaded)
-                               (time-to-days
-                                (nth 5 (file-attributes
-                                        (concat dir (number-to-string
-                                                     (car downloaded))))))) alist)
-                   (setq downloaded (cdr downloaded))
-                   (setq nov-arts (cdr nov-arts)))
-                  (t
-                   ;; This entry in the overview has not been downloaded
-                   (push (cons (car nov-arts) nil) alist)
-                   (setq nov-arts (cdr nov-arts)))))
-
-          ;; When gnus-agent-consider-all-articles is set,
-          ;; gnus-agent-regenerate-group should NOT remove article IDs from
-          ;; the alist.  Those IDs serve as markers to indicate that an
-          ;; attempt has been made to fetch that article's header.
-
-          ;; When gnus-agent-consider-all-articles is NOT set,
-          ;; gnus-agent-regenerate-group can remove the article ID of every
-          ;; article (with the exception of the last ID in the list - it's
-          ;; special) that no longer appears in the overview.  In this
-          ;; situtation, the last article ID in the list implies that it,
-          ;; and every article ID preceeding it, have been fetched from the
-          ;; server.
-
-          (if gnus-agent-consider-all-articles
-              ;; Restore all article IDs that were not found in the overview file.
-              (let* ((n (cons nil alist))
-                     (merged n)
-                     (o (gnus-agent-load-alist group)))
-                (while o
-                  (let ((nID (caadr n))
-                        (oID (caar o)))
-                    (cond ((not nID)
-                           (setq n (setcdr n (list (list oID))))
-                           (setq o (cdr o)))
-                          ((< oID nID)
-                           (setcdr n (cons (list oID) (cdr n)))
-                           (setq o (cdr o)))
-                          ((= oID nID)
-                           (setq o (cdr o))
-                           (setq n (cdr n)))
-                          (t
-                           (setq n (cdr n))))))
-                (setq alist (cdr merged)))
-            ;; Restore the last article ID if it is not already in the new alist
-            (let ((n (last alist))
-                  (o (last (gnus-agent-load-alist group))))
-              (cond ((not o)
-                     nil)
-                    ((not n)
-                     (push (cons (caar o) nil) alist))
-                    ((< (caar n) (caar o))
-                     (setcdr n (list (car o)))))))
-
-          (let ((inhibit-quit t))
-            (if (setq regenerated (buffer-modified-p))
-                (let ((coding-system-for-write gnus-agent-file-coding-system))
-                  (write-region (point-min) (point-max) file nil 'silent)))
-
-            (setq regenerated (or regenerated
-                                  (and reread gnus-agent-article-alist)
-                                  (not (equal alist gnus-agent-article-alist))))
-
-            (setq gnus-agent-article-alist alist)
-
-            (when regenerated
-              (gnus-agent-save-alist group)
+             (sort-numeric-fields 1 (point-min) (point-max))
+             (setq nov-arts nil))))
+       (gnus-agent-check-overview-buffer)
+
+       ;; Construct a new article alist whose nodes match every header
+       ;; in the .overview file.  As a side-effect, missing headers are
+       ;; reconstructed from the downloaded article file.
+       (while (or downloaded nov-arts)
+         (cond ((and downloaded
+                     (or (not nov-arts)
+                         (> (car downloaded) (car nov-arts))))
+                ;; This entry is missing from the overview file
+                (gnus-message 3 "Regenerating NOV %s %d..." group
+                              (car downloaded))
+                (let ((file (concat dir (number-to-string (car downloaded)))))
+                  (mm-with-unibyte-buffer
+                    (nnheader-insert-file-contents file)
+                    (nnheader-remove-body)
+                    (setq header (nnheader-parse-naked-head)))
+                  (mail-header-set-number header (car downloaded))
+                  (if nov-arts
+                      (let ((key (concat "^" (int-to-string (car nov-arts))
+                                         "\t")))
+                        (or (re-search-backward key nil t)
+                            (re-search-forward key))
+                        (forward-line 1))
+                    (goto-char (point-min)))
+                  (nnheader-insert-nov header))
+                (setq nov-arts (cons (car downloaded) nov-arts)))
+               ((eq (car downloaded) (car nov-arts))
+                ;; This entry in the overview has been downloaded
+                (push (cons (car downloaded)
+                            (time-to-days
+                             (nth 5 (file-attributes
+                                     (concat dir (number-to-string
+                                                  (car downloaded))))))) alist)
+                (setq downloaded (cdr downloaded))
+                (setq nov-arts (cdr nov-arts)))
+               (t
+                ;; This entry in the overview has not been downloaded
+                (push (cons (car nov-arts) nil) alist)
+                (setq nov-arts (cdr nov-arts)))))
+
+       ;; When gnus-agent-consider-all-articles is set,
+       ;; gnus-agent-regenerate-group should NOT remove article IDs from
+       ;; the alist.  Those IDs serve as markers to indicate that an
+       ;; attempt has been made to fetch that article's header.
+
+       ;; When gnus-agent-consider-all-articles is NOT set,
+       ;; gnus-agent-regenerate-group can remove the article ID of every
+       ;; article (with the exception of the last ID in the list - it's
+       ;; special) that no longer appears in the overview.  In this
+       ;; situtation, the last article ID in the list implies that it,
+       ;; and every article ID preceeding it, have been fetched from the
+       ;; server.
+
+       (if gnus-agent-consider-all-articles
+           ;; Restore all article IDs that were not found in the overview file.
+           (let* ((n (cons nil alist))
+                  (merged n)
+                  (o (gnus-agent-load-alist group)))
+             (while o
+               (let ((nID (caadr n))
+                     (oID (caar o)))
+                 (cond ((not nID)
+                        (setq n (setcdr n (list (list oID))))
+                        (setq o (cdr o)))
+                       ((< oID nID)
+                        (setcdr n (cons (list oID) (cdr n)))
+                        (setq o (cdr o)))
+                       ((= oID nID)
+                        (setq o (cdr o))
+                        (setq n (cdr n)))
+                       (t
+                        (setq n (cdr n))))))
+             (setq alist (cdr merged)))
+         ;; Restore the last article ID if it is not already in the new alist
+         (let ((n (last alist))
+               (o (last (gnus-agent-load-alist group))))
+           (cond ((not o)
+                  nil)
+                 ((not n)
+                  (push (cons (caar o) nil) alist))
+                 ((< (caar n) (caar o))
+                  (setcdr n (list (car o)))))))
+
+       (let ((inhibit-quit t))
+         (if (setq regenerated (buffer-modified-p))
+             (let ((coding-system-for-write gnus-agent-file-coding-system))
+               (write-region (point-min) (point-max) file nil 'silent)))
+
+         (setq regenerated (or regenerated
+                               (and reread gnus-agent-article-alist)
+                               (not (equal alist gnus-agent-article-alist))))
+
+         (setq gnus-agent-article-alist alist)
+
+         (when regenerated
+           (gnus-agent-save-alist group)
        
-              ;; I have to alter the group's active range NOW as
-              ;; gnus-make-ascending-articles-unread will use it to
-              ;; recalculate the number of unread articles in the group
-
-              (let ((group (gnus-group-real-name group))
-                    (group-active (gnus-active group)))
-                (gnus-agent-possibly-alter-active group group-active)))))
-
-        (when (and reread gnus-agent-article-alist)
-          (gnus-make-ascending-articles-unread
-           group
-           (delq nil (mapcar (function (lambda (c)
-                                         (cond ((eq reread t)
-                                                (car c))
-                                               ((cdr c)
-                                                (car c)))))
-                             gnus-agent-article-alist)))
-
-          (when (gnus-buffer-live-p gnus-group-buffer)
-            (gnus-group-update-group group t)
-            (sit-for 0)))
-
-        (gnus-message 5 nil)
-        regenerated)))
+           ;; I have to alter the group's active range NOW as
+           ;; gnus-make-ascending-articles-unread will use it to
+           ;; recalculate the number of unread articles in the group
+
+           (let ((group (gnus-group-real-name group))
+                 (group-active (or (gnus-active group)
+                                   (gnus-activate-group group))))
+             (gnus-agent-possibly-alter-active group group-active)))))
+
+      (when (and reread gnus-agent-article-alist)
+       (gnus-make-ascending-articles-unread
+        group
+        (if (listp reread)
+            reread
+          (delq nil (mapcar (function (lambda (c)
+                                        (cond ((eq reread t)
+                                               (car c))
+                                              ((cdr c)
+                                               (car c)))))
+                            gnus-agent-article-alist))))
+
+       (when regenerated
+           (gnus-agent-update-files-total-fetched-for group nil)))
+
+      (gnus-message 5 "")
+      regenerated)))
 
 ;;;###autoload
 (defun gnus-agent-regenerate (&optional clean reread)
@@ -3686,48 +3810,76 @@ If CLEAN, obsolete (ignore)."
 (defun gnus-agent-group-covered-p (group)
   (gnus-agent-method-p (gnus-group-method group)))
 
-(add-hook 'gnus-group-prepare-hook
-          (lambda ()
-            'gnus-agent-do-once
-
-            (when (listp gnus-agent-expire-days)
-              (beep)
-              (beep)
-              (gnus-message 1 "WARNING: gnus-agent-expire-days no longer\
- supports being set to a list.")(sleep-for 3)
-              (gnus-message 1 "Change your configuration to set it to an\
- integer.")(sleep-for 3)
-              (gnus-message 1 "I am now setting group parameters on each\
- group to match the configuration that the list offered.")
-
-              (save-excursion
-                (let ((groups (gnus-group-listed-groups)))
-                  (while groups
-                    (let* ((group (pop groups))
-                           (days gnus-agent-expire-days)
-                           (day (catch 'found
-                                  (while days
-                                    (when (eq 0 (string-match
-                                                 (caar days)
-                                                 group))
-                                      (throw 'found (cadar days)))
-                                    (setq days (cdr days)))
-                                  nil)))
-                      (when day
-                        (gnus-group-set-parameter group 'agent-days-until-old
-                                                  day))))))
-
-              (let ((h gnus-group-prepare-hook))
-                (while h
-                  (let ((func (pop h)))
-                    (when (and (listp func)
-                               (eq (cadr (caddr func)) 'gnus-agent-do-once))
-                      (remove-hook 'gnus-group-prepare-hook func)
-                      (setq h nil)))))
-
-              (gnus-message 1 "I have finished setting group parameters on\
- each group. You may now customize your groups and/or topics to control the\
- agent."))))
+(defun gnus-agent-update-files-total-fetched-for 
+  (group delta &optional method path)
+  "Update, or set, the total disk space used by the articles that the
+agent has fetched."
+  (when gnus-agent-total-fetched-hashtb
+    (gnus-agent-with-refreshed-group
+     group
+     ;; if null, gnus-agent-group-pathname will calc method.
+     (let* ((gnus-command-method method) 
+           (path (or path (gnus-agent-group-pathname group)))
+           (entry (or (gnus-gethash path gnus-agent-total-fetched-hashtb)
+                      (gnus-sethash path (make-list 3 0) 
+                                    gnus-agent-total-fetched-hashtb))))
+       (when (listp delta)
+        (unless delta
+          (setq delta (directory-files path nil "^-?[0-9]+$" t)))
+
+        (let ((sum 0.0)
+              file)
+          (while (setq file (pop delta))
+            (incf sum (float (or (nth 7 (file-attributes 
+                                         (nnheader-concat 
+                                          path 
+                                          (if (numberp file)
+                                              (number-to-string file)
+                                            file)))) 0))))
+          (setq delta sum)))
+
+       (setq gnus-agent-need-update-total-fetched-for t)
+       (incf (nth 2 entry) delta)))))
+
+(defun gnus-agent-update-view-total-fetched-for 
+  (group agent-over &optional method path)
+  "Update, or set, the total disk space used by the .agentview and
+.overview files.  These files are calculated separately as they can be
+modified."
+  (when gnus-agent-total-fetched-hashtb
+    (gnus-agent-with-refreshed-group
+     group
+     ;; if null, gnus-agent-group-pathname will calc method.
+     (let* ((gnus-command-method method) 
+           (path (or path (gnus-agent-group-pathname group)))
+           (entry (or (gnus-gethash path gnus-agent-total-fetched-hashtb)
+                      (gnus-sethash path (make-list 3 0) 
+                                    gnus-agent-total-fetched-hashtb)))
+           (size (or (nth 7 (file-attributes 
+                             (nnheader-concat
+                              path (if agent-over 
+                                       ".overview"
+                                     ".agentview"))))
+                     0)))
+       (setq gnus-agent-need-update-total-fetched-for t)
+       (setf (nth (if agent-over 1 0) entry) size)))))
+
+(defun gnus-agent-total-fetched-for (group &optional method no-inhibit)
+  "Get the total disk space used by the specified GROUP."
+  (unless gnus-agent-total-fetched-hashtb
+    (setq gnus-agent-total-fetched-hashtb (gnus-make-hashtable 1024)))
+
+  ;; if null, gnus-agent-group-pathname will calc method.
+  (let* ((gnus-command-method method) 
+        (path (gnus-agent-group-pathname group))
+        (entry (gnus-gethash path gnus-agent-total-fetched-hashtb)))
+    (if entry
+       (apply '+ entry)
+      (let ((gnus-agent-inhibit-update-total-fetched-for (not no-inhibit)))
+       (+ 
+        (gnus-agent-update-view-total-fetched-for  group nil method path)
+        (gnus-agent-update-view-total-fetched-for  group t   method path)
+        (gnus-agent-update-files-total-fetched-for group nil method path))))))
 
 (provide 'gnus-agent)