* gnus-agent.el (gnus-agent-read-servers): If getting method from
[gnus] / lisp / gnus-agent.el
index 38e96de..7db2bda 100644 (file)
@@ -157,6 +157,11 @@ If this is `ask' the hook will query the user."
 (defvar gnus-agent-file-coding-system 'raw-text)
 (defvar gnus-agent-file-loading-cache nil)
 
+(defvar gnus-agent-auto-agentize-methods '(nntp nnimap)
+  "Initially, all servers from these methods are agentized.
+The user may remove or add servers using the Server buffer.  See Info
+node `(gnus)Server Buffer'.")
+
 ;; Dynamic variables
 (defvar gnus-headers)
 (defvar gnus-score)
@@ -357,7 +362,7 @@ If this is `ask' the hook will query the user."
       (progn
        (setq gnus-plugged plugged)
        (gnus-run-hooks 'gnus-agent-plugged-hook)
-       (setcar (cdr gnus-agent-mode-status) 
+       (setcar (cdr gnus-agent-mode-status)
                (gnus-agent-make-mode-line-string " Plugged"
                                                  'mouse-2
                                                  'gnus-agent-toggle-plugged))
@@ -366,7 +371,7 @@ If this is `ask' the hook will query the user."
     (gnus-agent-close-connections)
     (setq gnus-plugged plugged)
     (gnus-run-hooks 'gnus-agent-unplugged-hook)
-    (setcar (cdr gnus-agent-mode-status) 
+    (setcar (cdr gnus-agent-mode-status)
            (gnus-agent-make-mode-line-string " Unplugged"
                                              'mouse-2
                                              'gnus-agent-toggle-plugged)))
@@ -419,7 +424,14 @@ minor mode in all Gnus buffers."
                                         message-send-mail-function)
          message-send-mail-real-function 'gnus-agent-send-mail))
   (unless gnus-agent-covered-methods
-    (setq gnus-agent-covered-methods (list gnus-select-method))))
+    (mapcar
+     (lambda (server)
+       (if (memq (car (gnus-server-to-method server)) 
+                gnus-agent-auto-agentize-methods)
+          (setq gnus-agent-covered-methods 
+                (cons (gnus-server-to-method server)
+                      gnus-agent-covered-methods ))))
+     (append (list gnus-select-method) gnus-secondary-select-methods))))
 
 (defun gnus-agent-queue-setup ()
   "Make sure the queue group exists."
@@ -476,6 +488,7 @@ be a select method."
              methods (cdr methods)))
       covered)))
 
+;;;###autoload
 (defun gnus-agent-possibly-save-gcc ()
   "Save GCC if Gnus is unplugged."
   (when (and (not gnus-plugged) (gnus-agent-any-covered-gcc))
@@ -627,9 +640,16 @@ be a select method."
 
 (defun gnus-agent-read-servers ()
   "Read the alist of covered servers."
-  (setq gnus-agent-covered-methods
-       (gnus-agent-read-file
-        (nnheader-concat gnus-agent-directory "lib/servers"))))
+  (mapcar (lambda (m)
+           (let ((server (gnus-server-get-method
+                          nil
+                          (or m "native"))))
+             (if server
+                 (push server gnus-agent-covered-methods)
+               (message "Ignoring disappeared server `%s'" m)
+               (sit-for 1))))
+         (gnus-agent-read-file
+          (nnheader-concat gnus-agent-directory "lib/servers"))))
 
 (defun gnus-agent-write-servers ()
   "Write the alist of covered servers."
@@ -637,7 +657,8 @@ be a select method."
   (let ((coding-system-for-write nnheader-file-coding-system)
        (file-name-coding-system nnmail-pathname-coding-system))
     (with-temp-file (nnheader-concat gnus-agent-directory "lib/servers")
-      (prin1 gnus-agent-covered-methods (current-buffer)))))
+      (prin1 (mapcar 'gnus-method-simplify gnus-agent-covered-methods)
+            (current-buffer)))))
 
 ;;;
 ;;; Summary commands
@@ -734,10 +755,13 @@ the actual number of articles toggled is returned."
        (pop gnus-newsgroup-undownloaded) gnus-catchup-mark)))
   (gnus-summary-position-point))
 
-(defun gnus-agent-summary-fetch-group ()
-  "Fetch the downloadable articles in the group."
-  (interactive)
-  (let ((articles gnus-newsgroup-downloadable)
+(defun gnus-agent-summary-fetch-group (&optional all)
+  "Fetch the downloadable articles in the group.
+Optional arg ALL, if non-nil, means to fetch all articles."
+  (interactive "P")
+  (let ((articles
+        (if all gnus-newsgroup-articles
+          gnus-newsgroup-downloadable))
        (gnus-command-method (gnus-find-method-for-group gnus-newsgroup-name))
        (state gnus-plugged))
     (unwind-protect
@@ -758,6 +782,15 @@ the actual number of articles toggled is returned."
                 gnus-plugged)
        (gnus-agent-toggle-plugged nil)))))
 
+(defun gnus-agent-fetch-selected-article ()
+  "Fetch the current article as it is selected.
+This can be added to `gnus-select-article-hook' or
+`gnus-mark-article-hook'."
+  (let ((gnus-command-method gnus-current-select-method))
+    (gnus-agent-fetch-articles
+     gnus-newsgroup-name
+     (list gnus-current-article))))
+
 ;;;
 ;;; Internal functions
 ;;;
@@ -821,7 +854,7 @@ the actual number of articles toggled is returned."
        (goto-char (point-min))
        (when (re-search-forward
               (concat "^" (regexp-quote group) " ") nil t)
-          (save-excursion
+         (save-excursion
            (read (current-buffer))                      ;; max
            (setq oactive-min (read (current-buffer))))  ;; min
          (gnus-delete-line))
@@ -981,7 +1014,7 @@ the actual number of articles toggled is returned."
                    (goto-char (match-end 0)))
                  (gnus-agent-crosspost crosses (caar pos))))
              (goto-char (point-min))
-             (if (not (re-search-forward 
+             (if (not (re-search-forward
                        "^Message-ID: *<\\([^>\n]+\\)>" nil t))
                  (setq id "No-Message-ID-in-article")
                (setq id (buffer-substring (match-beginning 1) (match-end 1))))
@@ -1054,7 +1087,7 @@ the actual number of articles toggled is returned."
     (setq articles (sort (gnus-uncompress-sequence articles) '<))
     ;; Remove known articles.
     (when (gnus-agent-load-alist group)
-      (setq articles (gnus-list-range-intersection 
+      (setq articles (gnus-list-range-intersection
                      articles
                      (list
                       (cons (1+ (caar (last gnus-agent-article-alist)))
@@ -1065,11 +1098,11 @@ the actual number of articles toggled is returned."
     (when articles
       (gnus-message 7 "Fetching headers for %s..." group)
       (save-excursion
-       (set-buffer nntp-server-buffer)
-       (unless (eq 'nov (gnus-retrieve-headers articles group))
-         (nnvirtual-convert-headers))
-       ;; Save these headers for later processing.
-       (copy-to-buffer gnus-agent-overview-buffer (point-min) (point-max))
+       (set-buffer nntp-server-buffer)
+       (unless (eq 'nov (gnus-retrieve-headers articles group))
+         (nnvirtual-convert-headers))
+       ;; Save these headers for later processing.
+       (copy-to-buffer gnus-agent-overview-buffer (point-min) (point-max))
        (when (file-exists-p file)
          (gnus-agent-braid-nov group articles file))
        (let ((coding-system-for-write
@@ -1214,12 +1247,12 @@ the actual number of articles toggled is returned."
                      (gnus-agent-fetch-group-1 group gnus-command-method))))))
          (error
           (unless (funcall gnus-agent-confirmation-function
-                           (format "Error (%s).  Continue? " err))
+                           (format "Error (%s).  Continue? " (cadr err)))
             (error "Cannot fetch articles into the Gnus agent")))
          (quit
           (unless (funcall gnus-agent-confirmation-function
                            (format "Quit fetching session (%s).  Continue? "
-                                   err))
+                                   (cadr err)))
             (signal 'quit "Cannot fetch articles into the Gnus agent"))))
        (pop methods))
       (run-hooks 'gnus-agent-fetch-hook)
@@ -1318,8 +1351,8 @@ Valid specifiers include:
 %c  Topic name (string)
 %g  The number of groups in the topic (integer)
 
-General format specifiers can also be used.  See
-(gnus)Formatting Variables.")
+General format specifiers can also be used.  See Info node
+`(gnus)Formatting Variables'.")
 
 (defvar gnus-category-mode-line-format "Gnus: %%b"
   "The format specification for the category mode line.")
@@ -1645,15 +1678,20 @@ The following commands are available:
   (or (gnus-gethash group gnus-category-group-cache)
       (assq 'default gnus-category-alist)))
 
-(defun gnus-agent-expire ()
-  "Expire all old articles."
+(defun gnus-agent-expire (&optional articles group force)
+  "Expire all old articles.
+If you want to force expiring of certain articles, this function can
+take ARTICLES, GROUP and FORCE parameters as well.  Setting ARTICLES
+and GROUP without FORCE is not supported."
   (interactive)
-  (let ((methods gnus-agent-covered-methods)
+  (let ((methods (if group
+                    (list (gnus-find-method-for-group group))
+                  gnus-agent-covered-methods))
        (day (if (numberp gnus-agent-expire-days)
                 (- (time-to-days (current-time)) gnus-agent-expire-days)
               nil))
        (current-day (time-to-days (current-time)))
-       gnus-command-method sym group articles
+       gnus-command-method sym arts pos
        history overview file histories elem art nov-file low info
        unreads marked article orig lowest highest found days)
     (save-excursion
@@ -1672,175 +1710,200 @@ The following commands are available:
             (setq gnus-agent-current-history
                   (setq history (gnus-agent-history-buffer))))
            (goto-char (point-min))
-           (when (> (buffer-size) 1)
-             (goto-char (point-min))
-             (while (not (eobp))
-               (skip-chars-forward "^\t")
-               (if (let ((fetch-date (read (current-buffer))))
-                     (if (numberp fetch-date)
-                         ;; We now have the arrival day, so we see
-                         ;; whether it's old enough to be expired.
-                         (if (numberp day)
-                             (> fetch-date day)
-                           (skip-chars-forward "\t")
-                           (setq found nil
-                                 days gnus-agent-expire-days)
-                           (while (and (not found)
-                                       days)
-                             (when (looking-at (caar days))
-                               (setq found (cadar days)))
-                             (pop days))
-                           (> fetch-date (- current-day found)))
-                       ;; History file is corrupted.
-                       (gnus-message
-                        5
-                        (format "File %s is corrupted!"
-                                (gnus-agent-lib-file "history")))
-                       (sit-for 1)
-                       ;; Ignore it
-                       t))
-                   ;; New article; we don't expire it.
-                   (forward-line 1)
-                 ;; Old article.  Schedule it for possible nuking.
-                 (while (not (eolp))
-                   (setq sym (let ((obarray expiry-hashtb) s)
-                               (setq s (read (current-buffer)))
-                               (if (stringp s) (intern s) s)))
-                   (if (boundp sym)
-                       (set sym (cons (cons (read (current-buffer)) (point))
-                                      (symbol-value sym)))
-                     (set sym (list (cons (read (current-buffer)) (point)))))
-                   (skip-chars-forward " "))
-                 (forward-line 1)))
-             ;; We now have all articles that can possibly be expired.
-             (mapatoms
-              (lambda (sym)
-                (setq group (symbol-name sym)
-                      articles (sort (symbol-value sym) 'car-less-than-car)
-                      low (car (gnus-active group))
-                      info (gnus-get-info group)
-                      unreads (ignore-errors
-                                (gnus-list-of-unread-articles group))
-                      marked (nconc
-                              (gnus-uncompress-range
-                               (cdr (assq 'tick (gnus-info-marks info))))
-                              (gnus-uncompress-range
-                               (cdr (assq 'dormant
-                                          (gnus-info-marks info)))))
-                      nov-file (gnus-agent-article-name ".overview" group)
-                      lowest nil
-                      highest nil)
-                (gnus-agent-load-alist group)
-                (gnus-message 5 "Expiring articles in %s" group)
-                (set-buffer overview)
-                (erase-buffer)
-                (when (file-exists-p nov-file)
-                  (nnheader-insert-file-contents nov-file))
-                (goto-char (point-min))
-                (setq article 0)
-                (while (setq elem (pop articles))
-                  (setq article (car elem))
-                  (when (or (null low)
-                            (< article low)
-                            gnus-agent-expire-all
-                            (and (not (memq article unreads))
-                                 (not (memq article marked))))
-                    ;; Find and nuke the NOV line.
-                    (while (and (not (eobp))
-                                (or (not (numberp
-                                          (setq art (read (current-buffer)))))
-                                    (< art article)))
-                      (if (and (numberp art)
-                               (file-exists-p
-                                (gnus-agent-article-name
-                                 (number-to-string art) group)))
-                          (progn
-                            (unless lowest
-                              (setq lowest art))
-                            (setq highest art)
-                            (forward-line 1))
-                        ;; Remove old NOV lines that have no articles.
-                        (gnus-delete-line)))
-                    (if (or (eobp)
-                            (/= art article))
-                        (beginning-of-line)
-                      (gnus-delete-line))
-                    ;; Nuke the article.
-                    (when (file-exists-p
-                           (setq file (gnus-agent-article-name
-                                       (number-to-string article)
-                                       group)))
-                      (delete-file file))
-                    ;; Schedule the history line for nuking.
-                    (push (cdr elem) histories)))
-                (gnus-make-directory (file-name-directory nov-file))
-                (let ((coding-system-for-write
-                       gnus-agent-file-coding-system))
-                  (write-region (point-min) (point-max) nov-file nil 'silent))
-                ;; Delete the unwanted entries in the alist.
-                (setq gnus-agent-article-alist
-                      (sort gnus-agent-article-alist 'car-less-than-car))
-                (let* ((alist gnus-agent-article-alist)
-                       (prev (cons nil alist))
-                       (first prev)
-                       expired)
-                  (while (and alist
-                              (<= (caar alist) article))
-                    (if (or (not (cdar alist))
-                            (not (file-exists-p
-                                  (gnus-agent-article-name
-                                   (number-to-string
-                                    (caar alist))
-                                   group))))
+           (if (and articles group force) ;; point usless without art+group
+               (while (setq article (pop articles))
+                 ;; try to find history entries for articles
+                 (goto-char (point-min))
+                 (if (re-search-forward 
+                      (concat "^[^\t]*\t[^\t]*\t\(.* ?\)"
+                              (format "%S" (gnus-group-prefixed-name
+                                            group gnus-command-method))
+                              " "
+                              (number-to-string article)
+                              " $")
+                      nil t)
+                     (setq pos (point))
+                   (setq pos nil))
+                 (setq sym (let ((obarray expiry-hashtb) s)
+                             (intern group)))
+                 (if (boundp sym)
+                     (set sym (cons (cons article pos)
+                                    (symbol-value sym)))
+                   (set sym (list (cons article pos)))))
+             ;; go through history file to find eligble articles
+             (when (> (buffer-size) 1)
+               (goto-char (point-min))
+               (while (not (eobp))
+                 (skip-chars-forward "^\t")
+                 (if (let ((fetch-date (read (current-buffer))))
+                       (if (numberp fetch-date)
+                           ;; We now have the arrival day, so we see
+                           ;; whether it's old enough to be expired.
+                           (if (numberp day)
+                               (> fetch-date day)
+                             (skip-chars-forward "\t")
+                             (setq found nil
+                                   days gnus-agent-expire-days)
+                             (while (and (not found)
+                                         days)
+                               (when (looking-at (caar days))
+                                 (setq found (cadar days)))
+                               (pop days))
+                             (> fetch-date (- current-day found)))
+                         ;; History file is corrupted.
+                         (gnus-message
+                          5
+                          (format "File %s is corrupted!"
+                                  (gnus-agent-lib-file "history")))
+                         (sit-for 1)
+                         ;; Ignore it
+                         t))
+                     ;; New article; we don't expire it.
+                     (forward-line 1)
+                   ;; Old article.  Schedule it for possible nuking.
+                   (while (not (eolp))
+                     (setq sym (let ((obarray expiry-hashtb) s)
+                                 (setq s (read (current-buffer)))
+                                 (if (stringp s) (intern s) s)))
+                     (if (boundp sym)
+                         (set sym (cons (cons (read (current-buffer)) (point))
+                                        (symbol-value sym)))
+                       (set sym (list (cons (read (current-buffer))
+                                            (point)))))
+                     (skip-chars-forward " "))
+                   (forward-line 1)))))
+           ;; We now have all articles that can possibly be expired.
+           (mapatoms
+            (lambda (sym)
+              (setq group (symbol-name sym)
+                    arts (sort (symbol-value sym) 'car-less-than-car)
+                    low (car (gnus-active group))
+                    info (gnus-get-info group)
+                    unreads (ignore-errors
+                              (gnus-list-of-unread-articles group))
+                    marked (nconc
+                            (gnus-uncompress-range
+                             (cdr (assq 'tick (gnus-info-marks info))))
+                            (gnus-uncompress-range
+                             (cdr (assq 'dormant
+                                        (gnus-info-marks info)))))
+                    nov-file (gnus-agent-article-name ".overview" group)
+                    lowest nil
+                    highest nil)
+              (gnus-agent-load-alist group)
+              (gnus-message 5 "Expiring articles in %s" group)
+              (set-buffer overview)
+              (erase-buffer)
+              (when (file-exists-p nov-file)
+                (nnheader-insert-file-contents nov-file))
+              (goto-char (point-min))
+              (setq article 0)
+              (while (setq elem (pop arts))
+                (setq article (car elem))
+                (when (or (null low)
+                          (< article low)
+                          gnus-agent-expire-all
+                          (and (not (memq article unreads))
+                               (not (memq article marked)))
+                          force)
+                  ;; Find and nuke the NOV line.
+                  (while (and (not (eobp))
+                              (or (not (numberp
+                                        (setq art (read (current-buffer)))))
+                                  (< art article)))
+                    (if (and (numberp art)
+                             (file-exists-p
+                              (gnus-agent-article-name
+                               (number-to-string art) group)))
                         (progn
-                          (push (caar alist) expired)
-                          (setcdr prev (setq alist (cdr alist))))
-                      (setq prev alist
-                            alist (cdr alist))))
-                  (setq gnus-agent-article-alist (cdr first))
-                  (gnus-agent-save-alist group)
-                  ;; Mark all articles up to the first article
-                  ;; in `gnus-article-alist' as read.
-                  (when (and info (caar gnus-agent-article-alist))
-                    (setcar (nthcdr 2 info)
-                            (gnus-range-add
-                             (nth 2 info)
-                             (cons 1 (- (caar gnus-agent-article-alist) 1)))))
-                  ;; Maybe everything has been expired from
-                  ;; `gnus-article-alist' and so the above marking as
-                  ;; read could not be conducted, or there are
-                  ;; expired article within the range of the alist.
-                  (when (and info
-                             expired
-                             (or (not (caar gnus-agent-article-alist))
-                                 (> (car expired)
-                                    (caar gnus-agent-article-alist))))
-                    (setcar (nthcdr 2 info)
-                            (gnus-add-to-range
-                             (nth 2 info)
-                             (nreverse expired))))
-                  (gnus-dribble-enter
-                   (concat "(gnus-group-set-info '"
-                           (gnus-prin1-to-string info)
-                           ")")))
-                (when lowest
-                  (if (gnus-gethash group orig)
-                      (setcar (gnus-gethash group orig) lowest)
-                    (gnus-sethash group (cons lowest highest) orig))))
-              expiry-hashtb)
-             (set-buffer history)
-             (setq histories (nreverse (sort histories '<)))
-             (while histories
-               (goto-char (pop histories))
-               (gnus-delete-line))
-             (gnus-agent-save-history)
-             (gnus-agent-close-history)
-             (gnus-write-active-file
-              (gnus-agent-lib-file "active") orig))
-           (gnus-message 4 "Expiry...done")))))))
+                          (unless lowest
+                            (setq lowest art))
+                          (setq highest art)
+                          (forward-line 1))
+                      ;; Remove old NOV lines that have no articles.
+                      (gnus-delete-line)))
+                  (if (or (eobp)
+                          (/= art article))
+                      (beginning-of-line)
+                    (gnus-delete-line))
+                  ;; Nuke the article.
+                  (when (file-exists-p
+                         (setq file (gnus-agent-article-name
+                                     (number-to-string article)
+                                     group)))
+                    (delete-file file))
+                  ;; Schedule the history line for nuking.
+                  (if (cdr elem)
+                      (push (cdr elem) histories))))
+              (gnus-make-directory (file-name-directory nov-file))
+              (let ((coding-system-for-write
+                     gnus-agent-file-coding-system))
+                (write-region (point-min) (point-max) nov-file nil 'silent))
+              ;; Delete the unwanted entries in the alist.
+              (setq gnus-agent-article-alist
+                    (sort gnus-agent-article-alist 'car-less-than-car))
+              (let* ((alist gnus-agent-article-alist)
+                     (prev (cons nil alist))
+                     (first prev)
+                     expired)
+                (while (and alist
+                            (<= (caar alist) article))
+                  (if (or (not (cdar alist))
+                          (not (file-exists-p
+                                (gnus-agent-article-name
+                                 (number-to-string
+                                  (caar alist))
+                                 group))))
+                      (progn
+                        (push (caar alist) expired)
+                        (setcdr prev (setq alist (cdr alist))))
+                    (setq prev alist
+                          alist (cdr alist))))
+                (setq gnus-agent-article-alist (cdr first))
+                (gnus-agent-save-alist group)
+                ;; Mark all articles up to the first article
+                ;; in `gnus-agent-article-alist' as read.
+                (when (and info (caar gnus-agent-article-alist))
+                  (setcar (nthcdr 2 info)
+                          (gnus-range-add
+                           (nth 2 info)
+                           (cons 1 (- (caar gnus-agent-article-alist) 1)))))
+                ;; Maybe everything has been expired from
+                ;; `gnus-agent-article-alist' and so the above marking as
+                ;; read could not be conducted, or there are
+                ;; expired article within the range of the alist.
+                (when (and info
+                           expired
+                           (or (not (caar gnus-agent-article-alist))
+                               (> (car expired)
+                                  (caar gnus-agent-article-alist))))
+                  (setcar (nthcdr 2 info)
+                          (gnus-add-to-range
+                           (nth 2 info)
+                           (nreverse expired))))
+                (gnus-dribble-enter
+                 (concat "(gnus-group-set-info '"
+                         (gnus-prin1-to-string info)
+                         ")")))
+              (when lowest
+                (if (gnus-gethash group orig)
+                    (setcar (gnus-gethash group orig) lowest)
+                  (gnus-sethash group (cons lowest highest) orig))))
+            expiry-hashtb)
+           (set-buffer history)
+           (setq histories (nreverse (sort histories '<)))
+           (while histories
+             (goto-char (pop histories))
+             (gnus-delete-line))
+           (gnus-agent-save-history)
+           (gnus-agent-close-history)
+           (gnus-write-active-file
+            (gnus-agent-lib-file "active") orig))
+         (gnus-message 4 "Expiry...done"))))))
 
 ;;;###autoload
 (defun gnus-agent-batch ()
+  "Start Gnus, send queue and fetch session."
   (interactive)
   (let ((init-file-user "")
        (gnus-always-read-dribble-file t))
@@ -1869,14 +1932,14 @@ The following commands are available:
              (push (read (current-buffer)) cached-articles))
            (forward-line 1))
          (setq cached-articles (nreverse cached-articles))))
-      (if (setq uncached-articles 
+      (if (setq uncached-articles
                (gnus-sorted-difference articles cached-articles))
          (progn
            (set-buffer nntp-server-buffer)
            (erase-buffer)
            (let (gnus-agent-cache)
-             (unless (eq 'nov 
-                         (gnus-retrieve-headers 
+             (unless (eq 'nov
+                         (gnus-retrieve-headers
                           uncached-articles group fetch-old))
                (nnvirtual-convert-headers)))
            (set-buffer gnus-agent-overview-buffer)
@@ -1945,7 +2008,7 @@ The following commands are available:
          (let ((nnheader-file-coding-system
                 gnus-agent-file-coding-system))
            (nnheader-insert-file-contents file)))
-      (goto-char (point-min)) 
+      (goto-char (point-min))
       (while (not (eobp))
        (while (not (or (eobp) (looking-at "[0-9]")))
          (setq point (point))
@@ -1958,7 +2021,7 @@ The following commands are available:
            (while (and arts (> n (car arts)))
              (message "Regenerating NOV %s %d..." group (car arts))
              (mm-with-unibyte-buffer
-               (nnheader-insert-file-contents 
+               (nnheader-insert-file-contents
                 (concat dir (number-to-string (car arts))))
                (goto-char (point-min))
                (if (search-forward "\n\n" nil t)
@@ -1983,15 +2046,15 @@ The following commands are available:
     (unless clean
       (gnus-agent-load-alist group))
     (setq alist (sort alist 'car-less-than-car))
-    (setq gnus-agent-article-alist (sort gnus-agent-article-alist 
+    (setq gnus-agent-article-alist (sort gnus-agent-article-alist
                                         'car-less-than-car))
     (while (and alist gnus-agent-article-alist)
-      (cond 
+      (cond
        ((< (caar alist) (caar gnus-agent-article-alist))
        (push (pop alist) new-alist))
        ((> (caar alist) (caar gnus-agent-article-alist))
        (push (list (car (pop gnus-agent-article-alist))) new-alist))
-       (t 
+       (t
        (pop gnus-agent-article-alist)
        (while (and gnus-agent-article-alist
                    (= (caar alist) (caar gnus-agent-article-alist)))
@@ -2015,8 +2078,8 @@ The following commands are available:
       (if (not (re-search-forward "^Message-ID: *<\\([^>\n]+\\)>" nil t))
          (setq id "No-Message-ID-in-article")
        (setq id (buffer-substring (match-beginning 1) (match-end 1))))
-      (gnus-agent-enter-history 
-       id (list (cons group article)) 
+      (gnus-agent-enter-history
+       id (list (cons group article))
        (time-to-days (nth 5 (file-attributes file)))))))
 
 ;;;###autoload
@@ -2027,7 +2090,7 @@ If CLEAN, don't read existing active and agentview files."
   (message "Regenerating Gnus agent files...")
   (dolist (gnus-command-method gnus-agent-covered-methods)
     (let ((active-file (gnus-agent-lib-file "active"))
-         history-hashtb active-hashtb active-changed 
+         history-hashtb active-hashtb active-changed
          history-changed point)
       (gnus-make-directory (file-name-directory active-file))
       (if clean
@@ -2049,12 +2112,12 @@ If CLEAN, don't read existing active and agentview files."
        (goto-char (point-min))
        (forward-line 1)
        (while (not (eobp))
-         (if (looking-at 
+         (if (looking-at
               "\\([^\t\n]+\\)\t[0-9]+\t\\([^ \n]+\\) \\([0-9]+\\)")
              (progn
-               (unless (string= (match-string 1) 
+               (unless (string= (match-string 1)
                                 "last-header-fetched-for-session")
-                 (gnus-sethash (match-string 2) 
+                 (gnus-sethash (match-string 2)
                                (cons (string-to-number (match-string 3))
                                      (gnus-gethash-safe (match-string 2)
                                                         history-hashtb))
@@ -2085,14 +2148,14 @@ If CLEAN, don't read existing active and agentview files."
              n)
          (gnus-sethash group arts history-hashtb)
          (while (and arts gnus-agent-article-alist)
-           (cond 
+           (cond
             ((> (car arts) (caar gnus-agent-article-alist))
              (when (cdar gnus-agent-article-alist)
-               (gnus-agent-regenerate-history 
+               (gnus-agent-regenerate-history
                 group (caar gnus-agent-article-alist))
                (setq history-changed t))
              (setq n (car (pop gnus-agent-article-alist)))
-             (while (and gnus-agent-article-alist 
+             (while (and gnus-agent-article-alist
                          (= n (caar gnus-agent-article-alist)))
                (pop gnus-agent-article-alist)))
             ((< (car arts) (caar gnus-agent-article-alist))
@@ -2101,7 +2164,7 @@ If CLEAN, don't read existing active and agentview files."
                (pop arts)))
             (t
              (setq n (car (pop gnus-agent-article-alist)))
-             (while (and gnus-agent-article-alist 
+             (while (and gnus-agent-article-alist
                          (= n (caar gnus-agent-article-alist)))
                (pop gnus-agent-article-alist))
              (setq n (pop arts))
@@ -2109,18 +2172,18 @@ If CLEAN, don't read existing active and agentview files."
                (pop arts)))))
          (while gnus-agent-article-alist
            (when (cdar gnus-agent-article-alist)
-             (gnus-agent-regenerate-history 
+             (gnus-agent-regenerate-history
               group (caar gnus-agent-article-alist))
              (setq history-changed t))
            (pop gnus-agent-article-alist))))
       (when history-changed
-       (message "Regenerate the history file of %s:%s" 
+       (message "Regenerate the history file of %s:%s"
                 (car gnus-command-method)
                 (cadr gnus-command-method))
        (gnus-agent-save-history))
       (gnus-agent-close-history)
       (when active-changed
-       (message "Regenerate %s" active-file) 
+       (message "Regenerate %s" active-file)
        (let ((nnmail-active-file-coding-system gnus-agent-file-coding-system))
          (gnus-write-active-file active-file active-hashtb)))))
   (message "Regenerating Gnus agent files...done"))
@@ -2130,8 +2193,8 @@ If CLEAN, don't read existing active and agentview files."
   (interactive (list t))
   (dolist (server gnus-opened-servers)
     (when (eq (nth 1 server) 'offline)
-      (if (if (eq force 'ask) 
-             (gnus-y-or-n-p 
+      (if (if (eq force 'ask)
+             (gnus-y-or-n-p
               (format "Switch %s:%s into online status? "
                       (caar server) (cadar server)))
            force)