;;; gnus-cache.el --- cache interface for Gnus
-;; Copyright (C) 1995,96 Free Software Foundation, Inc.
+;; Copyright (C) 1995,96,97 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
;; Keywords: news
;;; Code:
-(require 'gnus-load)
+(require 'gnus)
(require 'gnus-int)
(require 'gnus-range)
-(require 'gnus-sum)
(require 'gnus-start)
-(require 'gnus)
+(eval-when-compile
+ (require 'gnus-sum))
+
+(defgroup gnus-cache nil
+ "Cache interface."
+ :group 'gnus)
-(defvar gnus-cache-directory
+(defcustom gnus-cache-directory
(nnheader-concat gnus-directory "cache/")
- "*The directory where cached articles will be stored.")
+ "*The directory where cached articles will be stored."
+ :group 'gnus-cache
+ :type 'directory)
-(defvar gnus-cache-active-file
+(defcustom gnus-cache-active-file
(concat (file-name-as-directory gnus-cache-directory) "active")
- "*The cache active file.")
+ "*The cache active file."
+ :group 'gnus-cache
+ :type 'file)
-(defvar gnus-cache-enter-articles '(ticked dormant)
- "*Classes of articles to enter into the cache.")
+(defcustom gnus-cache-enter-articles '(ticked dormant)
+ "Classes of articles to enter into the cache."
+ :group 'gnus-cache
+ :type '(set (const ticked) (const dormant) (const unread) (const read)))
-(defvar gnus-cache-remove-articles '(read)
- "*Classes of articles to remove from the cache.")
+(defcustom gnus-cache-remove-articles '(read)
+ "Classes of articles to remove from the cache."
+ :group 'gnus-cache
+ :type '(set (const ticked) (const dormant) (const unread) (const read)))
-(defvar gnus-uncacheable-groups nil
+(defcustom gnus-uncacheable-groups nil
"*Groups that match this regexp will not be cached.
If you want to avoid caching your nnml groups, you could set this
-variable to \"^nnml\".")
+variable to \"^nnml\"."
+ :group 'gnus-cache
+ :type '(choice (const :tag "off" nil)
+ regexp))
\f
(not (eq gnus-use-cache 'passive))))
(gnus-cache-read-active)))
-(condition-case ()
- (gnus-add-shutdown 'gnus-cache-close 'gnus)
- ;; Complexities of byte-compiling makes this kludge necessary. Eeek.
- (error nil))
+;; Complexities of byte-compiling make this kludge necessary. Eeek.
+(ignore-errors
+ (gnus-add-shutdown 'gnus-cache-close 'gnus))
(defun gnus-cache-close ()
"Shut down the cache."
(defun gnus-cache-save-buffers ()
;; save the overview buffer if it exists and has been modified
;; delete empty cache subdirectories
- (if (null gnus-cache-buffer)
- ()
+ (when gnus-cache-buffer
(let ((buffer (cdr gnus-cache-buffer))
(overview-file (gnus-cache-file-name
(car gnus-cache-buffer) ".overview")))
;; write the overview only if it was modified
- (if (buffer-modified-p buffer)
- (save-excursion
- (set-buffer buffer)
- (if (> (buffer-size) 0)
- ;; non-empty overview, write it out
- (progn
- (unless (file-exists-p (file-name-directory overview-file))
- (make-directory (file-name-directory overview-file) t))
- (write-region (point-min) (point-max)
- overview-file nil 'quietly))
- ;; empty overview file, remove it
- (and (file-exists-p overview-file)
- (delete-file overview-file))
- ;; if possible, remove group's cache subdirectory
- (condition-case nil
- ;; FIXME: we can detect the error type and warn the user
- ;; of any inconsistencies (articles w/o nov entries?).
- ;; for now, just be conservative...delete only if safe -- sj
- (delete-directory (file-name-directory overview-file))
- (error nil)))))
- ;; kill the buffer, it's either unmodified or saved
+ (when (buffer-modified-p buffer)
+ (save-excursion
+ (set-buffer buffer)
+ (if (> (buffer-size) 0)
+ ;; Non-empty overview, write it to a file.
+ (gnus-write-buffer overview-file)
+ ;; Empty overview file, remove it
+ (when (file-exists-p overview-file)
+ (delete-file overview-file))
+ ;; If possible, remove group's cache subdirectory.
+ (condition-case nil
+ ;; FIXME: we can detect the error type and warn the user
+ ;; of any inconsistencies (articles w/o nov entries?).
+ ;; for now, just be conservative...delete only if safe -- sj
+ (delete-directory (file-name-directory overview-file))
+ (error nil)))))
+ ;; Kill the buffer -- it's either unmodified or saved.
(gnus-kill-buffer buffer)
(setq gnus-cache-buffer nil))))
-(defun gnus-cache-possibly-enter-article
+(defun gnus-cache-possibly-enter-article
(group article headers ticked dormant unread &optional force)
(when (and (or force (not (eq gnus-use-cache 'passive)))
(numberp article)
(> article 0)
- (vectorp headers)) ; This might be a dummy article.
+ (vectorp headers)) ; This might be a dummy article.
;; If this is a virtual group, we find the real group.
(when (gnus-virtual-group-p group)
- (let ((result (nnvirtual-find-group-art
+ (let ((result (nnvirtual-find-group-art
(gnus-group-real-name group) article)))
(setq group (car result)
headers (copy-sequence headers))
(mail-header-set-number headers (cdr result))))
(let ((number (mail-header-number headers))
file dir)
- (when (and (> number 0) ; Reffed article.
- (or (not gnus-uncacheable-groups)
- (not (string-match gnus-uncacheable-groups group)))
+ (when (and number
+ (> number 0) ; Reffed article.
(or force
- (gnus-cache-member-of-class
- gnus-cache-enter-articles ticked dormant unread))
+ (and (or (not gnus-uncacheable-groups)
+ (not (string-match
+ gnus-uncacheable-groups group)))
+ (gnus-cache-member-of-class
+ gnus-cache-enter-articles ticked dormant unread)))
(not (file-exists-p (setq file (gnus-cache-file-name
group number)))))
;; Possibly create the cache directory.
- (or (file-exists-p (setq dir (file-name-directory file)))
- (make-directory dir t))
+ (gnus-make-directory (setq dir (file-name-directory file)))
;; Save the article in the cache.
(if (file-exists-p file)
t ; The article already is saved.
(let ((gnus-use-cache nil))
(gnus-request-article-this-buffer number group))
(when (> (buffer-size) 0)
- (write-region (point-min) (point-max) file nil 'quiet)
+ (gnus-write-buffer file)
(gnus-cache-change-buffer group)
(set-buffer (cdr gnus-cache-buffer))
(goto-char (point-max))
(forward-line -1)
(while (condition-case ()
- (and (not (bobp))
- (> (read (current-buffer)) number))
+ (when (not (bobp))
+ (> (read (current-buffer)) number))
(error
;; The line was malformed, so we just remove it!!
(gnus-delete-line)
t))
(forward-line -1))
- (if (bobp)
+ (if (bobp)
(if (not (eobp))
(progn
(beginning-of-line)
- (if (< (read (current-buffer)) number)
- (forward-line 1)))
+ (when (< (read (current-buffer)) number)
+ (forward-line 1)))
(beginning-of-line))
(forward-line 1))
(beginning-of-line)
article)
(gnus-cache-change-buffer gnus-newsgroup-name)
(while articles
- (if (memq (setq article (pop articles)) cache-articles)
- ;; The article was in the cache, so we see whether we are
- ;; supposed to remove it from the cache.
- (gnus-cache-possibly-remove-article
- article (memq article gnus-newsgroup-marked)
- (memq article gnus-newsgroup-dormant)
- (or (memq article gnus-newsgroup-unreads)
- (memq article gnus-newsgroup-unselected))))))
+ (when (memq (setq article (pop articles)) cache-articles)
+ ;; The article was in the cache, so we see whether we are
+ ;; supposed to remove it from the cache.
+ (gnus-cache-possibly-remove-article
+ article (memq article gnus-newsgroup-marked)
+ (memq article gnus-newsgroup-dormant)
+ (or (memq article gnus-newsgroup-unreads)
+ (memq article gnus-newsgroup-unselected))))))
;; The overview file might have been modified, save it
;; safe because we're only called at group exit anyway.
(gnus-cache-save-buffers)))
"Alter the ACTIVE info for GROUP to reflect the articles in the cache."
(when gnus-cache-active-hashtb
(let ((cache-active (gnus-gethash group gnus-cache-active-hashtb)))
- (and cache-active
- (< (car cache-active) (car active))
- (setcar active (car cache-active)))
- (and cache-active
- (> (cdr cache-active) (cdr active))
- (setcdr active (cdr cache-active))))))
+ (when cache-active
+ (when (< (car cache-active) (car active))
+ (setcar active (car cache-active)))
+ (when (> (cdr cache-active) (cdr active))
+ (setcdr active (cdr cache-active)))))))
(defun gnus-cache-retrieve-headers (articles group &optional fetch-old)
"Retrieve the headers for ARTICLES in GROUP."
- (let ((cached
+ (let ((cached
(setq gnus-newsgroup-cached (gnus-cache-articles-in-group group))))
(if (not cached)
;; No cached articles here, so we just retrieve them
articles))
(cache-file (gnus-cache-file-name group ".overview"))
type)
- ;; We first retrieve all the headers that we don't have in
+ ;; We first retrieve all the headers that we don't have in
;; the cache.
(let ((gnus-use-cache nil))
(when uncached-articles
- (setq type (and articles
- (gnus-retrieve-headers
+ (setq type (and articles
+ (gnus-retrieve-headers
uncached-articles group fetch-old)))))
(gnus-cache-save-buffers)
;; Then we insert the cached headers.
;; There are no cached headers.
type)
((null type)
- ;; There were no uncached headers (or retrieval was
+ ;; There were no uncached headers (or retrieval was
;; unsuccessful), so we use the cached headers exclusively.
(set-buffer nntp-server-buffer)
(erase-buffer)
(gnus-set-global-variables)
(let ((articles (gnus-summary-work-articles n))
article out)
- (while articles
- (setq article (pop articles))
- (when (gnus-cache-possibly-enter-article
- gnus-newsgroup-name article (gnus-summary-article-header article)
- nil nil nil t)
- (push article out))
+ (while (setq article (pop articles))
+ (if (natnump article)
+ (when (gnus-cache-possibly-enter-article
+ gnus-newsgroup-name article
+ (gnus-summary-article-header article)
+ nil nil nil t)
+ (push article out))
+ (gnus-message 2 "Can't cache article %d" article))
(gnus-summary-remove-process-mark article)
(gnus-summary-update-secondary-mark article))
(gnus-summary-next-subject 1)
"Say whether ARTICLE is cached in the current group."
(memq article gnus-newsgroup-cached))
+(defun gnus-summary-insert-cached-articles ()
+ "Insert all the articles cached for this group into the current buffer."
+ (interactive)
+ (let ((cached gnus-newsgroup-cached)
+ (gnus-verbose (max 6 gnus-verbose)))
+ (unless cached
+ (error "No cached articles for this group"))
+ (while cached
+ (gnus-summary-goto-subject (pop cached) t))))
+
;;; Internal functions.
(defun gnus-cache-change-buffer (group)
;; Another overview cache is current, save it.
(gnus-cache-save-buffers)))
;; if gnus-cache buffer is nil, create it
- (or gnus-cache-buffer
- ;; Create cache buffer
- (save-excursion
- (setq gnus-cache-buffer
- (cons group
- (set-buffer (get-buffer-create " *gnus-cache-overview*"))))
- (buffer-disable-undo (current-buffer))
- ;; Insert the contents of this group's cache overview.
- (erase-buffer)
- (let ((file (gnus-cache-file-name group ".overview")))
- (and (file-exists-p file)
- (insert-file-contents file)))
- ;; We have a fresh (empty/just loaded) buffer,
- ;; mark it as unmodified to save a redundant write later.
- (set-buffer-modified-p nil))))
+ (unless gnus-cache-buffer
+ ;; Create cache buffer
+ (save-excursion
+ (setq gnus-cache-buffer
+ (cons group
+ (set-buffer (get-buffer-create " *gnus-cache-overview*"))))
+ (buffer-disable-undo (current-buffer))
+ ;; Insert the contents of this group's cache overview.
+ (erase-buffer)
+ (let ((file (gnus-cache-file-name group ".overview")))
+ (when (file-exists-p file)
+ (nnheader-insert-file-contents file)))
+ ;; We have a fresh (empty/just loaded) buffer,
+ ;; mark it as unmodified to save a redundant write later.
+ (set-buffer-modified-p nil))))
;; Return whether an article is a member of a class.
(defun gnus-cache-member-of-class (class ticked dormant unread)
(defun gnus-cache-file-name (group article)
(concat (file-name-as-directory gnus-cache-directory)
(file-name-as-directory
- (if (gnus-use-long-file-name 'not-cache)
- group
- (let ((group (nnheader-replace-chars-in-string group ?/ ?_)))
- ;; Translate the first colon into a slash.
- (when (string-match ":" group)
- (aset group (match-beginning 0) ?/))
- (nnheader-replace-chars-in-string group ?. ?/))))
+ (nnheader-translate-file-chars
+ (if (gnus-use-long-file-name 'not-cache)
+ group
+ (let ((group (nnheader-replace-chars-in-string group ?/ ?_)))
+ ;; Translate the first colon into a slash.
+ (when (string-match ":" group)
+ (aset group (match-beginning 0) ?/))
+ (nnheader-replace-chars-in-string group ?. ?/)))))
(if (stringp article) article (int-to-string article))))
(defun gnus-cache-update-article (group article)
"If ARTICLE is in the cache, remove it and re-enter it."
(when (gnus-cache-possibly-remove-article article nil nil nil t)
(let ((gnus-use-cache nil))
- (gnus-cache-possibly-enter-article
+ (gnus-cache-possibly-enter-article
gnus-newsgroup-name article (gnus-summary-article-header article)
nil nil nil t))))
-(defun gnus-cache-possibly-remove-article (article ticked dormant unread
+(defun gnus-cache-possibly-remove-article (article ticked dormant unread
&optional force)
"Possibly remove ARTICLE from the cache."
(let ((group gnus-newsgroup-name)
file)
;; If this is a virtual group, we find the real group.
(when (gnus-virtual-group-p group)
- (let ((result (nnvirtual-find-group-art
+ (let ((result (nnvirtual-find-group-art
(gnus-group-real-name group) article)))
(setq group (car result)
number (cdr result))))
(delete-file file)
(set-buffer (cdr gnus-cache-buffer))
(goto-char (point-min))
- (if (or (looking-at (concat (int-to-string number) "\t"))
- (search-forward (concat "\n" (int-to-string number) "\t")
- (point-max) t))
- (delete-region (progn (beginning-of-line) (point))
- (progn (forward-line 1) (point)))))
+ (when (or (looking-at (concat (int-to-string number) "\t"))
+ (search-forward (concat "\n" (int-to-string number) "\t")
+ (point-max) t))
+ (delete-region (progn (beginning-of-line) (point))
+ (progn (forward-line 1) (point)))))
(setq gnus-newsgroup-cached
(delq article gnus-newsgroup-cached))
(gnus-summary-update-secondary-mark article)
(let ((dir (file-name-directory (gnus-cache-file-name group 1)))
articles)
(when (file-exists-p dir)
- (sort (mapcar (lambda (name) (string-to-int name))
- (directory-files dir nil "^[0-9]+$" t))
- '<))))
+ (setq articles
+ (sort (mapcar (lambda (name) (string-to-int name))
+ (directory-files dir nil "^[0-9]+$" t))
+ '<))
+ ;; Update the cache active file, just to synch more.
+ (when articles
+ (gnus-cache-update-active group (car articles) t)
+ (gnus-cache-update-active group (car (last articles))))
+ articles)))
(defun gnus-cache-braid-nov (group cached)
(let ((cache-buf (get-buffer-create " *gnus-cache*"))
(setq beg (progn (beginning-of-line) (point))
end (progn (end-of-line) (point)))
(setq beg nil)))
- (if beg (progn (insert-buffer-substring cache-buf beg end)
- (insert "\n")))
+ (when beg
+ (insert-buffer-substring cache-buf beg end)
+ (insert "\n"))
(setq cached (cdr cached)))
(kill-buffer cache-buf)))
;;;###autoload
(defun gnus-jog-cache ()
- "Go through all groups and put the articles into the cache."
+ "Go through all groups and put the articles into the cache.
+
+Usage:
+$ emacs -batch -l ~/.emacs -l gnus -f gnus-jog-cache"
(interactive)
(let ((gnus-mark-article-hook nil)
(gnus-expert-user t)
(gnus)
;; Go through all groups...
(gnus-group-mark-buffer)
- (gnus-group-universal-argument
- nil nil
+ (gnus-group-universal-argument
+ nil nil
(lambda ()
- (gnus-summary-read-group nil nil t)
+ (interactive)
+ (gnus-summary-read-group (gnus-group-group-name) nil t)
;; ... and enter the articles into the cache.
(when (eq major-mode 'gnus-summary-mode)
(gnus-uu-mark-buffer)
(defun gnus-cache-read-active (&optional force)
"Read the cache active file."
- (unless (file-exists-p gnus-cache-directory)
- (make-directory gnus-cache-directory t))
- (if (not (and (file-exists-p gnus-cache-active-file)
- (or force (not gnus-cache-active-hashtb))))
+ (gnus-make-directory gnus-cache-directory)
+ (if (or (not (file-exists-p gnus-cache-active-file))
+ force)
;; There is no active file, so we generate one.
(gnus-cache-generate-active)
;; We simply read the active file.
(gnus-set-work-buffer)
(insert-file-contents gnus-cache-active-file)
(gnus-active-to-gnus-format
- nil (setq gnus-cache-active-hashtb
- (gnus-make-hashtable
+ nil (setq gnus-cache-active-hashtb
+ (gnus-make-hashtable
(count-lines (point-min) (point-max)))))
(setq gnus-cache-active-altered nil))))
-
+
(defun gnus-cache-write-active (&optional force)
"Write the active hashtb to the active file."
(when (or force
(and gnus-cache-active-hashtb
gnus-cache-active-altered))
- (save-excursion
- (gnus-set-work-buffer)
+ (nnheader-temp-write gnus-cache-active-file
(mapatoms
(lambda (sym)
(when (and sym (boundp sym))
(insert (format "%s %d %d y\n"
(symbol-name sym) (cdr (symbol-value sym))
(car (symbol-value sym))))))
- gnus-cache-active-hashtb)
- (make-directory (file-name-directory gnus-cache-active-file) t)
- (write-region
- (point-min) (point-max) gnus-cache-active-file nil 'silent))
+ gnus-cache-active-hashtb))
;; Mark the active hashtb as unaltered.
(setq gnus-cache-active-altered nil)))
;; Update the lower or upper bound.
(if low
(setcar active number)
- (setcdr active number))
- ;; Mark the active hashtb as altered.
- (setq gnus-cache-active-altered t))))
+ (setcdr active number)))
+ ;; Mark the active hashtb as altered.
+ (setq gnus-cache-active-altered t)))
;;;###autoload
(defun gnus-cache-generate-active (&optional directory)
(let* ((top (null directory))
(directory (expand-file-name (or directory gnus-cache-directory)))
(files (directory-files directory 'full))
- (group
+ (group
(if top
""
- (string-match
+ (string-match
(concat "^" (file-name-as-directory
(expand-file-name gnus-cache-directory)))
(directory-file-name directory))
- (nnheader-replace-chars-in-string
+ (nnheader-replace-chars-in-string
(substring (directory-file-name directory) (match-end 0))
?/ ?.)))
nums alphs)
(let ((nnml-generate-active-function 'identity))
(nnml-generate-nov-databases-1 dir)))
+(defun gnus-cache-move-cache (dir)
+ "Move the cache tree to somewhere else."
+ (interactive "FMove the cache tree to: ")
+ (rename-file gnus-cache-directory dir))
+
(provide 'gnus-cache)
-
+
;;; gnus-cache.el ends here
projects / gnus / blobdiff