;;; tramp-cache.el --- file information caching for Tramp
-;; Copyright (C) 2000, 2005-2012 Free Software Foundation, Inc.
+;; Copyright (C) 2000, 2005-2013 Free Software Foundation, Inc.
;; Author: Daniel Pittman <daniel@inanna.danann.net>
;; Michael Albinus <michael.albinus@gmx.de>
(defvar tramp-cache-data (make-hash-table :test 'equal)
"Hash table for remote files properties.")
+;;;###tramp-autoload
+(defcustom tramp-connection-properties nil
+ "List of static connection properties.
+Every entry has the form (REGEXP PROPERTY VALUE). The regexp
+matches remote file names. It can be nil. PROPERTY is a string,
+and VALUE the corresponding value. They are used, if there is no
+matching entry in for PROPERTY in `tramp-cache-data'."
+ :group 'tramp
+ :version "24.4"
+ :type '(repeat (list (choice :tag "File Name regexp" regexp (const nil))
+ (choice :tag " Property" string)
+ (choice :tag " Value" sexp))))
+
(defcustom tramp-persistency-file-name
(cond
;; GNU Emacs.
(defvar tramp-cache-data-changed nil
"Whether persistent cache data have been changed.")
+(defun tramp-get-hash-table (key)
+ "Returns the hash table for KEY.
+If it doesn't exist yet, it is created and initialized with
+matching entries of `tramp-connection-properties'."
+ (or (gethash key tramp-cache-data)
+ (let ((hash
+ (puthash key (make-hash-table :test 'equal) tramp-cache-data)))
+ (when (vectorp key)
+ (dolist (elt tramp-connection-properties)
+ (when (string-match
+ (or (nth 0 elt) "")
+ (tramp-make-tramp-file-name
+ (aref key 0) (aref key 1) (aref key 2) nil))
+ (tramp-set-connection-property key (nth 1 elt) (nth 2 elt)))))
+ hash)))
+
;;;###tramp-autoload
-(defun tramp-get-file-property (vec file property default)
- "Get the PROPERTY of FILE from the cache context of VEC.
+(defun tramp-get-file-property (key file property default)
+ "Get the PROPERTY of FILE from the cache context of KEY.
Returns DEFAULT if not set."
;; Unify localname.
- (setq vec (copy-sequence vec))
- (aset vec 3 (tramp-run-real-handler 'directory-file-name (list file)))
- (let* ((hash (or (gethash vec tramp-cache-data)
- (puthash vec (make-hash-table :test 'equal)
- tramp-cache-data)))
+ (setq key (copy-sequence key))
+ (aset key 3 (tramp-run-real-handler 'directory-file-name (list file)))
+ (let* ((hash (tramp-get-hash-table key))
(value (when (hash-table-p hash) (gethash property hash))))
(if
;; We take the value only if there is any, and
(setq value (cdr value))
(setq value default))
- (tramp-message vec 8 "%s %s %s" file property value)
+ (tramp-message key 8 "%s %s %s" file property value)
(when (>= tramp-verbose 10)
(let* ((var (intern (concat "tramp-cache-get-count-" property)))
(val (or (ignore-errors (symbol-value var)) 0)))
value))
;;;###tramp-autoload
-(defun tramp-set-file-property (vec file property value)
- "Set the PROPERTY of FILE to VALUE, in the cache context of VEC.
+(defun tramp-set-file-property (key file property value)
+ "Set the PROPERTY of FILE to VALUE, in the cache context of KEY.
Returns VALUE."
;; Unify localname.
- (setq vec (copy-sequence vec))
- (aset vec 3 (tramp-run-real-handler 'directory-file-name (list file)))
- (let ((hash (or (gethash vec tramp-cache-data)
- (puthash vec (make-hash-table :test 'equal)
- tramp-cache-data))))
+ (setq key (copy-sequence key))
+ (aset key 3 (tramp-run-real-handler 'directory-file-name (list file)))
+ (let ((hash (tramp-get-hash-table key)))
;; We put the timestamp there.
(puthash property (cons (current-time) value) hash)
- (tramp-message vec 8 "%s %s %s" file property value)
+ (tramp-message key 8 "%s %s %s" file property value)
(when (>= tramp-verbose 10)
(let* ((var (intern (concat "tramp-cache-set-count-" property)))
(val (or (ignore-errors (symbol-value var)) 0)))
value))
;;;###tramp-autoload
-(defmacro with-file-property (vec file property &rest body)
- "Check in Tramp cache for PROPERTY, otherwise execute BODY and set cache.
-FILE must be a local file name on a connection identified via VEC."
- `(if (file-name-absolute-p ,file)
- (let ((value (tramp-get-file-property ,vec ,file ,property 'undef)))
- (when (eq value 'undef)
- ;; We cannot pass @body as parameter to
- ;; `tramp-set-file-property' because it mangles our
- ;; debug messages.
- (setq value (progn ,@body))
- (tramp-set-file-property ,vec ,file ,property value))
- value)
- ,@body))
-
-;;;###tramp-autoload
-(put 'with-file-property 'lisp-indent-function 3)
-(put 'with-file-property 'edebug-form-spec t)
-(tramp-compat-font-lock-add-keywords
- 'emacs-lisp-mode '("\\<with-file-property\\>"))
-
-;;;###tramp-autoload
-(defun tramp-flush-file-property (vec file)
- "Remove all properties of FILE in the cache context of VEC."
+(defun tramp-flush-file-property (key file)
+ "Remove all properties of FILE in the cache context of KEY."
;; Remove file property of symlinks.
- (let ((truename (tramp-get-file-property vec file "file-truename" nil)))
+ (let ((truename (tramp-get-file-property key file "file-truename" nil)))
(when (and (stringp truename)
(not (string-equal file truename)))
- (tramp-flush-file-property vec truename)))
+ (tramp-flush-file-property key truename)))
;; Unify localname.
- (setq vec (copy-sequence vec))
- (aset vec 3 (tramp-run-real-handler 'directory-file-name (list file)))
- (tramp-message vec 8 "%s" file)
- (remhash vec tramp-cache-data))
+ (setq key (copy-sequence key))
+ (aset key 3 (tramp-run-real-handler 'directory-file-name (list file)))
+ (tramp-message key 8 "%s" file)
+ (remhash key tramp-cache-data))
;;;###tramp-autoload
-(defun tramp-flush-directory-property (vec directory)
- "Remove all properties of DIRECTORY in the cache context of VEC.
+(defun tramp-flush-directory-property (key directory)
+ "Remove all properties of DIRECTORY in the cache context of KEY.
Remove also properties of all files in subdirectories."
(let ((directory (tramp-run-real-handler
'directory-file-name (list directory))))
- (tramp-message vec 8 "%s" directory)
+ (tramp-message key 8 "%s" directory)
(maphash
(lambda (key value)
(when (and (stringp (tramp-file-name-localname key))
(when (vectorp key)
(setq key (copy-sequence key))
(aset key 3 nil))
- (let* ((hash (gethash key tramp-cache-data))
+ (let* ((hash (tramp-get-hash-table key))
(value (if (hash-table-p hash)
(gethash property hash default)
default)))
(when (vectorp key)
(setq key (copy-sequence key))
(aset key 3 nil))
- (let ((hash (or (gethash key tramp-cache-data)
- (puthash key (make-hash-table :test 'equal)
- tramp-cache-data))))
+ (let ((hash (tramp-get-hash-table key)))
(puthash property value hash)
(setq tramp-cache-data-changed t)
(tramp-message key 7 "%s %s" property value)
value))
;;;###tramp-autoload
-(defmacro with-connection-property (key property &rest body)
- "Check in Tramp for property PROPERTY, otherwise executes BODY and set."
- `(let ((value (tramp-get-connection-property ,key ,property 'undef)))
- (when (eq value 'undef)
- ;; We cannot pass ,@body as parameter to
- ;; `tramp-set-connection-property' because it mangles our debug
- ;; messages.
- (setq value (progn ,@body))
- (tramp-set-connection-property ,key ,property value))
- value))
-
-;;;###tramp-autoload
-(put 'with-connection-property 'lisp-indent-function 2)
-(put 'with-connection-property 'edebug-form-spec t)
-(tramp-compat-font-lock-add-keywords
- 'emacs-lisp-mode '("\\<with-connection-property\\>"))
+(defun tramp-connection-property-p (key property)
+ "Check whether named PROPERTY of a connection is defined.
+KEY identifies the connection, it is either a process or a vector."
+ (not (eq (tramp-get-connection-property key property 'undef) 'undef)))
;;;###tramp-autoload
(defun tramp-flush-connection-property (key)
key 7 "%s %s" key
(let ((hash (gethash key tramp-cache-data))
properties)
- (if (hash-table-p hash)
- (maphash
- (lambda (x y) (add-to-list 'properties x 'append))
- (gethash key tramp-cache-data)))
+ (when (hash-table-p hash)
+ (maphash (lambda (x y) (add-to-list 'properties x 'append)) hash))
properties))
(setq tramp-cache-data-changed t)
(remhash key tramp-cache-data))
(not (zerop (hash-table-count tramp-cache-data)))
tramp-cache-data-changed
(stringp tramp-persistency-file-name))
- (let ((cache (copy-hash-table tramp-cache-data)))
- ;; Remove temporary data.
+ (let ((cache (copy-hash-table tramp-cache-data))
+ print-length print-level)
+ ;; Remove temporary data. If there is the key "login-as", we
+ ;; don't save either, because all other properties might
+ ;; depend on the login name, and we want to give the
+ ;; possibility to use another login name later on.
(maphash
(lambda (key value)
- (if (and (vectorp key) (not (tramp-file-name-localname key)))
+ (if (and (vectorp key)
+ (not (tramp-file-name-localname key))
+ (not (gethash "login-as" value)))
(progn
(remhash "process-name" value)
(remhash "process-buffer" value)
(while (setq element (pop list))
(setq key (pop element))
(while (setq item (pop element))
- (tramp-set-connection-property key (pop item) (car item)))))
+ ;; We set only values which are not contained in
+ ;; `tramp-connection-properties'. The cache is
+ ;; initialized properly by side effect.
+ (unless (tramp-connection-property-p key (car item))
+ (tramp-set-connection-property key (pop item) (car item))))))
(setq tramp-cache-data-changed nil))
(file-error
;; Most likely because the file doesn't exist yet. No message.