;;; tramp-cache.el --- file information caching for Tramp
-;; Copyright (C) 2000, 2005-2012 Free Software Foundation, Inc.
+;; Copyright (C) 2000, 2005-2014 Free Software Foundation, Inc.
;; Author: Daniel Pittman <daniel@inanna.danann.net>
;; Michael Albinus <michael.albinus@gmx.de>
;;
;; - localname is a string. This are temporary properties, which are
;; related to the file localname is referring to. Examples:
-;; "file-exists-p" is t or nile, depending on the file existence, or
+;; "file-exists-p" is t or nil, depending on the file existence, or
;; "file-attributes" caches the result of the function
-;; `file-attributes'.
+;; `file-attributes'. These entries have a timestamp, and they
+;; expire after `remote-file-name-inhibit-cache' seconds if this
+;; variable is set.
;;
;; - The key is a process. This are temporary properties related to
;; an open connection. Examples: "scripts" keeps shell script
(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 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
-(defun tramp-flush-file-property (vec file)
- "Remove all properties of FILE in the cache context of VEC."
- ;; Remove file property of symlinks.
- (let ((truename (tramp-get-file-property vec file "file-truename" nil)))
+(defun tramp-flush-file-property (key file)
+ "Remove all properties of FILE in the cache context of KEY."
+ ;; Remove file properties of symlinks.
+ (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)
+ (let* ((directory (tramp-run-real-handler
+ 'directory-file-name (list directory)))
+ (truename (tramp-get-file-property key directory "file-truename" nil)))
+ ;; Remove file properties of symlinks.
+ (when (and (stringp truename)
+ (not (string-equal directory truename)))
+ (tramp-flush-directory-property key truename))
+ (tramp-message key 8 "%s" directory)
(maphash
- (lambda (key value)
+ (lambda (key _value)
(when (and (stringp (tramp-file-name-localname key))
(string-match directory (tramp-file-name-localname key)))
(remhash key tramp-cache-data)))
;; Reverting or killing a buffer should also flush file properties.
;; They could have been changed outside Tramp. In eshell, "ls" would
;; not show proper directory contents when a file has been copied or
-;; deleted before.
+;; deleted before. We must apply `save-match-data', because it would
+;; corrupt other packages otherwise (reported from org).
(defun tramp-flush-file-function ()
- "Flush all Tramp cache properties from `buffer-file-name'."
- (let ((bfn (if (stringp (buffer-file-name))
- (buffer-file-name)
- default-directory)))
- (when (tramp-tramp-file-p bfn)
- (with-parsed-tramp-file-name bfn nil
- (tramp-flush-file-property v localname)))))
+ "Flush all Tramp cache properties from `buffer-file-name'.
+This is suppressed for temporary buffers."
+ (save-match-data
+ (unless
+ (string-match
+ (concat
+ "^" (regexp-opt '("*tramp/" "*debug tramp/" " *temp*") 'paren))
+ (or (buffer-name) ""))
+
+ (let ((bfn (if (stringp (buffer-file-name))
+ (buffer-file-name)
+ default-directory)))
+ (when (tramp-tramp-file-p bfn)
+ (with-parsed-tramp-file-name bfn nil
+ (tramp-flush-file-property v localname)))))))
(add-hook 'before-revert-hook 'tramp-flush-file-function)
(add-hook 'eshell-pre-command-hook 'tramp-flush-file-function)
(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
+(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)
"Remove all properties identified by 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))
(let (result)
(maphash
(lambda (key value)
+ ;; Remove text properties from KEY and VALUE.
+ ;; `substring-no-properties' does not exist in XEmacs.
+ (when (functionp 'substring-no-properties)
+ (when (vectorp key)
+ (dotimes (i (length key))
+ (when (stringp (aref key i))
+ (aset key i
+ (tramp-compat-funcall
+ 'substring-no-properties (aref key i))))))
+ (when (stringp key)
+ (setq key (tramp-compat-funcall 'substring-no-properties key)))
+ (when (stringp value)
+ (setq value
+ (tramp-compat-funcall 'substring-no-properties value))))
+ ;; Dump.
(let ((tmp (format
"(%s %s)"
(if (processp key)
"Return a list of all known connection vectors according to `tramp-cache'."
(let (result)
(maphash
- (lambda (key value)
+ (lambda (key _value)
(when (and (vectorp key) (null (aref key 3)))
(add-to-list 'result key)))
tramp-cache-data)
for all methods. Resulting data are derived from connection history."
(let (res)
(maphash
- (lambda (key value)
+ (lambda (key _value)
(if (and (vectorp key)
(string-equal method (tramp-file-name-method key))
(not (tramp-file-name-localname key)))
(with-temp-buffer
(insert-file-contents tramp-persistency-file-name)
(let ((list (read (current-buffer)))
+ (tramp-verbose 0)
element key item)
(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.