;; Author: Peter Breton <pbreton@cs.umb.edu>
;; Created: Sun Nov 17 1996
;; Keywords: processes
-;; Time-stamp: <1998-03-14 09:24:38 pbreton>
+;; Time-stamp: <1999-02-21 01:27:24 pbreton>
;; This file is part of GNU Emacs.
;;
;; Determining this information may take some experimentation. Setting
;; the variable `dirtrack-debug' may help; it causes the directory-tracking
-;; filter to log messages to the buffer `dirtrack-debug-buffer'.
+;; filter to log messages to the buffer `dirtrack-debug-buffer'. You can easily
+;; toggle this setting with the `dirtrack-debug-toggle' function.
;;
;; 3) Add a hook to shell-mode to enable the directory tracking:
;;
;; (add-hook 'shell-mode-hook
;; (function (lambda ()
-;; (setq comint-output-filter-functions
+;; (setq comint-preoutput-filter-functions
;; (append (list 'dirtrack)
-;; comint-output-filter-functions)))))
+;; comint-preoutput-filter-functions)))))
;;
;; You may wish to turn ordinary shell tracking off by calling
;; `shell-dirtrack-toggle' or setting `shell-dirtrackp'.
;;
;; This saves me from having to use the %E prefix in other non-emacs
;; shells.
+;;
+;; A final note:
+;;
+;; I run LOTS of shell buffers through Emacs, sometimes as different users
+;; (eg, when logged in as myself, I'll run a root shell in the same Emacs).
+;; If you do this, and the shell prompt contains a ~, Emacs will interpret
+;; this relative to the user which owns the Emacs process, not the user
+;; who owns the shell buffer. This may cause dirtrack to behave strangely
+;; (typically it reports that it is unable to cd to a directory
+;; with a ~ in it).
+;;
+;; The same behavior can occur if you use dirtrack with remote filesystems
+;; (using telnet, rlogin, etc) as Emacs will be checking the local
+;; filesystem, not the remote one. This problem is not specific to dirtrack,
+;; but also affects file completion, etc.
;;; Code:
:type 'function
)
+(defcustom dirtrack-directory-change-hook nil
+ "Hook that is called when a directory change is made."
+ :group 'dirtrack
+ :type 'hook
+ )
+
+
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Functions
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(setq dirtrackp (not dirtrackp))
(message "Directory tracking %s" (if dirtrackp "ON" "OFF")))
+(defun dirtrack-debug-toggle ()
+ "Enable or disable Dirtrack debugging."
+ (interactive)
+ (setq dirtrack-debug (not dirtrack-debug))
+ (message "Directory debugging %s" (if dirtrack-debug "ON" "OFF"))
+ (and dirtrack-debug
+ (display-buffer (get-buffer-create dirtrack-debug-buffer))))
+
(defun dirtrack-debug-message (string)
(let ((buf (current-buffer))
(debug-buf (get-buffer-create dirtrack-debug-buffer))
;;;###autoload
(defun dirtrack (input)
+ "Determine the current directory by scanning the process output for a prompt.
+The prompt to look for is the first item in `dirtrack-list'.
+
+You can toggle directory tracking by using the function `dirtrack-toggle'.
+
+If directory tracking does not seem to be working, you can use the
+function `dirtrack-debug-toggle' to turn on debugging output.
+
+You can enable directory tracking by adding this function to
+`comint-output-filter-functions'.
+"
(if (null dirtrackp)
nil
- (let ((prompt-path)
+ (let (prompt-path
+ matched
(current-dir default-directory)
- (matched)
(dirtrack-regexp (nth 0 dirtrack-list))
(match-num (nth 1 dirtrack-list))
(multi-line (nth 2 dirtrack-list))
(if (eq (point) (point-min))
nil
(save-excursion
- (goto-char (point-max))
- ;; Look for the prompt
- (if multi-line
- (setq matched
- (re-search-backward
- dirtrack-regexp
- comint-last-output-start
- t))
- (beginning-of-line)
- (setq matched (looking-at dirtrack-regexp)))
+ (setq matched (string-match dirtrack-regexp input)))
;; No match
(if (null matched)
(and dirtrack-debug
(dirtrack-debug-message
(format
- "Failed to match regexp: %s"
- dirtrack-regexp)))
+ "Input `%s' failed to match regexp: %s"
+ input dirtrack-regexp)))
(setq prompt-path
- (buffer-substring-no-properties
+ (substring input
(match-beginning match-num) (match-end match-num)))
;; Empty string
(if (not (> (length prompt-path) 0))
(if (file-accessible-directory-p prompt-path)
;; Change directory
(and (shell-process-cd prompt-path)
+ (run-hooks 'dirtrack-directory-change-hook)
dirtrack-debug
(dirtrack-debug-message
(format "Changing directory to %s" prompt-path)))
(error "Directory %s does not exist" prompt-path)))
- )))))))
+ )))))
+ input)
(provide 'dirtrack)