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Diffstat (limited to 'lisp/dirtrack.el')
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diff --git a/lisp/dirtrack.el b/lisp/dirtrack.el deleted file mode 100644 index 9f289f31fba..00000000000 --- a/lisp/dirtrack.el +++ /dev/null @@ -1,244 +0,0 @@ -;;; dirtrack.el --- Directory Tracking by watching the prompt - -;; Copyright (C) 1996 Free Software Foundation, Inc. - -;; Author: Peter Breton -;; Created: Sun Nov 17 1996 -;; Keywords: processes -;; Time-stamp: <96/12/26 09:23:01 peter> - -;; This file is part of GNU Emacs. - -;; GNU Emacs is free software; you can redistribute it and/or modify -;; it under the terms of the GNU General Public License as published by -;; the Free Software Foundation; either version 2, or (at your option) -;; any later version. - -;; GNU Emacs is distributed in the hope that it will be useful, -;; but WITHOUT ANY WARRANTY; without even the implied warranty of -;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -;; GNU General Public License for more details. - -;; You should have received a copy of the GNU General Public License -;; along with GNU Emacs; see the file COPYING. If not, write to the -;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, -;; Boston, MA 02111-1307, USA. - -;;; Commentary: - -;; Shell directory tracking by watching the prompt. -;; -;; This is yet another attempt at a directory-tracking package for -;; Emacs shell-mode. However, this package makes one strong assumption: -;; that you can customize your shell's prompt to contain the -;; current working directory. Most shells do support this, including -;; almost every type of Bourne and C shell on Unix, the native shells on -;; Windows95 (COMMAND.COM) and Windows NT (CMD.EXE), and most 3rd party -;; Windows shells. If you cannot do this, or do not wish to, this package -;; will be useless to you. -;; -;; Installation: -;; -;; 1) Set your shell's prompt to contain the current working directory. -;; You may need to consult your shell's documentation to find out how to -;; do this. -;; -;; Note that directory tracking is done by matching regular expressions, -;; therefore it is *VERY IMPORTANT* for your prompt to be easily -;; distinguishable from other output. If your prompt regexp is too general, -;; you will see error messages from the dirtrack filter as it attempts to cd -;; to non-existent directories. -;; -;; 2) Set the variable 'dirtrack-list' to an appropriate value. This -;; should be a list of two elements: the first is a regular expression -;; which matches your prompt up to and including the pathname part. -;; The second is a number which tells which regular expression group to -;; match to extract only the pathname. If you use a multi-line prompt, -;; add 't' as a third element. Note that some of the functions in -;; 'comint.el' assume a single-line prompt (eg, comint-bol). -;; -;; 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'. -;; -;; 3) Autoload directory tracking by adding the following to your .emacs: -;; -;; (autoload 'dirtrack "dirtrack" -;; "Directory tracking by watching the prompt") -;; -;; 4) Add a hook to shell-mode to enable the directory tracking: -;; -;; (add-hook 'shell-mode-hook -;; (function (lambda () -;; (setq comint-output-filter-functions -;; (append (list 'dirtrack) -;; comint-output-filter-functions))))) -;; -;; You may wish to turn ordinary shell tracking off by calling -;; 'shell-dirtrack-toggle' or setting 'shell-dirtrackp'. -;; -;; Examples: -;; -;; 1) On Windows NT, my prompt is set to emacs$S$P$G. -;; 'dirtrack-list' is set to (list "^emacs \\([a-zA-Z]:.*\\)>" 1) -;; -;; 2) On Solaris running bash, my prompt is set like this: -;; PS1="\w\012emacs@\h(\!) [\t]% " -;; 'dirtrack-list' is set to (list "^\\([/~].*\\)\nemacs@[^%]+% *" 1 t) -;; -;; I'd appreciate other examples from people who use this package. - -;;; Code: - -(eval-when-compile - (require 'comint) - (require 'shell)) - -(defvar dirtrack-list (list "^emacs \\([a-zA-Z]:.*\\)>" 1) - "*List for directory tracking. -First item is a regexp that describes where to find the path in a prompt. -Second is a number, the regexp group to match. Optional third item is -whether the prompt is multi-line. If nil or omitted, prompt is assumed to -be on a single line.") - -(make-variable-buffer-local 'dirtrack-list) - -(defvar dirtrack-debug nil - "*If non-nil, the function 'dirtrack' will report debugging info.") - -(defvar dirtrack-debug-buffer "*Directory Tracking Log*" - "Buffer to write directory tracking debug information.") - -(defvar dirtrackp t - "*If non-nil, directory tracking via 'dirtrack' is enabled.") - -(make-variable-buffer-local 'dirtrackp) - -(defvar dirtrack-directory-function - (if (memq system-type (list 'ms-dos 'windows-nt)) - 'dirtrack-windows-directory-function - 'dirtrack-default-directory-function) - "*Function to apply to the prompt directory for comparison purposes.") - -(defvar dirtrack-canonicalize-function - (if (memq system-type (list 'ms-dos 'windows-nt)) - 'downcase 'identity) - "*Function to apply to the default directory for comparison purposes.") - -(defun dirtrack-default-directory-function (dir) - "Return a canonical directory for comparison purposes. -Such a directory ends with a forward slash." - (let ((directory dir)) - (if (not (char-equal ?/ (string-to-char (substring directory -1)))) - (concat directory "/") - directory))) - -(defun dirtrack-windows-directory-function (dir) - "Return a canonical directory for comparison purposes. -Such a directory is all lowercase, has forward-slashes as delimiters, -and ends with a forward slash." - (let ((directory dir)) - (setq directory (downcase (replace-slash directory t))) - (if (not (char-equal ?/ (string-to-char (substring directory -1)))) - (concat directory "/") - directory))) - -(defconst forward-slash (regexp-quote "/")) -(defconst backward-slash (regexp-quote "\\")) - -(defun replace-slash (string &optional opposite) - "Replace forward slashes with backwards ones. -If additional argument is non-nil, replace backwards slashes with -forward ones." - (let ((orig (if opposite backward-slash forward-slash)) - (replace (if opposite forward-slash backward-slash)) - (newstring string) - ) - (while (string-match orig newstring) - (setq newstring (replace-match replace nil t newstring))) - newstring)) - -;; Copied from shell.el -(defun dirtrack-toggle () - "Enable or disable Dirtrack directory tracking in a shell buffer." - (interactive) - (setq dirtrackp (not dirtrackp)) - (message "Directory tracking %s" (if dirtrackp "ON" "OFF"))) - -(defun dirtrack-debug-message (string) - (let ((buf (current-buffer)) - (debug-buf (get-buffer-create dirtrack-debug-buffer)) - ) - (set-buffer debug-buf) - (insert (concat string "\n")) - (set-buffer buf) - )) - -;;;###autoload -(defun dirtrack (input) - (if (null dirtrackp) - nil - (let ((prompt-path) - (current-dir default-directory) - (matched) - (dirtrack-regexp (nth 0 dirtrack-list)) - (match-num (nth 1 dirtrack-list)) - (multi-line (nth 2 dirtrack-list)) - ) - ;; No output? - (if (eq (point) (point-min)) - nil - (save-excursion - (goto-char comint-last-output-start) - ;; Look for the prompt - (if multi-line - (and - (goto-char (point-max)) - (setq matched - (re-search-backward - dirtrack-regexp - comint-last-output-start - t))) - (beginning-of-line) - (setq matched (looking-at dirtrack-regexp))) - ;; No match - (if (null matched) - (and dirtrack-debug - (dirtrack-debug-message - (format - "Failed to match regexp: %s" - dirtrack-regexp))) - (setq prompt-path - (buffer-substring-no-properties - (match-beginning match-num) (match-end match-num))) - ;; Empty string - (if (not (> (length prompt-path) 0)) - (and dirtrack-debug - (dirtrack-debug-message "Match is empty string")) - ;; Transform prompts into canonical forms - (setq prompt-path (funcall dirtrack-directory-function - prompt-path)) - (setq current-dir (funcall dirtrack-canonicalize-function - current-dir)) - (and dirtrack-debug - (dirtrack-debug-message - (format - "Prompt is %s\nCurrent directory is %s" - prompt-path current-dir))) - ;; Compare them - (if (or (string= current-dir prompt-path) - (string= current-dir - (abbreviate-file-name prompt-path))) - (and dirtrack-debug - (dirtrack-debug-message - (format "Not changing directory"))) - ;; Change directory - (shell-process-cd prompt-path) - (and dirtrack-debug - (dirtrack-debug-message - (format "Changing directory to %s" prompt-path)))) - ))))))) - -(provide 'dirtrack) - -;;; dirtrack.el ends here |