;;; shell.el --- specialized comint.el for running the shell.
-;;; Copyright (C) 1988, 1993 Free Software Foundation, Inc.
+
+;; Copyright (C) 1988, 1993, 1994 Free Software Foundation, Inc.
;; Author: Olin Shivers <shivers@cs.cmu.edu>
+;; Maintainer: Simon Marshall <s.marshall@dcs.hull.ac.uk>
;; Keywords: processes
-;;; This file is part of GNU Emacs.
+;; 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 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.
+;; 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+;; 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, 675 Mass Ave, Cambridge, MA 02139, USA.
;;; Commentary:
-;;; The changelog is at the end of file.
-
;;; Please send me bug reports, bug fixes, and extensions, so that I can
;;; merge them into the master source.
;;; - Olin Shivers (shivers@cs.cmu.edu)
+;;; - Simon Marshall (s.marshall@dcs.hull.ac.uk)
;;; This file defines a a shell-in-a-buffer package (shell mode) built
;;; on top of comint mode. This is actually cmushell with things
;;=============================================================================
;; Some suggestions for your .emacs file.
;;
-;; ; If shell lives in some non-standard directory, you must tell emacs
-;; ; where to get it. This may or may not be necessary.
-;; (setq load-path (cons (expand-file-name "~jones/lib/emacs") load-path))
-;;
-;; ; Autoload shell from file shell.el
-;; (autoload 'shell "shell"
-;; "Run an inferior shell process."
-;; t)
-;;
-;; ; Define C-c t to run my favorite command in shell mode:
-;; (setq shell-load-hook
+;; ;; Define C-c t to run my favorite command in shell mode:
+;; (setq shell-mode-hook
;; '((lambda ()
;; (define-key shell-mode-map "\C-ct" 'favorite-cmd))))
;;;
;;; m-p comint-previous-input Cycle backwards in input history
;;; m-n comint-next-input Cycle forwards
-;;; m-c-r comint-previous-input-matching Search backwards in input history
+;;; m-r comint-previous-matching-input Previous input matching a regexp
+;;; m-R comint-previous-matching-input-from-input -"- matching input
+;;; m-s comint-next-matching-input Next input that matches
+;;; m-S comint-next-matching-input-from-input -"- matching input
+;;; m-c-l comint-show-output Show last batch of process output
;;; return comint-send-input
-;;; c-a comint-bol Beginning of line; skip prompt.
+;;; c-a comint-bol Beginning of line; skip prompt
;;; c-d comint-delchar-or-maybe-eof Delete char unless at end of buff.
;;; c-c c-u comint-kill-input ^u
;;; c-c c-w backward-kill-word ^w
;;; c-c c-\ comint-quit-subjob ^\
;;; c-c c-o comint-kill-output Delete last batch of process output
;;; c-c c-r comint-show-output Show last batch of process output
+;;; c-c c-h comint-dynamic-list-input-ring List input history
;;; send-invisible Read line w/o echo & send to proc
;;; comint-continue-subjob Useful if you accidentally suspend
-;;; top-level job.
+;;; top-level job
;;; comint-mode-hook is the comint mode hook.
;;; Shell Mode Commands:
-;;; shell Fires up the shell process.
-;;; tab comint-dynamic-complete Complete a partial file name
-;;; m-? comint-dynamic-list-completions List completions in help buffer
-;;; dirs Resync the buffer's dir stack.
-;;; dirtrack-toggle Turn dir tracking on/off.
+;;; shell Fires up the shell process
+;;; tab comint-dynamic-complete Complete filename/command/history
+;;; m-? comint-dynamic-list-filename-completions List completions in help buffer
+;;; m-c-f shell-forward-command Forward a shell command
+;;; m-c-b shell-backward-command Backward a shell command
+;;; dirs Resync the buffer's dir stack
+;;; dirtrack-toggle Turn dir tracking on/off
+;;; shell-strip-ctrl-m Remove trailing ^Ms from output
;;;
;;; The shell mode hook is shell-mode-hook
-;;; The shell-load-hook is run after this file is loaded.
;;; comint-prompt-regexp is initialised to shell-prompt-pattern, for backwards
;;; compatibility.
This is a fine thing to set in your `.emacs' file.")
+(defvar shell-completion-fignore nil
+ "*List of suffixes to be disregarded during file/command completion.
+This variable is used to initialize `comint-completion-fignore' in the shell
+buffer. The default is nil, for compatibility with most shells.
+Some people like (\"~\" \"#\" \"%\").
+
+This is a fine thing to set in your `.emacs' file.")
+
+(defvar shell-delimiter-argument-list '(?\| ?& ?< ?> ?\( ?\) ?\;)
+ "List of characters to recognise as separate arguments.
+This variable is used to initialize `comint-delimiter-argument-list' in the
+shell buffer. The default is (?\\| ?& ?< ?> ?\\( ?\\) ?\\;).
+
+This is a fine thing to set in your `.emacs' file.")
+
+(defvar shell-dynamic-complete-functions
+ '(comint-replace-by-expanded-history
+ shell-dynamic-complete-environment-variable
+ shell-dynamic-complete-command
+ shell-replace-by-expanded-directory
+ comint-dynamic-complete-filename)
+ "List of functions called to perform completion.
+This variable is used to initialise `comint-dynamic-complete-functions' in the
+shell buffer.
+
+This is a fine thing to set in your `.emacs' file.")
+
+(defvar shell-command-regexp "\\((.*)\\|[^;&|]\\)+"
+ "*Regexp to match shell commands.
+Elements of pipes are considered as separate commands, forks and redirections
+as part of one command.")
+
+(defvar shell-completion-execonly t
+ "*If non-nil, use executable files only for completion candidates.
+This mirrors the optional behavior of tcsh.
+
+Detecting executability of files may slow command completion considerably.")
+
(defvar shell-popd-regexp "popd"
"*Regexp to match subshell commands equivalent to popd.")
(defvar shell-pushd-regexp "pushd"
"*Regexp to match subshell commands equivalent to pushd.")
+(defvar shell-pushd-tohome nil
+ "*If non-nil, make pushd with no arg behave as \"pushd ~\" (like cd).
+This mirrors the optional behavior of tcsh.")
+
+(defvar shell-pushd-dextract nil
+ "*If non-nil, make \"pushd +n\" pop the nth dir to the stack top.
+This mirrors the optional behavior of tcsh.")
+
+(defvar shell-pushd-dunique nil
+ "*If non-nil, make pushd only add unique directories to the stack.
+This mirrors the optional behavior of tcsh.")
+
(defvar shell-cd-regexp "cd"
"*Regexp to match subshell commands equivalent to cd.")
"*Args passed to inferior shell by M-x shell, if the shell is csh.
Value is a list of strings, which may be nil.")
-;;; All the above vars aren't prefixed "cmushell-" to make them
-;;; backwards compatible w/shell.el and old .emacs files.
+(defvar shell-input-autoexpand 'history
+ "*If non-nil, expand input command history references on completion.
+This mirrors the optional behavior of tcsh (its autoexpand and histlit).
+
+If the value is `input', then the expansion is seen on input.
+If the value is `history', then the expansion is only when inserting
+into the buffer's input ring. See also `comint-magic-space' and
+`comint-dynamic-complete'.
+
+This variable supplies a default for `comint-input-autoexpand',
+for Shell mode only.")
(defvar shell-dirstack nil
"List of directories saved by pushd in this buffer's shell.
Thus, this does not include the shell's current directory.")
+(defvar shell-dirtrackp t
+ "Non-nil in a shell buffer means directory tracking is enabled.")
+
(defvar shell-last-dir nil
"Keep track of last directory for ksh `cd -' command.")
(defvar shell-dirstack-query "dirs"
"Command used by `shell-resync-dir' to query the shell.")
-(defvar shell-mode-map '())
+(defvar shell-mode-map nil)
(cond ((not shell-mode-map)
- (setq shell-mode-map (full-copy-sparse-keymap comint-mode-map))
+ (setq shell-mode-map (copy-keymap comint-mode-map))
+ (define-key shell-mode-map "\C-c\C-f" 'shell-forward-command)
+ (define-key shell-mode-map "\C-c\C-b" 'shell-backward-command)
(define-key shell-mode-map "\t" 'comint-dynamic-complete)
- (define-key shell-mode-map "\M-?" 'comint-dynamic-list-completions)))
+ (define-key shell-mode-map "\M-?"
+ 'comint-dynamic-list-filename-completions)
+ (define-key-after (lookup-key shell-mode-map [menu-bar completion])
+ [complete-env-variable] '("Complete Env. Variable Name" .
+ shell-dynamic-complete-environment-variable)
+ 'complete-file)
+ (define-key-after (lookup-key shell-mode-map [menu-bar completion])
+ [expand-directory] '("Expand Directory Reference" .
+ shell-replace-by-expanded-directory)
+ 'complete-expand)))
(defvar shell-mode-hook '()
"*Hook for customising Shell mode.")
Return before end of process output copies the current line (except
for the prompt) to the end of the buffer and sends it.
M-x send-invisible reads a line of text without echoing it, and sends it to
- the shell. This is useful for entering passwords.
+ the shell. This is useful for entering passwords. Or, add the function
+ `comint-watch-for-password-prompt' to `comint-output-filter-functions'.
If you accidentally suspend your process, use \\[comint-continue-subjob]
to continue it.
\\{shell-mode-map}
Customization: Entry to this mode runs the hooks on `comint-mode-hook' and
-`shell-mode-hook' (in that order).
+`shell-mode-hook' (in that order). Before each input, the hooks on
+`comint-input-filter-functions' are run. After each shell output, the hooks
+on `comint-output-filter-functions' are run.
Variables `shell-cd-regexp', `shell-pushd-regexp' and `shell-popd-regexp'
-are used to match their respective commands."
+are used to match their respective commands, while `shell-pushd-tohome',
+`shell-pushd-dextract' and `shell-pushd-dunique' control the behavior of the
+relevant command.
+
+Variables `comint-completion-autolist', `comint-completion-addsuffix',
+`comint-completion-recexact' and `comint-completion-fignore' control the
+behavior of file name, command name and variable name completion. Variable
+`shell-completion-execonly' controls the behavior of command name completion.
+Variable `shell-completion-fignore' is used to initialise the value of
+`comint-completion-fignore'.
+
+Variables `comint-input-ring-file-name' and `comint-input-autoexpand' control
+the initialisation of the input ring history, and history expansion.
+
+Variables `comint-output-filter-functions', a hook, and
+`comint-scroll-to-bottom-on-input' and `comint-scroll-to-bottom-on-output'
+control whether input and output cause the window to scroll to the end of the
+buffer."
(interactive)
(comint-mode)
- (setq comint-prompt-regexp shell-prompt-pattern)
(setq major-mode 'shell-mode)
(setq mode-name "Shell")
(use-local-map shell-mode-map)
+ (setq comint-prompt-regexp shell-prompt-pattern)
+ (setq comint-completion-fignore shell-completion-fignore)
+ (setq comint-delimiter-argument-list shell-delimiter-argument-list)
+ (setq comint-dynamic-complete-functions shell-dynamic-complete-functions)
+ (make-local-variable 'paragraph-start)
+ (setq paragraph-start comint-prompt-regexp)
(make-local-variable 'shell-dirstack)
(setq shell-dirstack nil)
(setq shell-last-dir nil)
(make-local-variable 'shell-dirtrackp)
(setq shell-dirtrackp t)
- (setq comint-input-sentinel 'shell-directory-tracker)
- (run-hooks 'shell-mode-hook))
-
+ (add-hook 'comint-input-filter-functions 'shell-directory-tracker)
+ (setq comint-input-autoexpand shell-input-autoexpand)
+ ;; shell-dependent assignments.
+ (let ((shell (car (process-command (get-buffer-process (current-buffer))))))
+ (setq comint-input-ring-file-name
+ (or (getenv "HISTFILE")
+ (cond ((string-match "csh$" shell) "~/.history")
+ ((string-match "bash$" shell) "~/.bash_history")
+ ((string-match "ksh$" shell) "~/.sh_history")
+ (t "~/.history")))))
+ (run-hooks 'shell-mode-hook)
+ (comint-read-input-ring t))
\f
;;;###autoload
(defun shell ()
"Run an inferior shell, with I/O through buffer *shell*.
If buffer exists but shell process is not running, make new shell.
-If buffer exists and shell process is running,
- just switch to buffer `*shell*'.
+If buffer exists and shell process is running, just switch to buffer `*shell*'.
Program used comes from variable `explicit-shell-file-name',
or (if that is nil) from the ESHELL environment variable,
or else from SHELL if there is no ESHELL.
\(Type \\[describe-mode] in the shell buffer for a list of commands.)"
(interactive)
- (cond ((not (comint-check-proc "*shell*"))
- (let* ((prog (or explicit-shell-file-name
- (getenv "ESHELL")
- (getenv "SHELL")
- "/bin/sh"))
- (name (file-name-nondirectory prog))
- (startfile (concat "~/.emacs_" name))
- (xargs-name (intern-soft (concat "explicit-" name "-args"))))
- (set-buffer (apply 'make-comint "shell" prog
- (if (file-exists-p startfile) startfile)
- (if (and xargs-name (boundp xargs-name))
- (symbol-value xargs-name)
- '("-i"))))
- (shell-mode))))
+ (if (not (comint-check-proc "*shell*"))
+ (let* ((prog (or explicit-shell-file-name
+ (getenv "ESHELL")
+ (getenv "SHELL")
+ "/bin/sh"))
+ (name (file-name-nondirectory prog))
+ (startfile (concat "~/.emacs_" name))
+ (xargs-name (intern-soft (concat "explicit-" name "-args"))))
+ (set-buffer (apply 'make-comint "shell" prog
+ (if (file-exists-p startfile) startfile)
+ (if (and xargs-name (boundp xargs-name))
+ (symbol-value xargs-name)
+ '("-i"))))
+ (shell-mode)))
(switch-to-buffer "*shell*"))
-
\f
;;; Directory tracking
;;; ===========================================================================
;;; This is basically a fragile hack, although it's more accurate than
;;; the version in Emacs 18's shell.el. It has the following failings:
;;; 1. It doesn't know about the cdpath shell variable.
-;;; 2. It only spots the first command in a command sequence. E.g., it will
-;;; miss the cd in "ls; cd foo"
-;;; 3. More generally, any complex command (like ";" sequencing) is going to
-;;; throw it. Otherwise, you'd have to build an entire shell interpreter in
-;;; emacs lisp. Failing that, there's no way to catch shell commands where
-;;; cd's are buried inside conditional expressions, aliases, and so forth.
+;;; 2. It cannot infallibly deal with command sequences, though it does well
+;;; with these and with ignoring commands forked in another shell with ()s.
+;;; 3. More generally, any complex command is going to throw it. Otherwise,
+;;; you'd have to build an entire shell interpreter in emacs lisp. Failing
+;;; that, there's no way to catch shell commands where cd's are buried
+;;; inside conditional expressions, aliases, and so forth.
;;;
;;; The whole approach is a crock. Shell aliases mess it up. File sourcing
;;; messes it up. You run other processes under the shell; these each have
;;; replace it with a process filter that watches for and strips out
;;; these messages.
-;;; REGEXP is a regular expression. STR is a string. START is a fixnum.
-;;; Returns T if REGEXP matches STR where the match is anchored to start
-;;; at position START in STR. Sort of like LOOKING-AT for strings.
-(defun shell-front-match (regexp str start)
- (eq start (string-match regexp str start)))
-
(defun shell-directory-tracker (str)
"Tracks cd, pushd and popd commands issued to the shell.
This function is called on each input passed to the shell.
You may toggle this tracking on and off with M-x dirtrack-toggle.
If emacs gets confused, you can resync with the shell with M-x dirs.
-See variables `shell-cd-regexp', `shell-pushd-regexp', and `shell-popd-regexp'.
-Environment variables are expanded, see function `substitute-in-file-name'."
- (condition-case err
- (cond (shell-dirtrackp
- (string-match "^\\s *" str) ; skip whitespace
- (let ((bos (match-end 0))
- (x nil))
- (cond ((setq x (shell-match-cmd-w/optional-arg shell-popd-regexp
- str bos))
- (shell-process-popd (substitute-in-file-name x)))
- ((setq x (shell-match-cmd-w/optional-arg shell-pushd-regexp
- str bos))
- (shell-process-pushd (substitute-in-file-name x)))
- ((setq x (shell-match-cmd-w/optional-arg shell-cd-regexp
- str bos))
- (shell-process-cd (substitute-in-file-name x)))))))
- (error (message (car (cdr err))))))
-
-
-;;; Try to match regexp CMD to string, anchored at position START.
-;;; CMD may be followed by a single argument. If a match, then return
-;;; the argument, if there is one, or the empty string if not. If
-;;; no match, return nil.
-
-(defun shell-match-cmd-w/optional-arg (cmd str start)
- (and (shell-front-match cmd str start)
- (let ((eoc (match-end 0))) ; end of command
- (cond ((shell-front-match "\\s *\\(\;\\|$\\)" str eoc)
- "") ; no arg
- ((shell-front-match "\\s +\\([^ \t\;]+\\)\\s *\\(\;\\|$\\)"
- str eoc)
- (substring str (match-beginning 1) (match-end 1))) ; arg
- (t nil))))) ; something else.
-;;; The first regexp is [optional whitespace, (";" or the end of string)].
-;;; The second regexp is [whitespace, (an arg), optional whitespace,
-;;; (";" or end of string)].
+See variables `shell-cd-regexp', `shell-pushd-regexp', and `shell-popd-regexp',
+while `shell-pushd-tohome', `shell-pushd-dextract' and `shell-pushd-dunique'
+control the behavior of the relevant command.
+Environment variables are expanded, see function `substitute-in-file-name'."
+ (if shell-dirtrackp
+ ;; We fail gracefully if we think the command will fail in the shell.
+ (condition-case chdir-failure
+ (let ((start (progn (string-match "^[;\\s ]*" str) ; skip whitespace
+ (match-end 0)))
+ end cmd arg1)
+ (while (string-match shell-command-regexp str start)
+ (setq end (match-end 0)
+ cmd (comint-arguments (substring str start end) 0 0)
+ arg1 (comint-arguments (substring str start end) 1 1))
+ (cond ((eq (string-match shell-popd-regexp cmd) 0)
+ (shell-process-popd (substitute-in-file-name arg1)))
+ ((eq (string-match shell-pushd-regexp cmd) 0)
+ (shell-process-pushd (substitute-in-file-name arg1)))
+ ((eq (string-match shell-cd-regexp cmd) 0)
+ (shell-process-cd (substitute-in-file-name arg1))))
+ (setq start (progn (string-match "[;\\s ]*" str end) ; skip again
+ (match-end 0)))))
+ (error "Couldn't cd"))))
;;; popd [+n]
(defun shell-process-popd (arg)
- (let ((num (if (zerop (length arg)) 0 ; no arg means +0
- (shell-extract-num arg))))
- (if (and num (< num (length shell-dirstack)))
- (if (= num 0) ; condition-case because the CD could lose.
- (condition-case nil (progn (cd (car shell-dirstack))
- (setq shell-dirstack
- (cdr shell-dirstack))
- (shell-dirstack-message))
- (error (message "Couldn't cd.")))
- (let* ((ds (cons nil shell-dirstack))
- (cell (nthcdr (- num 1) ds)))
- (rplacd cell (cdr (cdr cell)))
- (setq shell-dirstack (cdr ds))
- (shell-dirstack-message)))
- (message "Bad popd."))))
-
+ (let ((num (or (shell-extract-num arg) 0)))
+ (cond ((and num (= num 0) shell-dirstack)
+ (cd (car shell-dirstack))
+ (setq shell-dirstack (cdr shell-dirstack))
+ (shell-dirstack-message))
+ ((and num (> num 0) (<= num (length shell-dirstack)))
+ (let* ((ds (cons nil shell-dirstack))
+ (cell (nthcdr (1- num) ds)))
+ (rplacd cell (cdr (cdr cell)))
+ (setq shell-dirstack (cdr ds))
+ (shell-dirstack-message)))
+ (t
+ (error "Couldn't popd")))))
+
+;; Return DIR prefixed with comint-file-name-prefix as appropriate.
+(defsubst shell-prefixed-directory-name (dir)
+ (if (file-name-absolute-p dir)
+ ;; The name is absolute, so prepend the prefix.
+ (concat comint-file-name-prefix dir)
+ ;; For a relative name we assume default-directory already has the prefix.
+ (expand-file-name dir)))
;;; cd [dir]
(defun shell-process-cd (arg)
- (condition-case nil
- (let ((new-dir (cond
- ((zerop (length arg)) (getenv "HOME"))
- ((string-equal "-" arg) shell-last-dir)
- (t arg))))
- (setq shell-last-dir default-directory)
- (cd new-dir)
- (shell-dirstack-message))
- (error (message "Couldn't cd."))))
+ (let ((new-dir (cond ((zerop (length arg)) (concat comint-file-name-prefix
+ "~"))
+ ((string-equal "-" arg) shell-last-dir)
+ (t (shell-prefixed-directory-name arg)))))
+ (setq shell-last-dir default-directory)
+ (cd new-dir)
+ (shell-dirstack-message)))
;;; pushd [+n | dir]
(defun shell-process-pushd (arg)
- (if (zerop (length arg))
- ;; no arg -- swap pwd and car of shell stack
- (condition-case nil (if shell-dirstack
- (let ((old default-directory))
- (cd (car shell-dirstack))
- (setq shell-dirstack
- (cons old (cdr shell-dirstack)))
- (shell-dirstack-message))
- (message "Directory stack empty."))
- (error
- (message "Couldn't cd.")))
-
- (let ((num (shell-extract-num arg)))
- (if num ; pushd +n
- (if (> num (length shell-dirstack))
- (message "Directory stack not that deep.")
- (let* ((ds (cons default-directory shell-dirstack))
- (dslen (length ds))
- (front (nthcdr num ds))
- (back (reverse (nthcdr (- dslen num) (reverse ds))))
- (new-ds (append front back)))
- (condition-case nil
- (progn (cd (car new-ds))
- (setq shell-dirstack (cdr new-ds))
- (shell-dirstack-message))
- (error (message "Couldn't cd.")))))
-
- ;; pushd <dir>
- (let ((old-wd default-directory))
- (condition-case nil
- (progn (cd arg)
- (setq shell-dirstack
- (cons old-wd shell-dirstack))
- (shell-dirstack-message))
- (error (message "Couldn't cd."))))))))
+ (let ((num (shell-extract-num arg)))
+ (cond ((zerop (length arg))
+ ;; no arg -- swap pwd and car of stack unless shell-pushd-tohome
+ (cond (shell-pushd-tohome
+ (shell-process-pushd (concat comint-file-name-prefix "~")))
+ (shell-dirstack
+ (let ((old default-directory))
+ (cd (car shell-dirstack))
+ (setq shell-dirstack
+ (cons old (cdr shell-dirstack)))
+ (shell-dirstack-message)))
+ (t
+ (message "Directory stack empty."))))
+ ((numberp num)
+ ;; pushd +n
+ (cond ((> num (length shell-dirstack))
+ (message "Directory stack not that deep."))
+ ((= num 0)
+ (error (message "Couldn't cd.")))
+ (shell-pushd-dextract
+ (let ((dir (nth (1- num) shell-dirstack)))
+ (shell-process-popd arg)
+ (shell-process-pushd default-directory)
+ (cd dir)
+ (shell-dirstack-message)))
+ (t
+ (let* ((ds (cons default-directory shell-dirstack))
+ (dslen (length ds))
+ (front (nthcdr num ds))
+ (back (reverse (nthcdr (- dslen num) (reverse ds))))
+ (new-ds (append front back)))
+ (cd (car new-ds))
+ (setq shell-dirstack (cdr new-ds))
+ (shell-dirstack-message)))))
+ (t
+ ;; pushd <dir>
+ (let ((old-wd default-directory))
+ (cd (shell-prefixed-directory-name arg))
+ (if (or (null shell-pushd-dunique)
+ (not (member old-wd shell-dirstack)))
+ (setq shell-dirstack (cons old-wd shell-dirstack)))
+ (shell-dirstack-message))))))
;; If STR is of the form +n, for n>0, return n. Otherwise, nil.
(defun shell-extract-num (str)
"Turn directory tracking on and off in a shell buffer."
(interactive)
(setq shell-dirtrackp (not shell-dirtrackp))
- (message "directory tracking %s."
- (if shell-dirtrackp "ON" "OFF")))
+ (message "Directory tracking %s" (if shell-dirtrackp "ON" "OFF")))
;;; For your typing convenience:
(defalias 'dirtrack-toggle 'shell-dirtrack-toggle)
(goto-char pt)))
(goto-char pmark) (delete-char 1) ; remove the extra newline
;; That's the dirlist. grab it & parse it.
- (let* ((dl (buffer-substring (match-beginning 0) (- (match-end 0) 1)))
+ (let* ((dl (buffer-substring (match-beginning 0) (1- (match-end 0))))
(dl-len (length dl))
(ds '()) ; new dir stack
(i 0))
(while (< i dl-len)
;; regexp = optional whitespace, (non-whitespace), optional whitespace
(string-match "\\s *\\(\\S +\\)\\s *" dl i) ; pick off next dir
- (setq ds (cons (substring dl (match-beginning 1) (match-end 1))
+ (setq ds (cons (concat comint-file-name-prefix
+ (substring dl (match-beginning 1)
+ (match-end 1)))
ds))
(setq i (match-end 0)))
- (let ((ds (reverse ds)))
+ (let ((ds (nreverse ds)))
(condition-case nil
(progn (cd (car ds))
(setq shell-dirstack (cdr ds))
;;; All the commands that mung the buffer's dirstack finish by calling
;;; this guy.
(defun shell-dirstack-message ()
- (let ((msg "")
- (ds (cons default-directory shell-dirstack)))
+ (let* ((msg "")
+ (ds (cons default-directory shell-dirstack))
+ (home (expand-file-name (concat comint-file-name-prefix "~/")))
+ (homelen (length home)))
(while ds
(let ((dir (car ds)))
- (if (string-match (format "^%s\\(/\\|$\\)" (getenv "HOME")) dir)
- (setq dir (concat "~/" (substring dir (match-end 0)))))
- (if (string-equal dir "~/") (setq dir "~"))
- (setq msg (concat msg dir " "))
+ (and (>= (length dir) homelen) (string= home (substring dir 0 homelen))
+ (setq dir (concat "~/" (substring dir homelen))))
+ ;; Strip off comint-file-name-prefix if present.
+ (and comint-file-name-prefix
+ (>= (length dir) (length comint-file-name-prefix))
+ (string= comint-file-name-prefix
+ (substring dir 0 (length comint-file-name-prefix)))
+ (setq dir (substring dir (length comint-file-name-prefix)))
+ (setcar ds dir))
+ (setq msg (concat msg (directory-file-name dir) " "))
(setq ds (cdr ds))))
(message msg)))
-
-
\f
-;;; Interfacing to client packages (and converting them)
-;;; Notes from when this was called cmushell, and was not the standard emacs
-;;; shell package. Many of the conversions discussed here have been done.
-;;;============================================================================
-;;; Several gnu packages (tex-mode, background, dbx, gdb, kermit, prolog,
-;;; telnet are some) use the shell package as clients. Most of them would
-;;; be better off using the comint package directly, but they predate it.
-;;; The catch is that most of these packages (dbx, gdb, prolog, telnet)
-;;; assume total knowledge of all the local variables that shell mode
-;;; functions depend on. So they (kill-all-local-variables), then create
-;;; the few local variables that shell.el functions depend on. Alas,
-;;; cmushell.el functions depend on a different set of vars (for example,
-;;; the input history ring is a local variable in cmushell.el's shell mode,
-;;; whereas there is no input history ring in shell.el's shell mode).
-;;; So we have a situation where the greater functionality of cmushell.el
-;;; is biting us -- you can't just replace shell will cmushell.
-;;;
-;;; Altering these packages to use comint mode directly should *greatly*
-;;; improve their functionality, and is actually pretty easy. It's
-;;; mostly a matter of renaming a few variable names. See comint.el for more.
-;;; -Olin
-
-
-
-;;; Do the user's customization...
-;;;===============================
-(defvar shell-load-hook nil
- "This hook is run when shell is loaded in.
-This is a good place to put keybindings.")
-
-(run-hooks 'shell-load-hook)
+(defun shell-forward-command (&optional arg)
+ "Move forward across ARG shell command(s). Does not cross lines.
+See `shell-command-regexp'."
+ (interactive "p")
+ (let ((limit (save-excursion (end-of-line nil) (point))))
+ (if (re-search-forward (concat shell-command-regexp "\\([;&|][\\s ]*\\)+")
+ limit 'move arg)
+ (skip-syntax-backward " "))))
+
+
+(defun shell-backward-command (&optional arg)
+ "Move backward across ARG shell command(s). Does not cross lines.
+See `shell-command-regexp'."
+ (interactive "p")
+ (let ((limit (save-excursion (comint-bol nil) (point))))
+ (if (> limit (point))
+ (save-excursion (beginning-of-line) (setq limit (point))))
+ (skip-syntax-backward " " limit)
+ (if (re-search-backward
+ (format "[;&|]+[\\s ]*\\(%s\\)" shell-command-regexp) limit 'move arg)
+ (progn (goto-char (match-beginning 1))
+ (skip-chars-forward ";&|")))))
+
+
+(defun shell-dynamic-complete-command ()
+ "Dynamically complete the command at point.
+This function is similar to `comint-dynamic-complete-filename', except that it
+searches `exec-path' (minus the trailing emacs library path) for completion
+candidates. Note that this may not be the same as the shell's idea of the
+path.
+
+Completion is dependent on the value of `shell-completion-execonly', plus
+those that effect file completion. See `shell-dynamic-complete-as-command'.
+
+Returns t if successful."
+ (interactive)
+ (let ((filename (comint-match-partial-filename)))
+ (if (and filename
+ (save-match-data (not (string-match "[~/]" filename)))
+ (eq (match-beginning 0)
+ (save-excursion (shell-backward-command 1) (point))))
+ (prog2 (message "Completing command name...")
+ (shell-dynamic-complete-as-command)))))
+
+
+(defun shell-dynamic-complete-as-command ()
+ "Dynamically complete at point as a command.
+See `shell-dynamic-complete-filename'. Returns t if successful."
+ (let* ((filename (or (comint-match-partial-filename) ""))
+ (pathnondir (file-name-nondirectory filename))
+ (paths (cdr (reverse exec-path)))
+ (cwd (file-name-as-directory (expand-file-name default-directory)))
+ (ignored-extensions
+ (and comint-completion-fignore
+ (mapconcat (function (lambda (x) (concat (regexp-quote x) "$")))
+ comint-completion-fignore "\\|")))
+ (path "") (comps-in-path ()) (file "") (filepath "") (completions ()))
+ ;; Go thru each path in the search path, finding completions.
+ (while paths
+ (setq path (file-name-as-directory (comint-directory (or (car paths) ".")))
+ comps-in-path (and (file-accessible-directory-p path)
+ (file-name-all-completions pathnondir path)))
+ ;; Go thru each completion found, to see whether it should be used.
+ (while comps-in-path
+ (setq file (car comps-in-path)
+ filepath (concat path file))
+ (if (and (not (member file completions))
+ (not (and ignored-extensions
+ (string-match ignored-extensions file)))
+ (or (string-equal path cwd)
+ (not (file-directory-p filepath)))
+ (or (null shell-completion-execonly)
+ (file-executable-p filepath)))
+ (setq completions (cons file completions)))
+ (setq comps-in-path (cdr comps-in-path)))
+ (setq paths (cdr paths)))
+ ;; OK, we've got a list of completions.
+ (let ((success (let ((comint-completion-addsuffix nil))
+ (comint-dynamic-simple-complete pathnondir completions))))
+ (if (and (memq success '(sole shortest)) comint-completion-addsuffix
+ (not (file-directory-p (comint-match-partial-filename))))
+ (insert " "))
+ success)))
+
+
+(defun shell-match-partial-variable ()
+ "Return the variable at point, or nil if non is found."
+ (save-excursion
+ (let ((limit (point)))
+ (if (re-search-backward "[^A-Za-z0-9_{}]" nil 'move)
+ (or (looking-at "\\$") (forward-char 1)))
+ ;; Anchor the search forwards.
+ (if (or (eolp) (looking-at "[^A-Za-z0-9_{}$]"))
+ nil
+ (re-search-forward "\\$?{?[A-Za-z0-9_]*}?" limit)
+ (buffer-substring (match-beginning 0) (match-end 0))))))
+
+
+(defun shell-dynamic-complete-environment-variable ()
+ "Dynamically complete the environment variable at point.
+Completes if after a variable, i.e., if it starts with a \"$\".
+See `shell-dynamic-complete-as-environment-variable'.
+
+This function is similar to `comint-dynamic-complete-filename', except that it
+searches `process-environment' for completion candidates. Note that this may
+not be the same as the interpreter's idea of variable names. The main problem
+with this type of completion is that `process-environment' is the environment
+which Emacs started with. Emacs does not track changes to the environment made
+by the interpreter. Perhaps it would be more accurate if this function was
+called `shell-dynamic-complete-process-environment-variable'.
+
+Returns non-nil if successful."
+ (interactive)
+ (let ((variable (shell-match-partial-variable)))
+ (if (and variable (string-match "^\\$" variable))
+ (prog2 (message "Completing variable name...")
+ (shell-dynamic-complete-as-environment-variable)))))
+
+
+(defun shell-dynamic-complete-as-environment-variable ()
+ "Dynamically complete at point as an environment variable.
+Used by `shell-dynamic-complete-environment-variable'.
+Uses `comint-dynamic-simple-complete'."
+ (let* ((var (or (shell-match-partial-variable) ""))
+ (variable (substring var (or (string-match "[^$({]\\|$" var) 0)))
+ (variables (mapcar (function (lambda (x)
+ (substring x 0 (string-match "=" x))))
+ process-environment))
+ (addsuffix comint-completion-addsuffix)
+ (comint-completion-addsuffix nil)
+ (success (comint-dynamic-simple-complete variable variables)))
+ (if (memq success '(sole shortest))
+ (let* ((var (shell-match-partial-variable))
+ (variable (substring var (string-match "[^$({]" var)))
+ (protection (cond ((string-match "{" var) "}")
+ ((string-match "(" var) ")")
+ (t "")))
+ (suffix (cond ((null addsuffix) "")
+ ((file-directory-p
+ (comint-directory (getenv variable))) "/")
+ (t " "))))
+ (insert protection suffix)))
+ success))
+
+
+(defun shell-replace-by-expanded-directory ()
+ "Expand directory stack reference before point.
+Directory stack references are of the form \"=digit\" or \"=-\".
+See `default-directory' and `shell-dirstack'.
+
+Returns t if successful."
+ (interactive)
+ (if (comint-match-partial-filename)
+ (save-excursion
+ (goto-char (match-beginning 0))
+ (let ((stack (cons default-directory shell-dirstack))
+ (index (cond ((looking-at "=-/?")
+ (length shell-dirstack))
+ ((looking-at "=\\([0-9]+\\)")
+ (string-to-number
+ (buffer-substring
+ (match-beginning 1) (match-end 1)))))))
+ (cond ((null index)
+ nil)
+ ((>= index (length stack))
+ (error "Directory stack not that deep."))
+ (t
+ (replace-match (file-name-as-directory (nth index stack)) t t)
+ (message "Directory item: %d" index)
+ t))))))
+\f
+(defun shell-strip-ctrl-m (&optional string)
+ "Strip trailing `^M' characters from the current output group.
+This function could be in the list `comint-output-filter-functions' or bound to
+a key."
+ (interactive)
+ (let ((pmark (process-mark (get-buffer-process (current-buffer))))
+ (ctrl-m (concat (char-to-string 13) "$")))
+ (save-excursion
+ (goto-char
+ (if (interactive-p) comint-last-input-end comint-last-output-start))
+ (while (re-search-forward ctrl-m pmark t)
+ (replace-match "" t t)))))
+\f
(provide 'shell)
;;; shell.el ends here