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- ;;; shell.el --- specialized comint.el for running the shell.
-
- ;; Copyright (C) 1988, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
-
- ;; Author: Olin Shivers <shivers@cs.cmu.edu>
- ;; Maintainer: Simon Marshall <simon@gnu.ai.mit.edu>
- ;; Keywords: processes
-
- ;; 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:
-
- ;; 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 (simon@gnu.ai.mit.edu)
-
- ;; This file defines a a shell-in-a-buffer package (shell mode) built
- ;; on top of comint mode. This is actually cmushell with things
- ;; renamed to replace its counterpart in Emacs 18. cmushell is more
- ;; featureful, robust, and uniform than the Emacs 18 version.
-
- ;; Since this mode is built on top of the general command-interpreter-in-
- ;; a-buffer mode (comint mode), it shares a common base functionality,
- ;; and a common set of bindings, with all modes derived from comint mode.
- ;; This makes these modes easier to use.
-
- ;; For documentation on the functionality provided by comint mode, and
- ;; the hooks available for customising it, see the file comint.el.
- ;; For further information on shell mode, see the comments below.
-
- ;; Needs fixin:
- ;; When sending text from a source file to a subprocess, the process-mark can
- ;; move off the window, so you can lose sight of the process interactions.
- ;; Maybe I should ensure the process mark is in the window when I send
- ;; text to the process? Switch selectable?
-
- ;; YOUR .EMACS FILE
- ;;=============================================================================
- ;; Some suggestions for your .emacs file.
- ;;
- ;; ;; Define M-# to run some strange command:
- ;; (eval-after-load "shell"
- ;; '(define-key shell-mode-map "\M-#" 'shells-dynamic-spell))
-
- ;; Brief Command Documentation:
- ;;============================================================================
- ;; Comint Mode Commands: (common to shell and all comint-derived modes)
- ;;
- ;; m-p comint-previous-input Cycle backwards in input history
- ;; m-n comint-next-input Cycle forwards
- ;; m-r comint-previous-matching-input Previous input matching a regexp
- ;; m-s comint-next-matching-input Next input that matches
- ;; m-c-l comint-show-output Show last batch of process output
- ;; return comint-send-input
- ;; c-d comint-delchar-or-maybe-eof Delete char unless at end of buff.
- ;; c-c c-a comint-bol Beginning of line; skip prompt
- ;; c-c c-u comint-kill-input ^u
- ;; c-c c-w backward-kill-word ^w
- ;; c-c c-c comint-interrupt-subjob ^c
- ;; c-c c-z comint-stop-subjob ^z
- ;; 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
- ;; comint-mode-hook is the comint mode hook.
-
- ;; Shell Mode Commands:
- ;; 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
- ;; comint-strip-ctrl-m Remove trailing ^Ms from output
- ;;
- ;; The shell mode hook is shell-mode-hook
- ;; comint-prompt-regexp is initialised to shell-prompt-pattern, for backwards
- ;; compatibility.
-
- ;; Read the rest of this file for more information.
-
- ;;; Code:
-
- (require 'comint)
-
- ;;; Customization and Buffer Variables
-
- ;;;###autoload
- (defvar shell-prompt-pattern "^[^#$%>\n]*[#$%>] *"
- "Regexp to match prompts in the inferior shell.
- Defaults to \"^[^#$%>\\n]*[#$%>] *\", which works pretty well.
- This variable is used to initialise `comint-prompt-regexp' in the
- shell buffer.
-
- The pattern should probably not match more than one line. If it does,
- Shell mode may become confused trying to distinguish prompt from input
- on lines which don't start with a prompt.
-
- 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 value may depend on the operating system or shell.
-
- This is a fine thing to set in your `.emacs' file.")
-
- (defvar shell-file-name-chars
- (if (memq system-type '(ms-dos windows-nt))
- "~/A-Za-z0-9_^$!#%&{}@`'.()-"
- "~/A-Za-z0-9+@:_.$#%,={}-")
- "String of characters valid in a file name.
- This variable is used to initialize `comint-file-name-chars' in the
- shell buffer. The value may depend on the operating system or shell.
-
- This is a fine thing to set in your `.emacs' file.")
-
- (defvar shell-file-name-quote-list
- (if (memq system-type '(ms-dos windows-nt))
- nil
- (append shell-delimiter-argument-list '(?\ ?\* ?\! ?\" ?\' ?\`)))
- "List of characters to quote when in a file name.
- This variable is used to initialize `comint-file-name-quote-list' in the
- shell buffer. The value may depend on the operating system or shell.
-
- 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 "[^;&|\n]+"
- "*Regexp to match a single command within a pipeline.
- This is used for directory tracking and does not do a perfect job.")
-
- (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.")
-
- (defvar shell-chdrive-regexp
- (if (memq system-type '(ms-dos windows-nt))
- ; NetWare allows the five chars between upper and lower alphabetics.
- "[]a-zA-Z^_`\\[\\\\]:"
- nil)
- "*If non-nil, is regexp used to track drive changes.")
-
- (defvar explicit-shell-file-name nil
- "*If non-nil, is file name to use for explicitly requested inferior shell.")
-
- (defvar explicit-csh-args
- (if (eq system-type 'hpux)
- ;; -T persuades HP's csh not to think it is smarter
- ;; than us about what terminal modes to use.
- '("-i" "-T")
- '("-i"))
- "*Args passed to inferior shell by M-x shell, if the shell is csh.
- Value is a list of strings, which may be nil.")
-
- (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 nil
- "Command used by `shell-resync-dir' to query the shell.")
-
- (defvar shell-mode-map nil)
- (cond ((not shell-mode-map)
- (setq shell-mode-map (nconc (make-sparse-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-filename-completions)
- (define-key shell-mode-map [menu-bar completion]
- (copy-keymap (lookup-key comint-mode-map [menu-bar completion])))
- (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.")
-
- (defvar shell-font-lock-keywords
- (list (cons shell-prompt-pattern 'font-lock-keyword-face)
- '("[ \t]\\([+-][^ \t\n]+\\)" 1 font-lock-comment-face)
- '("^[^ \t\n]+:.*" . font-lock-string-face)
- '("^\\[[1-9][0-9]*\\]" . font-lock-string-face))
- "Additional expressions to highlight in Shell mode.")
-
- ;;; Basic Procedures
-
- (defun shell-mode ()
- "Major mode for interacting with an inferior shell.
- \\[comint-send-input] after the end of the process' output sends the text from
- the end of process to the end of the current line.
- \\[comint-send-input] before end of process output copies the current line minus the prompt to
- the end of the buffer and sends it (\\[comint-copy-old-input] just copies the current line).
- \\[send-invisible] reads a line of text without echoing it, and sends it to
- the shell. This is useful for entering passwords. Or, add the function
- `comint-watch-for-password-prompt' to `comint-output-filter-functions'.
-
- If you want to make multiple shell buffers, rename the `*shell*' buffer
- using \\[rename-buffer] or \\[rename-uniquely] and start a new shell.
-
- If you want to make shell buffers limited in length, add the function
- `comint-truncate-buffer' to `comint-output-filter-functions'.
-
- If you accidentally suspend your process, use \\[comint-continue-subjob]
- to continue it.
-
- `cd', `pushd' and `popd' commands given to the shell are watched by Emacs to
- keep this buffer's default directory the same as the shell's working directory.
- While directory tracking is enabled, the shell's working directory is displayed
- by \\[list-buffers] or \\[mouse-buffer-menu] in the `File' field.
- \\[dirs] queries the shell and resyncs Emacs' idea of what the current
- directory stack is.
- \\[dirtrack-toggle] turns directory tracking on and off.
-
- \\{shell-mode-map}
- Customization: Entry to this mode runs the hooks on `comint-mode-hook' and
- `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-chdrive-regexp', `shell-pushd-regexp'
- and `shell-popd-regexp' 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 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-file-name-chars shell-file-name-chars)
- (setq comint-file-name-quote-list shell-file-name-quote-list)
- (setq comint-dynamic-complete-functions shell-dynamic-complete-functions)
- (make-local-variable 'paragraph-start)
- (setq paragraph-start comint-prompt-regexp)
- (make-local-variable 'font-lock-defaults)
- (setq font-lock-defaults '(shell-font-lock-keywords t))
- (make-local-variable 'shell-dirstack)
- (setq shell-dirstack nil)
- (setq shell-last-dir nil)
- (make-local-variable 'shell-dirtrackp)
- (setq shell-dirtrackp t)
- (add-hook 'comint-input-filter-functions 'shell-directory-tracker nil t)
- (setq comint-input-autoexpand shell-input-autoexpand)
- (make-local-variable 'list-buffers-directory)
- (setq list-buffers-directory (expand-file-name default-directory))
- ;; shell-dependent assignments.
- (let ((shell (file-name-nondirectory (car
- (process-command (get-buffer-process (current-buffer)))))))
- (setq comint-input-ring-file-name
- (or (getenv "HISTFILE")
- (cond ((string-equal shell "bash") "~/.bash_history")
- ((string-equal shell "ksh") "~/.sh_history")
- (t "~/.history"))))
- (if (or (equal comint-input-ring-file-name "")
- (equal (file-truename comint-input-ring-file-name) "/dev/null"))
- (setq comint-input-ring-file-name nil))
- (setq shell-dirstack-query
- (cond ((string-equal shell "sh") "pwd")
- ((string-equal shell "ksh") "echo $PWD ~-")
- (t "dirs"))))
- (run-hooks 'shell-mode-hook)
- (comint-read-input-ring t))
-
- ;;;###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*'.
- 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.
- If a file `~/.emacs_SHELLNAME' exists, it is given as initial input
- (Note that this may lose due to a timing error if the shell
- discards input when it starts up.)
- The buffer is put in Shell mode, giving commands for sending input
- and controlling the subjobs of the shell. See `shell-mode'.
- See also the variable `shell-prompt-pattern'.
-
- The shell file name (sans directories) is used to make a symbol name
- such as `explicit-csh-args'. If that symbol is a variable,
- its value is used as a list of arguments when invoking the shell.
- Otherwise, one argument `-i' is passed to the shell.
-
- \(Type \\[describe-mode] in the shell buffer for a list of commands.)"
- (interactive)
- (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")))
- shell-buffer)
- (save-excursion
- (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"))))
- (setq shell-buffer (current-buffer))
- (shell-mode))
- (pop-to-buffer shell-buffer))
- (pop-to-buffer "*shell*")))
-
- ;;; Don't do this when shell.el is loaded, only while dumping.
- ;;;###autoload (add-hook 'same-window-buffer-names "*shell*")
-
- ;;; Directory tracking
- ;;;
- ;;; This code provides the shell mode input sentinel
- ;;; SHELL-DIRECTORY-TRACKER
- ;;; that tracks cd, pushd, and popd commands issued to the shell, and
- ;;; changes the current directory of the shell buffer accordingly.
- ;;;
- ;;; 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 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
- ;;; separate working directories, and some have commands for manipulating
- ;;; their w.d.'s (e.g., the lcd command in ftp). Some of these programs have
- ;;; commands that do *not* affect the current w.d. at all, but look like they
- ;;; do (e.g., the cd command in ftp). In shells that allow you job
- ;;; control, you can switch between jobs, all having different w.d.'s. So
- ;;; simply saying %3 can shift your w.d..
- ;;;
- ;;; The solution is to relax, not stress out about it, and settle for
- ;;; a hack that works pretty well in typical circumstances. Remember
- ;;; that a half-assed solution is more in keeping with the spirit of Unix,
- ;;; anyway. Blech.
- ;;;
- ;;; One good hack not implemented here for users of programmable shells
- ;;; is to program up the shell w.d. manipulation commands to output
- ;;; a coded command sequence to the tty. Something like
- ;;; ESC | <cwd> |
- ;;; where <cwd> is the new current working directory. Then trash the
- ;;; directory tracking machinery currently used in this package, and
- ;;; replace it with a process filter that watches for and strips out
- ;;; these messages.
-
- (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.
- It watches for cd, pushd and popd commands and sets the buffer's
- default directory to track these commands.
-
- 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-chdrive-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 "^[; \t]*" 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 ((string-match (concat "\\`\\(" shell-popd-regexp
- "\\)\\($\\|[ \t]\\)")
- cmd)
- (shell-process-popd (comint-substitute-in-file-name arg1)))
- ((string-match (concat "\\`\\(" shell-pushd-regexp
- "\\)\\($\\|[ \t]\\)")
- cmd)
- (shell-process-pushd (comint-substitute-in-file-name arg1)))
- ((string-match (concat "\\`\\(" shell-cd-regexp
- "\\)\\($\\|[ \t]\\)")
- cmd)
- (shell-process-cd (comint-substitute-in-file-name arg1)))
- ((and shell-chdrive-regexp
- (string-match (concat "\\`\\(" shell-chdrive-regexp
- "\\)\\($\\|[ \t]\\)")
- cmd))
- (shell-process-cd (comint-substitute-in-file-name cmd))))
- (setq start (progn (string-match "[; \t]*" str end) ; skip again
- (match-end 0)))))
- (error "Couldn't cd"))))
-
- ;;; popd [+n]
- (defun shell-process-popd (arg)
- (let ((num (or (shell-extract-num arg) 0)))
- (cond ((and num (= num 0) shell-dirstack)
- (shell-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.
- (defun shell-prefixed-directory-name (dir)
- (if (= (length comint-file-name-prefix) 0)
- dir
- (if (file-name-absolute-p dir)
- ;; The name is absolute, so prepend the prefix.
- (concat comint-file-name-prefix dir)
- ;; For relative name we assume default-directory already has the prefix.
- (expand-file-name dir))))
-
- ;;; cd [dir]
- (defun shell-process-cd (arg)
- (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)
- (shell-cd new-dir)
- (shell-dirstack-message)))
-
- ;;; pushd [+n | dir]
- (defun shell-process-pushd (arg)
- (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))
- (shell-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)
- (shell-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)))
- (shell-cd (car new-ds))
- (setq shell-dirstack (cdr new-ds))
- (shell-dirstack-message)))))
- (t
- ;; pushd <dir>
- (let ((old-wd default-directory))
- (shell-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)
- (and (string-match "^\\+[1-9][0-9]*$" str)
- (string-to-int str)))
-
-
- (defun shell-dirtrack-toggle ()
- "Turn directory tracking on and off in a shell buffer."
- (interactive)
- (if (setq shell-dirtrackp (not shell-dirtrackp))
- (setq list-buffers-directory default-directory)
- (setq list-buffers-directory nil))
- (message "Directory tracking %s" (if shell-dirtrackp "ON" "OFF")))
-
- ;;; For your typing convenience:
- (defalias 'dirtrack-toggle 'shell-dirtrack-toggle)
-
- (defun shell-cd (dir)
- "Do normal `cd' to DIR, and set `list-buffers-directory'."
- (if shell-dirtrackp
- (setq list-buffers-directory (file-name-as-directory
- (expand-file-name dir))))
- (cd dir))
-
- (defun shell-resync-dirs ()
- "Resync the buffer's idea of the current directory stack.
- This command queries the shell with the command bound to
- `shell-dirstack-query' (default \"dirs\"), reads the next
- line output and parses it to form the new directory stack.
- DON'T issue this command unless the buffer is at a shell prompt.
- Also, note that if some other subprocess decides to do output
- immediately after the query, its output will be taken as the
- new directory stack -- you lose. If this happens, just do the
- command again."
- (interactive)
- (let* ((proc (get-buffer-process (current-buffer)))
- (pmark (process-mark proc)))
- (goto-char pmark)
- (insert shell-dirstack-query) (insert "\n")
- (sit-for 0) ; force redisplay
- (comint-send-string proc shell-dirstack-query)
- (comint-send-string proc "\n")
- (set-marker pmark (point))
- (let ((pt (point))) ; wait for 1 line
- ;; This extra newline prevents the user's pending input from spoofing us.
- (insert "\n") (backward-char 1)
- (while (not (looking-at ".+\n"))
- (accept-process-output proc)
- (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) (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 (concat comint-file-name-prefix
- (substring dl (match-beginning 1)
- (match-end 1)))
- ds))
- (setq i (match-end 0)))
- (let ((ds (nreverse ds)))
- (condition-case nil
- (progn (shell-cd (car ds))
- (setq shell-dirstack (cdr ds)
- shell-last-dir (car shell-dirstack))
- (shell-dirstack-message))
- (error (message "Couldn't cd.")))))))
-
- ;;; For your typing convenience:
- (defalias 'dirs 'shell-resync-dirs)
-
-
- ;;; Show the current dirstack on the message line.
- ;;; Pretty up dirs a bit by changing "/usr/jqr/foo" to "~/foo".
- ;;; (This isn't necessary if the dirlisting is generated with a simple "dirs".)
- ;;; 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))
- (home (expand-file-name (concat comint-file-name-prefix "~/")))
- (homelen (length home)))
- (while ds
- (let ((dir (car ds)))
- (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 "%s" msg)))
-
- (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 "\\([;&|][\t ]*\\)+")
- 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 "[;&|]+[\t ]*\\(%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 shell variable at point, or nil if none 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))))))
-
- (provide 'shell)
-
- ;;; shell.el ends here
-