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5336e829 | 1 | ;;; shell.el --- specialized comint.el for running the shell. |
5109bfb0 | 2 | |
221ca406 | 3 | ;; Copyright (C) 1988, 1993, 1994, 1995, 1996 Free Software Foundation, Inc. |
6d74b528 | 4 | |
630cc463 | 5 | ;; Author: Olin Shivers <shivers@cs.cmu.edu> |
e9933cb1 | 6 | ;; Maintainer: Simon Marshall <simon@gnu.ai.mit.edu> |
d7b4d18f | 7 | ;; Keywords: processes |
630cc463 | 8 | |
5109bfb0 | 9 | ;; This file is part of GNU Emacs. |
c88ab9ce | 10 | |
5109bfb0 KH |
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify |
12 | ;; it under the terms of the GNU General Public License as published by | |
13 | ;; the Free Software Foundation; either version 2, or (at your option) | |
14 | ;; any later version. | |
c88ab9ce | 15 | |
5109bfb0 KH |
16 | ;; GNU Emacs is distributed in the hope that it will be useful, |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
c88ab9ce | 20 | |
5109bfb0 | 21 | ;; You should have received a copy of the GNU General Public License |
b578f267 EN |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
23 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
24 | ;; Boston, MA 02111-1307, USA. | |
be9b65ac | 25 | |
630cc463 ER |
26 | ;;; Commentary: |
27 | ||
b578f267 EN |
28 | ;; Please send me bug reports, bug fixes, and extensions, so that I can |
29 | ;; merge them into the master source. | |
30 | ;; - Olin Shivers (shivers@cs.cmu.edu) | |
31 | ;; - Simon Marshall (simon@gnu.ai.mit.edu) | |
be9b65ac | 32 | |
b578f267 EN |
33 | ;; This file defines a a shell-in-a-buffer package (shell mode) built |
34 | ;; on top of comint mode. This is actually cmushell with things | |
35 | ;; renamed to replace its counterpart in Emacs 18. cmushell is more | |
36 | ;; featureful, robust, and uniform than the Emacs 18 version. | |
be9b65ac | 37 | |
b578f267 EN |
38 | ;; Since this mode is built on top of the general command-interpreter-in- |
39 | ;; a-buffer mode (comint mode), it shares a common base functionality, | |
40 | ;; and a common set of bindings, with all modes derived from comint mode. | |
41 | ;; This makes these modes easier to use. | |
be9b65ac | 42 | |
b578f267 EN |
43 | ;; For documentation on the functionality provided by comint mode, and |
44 | ;; the hooks available for customising it, see the file comint.el. | |
45 | ;; For further information on shell mode, see the comments below. | |
be9b65ac | 46 | |
b578f267 EN |
47 | ;; Needs fixin: |
48 | ;; When sending text from a source file to a subprocess, the process-mark can | |
49 | ;; move off the window, so you can lose sight of the process interactions. | |
50 | ;; Maybe I should ensure the process mark is in the window when I send | |
51 | ;; text to the process? Switch selectable? | |
be9b65ac | 52 | |
a9ec2adb JB |
53 | ;; YOUR .EMACS FILE |
54 | ;;============================================================================= | |
55 | ;; Some suggestions for your .emacs file. | |
56 | ;; | |
0b3c9cf1 SM |
57 | ;; ;; Define M-# to run some strange command: |
58 | ;; (eval-after-load "shell" | |
59 | ;; '(define-key shell-mode-map "\M-#" 'shells-dynamic-spell)) | |
a9ec2adb | 60 | \f |
b578f267 EN |
61 | ;; Brief Command Documentation: |
62 | ;;============================================================================ | |
63 | ;; Comint Mode Commands: (common to shell and all comint-derived modes) | |
64 | ;; | |
65 | ;; m-p comint-previous-input Cycle backwards in input history | |
66 | ;; m-n comint-next-input Cycle forwards | |
67 | ;; m-r comint-previous-matching-input Previous input matching a regexp | |
68 | ;; m-s comint-next-matching-input Next input that matches | |
69 | ;; m-c-l comint-show-output Show last batch of process output | |
70 | ;; return comint-send-input | |
71 | ;; c-d comint-delchar-or-maybe-eof Delete char unless at end of buff. | |
72 | ;; c-c c-a comint-bol Beginning of line; skip prompt | |
73 | ;; c-c c-u comint-kill-input ^u | |
74 | ;; c-c c-w backward-kill-word ^w | |
75 | ;; c-c c-c comint-interrupt-subjob ^c | |
76 | ;; c-c c-z comint-stop-subjob ^z | |
77 | ;; c-c c-\ comint-quit-subjob ^\ | |
78 | ;; c-c c-o comint-kill-output Delete last batch of process output | |
79 | ;; c-c c-r comint-show-output Show last batch of process output | |
80 | ;; c-c c-h comint-dynamic-list-input-ring List input history | |
81 | ;; send-invisible Read line w/o echo & send to proc | |
82 | ;; comint-continue-subjob Useful if you accidentally suspend | |
83 | ;; top-level job | |
84 | ;; comint-mode-hook is the comint mode hook. | |
85 | ||
86 | ;; Shell Mode Commands: | |
87 | ;; shell Fires up the shell process | |
88 | ;; tab comint-dynamic-complete Complete filename/command/history | |
89 | ;; m-? comint-dynamic-list-filename-completions | |
90 | ;; List completions in help buffer | |
91 | ;; m-c-f shell-forward-command Forward a shell command | |
92 | ;; m-c-b shell-backward-command Backward a shell command | |
93 | ;; dirs Resync the buffer's dir stack | |
94 | ;; dirtrack-toggle Turn dir tracking on/off | |
95 | ;; comint-strip-ctrl-m Remove trailing ^Ms from output | |
96 | ;; | |
97 | ;; The shell mode hook is shell-mode-hook | |
98 | ;; comint-prompt-regexp is initialised to shell-prompt-pattern, for backwards | |
99 | ;; compatibility. | |
a9ec2adb | 100 | |
b578f267 | 101 | ;; Read the rest of this file for more information. |
a9ec2adb | 102 | \f |
630cc463 ER |
103 | ;;; Code: |
104 | ||
105 | (require 'comint) | |
106 | ||
b578f267 EN |
107 | ;;; Customization and Buffer Variables |
108 | ||
c88ab9ce | 109 | ;;;###autoload |
ac75ef20 | 110 | (defvar shell-prompt-pattern "^[^#$%>\n]*[#$%>] *" |
a9ec2adb | 111 | "Regexp to match prompts in the inferior shell. |
ac75ef20 | 112 | Defaults to \"^[^#$%>\\n]*[#$%>] *\", which works pretty well. |
24fdffaa | 113 | This variable is used to initialise `comint-prompt-regexp' in the |
a9ec2adb JB |
114 | shell buffer. |
115 | ||
ac75ef20 | 116 | The pattern should probably not match more than one line. If it does, |
221ca406 | 117 | Shell mode may become confused trying to distinguish prompt from input |
ac75ef20 JB |
118 | on lines which don't start with a prompt. |
119 | ||
24fdffaa | 120 | This is a fine thing to set in your `.emacs' file.") |
a9ec2adb | 121 | |
e11284d5 RS |
122 | (defvar shell-completion-fignore nil |
123 | "*List of suffixes to be disregarded during file/command completion. | |
124 | This variable is used to initialize `comint-completion-fignore' in the shell | |
125 | buffer. The default is nil, for compatibility with most shells. | |
126 | Some people like (\"~\" \"#\" \"%\"). | |
127 | ||
128 | This is a fine thing to set in your `.emacs' file.") | |
129 | ||
56eb1060 | 130 | (defvar shell-delimiter-argument-list '(?\| ?& ?< ?> ?\( ?\) ?\;) |
d76b71af | 131 | "List of characters to recognise as separate arguments. |
56eb1060 | 132 | This variable is used to initialize `comint-delimiter-argument-list' in the |
39d1a2ce SM |
133 | shell buffer. The value may depend on the operating system or shell. |
134 | ||
135 | This is a fine thing to set in your `.emacs' file.") | |
136 | ||
76f63ea0 | 137 | (defvar shell-file-name-chars |
39d1a2ce SM |
138 | (if (memq system-type '(ms-dos windows-nt)) |
139 | "~/A-Za-z0-9_^$!#%&{}@`'.()-" | |
140 | "~/A-Za-z0-9+@:_.$#%,={}-") | |
76f63ea0 RS |
141 | "String of characters valid in a file name. |
142 | This variable is used to initialize `comint-file-name-chars' in the | |
39d1a2ce | 143 | shell buffer. The value may depend on the operating system or shell. |
d76b71af RS |
144 | |
145 | This is a fine thing to set in your `.emacs' file.") | |
146 | ||
7b4c6503 | 147 | (defvar shell-file-name-quote-list |
39d1a2ce SM |
148 | (if (memq system-type '(ms-dos windows-nt)) |
149 | nil | |
150 | (append shell-delimiter-argument-list '(?\ ?\* ?\! ?\" ?\' ?\`))) | |
7b4c6503 SM |
151 | "List of characters to quote when in a file name. |
152 | This variable is used to initialize `comint-file-name-quote-list' in the | |
39d1a2ce | 153 | shell buffer. The value may depend on the operating system or shell. |
7b4c6503 SM |
154 | |
155 | This is a fine thing to set in your `.emacs' file.") | |
156 | ||
988a4d60 RS |
157 | (defvar shell-dynamic-complete-functions |
158 | '(comint-replace-by-expanded-history | |
159 | shell-dynamic-complete-environment-variable | |
160 | shell-dynamic-complete-command | |
161 | shell-replace-by-expanded-directory | |
162 | comint-dynamic-complete-filename) | |
163 | "List of functions called to perform completion. | |
164 | This variable is used to initialise `comint-dynamic-complete-functions' in the | |
165 | shell buffer. | |
166 | ||
167 | This is a fine thing to set in your `.emacs' file.") | |
168 | ||
a8e0effb RS |
169 | (defvar shell-command-regexp "[^;&|\n]+" |
170 | "*Regexp to match a single command within a pipeline. | |
171 | This is used for directory tracking and does not do a perfect job.") | |
d76b71af RS |
172 | |
173 | (defvar shell-completion-execonly t | |
174 | "*If non-nil, use executable files only for completion candidates. | |
5394cb44 | 175 | This mirrors the optional behavior of tcsh. |
d76b71af RS |
176 | |
177 | Detecting executability of files may slow command completion considerably.") | |
178 | ||
be9b65ac DL |
179 | (defvar shell-popd-regexp "popd" |
180 | "*Regexp to match subshell commands equivalent to popd.") | |
181 | ||
182 | (defvar shell-pushd-regexp "pushd" | |
183 | "*Regexp to match subshell commands equivalent to pushd.") | |
184 | ||
d76b71af RS |
185 | (defvar shell-pushd-tohome nil |
186 | "*If non-nil, make pushd with no arg behave as \"pushd ~\" (like cd). | |
5394cb44 | 187 | This mirrors the optional behavior of tcsh.") |
d76b71af RS |
188 | |
189 | (defvar shell-pushd-dextract nil | |
190 | "*If non-nil, make \"pushd +n\" pop the nth dir to the stack top. | |
5394cb44 | 191 | This mirrors the optional behavior of tcsh.") |
d76b71af RS |
192 | |
193 | (defvar shell-pushd-dunique nil | |
194 | "*If non-nil, make pushd only add unique directories to the stack. | |
5394cb44 | 195 | This mirrors the optional behavior of tcsh.") |
d76b71af | 196 | |
be9b65ac DL |
197 | (defvar shell-cd-regexp "cd" |
198 | "*Regexp to match subshell commands equivalent to cd.") | |
199 | ||
32d01212 RS |
200 | (defvar shell-chdrive-regexp |
201 | (if (memq system-type '(ms-dos windows-nt)) | |
202 | ; NetWare allows the five chars between upper and lower alphabetics. | |
203 | "[]a-zA-Z^_`\\[\\\\]:" | |
204 | nil) | |
205 | "*If non-nil, is regexp used to track drive changes.") | |
206 | ||
be9b65ac DL |
207 | (defvar explicit-shell-file-name nil |
208 | "*If non-nil, is file name to use for explicitly requested inferior shell.") | |
209 | ||
210 | (defvar explicit-csh-args | |
211 | (if (eq system-type 'hpux) | |
212 | ;; -T persuades HP's csh not to think it is smarter | |
213 | ;; than us about what terminal modes to use. | |
214 | '("-i" "-T") | |
215 | '("-i")) | |
216 | "*Args passed to inferior shell by M-x shell, if the shell is csh. | |
217 | Value is a list of strings, which may be nil.") | |
218 | ||
4f99443b RS |
219 | (defvar shell-input-autoexpand 'history |
220 | "*If non-nil, expand input command history references on completion. | |
221 | This mirrors the optional behavior of tcsh (its autoexpand and histlit). | |
222 | ||
223 | If the value is `input', then the expansion is seen on input. | |
224 | If the value is `history', then the expansion is only when inserting | |
225 | into the buffer's input ring. See also `comint-magic-space' and | |
226 | `comint-dynamic-complete'. | |
227 | ||
228 | This variable supplies a default for `comint-input-autoexpand', | |
229 | for Shell mode only.") | |
230 | ||
be9b65ac | 231 | (defvar shell-dirstack nil |
c88ab9ce ER |
232 | "List of directories saved by pushd in this buffer's shell. |
233 | Thus, this does not include the shell's current directory.") | |
be9b65ac | 234 | |
b493a9b2 RS |
235 | (defvar shell-dirtrackp t |
236 | "Non-nil in a shell buffer means directory tracking is enabled.") | |
237 | ||
fa8f1b25 ER |
238 | (defvar shell-last-dir nil |
239 | "Keep track of last directory for ksh `cd -' command.") | |
240 | ||
c63e83a4 | 241 | (defvar shell-dirstack-query nil |
24fdffaa | 242 | "Command used by `shell-resync-dir' to query the shell.") |
be9b65ac | 243 | |
9376442d | 244 | (defvar shell-mode-map nil) |
be9b65ac | 245 | (cond ((not shell-mode-map) |
1ed30e75 | 246 | (setq shell-mode-map (nconc (make-sparse-keymap) comint-mode-map)) |
d76b71af RS |
247 | (define-key shell-mode-map "\C-c\C-f" 'shell-forward-command) |
248 | (define-key shell-mode-map "\C-c\C-b" 'shell-backward-command) | |
be9b65ac | 249 | (define-key shell-mode-map "\t" 'comint-dynamic-complete) |
d76b71af | 250 | (define-key shell-mode-map "\M-?" |
988a4d60 | 251 | 'comint-dynamic-list-filename-completions) |
1ed30e75 RS |
252 | (define-key shell-mode-map [menu-bar completion] |
253 | (copy-keymap (lookup-key comint-mode-map [menu-bar completion]))) | |
5109bfb0 KH |
254 | (define-key-after (lookup-key shell-mode-map [menu-bar completion]) |
255 | [complete-env-variable] '("Complete Env. Variable Name" . | |
256 | shell-dynamic-complete-environment-variable) | |
257 | 'complete-file) | |
258 | (define-key-after (lookup-key shell-mode-map [menu-bar completion]) | |
259 | [expand-directory] '("Expand Directory Reference" . | |
260 | shell-replace-by-expanded-directory) | |
261 | 'complete-expand))) | |
be9b65ac DL |
262 | |
263 | (defvar shell-mode-hook '() | |
24fdffaa | 264 | "*Hook for customising Shell mode.") |
be9b65ac | 265 | |
5945a1f7 RS |
266 | (defvar shell-font-lock-keywords |
267 | (list (cons shell-prompt-pattern 'font-lock-keyword-face) | |
268 | '("[ \t]\\([+-][^ \t\n]+\\)" 1 font-lock-comment-face) | |
86a21134 | 269 | '("^[^ \t\n]+:.*" . font-lock-string-face) |
5945a1f7 RS |
270 | '("^\\[[1-9][0-9]*\\]" . font-lock-string-face)) |
271 | "Additional expressions to highlight in Shell mode.") | |
be9b65ac DL |
272 | \f |
273 | ;;; Basic Procedures | |
be9b65ac DL |
274 | |
275 | (defun shell-mode () | |
276 | "Major mode for interacting with an inferior shell. | |
8079b590 SM |
277 | \\[comint-send-input] after the end of the process' output sends the text from |
278 | the end of process to the end of the current line. | |
279 | \\[comint-send-input] before end of process output copies the current line minus the prompt to | |
280 | the end of the buffer and sends it (\\[comint-copy-old-input] just copies the current line). | |
e9933cb1 | 281 | \\[send-invisible] reads a line of text without echoing it, and sends it to |
56783585 RS |
282 | the shell. This is useful for entering passwords. Or, add the function |
283 | `comint-watch-for-password-prompt' to `comint-output-filter-functions'. | |
be9b65ac | 284 | |
e9933cb1 SM |
285 | If you want to make multiple shell buffers, rename the `*shell*' buffer |
286 | using \\[rename-buffer] or \\[rename-uniquely] and start a new shell. | |
287 | ||
8079b590 | 288 | If you want to make shell buffers limited in length, add the function |
4841acc4 | 289 | `comint-truncate-buffer' to `comint-output-filter-functions'. |
8079b590 | 290 | |
be9b65ac DL |
291 | If you accidentally suspend your process, use \\[comint-continue-subjob] |
292 | to continue it. | |
293 | ||
e9933cb1 SM |
294 | `cd', `pushd' and `popd' commands given to the shell are watched by Emacs to |
295 | keep this buffer's default directory the same as the shell's working directory. | |
0b3c9cf1 SM |
296 | While directory tracking is enabled, the shell's working directory is displayed |
297 | by \\[list-buffers] or \\[mouse-buffer-menu] in the `File' field. | |
e9933cb1 | 298 | \\[dirs] queries the shell and resyncs Emacs' idea of what the current |
be9b65ac | 299 | directory stack is. |
e9933cb1 | 300 | \\[dirtrack-toggle] turns directory tracking on and off. |
be9b65ac DL |
301 | |
302 | \\{shell-mode-map} | |
24fdffaa | 303 | Customization: Entry to this mode runs the hooks on `comint-mode-hook' and |
988a4d60 | 304 | `shell-mode-hook' (in that order). Before each input, the hooks on |
ba02c167 RS |
305 | `comint-input-filter-functions' are run. After each shell output, the hooks |
306 | on `comint-output-filter-functions' are run. | |
be9b65ac | 307 | |
32d01212 RS |
308 | Variables `shell-cd-regexp', `shell-chdrive-regexp', `shell-pushd-regexp' |
309 | and `shell-popd-regexp' are used to match their respective commands, | |
310 | while `shell-pushd-tohome', `shell-pushd-dextract' and `shell-pushd-dunique' | |
311 | control the behavior of the relevant command. | |
d76b71af | 312 | |
e11284d5 RS |
313 | Variables `comint-completion-autolist', `comint-completion-addsuffix', |
314 | `comint-completion-recexact' and `comint-completion-fignore' control the | |
315 | behavior of file name, command name and variable name completion. Variable | |
316 | `shell-completion-execonly' controls the behavior of command name completion. | |
317 | Variable `shell-completion-fignore' is used to initialise the value of | |
318 | `comint-completion-fignore'. | |
d76b71af RS |
319 | |
320 | Variables `comint-input-ring-file-name' and `comint-input-autoexpand' control | |
321 | the initialisation of the input ring history, and history expansion. | |
322 | ||
ba02c167 | 323 | Variables `comint-output-filter-functions', a hook, and |
e11284d5 | 324 | `comint-scroll-to-bottom-on-input' and `comint-scroll-to-bottom-on-output' |
988a4d60 RS |
325 | control whether input and output cause the window to scroll to the end of the |
326 | buffer." | |
be9b65ac DL |
327 | (interactive) |
328 | (comint-mode) | |
a9ec2adb | 329 | (setq major-mode 'shell-mode) |
bd5201e3 | 330 | (setq mode-name "Shell") |
be9b65ac | 331 | (use-local-map shell-mode-map) |
d76b71af | 332 | (setq comint-prompt-regexp shell-prompt-pattern) |
e11284d5 | 333 | (setq comint-completion-fignore shell-completion-fignore) |
d76b71af | 334 | (setq comint-delimiter-argument-list shell-delimiter-argument-list) |
76f63ea0 | 335 | (setq comint-file-name-chars shell-file-name-chars) |
7b4c6503 | 336 | (setq comint-file-name-quote-list shell-file-name-quote-list) |
988a4d60 | 337 | (setq comint-dynamic-complete-functions shell-dynamic-complete-functions) |
d76b71af RS |
338 | (make-local-variable 'paragraph-start) |
339 | (setq paragraph-start comint-prompt-regexp) | |
c156572f SM |
340 | (make-local-variable 'font-lock-defaults) |
341 | (setq font-lock-defaults '(shell-font-lock-keywords t)) | |
be9b65ac | 342 | (make-local-variable 'shell-dirstack) |
a9ec2adb | 343 | (setq shell-dirstack nil) |
fa8f1b25 | 344 | (setq shell-last-dir nil) |
a9ec2adb JB |
345 | (make-local-variable 'shell-dirtrackp) |
346 | (setq shell-dirtrackp t) | |
1458efa0 | 347 | (add-hook 'comint-input-filter-functions 'shell-directory-tracker nil t) |
4f99443b | 348 | (setq comint-input-autoexpand shell-input-autoexpand) |
0b3c9cf1 SM |
349 | (make-local-variable 'list-buffers-directory) |
350 | (setq list-buffers-directory (expand-file-name default-directory)) | |
d76b71af | 351 | ;; shell-dependent assignments. |
c63e83a4 RS |
352 | (let ((shell (file-name-nondirectory (car |
353 | (process-command (get-buffer-process (current-buffer))))))) | |
d76b71af RS |
354 | (setq comint-input-ring-file-name |
355 | (or (getenv "HISTFILE") | |
c63e83a4 RS |
356 | (cond ((string-equal shell "bash") "~/.bash_history") |
357 | ((string-equal shell "ksh") "~/.sh_history") | |
358 | (t "~/.history")))) | |
525c5be7 | 359 | (if (or (equal comint-input-ring-file-name "") |
fbcb3055 RS |
360 | (equal (file-truename comint-input-ring-file-name) |
361 | (file-truename "/dev/null"))) | |
3c24374d | 362 | (setq comint-input-ring-file-name nil)) |
c63e83a4 | 363 | (setq shell-dirstack-query |
221ca406 SM |
364 | (cond ((string-equal shell "sh") "pwd") |
365 | ((string-equal shell "ksh") "echo $PWD ~-") | |
366 | (t "dirs")))) | |
d76b71af | 367 | (run-hooks 'shell-mode-hook) |
4f99443b | 368 | (comint-read-input-ring t)) |
be9b65ac | 369 | \f |
c88ab9ce | 370 | ;;;###autoload |
be9b65ac DL |
371 | (defun shell () |
372 | "Run an inferior shell, with I/O through buffer *shell*. | |
373 | If buffer exists but shell process is not running, make new shell. | |
d76b71af | 374 | If buffer exists and shell process is running, just switch to buffer `*shell*'. |
24fdffaa | 375 | Program used comes from variable `explicit-shell-file-name', |
a9ec2adb JB |
376 | or (if that is nil) from the ESHELL environment variable, |
377 | or else from SHELL if there is no ESHELL. | |
fbc270e7 | 378 | If a file `~/.emacs_SHELLNAME' exists, it is given as initial input |
a9ec2adb JB |
379 | (Note that this may lose due to a timing error if the shell |
380 | discards input when it starts up.) | |
fbc270e7 RS |
381 | The buffer is put in Shell mode, giving commands for sending input |
382 | and controlling the subjobs of the shell. See `shell-mode'. | |
383 | See also the variable `shell-prompt-pattern'. | |
be9b65ac | 384 | |
a9ec2adb | 385 | The shell file name (sans directories) is used to make a symbol name |
62c9fad7 | 386 | such as `explicit-csh-args'. If that symbol is a variable, |
be9b65ac DL |
387 | its value is used as a list of arguments when invoking the shell. |
388 | Otherwise, one argument `-i' is passed to the shell. | |
389 | ||
390 | \(Type \\[describe-mode] in the shell buffer for a list of commands.)" | |
391 | (interactive) | |
d76b71af RS |
392 | (if (not (comint-check-proc "*shell*")) |
393 | (let* ((prog (or explicit-shell-file-name | |
394 | (getenv "ESHELL") | |
395 | (getenv "SHELL") | |
396 | "/bin/sh")) | |
397 | (name (file-name-nondirectory prog)) | |
398 | (startfile (concat "~/.emacs_" name)) | |
519bfec4 RS |
399 | (xargs-name (intern-soft (concat "explicit-" name "-args"))) |
400 | shell-buffer) | |
401 | (save-excursion | |
402 | (set-buffer (apply 'make-comint "shell" prog | |
403 | (if (file-exists-p startfile) startfile) | |
404 | (if (and xargs-name (boundp xargs-name)) | |
405 | (symbol-value xargs-name) | |
406 | '("-i")))) | |
407 | (setq shell-buffer (current-buffer)) | |
408 | (shell-mode)) | |
409 | (pop-to-buffer shell-buffer)) | |
410 | (pop-to-buffer "*shell*"))) | |
411 | ||
412 | ;;; Don't do this when shell.el is loaded, only while dumping. | |
413 | ;;;###autoload (add-hook 'same-window-buffer-names "*shell*") | |
be9b65ac DL |
414 | \f |
415 | ;;; Directory tracking | |
b578f267 | 416 | ;;; |
be9b65ac DL |
417 | ;;; This code provides the shell mode input sentinel |
418 | ;;; SHELL-DIRECTORY-TRACKER | |
419 | ;;; that tracks cd, pushd, and popd commands issued to the shell, and | |
420 | ;;; changes the current directory of the shell buffer accordingly. | |
421 | ;;; | |
422 | ;;; This is basically a fragile hack, although it's more accurate than | |
b7fc702e | 423 | ;;; the version in Emacs 18's shell.el. It has the following failings: |
be9b65ac | 424 | ;;; 1. It doesn't know about the cdpath shell variable. |
d76b71af RS |
425 | ;;; 2. It cannot infallibly deal with command sequences, though it does well |
426 | ;;; with these and with ignoring commands forked in another shell with ()s. | |
427 | ;;; 3. More generally, any complex command is going to throw it. Otherwise, | |
428 | ;;; you'd have to build an entire shell interpreter in emacs lisp. Failing | |
429 | ;;; that, there's no way to catch shell commands where cd's are buried | |
430 | ;;; inside conditional expressions, aliases, and so forth. | |
be9b65ac DL |
431 | ;;; |
432 | ;;; The whole approach is a crock. Shell aliases mess it up. File sourcing | |
433 | ;;; messes it up. You run other processes under the shell; these each have | |
434 | ;;; separate working directories, and some have commands for manipulating | |
435 | ;;; their w.d.'s (e.g., the lcd command in ftp). Some of these programs have | |
a9ec2adb | 436 | ;;; commands that do *not* affect the current w.d. at all, but look like they |
be9b65ac DL |
437 | ;;; do (e.g., the cd command in ftp). In shells that allow you job |
438 | ;;; control, you can switch between jobs, all having different w.d.'s. So | |
439 | ;;; simply saying %3 can shift your w.d.. | |
440 | ;;; | |
441 | ;;; The solution is to relax, not stress out about it, and settle for | |
442 | ;;; a hack that works pretty well in typical circumstances. Remember | |
443 | ;;; that a half-assed solution is more in keeping with the spirit of Unix, | |
444 | ;;; anyway. Blech. | |
445 | ;;; | |
446 | ;;; One good hack not implemented here for users of programmable shells | |
447 | ;;; is to program up the shell w.d. manipulation commands to output | |
448 | ;;; a coded command sequence to the tty. Something like | |
449 | ;;; ESC | <cwd> | | |
450 | ;;; where <cwd> is the new current working directory. Then trash the | |
451 | ;;; directory tracking machinery currently used in this package, and | |
452 | ;;; replace it with a process filter that watches for and strips out | |
453 | ;;; these messages. | |
454 | ||
be9b65ac DL |
455 | (defun shell-directory-tracker (str) |
456 | "Tracks cd, pushd and popd commands issued to the shell. | |
457 | This function is called on each input passed to the shell. | |
458 | It watches for cd, pushd and popd commands and sets the buffer's | |
459 | default directory to track these commands. | |
460 | ||
461 | You may toggle this tracking on and off with M-x dirtrack-toggle. | |
462 | If emacs gets confused, you can resync with the shell with M-x dirs. | |
463 | ||
32d01212 RS |
464 | See variables `shell-cd-regexp', `shell-chdrive-regexp', `shell-pushd-regexp', |
465 | and `shell-popd-regexp', while `shell-pushd-tohome', `shell-pushd-dextract', | |
466 | and `shell-pushd-dunique' control the behavior of the relevant command. | |
d76b71af | 467 | |
24fdffaa | 468 | Environment variables are expanded, see function `substitute-in-file-name'." |
d76b71af RS |
469 | (if shell-dirtrackp |
470 | ;; We fail gracefully if we think the command will fail in the shell. | |
471 | (condition-case chdir-failure | |
54021695 | 472 | (let ((start (progn (string-match "^[; \t]*" str) ; skip whitespace |
d76b71af RS |
473 | (match-end 0))) |
474 | end cmd arg1) | |
475 | (while (string-match shell-command-regexp str start) | |
476 | (setq end (match-end 0) | |
477 | cmd (comint-arguments (substring str start end) 0 0) | |
478 | arg1 (comint-arguments (substring str start end) 1 1)) | |
54021695 KH |
479 | (cond ((string-match (concat "\\`\\(" shell-popd-regexp |
480 | "\\)\\($\\|[ \t]\\)") | |
481 | cmd) | |
32d01212 | 482 | (shell-process-popd (comint-substitute-in-file-name arg1))) |
54021695 KH |
483 | ((string-match (concat "\\`\\(" shell-pushd-regexp |
484 | "\\)\\($\\|[ \t]\\)") | |
485 | cmd) | |
32d01212 | 486 | (shell-process-pushd (comint-substitute-in-file-name arg1))) |
54021695 KH |
487 | ((string-match (concat "\\`\\(" shell-cd-regexp |
488 | "\\)\\($\\|[ \t]\\)") | |
489 | cmd) | |
32d01212 RS |
490 | (shell-process-cd (comint-substitute-in-file-name arg1))) |
491 | ((and shell-chdrive-regexp | |
492 | (string-match (concat "\\`\\(" shell-chdrive-regexp | |
493 | "\\)\\($\\|[ \t]\\)") | |
494 | cmd)) | |
495 | (shell-process-cd (comint-substitute-in-file-name cmd)))) | |
54021695 | 496 | (setq start (progn (string-match "[; \t]*" str end) ; skip again |
d76b71af | 497 | (match-end 0))))) |
ba02c167 | 498 | (error "Couldn't cd")))) |
d76b71af | 499 | |
be9b65ac DL |
500 | ;;; popd [+n] |
501 | (defun shell-process-popd (arg) | |
d76b71af RS |
502 | (let ((num (or (shell-extract-num arg) 0))) |
503 | (cond ((and num (= num 0) shell-dirstack) | |
0b3c9cf1 | 504 | (shell-cd (car shell-dirstack)) |
d76b71af RS |
505 | (setq shell-dirstack (cdr shell-dirstack)) |
506 | (shell-dirstack-message)) | |
507 | ((and num (> num 0) (<= num (length shell-dirstack))) | |
508 | (let* ((ds (cons nil shell-dirstack)) | |
509 | (cell (nthcdr (1- num) ds))) | |
510 | (rplacd cell (cdr (cdr cell))) | |
511 | (setq shell-dirstack (cdr ds)) | |
512 | (shell-dirstack-message))) | |
513 | (t | |
ba02c167 | 514 | (error "Couldn't popd"))))) |
be9b65ac | 515 | |
3db9a4eb | 516 | ;; Return DIR prefixed with comint-file-name-prefix as appropriate. |
4a02b552 RS |
517 | (defun shell-prefixed-directory-name (dir) |
518 | (if (= (length comint-file-name-prefix) 0) | |
519 | dir | |
520 | (if (file-name-absolute-p dir) | |
521 | ;; The name is absolute, so prepend the prefix. | |
522 | (concat comint-file-name-prefix dir) | |
0b3c9cf1 | 523 | ;; For relative name we assume default-directory already has the prefix. |
4a02b552 | 524 | (expand-file-name dir)))) |
3db9a4eb | 525 | |
be9b65ac DL |
526 | ;;; cd [dir] |
527 | (defun shell-process-cd (arg) | |
3db9a4eb RM |
528 | (let ((new-dir (cond ((zerop (length arg)) (concat comint-file-name-prefix |
529 | "~")) | |
d76b71af | 530 | ((string-equal "-" arg) shell-last-dir) |
3db9a4eb | 531 | (t (shell-prefixed-directory-name arg))))) |
d76b71af | 532 | (setq shell-last-dir default-directory) |
0b3c9cf1 | 533 | (shell-cd new-dir) |
d76b71af | 534 | (shell-dirstack-message))) |
be9b65ac DL |
535 | |
536 | ;;; pushd [+n | dir] | |
537 | (defun shell-process-pushd (arg) | |
d76b71af RS |
538 | (let ((num (shell-extract-num arg))) |
539 | (cond ((zerop (length arg)) | |
540 | ;; no arg -- swap pwd and car of stack unless shell-pushd-tohome | |
541 | (cond (shell-pushd-tohome | |
3db9a4eb | 542 | (shell-process-pushd (concat comint-file-name-prefix "~"))) |
d76b71af RS |
543 | (shell-dirstack |
544 | (let ((old default-directory)) | |
0b3c9cf1 | 545 | (shell-cd (car shell-dirstack)) |
221ca406 | 546 | (setq shell-dirstack (cons old (cdr shell-dirstack))) |
d76b71af RS |
547 | (shell-dirstack-message))) |
548 | (t | |
549 | (message "Directory stack empty.")))) | |
550 | ((numberp num) | |
551 | ;; pushd +n | |
552 | (cond ((> num (length shell-dirstack)) | |
553 | (message "Directory stack not that deep.")) | |
554 | ((= num 0) | |
555 | (error (message "Couldn't cd."))) | |
556 | (shell-pushd-dextract | |
557 | (let ((dir (nth (1- num) shell-dirstack))) | |
558 | (shell-process-popd arg) | |
559 | (shell-process-pushd default-directory) | |
0b3c9cf1 | 560 | (shell-cd dir) |
d76b71af RS |
561 | (shell-dirstack-message))) |
562 | (t | |
563 | (let* ((ds (cons default-directory shell-dirstack)) | |
564 | (dslen (length ds)) | |
565 | (front (nthcdr num ds)) | |
566 | (back (reverse (nthcdr (- dslen num) (reverse ds)))) | |
567 | (new-ds (append front back))) | |
0b3c9cf1 | 568 | (shell-cd (car new-ds)) |
d76b71af RS |
569 | (setq shell-dirstack (cdr new-ds)) |
570 | (shell-dirstack-message))))) | |
571 | (t | |
572 | ;; pushd <dir> | |
573 | (let ((old-wd default-directory)) | |
0b3c9cf1 | 574 | (shell-cd (shell-prefixed-directory-name arg)) |
d76b71af RS |
575 | (if (or (null shell-pushd-dunique) |
576 | (not (member old-wd shell-dirstack))) | |
577 | (setq shell-dirstack (cons old-wd shell-dirstack))) | |
578 | (shell-dirstack-message)))))) | |
be9b65ac DL |
579 | |
580 | ;; If STR is of the form +n, for n>0, return n. Otherwise, nil. | |
581 | (defun shell-extract-num (str) | |
582 | (and (string-match "^\\+[1-9][0-9]*$" str) | |
583 | (string-to-int str))) | |
584 | ||
585 | ||
586 | (defun shell-dirtrack-toggle () | |
587 | "Turn directory tracking on and off in a shell buffer." | |
588 | (interactive) | |
0b3c9cf1 SM |
589 | (if (setq shell-dirtrackp (not shell-dirtrackp)) |
590 | (setq list-buffers-directory default-directory) | |
591 | (setq list-buffers-directory nil)) | |
d76b71af | 592 | (message "Directory tracking %s" (if shell-dirtrackp "ON" "OFF"))) |
be9b65ac DL |
593 | |
594 | ;;; For your typing convenience: | |
31e1d920 | 595 | (defalias 'dirtrack-toggle 'shell-dirtrack-toggle) |
be9b65ac | 596 | |
0b3c9cf1 SM |
597 | (defun shell-cd (dir) |
598 | "Do normal `cd' to DIR, and set `list-buffers-directory'." | |
b7e97ed5 SM |
599 | (if shell-dirtrackp |
600 | (setq list-buffers-directory (file-name-as-directory | |
601 | (expand-file-name dir)))) | |
0b3c9cf1 | 602 | (cd dir)) |
be9b65ac DL |
603 | |
604 | (defun shell-resync-dirs () | |
605 | "Resync the buffer's idea of the current directory stack. | |
606 | This command queries the shell with the command bound to | |
24fdffaa | 607 | `shell-dirstack-query' (default \"dirs\"), reads the next |
be9b65ac DL |
608 | line output and parses it to form the new directory stack. |
609 | DON'T issue this command unless the buffer is at a shell prompt. | |
610 | Also, note that if some other subprocess decides to do output | |
611 | immediately after the query, its output will be taken as the | |
612 | new directory stack -- you lose. If this happens, just do the | |
613 | command again." | |
614 | (interactive) | |
615 | (let* ((proc (get-buffer-process (current-buffer))) | |
616 | (pmark (process-mark proc))) | |
617 | (goto-char pmark) | |
618 | (insert shell-dirstack-query) (insert "\n") | |
619 | (sit-for 0) ; force redisplay | |
620 | (comint-send-string proc shell-dirstack-query) | |
621 | (comint-send-string proc "\n") | |
622 | (set-marker pmark (point)) | |
623 | (let ((pt (point))) ; wait for 1 line | |
624 | ;; This extra newline prevents the user's pending input from spoofing us. | |
625 | (insert "\n") (backward-char 1) | |
626 | (while (not (looking-at ".+\n")) | |
627 | (accept-process-output proc) | |
628 | (goto-char pt))) | |
629 | (goto-char pmark) (delete-char 1) ; remove the extra newline | |
630 | ;; That's the dirlist. grab it & parse it. | |
d76b71af | 631 | (let* ((dl (buffer-substring (match-beginning 0) (1- (match-end 0)))) |
be9b65ac DL |
632 | (dl-len (length dl)) |
633 | (ds '()) ; new dir stack | |
634 | (i 0)) | |
635 | (while (< i dl-len) | |
636 | ;; regexp = optional whitespace, (non-whitespace), optional whitespace | |
637 | (string-match "\\s *\\(\\S +\\)\\s *" dl i) ; pick off next dir | |
3db9a4eb RM |
638 | (setq ds (cons (concat comint-file-name-prefix |
639 | (substring dl (match-beginning 1) | |
640 | (match-end 1))) | |
be9b65ac DL |
641 | ds)) |
642 | (setq i (match-end 0))) | |
3db9a4eb | 643 | (let ((ds (nreverse ds))) |
be9b65ac | 644 | (condition-case nil |
0b3c9cf1 | 645 | (progn (shell-cd (car ds)) |
221ca406 SM |
646 | (setq shell-dirstack (cdr ds) |
647 | shell-last-dir (car shell-dirstack)) | |
be9b65ac DL |
648 | (shell-dirstack-message)) |
649 | (error (message "Couldn't cd."))))))) | |
650 | ||
651 | ;;; For your typing convenience: | |
31e1d920 | 652 | (defalias 'dirs 'shell-resync-dirs) |
be9b65ac DL |
653 | |
654 | ||
655 | ;;; Show the current dirstack on the message line. | |
656 | ;;; Pretty up dirs a bit by changing "/usr/jqr/foo" to "~/foo". | |
657 | ;;; (This isn't necessary if the dirlisting is generated with a simple "dirs".) | |
658 | ;;; All the commands that mung the buffer's dirstack finish by calling | |
659 | ;;; this guy. | |
660 | (defun shell-dirstack-message () | |
94f9dcbe RM |
661 | (let* ((msg "") |
662 | (ds (cons default-directory shell-dirstack)) | |
d76b71af | 663 | (home (expand-file-name (concat comint-file-name-prefix "~/"))) |
94f9dcbe | 664 | (homelen (length home))) |
be9b65ac DL |
665 | (while ds |
666 | (let ((dir (car ds))) | |
94f9dcbe RM |
667 | (and (>= (length dir) homelen) (string= home (substring dir 0 homelen)) |
668 | (setq dir (concat "~/" (substring dir homelen)))) | |
d76b71af RS |
669 | ;; Strip off comint-file-name-prefix if present. |
670 | (and comint-file-name-prefix | |
671 | (>= (length dir) (length comint-file-name-prefix)) | |
672 | (string= comint-file-name-prefix | |
673 | (substring dir 0 (length comint-file-name-prefix))) | |
674 | (setq dir (substring dir (length comint-file-name-prefix))) | |
94f9dcbe | 675 | (setcar ds dir)) |
d76b71af | 676 | (setq msg (concat msg (directory-file-name dir) " ")) |
be9b65ac | 677 | (setq ds (cdr ds)))) |
6048fac7 | 678 | (message "%s" msg))) |
a9ec2adb | 679 | \f |
d76b71af RS |
680 | (defun shell-forward-command (&optional arg) |
681 | "Move forward across ARG shell command(s). Does not cross lines. | |
682 | See `shell-command-regexp'." | |
683 | (interactive "p") | |
684 | (let ((limit (save-excursion (end-of-line nil) (point)))) | |
19134c18 | 685 | (if (re-search-forward (concat shell-command-regexp "\\([;&|][\t ]*\\)+") |
d76b71af | 686 | limit 'move arg) |
b0f86743 | 687 | (skip-syntax-backward " ")))) |
d76b71af RS |
688 | |
689 | ||
690 | (defun shell-backward-command (&optional arg) | |
691 | "Move backward across ARG shell command(s). Does not cross lines. | |
692 | See `shell-command-regexp'." | |
693 | (interactive "p") | |
694 | (let ((limit (save-excursion (comint-bol nil) (point)))) | |
b0f86743 RS |
695 | (if (> limit (point)) |
696 | (save-excursion (beginning-of-line) (setq limit (point)))) | |
697 | (skip-syntax-backward " " limit) | |
d76b71af | 698 | (if (re-search-backward |
19134c18 | 699 | (format "[;&|]+[\t ]*\\(%s\\)" shell-command-regexp) limit 'move arg) |
d76b71af | 700 | (progn (goto-char (match-beginning 1)) |
b0f86743 | 701 | (skip-chars-forward ";&|"))))) |
d76b71af RS |
702 | |
703 | ||
d76b71af RS |
704 | (defun shell-dynamic-complete-command () |
705 | "Dynamically complete the command at point. | |
706 | This function is similar to `comint-dynamic-complete-filename', except that it | |
707 | searches `exec-path' (minus the trailing emacs library path) for completion | |
708 | candidates. Note that this may not be the same as the shell's idea of the | |
709 | path. | |
710 | ||
711 | Completion is dependent on the value of `shell-completion-execonly', plus | |
988a4d60 RS |
712 | those that effect file completion. See `shell-dynamic-complete-as-command'. |
713 | ||
714 | Returns t if successful." | |
d76b71af | 715 | (interactive) |
988a4d60 RS |
716 | (let ((filename (comint-match-partial-filename))) |
717 | (if (and filename | |
718 | (save-match-data (not (string-match "[~/]" filename))) | |
719 | (eq (match-beginning 0) | |
720 | (save-excursion (shell-backward-command 1) (point)))) | |
721 | (prog2 (message "Completing command name...") | |
722 | (shell-dynamic-complete-as-command))))) | |
723 | ||
724 | ||
725 | (defun shell-dynamic-complete-as-command () | |
726 | "Dynamically complete at point as a command. | |
727 | See `shell-dynamic-complete-filename'. Returns t if successful." | |
56783585 | 728 | (let* ((filename (or (comint-match-partial-filename) "")) |
d76b71af RS |
729 | (pathnondir (file-name-nondirectory filename)) |
730 | (paths (cdr (reverse exec-path))) | |
731 | (cwd (file-name-as-directory (expand-file-name default-directory))) | |
732 | (ignored-extensions | |
a867a90a RS |
733 | (and comint-completion-fignore |
734 | (mapconcat (function (lambda (x) (concat (regexp-quote x) "$"))) | |
735 | comint-completion-fignore "\\|"))) | |
d76b71af RS |
736 | (path "") (comps-in-path ()) (file "") (filepath "") (completions ())) |
737 | ;; Go thru each path in the search path, finding completions. | |
738 | (while paths | |
739 | (setq path (file-name-as-directory (comint-directory (or (car paths) "."))) | |
740 | comps-in-path (and (file-accessible-directory-p path) | |
741 | (file-name-all-completions pathnondir path))) | |
742 | ;; Go thru each completion found, to see whether it should be used. | |
743 | (while comps-in-path | |
744 | (setq file (car comps-in-path) | |
745 | filepath (concat path file)) | |
746 | (if (and (not (member file completions)) | |
7b2db0a0 KH |
747 | (not (and ignored-extensions |
748 | (string-match ignored-extensions file))) | |
d76b71af RS |
749 | (or (string-equal path cwd) |
750 | (not (file-directory-p filepath))) | |
751 | (or (null shell-completion-execonly) | |
752 | (file-executable-p filepath))) | |
753 | (setq completions (cons file completions))) | |
754 | (setq comps-in-path (cdr comps-in-path))) | |
755 | (setq paths (cdr paths))) | |
756 | ;; OK, we've got a list of completions. | |
56783585 RS |
757 | (let ((success (let ((comint-completion-addsuffix nil)) |
758 | (comint-dynamic-simple-complete pathnondir completions)))) | |
759 | (if (and (memq success '(sole shortest)) comint-completion-addsuffix | |
760 | (not (file-directory-p (comint-match-partial-filename)))) | |
761 | (insert " ")) | |
762 | success))) | |
988a4d60 RS |
763 | |
764 | ||
765 | (defun shell-match-partial-variable () | |
da6a48c9 | 766 | "Return the shell variable at point, or nil if none is found." |
988a4d60 RS |
767 | (save-excursion |
768 | (let ((limit (point))) | |
769 | (if (re-search-backward "[^A-Za-z0-9_{}]" nil 'move) | |
770 | (or (looking-at "\\$") (forward-char 1))) | |
771 | ;; Anchor the search forwards. | |
772 | (if (or (eolp) (looking-at "[^A-Za-z0-9_{}$]")) | |
773 | nil | |
774 | (re-search-forward "\\$?{?[A-Za-z0-9_]*}?" limit) | |
775 | (buffer-substring (match-beginning 0) (match-end 0)))))) | |
a9ec2adb | 776 | |
988a4d60 RS |
777 | |
778 | (defun shell-dynamic-complete-environment-variable () | |
779 | "Dynamically complete the environment variable at point. | |
780 | Completes if after a variable, i.e., if it starts with a \"$\". | |
781 | See `shell-dynamic-complete-as-environment-variable'. | |
782 | ||
783 | This function is similar to `comint-dynamic-complete-filename', except that it | |
784 | searches `process-environment' for completion candidates. Note that this may | |
785 | not be the same as the interpreter's idea of variable names. The main problem | |
786 | with this type of completion is that `process-environment' is the environment | |
787 | which Emacs started with. Emacs does not track changes to the environment made | |
788 | by the interpreter. Perhaps it would be more accurate if this function was | |
789 | called `shell-dynamic-complete-process-environment-variable'. | |
790 | ||
791 | Returns non-nil if successful." | |
792 | (interactive) | |
793 | (let ((variable (shell-match-partial-variable))) | |
794 | (if (and variable (string-match "^\\$" variable)) | |
795 | (prog2 (message "Completing variable name...") | |
796 | (shell-dynamic-complete-as-environment-variable))))) | |
797 | ||
798 | ||
799 | (defun shell-dynamic-complete-as-environment-variable () | |
800 | "Dynamically complete at point as an environment variable. | |
801 | Used by `shell-dynamic-complete-environment-variable'. | |
802 | Uses `comint-dynamic-simple-complete'." | |
803 | (let* ((var (or (shell-match-partial-variable) "")) | |
804 | (variable (substring var (or (string-match "[^$({]\\|$" var) 0))) | |
805 | (variables (mapcar (function (lambda (x) | |
806 | (substring x 0 (string-match "=" x)))) | |
807 | process-environment)) | |
808 | (addsuffix comint-completion-addsuffix) | |
809 | (comint-completion-addsuffix nil) | |
810 | (success (comint-dynamic-simple-complete variable variables))) | |
811 | (if (memq success '(sole shortest)) | |
812 | (let* ((var (shell-match-partial-variable)) | |
813 | (variable (substring var (string-match "[^$({]" var))) | |
814 | (protection (cond ((string-match "{" var) "}") | |
815 | ((string-match "(" var) ")") | |
816 | (t ""))) | |
817 | (suffix (cond ((null addsuffix) "") | |
818 | ((file-directory-p | |
819 | (comint-directory (getenv variable))) "/") | |
820 | (t " ")))) | |
821 | (insert protection suffix))) | |
822 | success)) | |
823 | ||
824 | ||
825 | (defun shell-replace-by-expanded-directory () | |
826 | "Expand directory stack reference before point. | |
827 | Directory stack references are of the form \"=digit\" or \"=-\". | |
828 | See `default-directory' and `shell-dirstack'. | |
829 | ||
830 | Returns t if successful." | |
831 | (interactive) | |
832 | (if (comint-match-partial-filename) | |
833 | (save-excursion | |
988a4d60 RS |
834 | (goto-char (match-beginning 0)) |
835 | (let ((stack (cons default-directory shell-dirstack)) | |
836 | (index (cond ((looking-at "=-/?") | |
837 | (length shell-dirstack)) | |
838 | ((looking-at "=\\([0-9]+\\)") | |
839 | (string-to-number | |
840 | (buffer-substring | |
841 | (match-beginning 1) (match-end 1))))))) | |
842 | (cond ((null index) | |
843 | nil) | |
844 | ((>= index (length stack)) | |
845 | (error "Directory stack not that deep.")) | |
846 | (t | |
847 | (replace-match (file-name-as-directory (nth index stack)) t t) | |
848 | (message "Directory item: %d" index) | |
849 | t)))))) | |
850 | \f | |
c88ab9ce ER |
851 | (provide 'shell) |
852 | ||
853 | ;;; shell.el ends here |