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Annotation of 43BSDReno/contrib/emacs-18.55/lisp/shell.el, revision 1.1

1.1     ! root        1: ;; Run subshell under Emacs
        !             2: ;; Copyright (C) 1985, 1986, 1987, 1988 Free Software Foundation, Inc.
        !             3: 
        !             4: ;; This file is part of GNU Emacs.
        !             5: 
        !             6: ;; GNU Emacs is distributed in the hope that it will be useful,
        !             7: ;; but WITHOUT ANY WARRANTY.  No author or distributor
        !             8: ;; accepts responsibility to anyone for the consequences of using it
        !             9: ;; or for whether it serves any particular purpose or works at all,
        !            10: ;; unless he says so in writing.  Refer to the GNU Emacs General Public
        !            11: ;; License for full details.
        !            12: 
        !            13: ;; Everyone is granted permission to copy, modify and redistribute
        !            14: ;; GNU Emacs, but only under the conditions described in the
        !            15: ;; GNU Emacs General Public License.   A copy of this license is
        !            16: ;; supposed to have been given to you along with GNU Emacs so you
        !            17: ;; can know your rights and responsibilities.  It should be in a
        !            18: ;; file named COPYING.  Among other things, the copyright notice
        !            19: ;; and this notice must be preserved on all copies.
        !            20: 
        !            21: 
        !            22: (provide 'shell)
        !            23: 
        !            24: (defvar last-input-start nil
        !            25:   "In a shell-mode buffer, marker for start of last unit of input.")
        !            26: (defvar last-input-end nil
        !            27:   "In a shell-mode buffer, marker for end of last unit of input.")
        !            28: 
        !            29: (defvar shell-mode-map nil)
        !            30: 
        !            31: (defvar shell-directory-stack nil
        !            32:   "List of directories saved by pushd in this buffer's shell.")
        !            33: 
        !            34: (defvar shell-popd-regexp "popd"
        !            35:   "*Regexp to match subshell commands equivalent to popd.")
        !            36: 
        !            37: (defvar shell-pushd-regexp "pushd"
        !            38:   "*Regexp to match subshell commands equivalent to pushd.")
        !            39: 
        !            40: (defvar shell-cd-regexp "cd"
        !            41:   "*Regexp to match subshell commands equivalent to cd.")
        !            42: 
        !            43: (defvar explicit-shell-file-name nil
        !            44:   "*If non-nil, is file name to use for explicitly requested inferior shell.")
        !            45: 
        !            46: ;In loaddefs.el now.
        !            47: ;(defconst shell-prompt-pattern
        !            48: ;  "^[^#$%>]*[#$%>] *"
        !            49: ;  "*Regexp used by Newline command to match subshell prompts.
        !            50: ;Anything from beginning of line up to the end of what this pattern matches
        !            51: ;is deemed to be prompt, and is not reexecuted.")
        !            52: 
        !            53: (defun shell-mode ()
        !            54:   "Major mode for interacting with an inferior shell.
        !            55: Shell name is same as buffer name, sans the asterisks.
        !            56: Return at end of buffer sends line as input.
        !            57: Return not at end copies rest of line to end and sends it.
        !            58: 
        !            59: The following commands imitate the usual Unix interrupt and
        !            60: editing control characters:
        !            61: \\{shell-mode-map}
        !            62: 
        !            63: Entry to this mode calls the value of shell-mode-hook with no args,
        !            64: if that value is non-nil.
        !            65: 
        !            66: cd, pushd and popd commands given to the shell are watched
        !            67: by Emacs to keep this buffer's default directory
        !            68: the same as the shell's working directory.
        !            69: Variables shell-cd-regexp, shell-pushd-regexp and shell-popd-regexp
        !            70: are used to match these command names.
        !            71: 
        !            72: You can send text to the shell (or its subjobs) from other buffers
        !            73: using the commands process-send-region, process-send-string
        !            74: and lisp-send-defun."
        !            75:   (interactive)
        !            76:   (kill-all-local-variables)
        !            77:   (setq major-mode 'shell-mode)
        !            78:   (setq mode-name "Shell")
        !            79:   (setq mode-line-process '(": %s"))
        !            80:   (use-local-map shell-mode-map)
        !            81:   (make-local-variable 'shell-directory-stack)
        !            82:   (setq shell-directory-stack nil)
        !            83:   (make-local-variable 'last-input-start)
        !            84:   (setq last-input-start (make-marker))
        !            85:   (make-local-variable 'last-input-end)
        !            86:   (setq last-input-end (make-marker))
        !            87:   (run-hooks 'shell-mode-hook))
        !            88: 
        !            89: (if shell-mode-map
        !            90:     nil
        !            91:   (setq shell-mode-map (make-sparse-keymap))
        !            92:   (define-key shell-mode-map "\C-m" 'shell-send-input)
        !            93:   (define-key shell-mode-map "\C-c\C-d" 'shell-send-eof)
        !            94:   (define-key shell-mode-map "\C-c\C-u" 'kill-shell-input)
        !            95:   (define-key shell-mode-map "\C-c\C-w" 'backward-kill-word)
        !            96:   (define-key shell-mode-map "\C-c\C-c" 'interrupt-shell-subjob)
        !            97:   (define-key shell-mode-map "\C-c\C-z" 'stop-shell-subjob)
        !            98:   (define-key shell-mode-map "\C-c\C-\\" 'quit-shell-subjob)
        !            99:   (define-key shell-mode-map "\C-c\C-o" 'kill-output-from-shell)
        !           100:   (define-key shell-mode-map "\C-c\C-r" 'show-output-from-shell)
        !           101:   (define-key shell-mode-map "\C-c\C-y" 'copy-last-shell-input))
        !           102: 
        !           103: (defvar explicit-csh-args
        !           104:   (if (eq system-type 'hpux)
        !           105:       ;; -T persuades HP's csh not to think it is smarter
        !           106:       ;; than us about what terminal modes to use.
        !           107:       '("-i" "-T")
        !           108:     '("-i"))
        !           109:   "Args passed to inferior shell by M-x shell, if the shell is csh.
        !           110: Value is a list of strings, which may be nil.")
        !           111: 
        !           112: (defun shell ()
        !           113:   "Run an inferior shell, with I/O through buffer *shell*.
        !           114: If buffer exists but shell process is not running, make new shell.
        !           115: Program used comes from variable explicit-shell-file-name,
        !           116:  or (if that is nil) from the ESHELL environment variable,
        !           117:  or else from SHELL if there is no ESHELL.
        !           118: If a file ~/.emacs_SHELLNAME exists, it is given as initial input
        !           119:  (Note that this may lose due to a timing error if the shell
        !           120:   discards input when it starts up.)
        !           121: The buffer is put in shell-mode, giving commands for sending input
        !           122: and controlling the subjobs of the shell.  See shell-mode.
        !           123: See also variable shell-prompt-pattern.
        !           124: 
        !           125: The shell file name (sans directories) is used to make a symbol name
        !           126: such as `explicit-csh-arguments'.  If that symbol is a variable,
        !           127: its value is used as a list of arguments when invoking the shell.
        !           128: Otherwise, one argument `-i' is passed to the shell.
        !           129: 
        !           130: Note that many people's .cshrc files unconditionally clear the prompt.
        !           131: If yours does, you will probably want to change it."
        !           132:   (interactive)
        !           133:   (let* ((prog (or explicit-shell-file-name
        !           134:                   (getenv "ESHELL")
        !           135:                   (getenv "SHELL")
        !           136:                   "/bin/sh"))               
        !           137:         (name (file-name-nondirectory prog)))
        !           138:     (switch-to-buffer
        !           139:      (apply 'make-shell "shell" prog
        !           140:            (if (file-exists-p (concat "~/.emacs_" name))
        !           141:                (concat "~/.emacs_" name))
        !           142:            (let ((symbol (intern-soft (concat "explicit-" name "-args"))))
        !           143:              (if (and symbol (boundp symbol))
        !           144:                  (symbol-value symbol)
        !           145:                '("-i")))))))
        !           146: 
        !           147: (defun make-shell (name program &optional startfile &rest switches)
        !           148:   (let ((buffer (get-buffer-create (concat "*" name "*")))
        !           149:        proc status size)
        !           150:     (setq proc (get-buffer-process buffer))
        !           151:     (if proc (setq status (process-status proc)))
        !           152:     (save-excursion
        !           153:       (set-buffer buffer)
        !           154:       ;;    (setq size (buffer-size))
        !           155:       (if (memq status '(run stop))
        !           156:          nil
        !           157:        (if proc (delete-process proc))
        !           158:        (setq proc (apply 'start-process name buffer
        !           159:                          (concat exec-directory "env")
        !           160:                          (format "TERMCAP=emacs:co#%d:tc=unknown:"
        !           161:                                  (screen-width))
        !           162:                          "TERM=emacs"
        !           163:                          "EMACS=t"
        !           164:                          "-"
        !           165:                          (or program explicit-shell-file-name
        !           166:                              (getenv "ESHELL")
        !           167:                              (getenv "SHELL")
        !           168:                              "/bin/sh")
        !           169:                          switches))
        !           170:        (cond (startfile
        !           171:               ;;This is guaranteed to wait long enough
        !           172:               ;;but has bad results if the shell does not prompt at all
        !           173:               ;;            (while (= size (buffer-size))
        !           174:               ;;              (sleep-for 1))
        !           175:               ;;I hope 1 second is enough!
        !           176:               (sleep-for 1)
        !           177:               (goto-char (point-max))
        !           178:               (insert-file-contents startfile)
        !           179:               (setq startfile (buffer-substring (point) (point-max)))
        !           180:               (delete-region (point) (point-max))
        !           181:               (process-send-string proc startfile)))
        !           182:        (setq name (process-name proc)))
        !           183:       (goto-char (point-max))
        !           184:       (set-marker (process-mark proc) (point))
        !           185:       (shell-mode))
        !           186:     buffer))
        !           187: 
        !           188: (defvar shell-set-directory-error-hook 'ignore
        !           189:   "Function called with no arguments when shell-send-input
        !           190: recognizes a change-directory command but gets an error
        !           191: trying to change Emacs's default directory.")
        !           192: 
        !           193: (defun shell-send-input ()
        !           194:   "Send input to subshell.
        !           195: At end of buffer, sends all text after last output
        !           196:  as input to the subshell, including a newline inserted at the end.
        !           197: When not at end, copies current line to the end of the buffer and sends it,
        !           198: after first attempting to discard any prompt at the beginning of the line
        !           199: by matching the regexp that is the value of shell-prompt-pattern if possible.
        !           200: This regexp should start with \"^\"."
        !           201:   (interactive)
        !           202:   (or (get-buffer-process (current-buffer))
        !           203:       (error "Current buffer has no process"))
        !           204:   (end-of-line)
        !           205:   (if (eobp)
        !           206:       (progn
        !           207:        (move-marker last-input-start
        !           208:                     (process-mark (get-buffer-process (current-buffer))))
        !           209:        (insert ?\n)
        !           210:        (move-marker last-input-end (point)))
        !           211:     (beginning-of-line)
        !           212:     ;; Exclude the shell prompt, if any.
        !           213:     (re-search-forward shell-prompt-pattern
        !           214:                       (save-excursion (end-of-line) (point))
        !           215:                       t)
        !           216:     (let ((copy (buffer-substring (point)
        !           217:                                  (progn (forward-line 1) (point)))))
        !           218:       (goto-char (point-max))
        !           219:       (move-marker last-input-start (point))
        !           220:       (insert copy)
        !           221:       (move-marker last-input-end (point))))
        !           222:   ;; Even if we get an error trying to hack the working directory,
        !           223:   ;; still send the input to the subshell.
        !           224:   (condition-case ()
        !           225:       (save-excursion
        !           226:        (goto-char last-input-start)
        !           227:        (shell-set-directory))
        !           228:     (error (funcall shell-set-directory-error-hook)))
        !           229:   (let ((process (get-buffer-process (current-buffer))))
        !           230:     (process-send-region process last-input-start last-input-end)
        !           231:     (set-marker (process-mark process) (point))))
        !           232: 
        !           233: ;;;  If this code changes (shell-send-input and shell-set-directory),
        !           234: ;;;  the customization tutorial in
        !           235: ;;;  info/customizing-tutorial must also change, since it explains this
        !           236: ;;;  code.  Please let [email protected] know of any changes you
        !           237: ;;;  make. 
        !           238: 
        !           239: (defun shell-set-directory ()
        !           240:   (cond ((and (looking-at shell-popd-regexp)
        !           241:              (memq (char-after (match-end 0)) '(?\; ?\n)))
        !           242:         (if shell-directory-stack
        !           243:             (progn
        !           244:               (cd (car shell-directory-stack))
        !           245:               (setq shell-directory-stack (cdr shell-directory-stack)))))
        !           246:        ((looking-at shell-pushd-regexp)
        !           247:         (cond ((memq (char-after (match-end 0)) '(?\; ?\n))
        !           248:                (if shell-directory-stack
        !           249:                    (let ((old default-directory))
        !           250:                      (cd (car shell-directory-stack))
        !           251:                      (setq shell-directory-stack
        !           252:                            (cons old (cdr shell-directory-stack))))))
        !           253:               ((memq (char-after (match-end 0)) '(?\  ?\t))
        !           254:                (let (dir)
        !           255:                  (skip-chars-forward "^ ")
        !           256:                  (skip-chars-forward " \t")
        !           257:                  (if (file-directory-p
        !           258:                        (setq dir
        !           259:                              (expand-file-name
        !           260:                                (substitute-in-file-name
        !           261:                                  (buffer-substring
        !           262:                                    (point)
        !           263:                                    (progn
        !           264:                                      (skip-chars-forward "^\n \t;")
        !           265:                                      (point)))))))
        !           266:                      (progn
        !           267:                        (setq shell-directory-stack
        !           268:                              (cons default-directory shell-directory-stack))
        !           269:                        (cd dir)))))))
        !           270:        ((looking-at shell-cd-regexp)
        !           271:         (cond ((memq (char-after (match-end 0)) '(?\; ?\n))
        !           272:                (cd (getenv "HOME")))
        !           273:               ((memq (char-after (match-end 0)) '(?\  ?\t))
        !           274:                (let (dir)
        !           275:                  (forward-char 3)
        !           276:                  (skip-chars-forward " \t")
        !           277:                  (if (file-directory-p
        !           278:                        (setq dir
        !           279:                              (expand-file-name
        !           280:                                (substitute-in-file-name
        !           281:                                  (buffer-substring
        !           282:                                    (point)
        !           283:                                    (progn
        !           284:                                      (skip-chars-forward "^\n \t;")
        !           285:                                      (point)))))))
        !           286:                      (cd dir))))))))
        !           287:   
        !           288: (defun shell-send-eof ()
        !           289:   "Send eof to subshell (or to the program running under it)."
        !           290:   (interactive)
        !           291:   (process-send-eof))
        !           292: 
        !           293: (defun kill-output-from-shell ()
        !           294:   "Kill all output from shell since last input."
        !           295:   (interactive)
        !           296:   (goto-char (point-max))
        !           297:   (beginning-of-line)
        !           298:   (kill-region last-input-end (point))
        !           299:   (insert "*** output flushed ***\n")
        !           300:   (goto-char (point-max)))
        !           301: 
        !           302: (defun show-output-from-shell ()
        !           303:   "Display start of this batch of shell output at top of window.
        !           304: Also put cursor there."
        !           305:   (interactive)
        !           306:   (set-window-start (selected-window) last-input-end)
        !           307:   (goto-char last-input-end))
        !           308: 
        !           309: (defun copy-last-shell-input ()
        !           310:   "Copy previous shell input, sans newline, and insert before point."
        !           311:   (interactive)
        !           312:   (insert (buffer-substring last-input-end last-input-start))
        !           313:   (delete-char -1))
        !           314: 
        !           315: (defun interrupt-shell-subjob ()
        !           316:   "Interrupt this shell's current subjob."
        !           317:   (interactive)
        !           318:   (interrupt-process nil t))
        !           319: 
        !           320: (defun kill-shell-subjob ()
        !           321:   "Send kill signal to this shell's current subjob."
        !           322:   (interactive)
        !           323:   (kill-process nil t))
        !           324: 
        !           325: (defun quit-shell-subjob ()
        !           326:   "Send quit signal to this shell's current subjob."
        !           327:   (interactive)
        !           328:   (quit-process nil t))
        !           329: 
        !           330: (defun stop-shell-subjob ()
        !           331:   "Stop this shell's current subjob."
        !           332:   (interactive)
        !           333:   (stop-process nil t))
        !           334: 
        !           335: (defun kill-shell-input ()
        !           336:   "Kill all text since last stuff output by the shell or its subjobs."
        !           337:   (interactive)
        !           338:   (kill-region (process-mark (get-buffer-process (current-buffer)))
        !           339:               (point)))
        !           340: 
        !           341: (defvar inferior-lisp-mode-map nil)
        !           342: (if inferior-lisp-mode-map
        !           343:     nil
        !           344:   (setq inferior-lisp-mode-map (copy-alist shell-mode-map))
        !           345:   (lisp-mode-commands inferior-lisp-mode-map)
        !           346:   (define-key inferior-lisp-mode-map "\e\C-x" 'lisp-send-defun))
        !           347: 
        !           348: (defvar inferior-lisp-program "lisp"
        !           349:   "*Program name for invoking an inferior Lisp with `run-lisp'.")
        !           350: 
        !           351: (defvar inferior-lisp-load-command "(load \"%s\")\n"
        !           352:   "*Format-string for building a Lisp expression to load a file.
        !           353: This format string should use %s to substitute a file name
        !           354: and should result in a Lisp expression that will command the inferior Lisp
        !           355: to load that file.  The default works acceptably on most Lisps.
        !           356: The string \"(progn (load \\\"%s\\\" :verbose nil :print t) (values))\\\n\"
        !           357: produces cosmetically superior output for this application,
        !           358: but it works only in Common Lisp.")
        !           359: 
        !           360: (defvar inferior-lisp-prompt "^.*>:? *$"
        !           361:   "*Regexp to recognize prompts from the inferior Lisp.
        !           362: Default is right for Franz Lisp and kcl.")
        !           363: 
        !           364: (defun inferior-lisp-mode ()
        !           365:   "Major mode for interacting with an inferior Lisp process.
        !           366: Runs a Lisp interpreter as a subprocess of Emacs, with Lisp I/O
        !           367: through an Emacs buffer.  Variable inferior-lisp-program controls
        !           368: which Lisp interpreter is run.  Variables inferior-lisp-prompt
        !           369: and inferior-lisp-load-command can customize this mode for different
        !           370: Lisp interpreters.
        !           371: 
        !           372: Commands:
        !           373: DELETE converts tabs to spaces as it moves back.
        !           374: TAB indents for Lisp; with argument, shifts rest
        !           375:  of expression rigidly with the current line.
        !           376: Meta-Control-Q does TAB on each line starting within following expression.
        !           377: Paragraphs are separated only by blank lines.  Semicolons start comments.
        !           378: 
        !           379: Return at end of buffer sends line as input.
        !           380: Return not at end copies rest of line to end and sends it.
        !           381: 
        !           382: The following commands imitate the usual Unix interrupt and
        !           383: editing control characters:
        !           384: \\{shell-mode-map}
        !           385: 
        !           386: Entry to this mode calls the value of lisp-mode-hook with no arguments,
        !           387: if that value is non-nil.  Likewise with the value of shell-mode-hook.
        !           388: lisp-mode-hook is called after shell-mode-hook.
        !           389: 
        !           390: You can send text to the inferior Lisp from other buffers
        !           391: using the commands process-send-region, process-send-string
        !           392: and \\[lisp-send-defun]."
        !           393:   (interactive)
        !           394:   (kill-all-local-variables)
        !           395:   (setq major-mode 'inferior-lisp-mode)
        !           396:   (setq mode-name "Inferior Lisp")
        !           397:   (setq mode-line-process '(": %s"))
        !           398:   (lisp-mode-variables t)
        !           399:   (use-local-map inferior-lisp-mode-map)
        !           400:   (make-local-variable 'last-input-start)
        !           401:   (setq last-input-start (make-marker))
        !           402:   (make-local-variable 'last-input-end)
        !           403:   (setq last-input-end (make-marker))
        !           404:   (run-hooks 'shell-mode-hook 'lisp-mode-hook))
        !           405: 
        !           406: (defun run-lisp ()
        !           407:   "Run an inferior Lisp process, input and output via buffer *lisp*."
        !           408:   (interactive)
        !           409:   (switch-to-buffer (make-shell "lisp" inferior-lisp-program))
        !           410:   (inferior-lisp-mode))
        !           411: 
        !           412: (defun lisp-send-defun (display-flag)
        !           413:   "Send the current defun to the Lisp process made by M-x run-lisp.
        !           414: With argument, force redisplay and scrolling of the *lisp* buffer.
        !           415: Variable `inferior-lisp-load-command' controls formatting of
        !           416: the `load' form that is set to the Lisp process."
        !           417:   (interactive "P")
        !           418:   (or (get-process "lisp")
        !           419:       (error "No current lisp process"))
        !           420:   (save-excursion
        !           421:    (end-of-defun)
        !           422:    (let ((end (point))
        !           423:         (filename (format "/tmp/emlisp%d" (process-id (get-process "lisp")))))
        !           424:      (beginning-of-defun)
        !           425:      (write-region (point) end filename nil 'nomessage)
        !           426:      (process-send-string "lisp" (format inferior-lisp-load-command filename)))
        !           427:    (if display-flag
        !           428:        (let* ((process (get-process "lisp"))
        !           429:              (buffer (process-buffer process))
        !           430:              (w (or (get-buffer-window buffer) (display-buffer buffer)))
        !           431:              (height (window-height w))
        !           432:              (end))
        !           433:         (save-excursion
        !           434:           (set-buffer buffer)
        !           435:           (setq end (point-max))
        !           436:           (while (progn
        !           437:                    (accept-process-output process)
        !           438:                    (goto-char (point-max))
        !           439:                    (beginning-of-line)
        !           440:                    (or (= (point-max) end)
        !           441:                        (not (looking-at inferior-lisp-prompt)))))
        !           442:           (setq end (point-max))
        !           443:           (vertical-motion (- 4 height))
        !           444:           (set-window-start w (point)))
        !           445:         (set-window-point w end)))))
        !           446: 
        !           447: (defun lisp-send-defun-and-go ()
        !           448:   "Send the current defun to the inferior Lisp, and switch to *lisp* buffer."
        !           449:   (interactive)
        !           450:   (lisp-send-defun nil)
        !           451:   (switch-to-buffer "*lisp*"))

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