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From utkcs2!emory!swrinde!ucsd!tut.cis.ohio-state.edu!pt.cs.cmu.edu!a.gp.cs.cmu.edu!shivers Tue Jun 12 10:07:39 EDT 1990 Article 4422 of comp.emacs: Xref: utkcs2 comp.emacs:4422 gnu.emacs:2944 Path: utkcs2!emory!swrinde!ucsd!tut.cis.ohio-state.edu!pt.cs.cmu.edu!a.gp.cs.cmu.edu!shivers >From: shivers@a.gp.cs.cmu.edu (Olin Shivers) Newsgroups: comp.emacs,gnu.emacs Subject: Release two of CMU process modes (1 of 4) Keywords: comint Message-ID: <9599@pt.cs.cmu.edu> Date: 12 Jun 90 06:14:36 GMT Organization: Carnegie-Mellon University, CS/RI Lines: 1269 This message contains: 1. The standard anouncement header 2. A shar file for cmushell.el and tea.el (The entire package must be split -- otherwise notesfiles sites will not be able to handle it.) ------------------------------------------------------------------------------- I am posting release two of the CMU process modes. These are a suite of gnu-emacs packages for running various command interpreters in buffers. They are all built on top of a single base mode (comint mode) that provides a consistent set of base functionality and keybindings. These modes have the following advantages: - Input history is kept in all modes, traversed with M-p and M-n, just like on LispM's and various fancy shells. - Filename completion and query is available in all modes. - Keybindings are cross-compatible among all modes. - Keybindings are compatible with Zwei and Hemlock. - Directory tracking is more robust in shell mode, and is *only* active in shell mode. (Try entering "cd /" to an inferior lisp in the old package: Lisp barfs, but the inferior lisp mode goes ahead and changes the buffer's directory.) - Non-echoed text entry (for entering passwords) is available in all modes. - Shell and inferior Lisp modes are backwards compatible with the standard gnu modes. - A full set of eval/compile-region/defun commands for the inferior Lisp, Scheme, and T modes. - New modes are easily created for new types of processes. The comint source has a section giving hints on converting older shell.el-based modes to use comint. I am told that the FSF will be using comint in the next release of gnumacs. The current set of modes are: background.el - run process in background, a la csh. cmulisp.el - simple lisp-in-a-buffer mode. cmuscheme.el - Scheme-in-a-buffer. cmushell.el - shell-in-a-buffer. cmutex.el - for TeX and LaTeX editing. Process support for running tex and latex, and printing and previewing .dvi files. comint.el - base mode. Used by everyone else. tea.el - T-in-a-buffer These packages can be used singly or together. They are careful not to interfere with other modes. Where possible, I have tried to make them compatible with other similar modes, in terms of keybindings, functionality, and variable names. Users familiar with Hemlock or the LispM's Zemacs will find the commands in cmulisp are bound to similar keys. Cmushell mode pays attention to the variables that customise shell.el. And so forth. Also separately available are: ilisp.el - Powerful tightly-integrated lisp-in-a-buffer mode. comint-ipc.el - Facility for piggy-backing emacs/subprocess communications on top of the user's pipe or pty communications. Unavoidably somewhat fragile, but nontheless useful. Used by ilisp.el. These files should be released imminently by Chris McConnell. MAJOR CHANGES FROM RELEASE ONE =============================================================================== - An extremely hairy Lisp/Scheme interface by Chris Mconnell (ccm@cs.cmu.edu). This package, ilisp.el, allows emacs to query the running process for useful state. Example commands are: lisp-arglist display the arguments taken by the current function. lisp-describe call the Common Lisp DESCRIBE function on the symbol the cursor is over, and put the results in a window. lisp-macroexpand macroexpand the current form and display the results. lisp-find-source Edit the file that defines the function the point is on. edit-next-caller Edit the next place this function is called. Ilisp.el allows tight integration with the lisp subprocess by sending messages to the subprocess "behind-the-scenes" over the user's connection. It does not assume a multithreaded lisp (as in Franz Inc.'s Allegro Common Lisp). (However, it could certainly be ported to take advantage of a multithreaded lisp, providing greater communications robustness without altering the interface functionality at all. Anyone interested in doing so should contact Chris.) Ilisp can be customised for most major dialects of Lisp and Scheme. This package is so massive it is being released in a separate post by Chris. I've included a dumb, simple inferior-lisp package in this release, as well (cmulisp.el). - A new package, background.el that allows you to run background processes in buffers. This was adapted for comint.el from Joe Keane's background.el. - A very hairy TeX and LaTeX package. This includes buffer validation, command entry commands, process interfaces to TeX, LaTeX, dvi printers and previewers. Pieces of this have been contributed by many people, notably Steve Anderson, Stephen Gildea, Dorab Patel, and Ashwin Ram. - Lots of tweaks to the basic comint package, many contributed by other people. + A new input history command comint-previous-similar-input (M-s) taken from some LispM interface. This is *quite* useful. + The other input history commands have been improved. + Filename completion has been improved. + By popular demand, return now jumps to the end of line before submitting input (this is settable, but defaults to the eol behavior). + New hooks for mode hackers. + comint-exec no longer dependent on etc/env program. + Process communication via pipes supported better. + Simple process-query facility available. + New procedures for sending input to processes that avoid hanging on large text blocks. - Tweaks to the other packages: + Improved directory tracking in cmushell.el. It now handles all forms of pushd and popd. New commands dirtrack-toggle and dirs toggle the directory tracking machinery off and on, and resync the mode's directory stack with the shell's. + cmushell and cmulisp modes now reside in separate files cmushell.el and cmulisp.el. Not only is this a good idea, it's apparently the way it'll be rel 19. N.B.: CMULISP USERS MUST CHANGE THEIR .EMACS AUTOLOAD'S ACCORDINGLY. + better support for multiple processes in cmulisp, cmuscheme and tea modes. + cmulisp has some simple query commands, for function and variable documentation, describing symbols, and getting function arglists. This is a simple facility; Chris McConnell's ilisp package is much more featureful. It was based on some code contributed by Doug Roberts. + cmulisp, cmuscheme, and tea now have a command (c-x c-e) to eval the last sexp. The keybinding is compatible with emacs lisp and Hemlock. + Filename defaults in Scheme and Lisp modes will use the string the cursor is over, if it's an existing filename. This is a debatable decision. Feedback appreciated. GENERAL NOTES =============================================================================== Directory tracking: The new directory tracking code will handle pushd [+n | <dir>] popd [+n] cd [<dir>] The emacs command M-x dirs will stuff a "dirs" at the process, wait for a line of output, parse it up, and reset the buffer's directory stack accordingly. The emacs command M-x dirtrack-toggle will toggle the directory tracking machinery on and off. This is useful, for example, when you are running ftp, and don't want ftp's "cd" command to throw emacs off. The new code was based on source contributed by Vince Broman, Mike Coffin, Jeff Peck, and Barry Warsaw. Its structure should allow zealous shell hackers to extend it pretty easily. The commands that directory tracking looks for are customisable. If you define aliases for cd or pushd or popd, you can set the right emacs variables and win. Note that in general, complex directory tracking is a losing game. You can't win. If you have a programmable shell, an excellent hack is to program the directory-changing commands to type code sequences at the terminal, and write a process filter to watch for these sequences. A sequence like "ESC D <length> <directory>" where <directory> is <length> characters long would do fine. (Using a <length> parameter instead of string delimeters prevents emacs from gobbling up unbounded amounts of shell output in the event the terminating delimiter gets lost.) Multiple process buffers: Many people suggest ways to run multiple shell buffers. This does not require extra features. Suppose you want two shell buffers. Simply make a shell buffer with M-x cmushell, and then rename it with M-x rename-buffer. Make the next shell with M-x cmushell, and now you've got two. Use M-x cmushell to get to the newest one, and C-x b <bufname> to get to the other. Multiple Lisp and Scheme buffers work similarly. Commands that send text from a source buffer to the process buffer will always send to the buffer with the "official" name unless you explicitly override this (see variable lisp/scheme/tea-buffer). I don't see any real good ways to extend this. You could associate each source buffer with some process buffer, but this gets messy. I've tried to keep it simple. If you find yourself switching between multiple process buffers a lot, consider using ilisp.el. Or write a little code to soup up cmulisp.el. Documentation: There is no manual or info node for any of this stuff. I am not going to write one. Feel free to write one if you like, and submit it to me or the FSF. It would be a good thing. The .el files are copiously documented, however. If you want to use any of these modes, I strongly suggest that you read the source files. Really. Do it. They contain many useful sections of comments. Skip anything you don't understand; read the easy parts. You may find some useful commands you didn't know about. The top of each file contains a clearly-marked, friendly "suggestions for your .emacs file" section that will show you exactly how to get set up using the package. Also, pay attention to the DEFVAR'd variables. These are typically the means by which you can customise the package for your local environment. The usual on-line documentation on modes, variables and commands is also available via c-h m, c-h v, and c-h d. =============================================================================== A shar file for the source files follows. This code is available under the terms of the Gnu Copyright agreement: you can do whatever you like with it as long as you don't charge for it or hold me responsible for anything it does. Please send any comments, improvements, bug reports, fixes or suggestions to olin.shivers@cs.cmu.edu. I would like to thank all the people who took the time to send me the code that went into this second release. -Olin June 12, 1990 =============================================================================== # # type sh /afs/cs.cmu.edu/user/shivers/lib/emacs/sh2 to unpack this archive. # echo extracting cmushell.el... cat >cmushell.el <<'!E!O!F!' ;;; -*-Emacs-Lisp-*- General command interpreter in a window stuff ;;; Copyright Olin Shivers (1988). ;;; Please imagine a long, tedious, legalistic 5-page gnu-style copyright ;;; notice appearing here to the effect that you may use this code any ;;; way you like, as long as you don't charge money for it, remove this ;;; notice, or hold me liable for its results. ;;; The changelog is at the end of file. ;;; Please send me bug reports, bug fixes, and extensions, so that I can ;;; merge them into the master source. ;;; - Olin Shivers (shivers@cs.cmu.edu) ;;; This file defines a a shell-in-a-buffer package (cmushell mode) built on ;;; top of comint mode. Cmushell mode is similar to, and intended to replace, ;;; its counterpart in the standard gnu emacs release. This replacement is ;;; more featureful, robust, and uniform than the released 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 cmushell 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? (require 'comint) (provide 'cmushell) ;; YOUR .EMACS FILE ;;============================================================================= ;; Some suggestions for your .emacs file. ;; ;; ; If cmushell lives in some non-standard directory, you must tell emacs ;; ; where to get it. This may or may not be necessary. ;; (setq load-path (cons (expand-file-name "~jones/lib/emacs") load-path)) ;; ;; ; Autoload cmushell from file cmushell.el ;; (autoload 'cmushell "cmushell" ;; "Run an inferior shell process." ;; t) ;; ;; ; Define C-c C-t to run my favorite command in cmushell mode: ;; (setq cmushell-load-hook ;; '((lambda () ;; (define-key cmushell-mode-map "\C-c\C-t" 'favorite-cmd)))) ;;; Brief Command Documentation: ;;;============================================================================ ;;; Comint Mode Commands: (common to cmushell and all comint-derived modes) ;;; ;;; m-p comint-previous-input Cycle backwards in input history ;;; m-n comint-next-input Cycle forwards ;;; c-c r comint-previous-input-matching Search backwards in input history ;;; return comint-send-input ;;; c-a comint-bol Beginning of line; skip prompt. ;;; c-d comint-delchar-or-maybe-eof Delete char unless at end of buff. ;;; c-c c-u comint-kill-input ^u ;;; c-c c-w backward-kill-word ^w ;;; c-c c-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 ;;; 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: ;;; cmushell Fires up the shell process. ;;; m-tab comint-dynamic-complete Complete a partial file name ;;; m-? comint-dynamic-list-completions List completions in help buffer ;;; dirs Resync the buffer's dir stack. ;;; dirtrack-toggle Turn dir tracking on/off. ;;; ;;; The cmushell mode hook is cmushell-mode-hook ;;; The cmushell-load-hook is run after this file is loaded. ;;; comint-prompt-regexp is initialised to shell-prompt-pattern, for backwards ;;; compatibility. ;;; Read the rest of this file for more information. ;;; SHELL.EL COMPATIBILITY ;;;============================================================================ ;;; In brief: this package should have no trouble coexisting with shell.el. ;;; ;;; Most customising variables -- e.g., explicit-shell-file-name -- are the ;;; same, so the users shouldn't have much trouble. Hooks have different ;;; names, however, so you can customise shell mode differently from cmushell ;;; mode. You basically just have to remember to type M-x cmushell instead of ;;; M-x shell. ;;; ;;; It would be nice if this file was completely plug-compatible with the old ;;; shell package -- if you could just name this file shell.el, and have it ;;; transparently replace the old one. But you can't. Several other packages ;;; (tex-mode, background, dbx, gdb, kermit, monkey, prolog, telnet) are also ;;; clients of shell mode. These packages assume detailed knowledge of shell ;;; mode internals in ways that are incompatible with cmushell mode (mostly ;;; because of cmushell mode's greater functionality). So, unless we are ;;; willing to port all of these packages, we can't have this file be a ;;; complete replacement for shell.el -- that is, we can't name this file ;;; shell.el, and its main entry point (shell), because dbx.el will break ;;; when it loads it in and tries to use it. ;;; ;;; There are two ways to fix this. One: rewrite these other modes to use the ;;; new package. This is a win, but can't be assumed. The other, backwards ;;; compatible route, is to make this package non-conflict with shell.el, so ;;; both files can be loaded in at the same time. And *that* is why some ;;; functions and variables have different names: (cmushell), ;;; cmushell-mode-map, that sort of thing. All the names have been carefully ;;; chosen so that shell.el and cmushell.el won't tromp on each other. ;;; Customisation and Buffer Variables ;;; =========================================================================== ;;; ;In loaddefs.el now. ;(defconst shell-prompt-pattern ; "^[^#$%>]*[#$%>] *" ; "*Regexp used by Newline command to match subshell prompts. ;;; Change the doc string for shell-prompt-pattern: (put 'shell-prompt-pattern 'variable-documentation "Regexp to match prompts in the inferior shell. Defaults to \"^[^#$%>]*[#$%>] *\", which works pretty well. This variable is used to initialise comint-prompt-regexp in the shell buffer. This is a fine thing to set in your .emacs file.") (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-cd-regexp "cd" "*Regexp to match subshell commands equivalent to cd.") (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 cmushell, if the shell is csh. Value is a list of strings, which may be nil.") ;;; All the above vars aren't prefixed "cmushell-" to make them ;;; backwards compatible w/shell.el and old .emacs files. (defvar cmushell-dirstack nil "List of directories saved by pushd in this buffer's shell.") (defvar cmushell-dirstack-query "dirs" "Command used by shell-resync-dirlist to query shell.") (defvar cmushell-mode-map '()) (cond ((not cmushell-mode-map) (setq cmushell-mode-map (full-copy-sparse-keymap comint-mode-map)) (define-key cmushell-mode-map "\M-\t" 'comint-dynamic-complete) (define-key cmushell-mode-map "\M-?" 'comint-dynamic-list-completions))) (defvar cmushell-mode-hook '() "*Hook for customising cmushell mode") ;;; Basic Procedures ;;; =========================================================================== ;;; (defun cmushell-mode () "Major mode for interacting with an inferior shell. Return after the end of the process' output sends the text from the end of process to the end of the current line. Return before end of process output copies rest of line to end (skipping the prompt) and sends it. M-x send-invisible reads a line of text without echoing it, and sends it to the shell. 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. M-x dirs queries the shell and resyncs Emacs' idea of what the current directory stack is. M-x dirtrack-toggle turns directory tracking on and off. \\{cmushell-mode-map} Customisation: Entry to this mode runs the hooks on comint-mode-hook and cmushell-mode-hook (in that order). Variables shell-cd-regexp, shell-pushd-regexp and shell-popd-regexp are used to match their respective commands." (interactive) (comint-mode) (setq comint-prompt-regexp shell-prompt-pattern) (setq major-mode 'cmushell-mode) (setq mode-name "CMU shell") (use-local-map cmushell-mode-map) (make-local-variable 'cmushell-dirstack) (setq cmushell-dirstack nil) (make-local-variable 'cmushell-dirtrackp) (setq cmushell-dirtrackp t) (setq comint-input-sentinel 'cmushell-directory-tracker) (run-hooks 'cmushell-mode-hook)) (defun cmushell () "Run an inferior shell, with I/O through buffer *cmushell*. If buffer exists but shell process is not running, make new shell. If buffer exists and shell process is running, just switch to buffer *cmushell*. 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 cmushell-mode, giving commands for sending input and controlling the subjobs of the shell. See cmushell-mode. See also variable shell-prompt-pattern. The shell file name (sans directories) is used to make a symbol name such as `explicit-csh-arguments'. 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) (cond ((not (comint-check-proc "*cmushell*")) (let* ((prog (or explicit-shell-file-name (getenv "ESHELL") (getenv "SHELL") "/bin/sh")) (name (file-name-nondirectory prog)) (startfile (concat "~/.emacs_" name)) (xargs-name (intern-soft (concat "explicit-" name "-args")))) (set-buffer (apply 'make-comint "cmushell" prog (if (file-exists-p startfile) startfile) (if (and xargs-name (boundp xargs-name)) (symbol-value xargs-name) '("-i")))) (cmushell-mode)))) (switch-to-buffer "*cmushell*")) ;;; Directory tracking ;;; =========================================================================== ;;; This code provides the cmushell mode input sentinel ;;; CMUSHELL-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 released version in shell.el. It has the following failings: ;;; 1. It doesn't know about the cdpath shell variable. ;;; 2. It only spots the first command in a command sequence. E.g., it will ;;; miss the cd in "ls; cd foo" ;;; 3. More generally, any complex command (like ";" sequencing) is going to ;;; throw it. Otherwise, you'd have to build an entire shell interpreter in ;;; emacs lisp. Failing that, there's no way to catch shell commands where ;;; cd's are buried inside conditional expressions, aliases, and so forth. ;;; ;;; 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* effect 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. ;;; REGEXP is a regular expression. STR is a string. START is a fixnum. ;;; Returns T if REGEXP matches STR where the match is anchored to start ;;; at position START in STR. Sort of like LOOKING-AT for strings. (defun cmushell-front-match (regexp str start) (eq start (string-match regexp str start))) (defun cmushell-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-pushd-regexp, and shell-popd-regexp." (cond (cmushell-dirtrackp (string-match "^\\s *" str) ; skip whitespace (let ((bos (match-end 0)) (x nil)) (cond ((setq x (cmushell-match-cmd-w/optional-arg shell-popd-regexp str bos)) (cmushell-process-popd x)) ((setq x (cmushell-match-cmd-w/optional-arg shell-pushd-regexp str bos)) (cmushell-process-pushd x)) ((setq x (cmushell-match-cmd-w/optional-arg shell-cd-regexp str bos)) (cmushell-process-cd x))))))) ;;; Try to match regexp CMD to string, anchored at position START. ;;; CMD may be followed by a single argument. If a match, then return ;;; the argument, if there is one, or the empty string if not. If ;;; no match, return nil. (defun cmushell-match-cmd-w/optional-arg (cmd str start) (and (cmushell-front-match cmd str start) (let ((eoc (match-end 0))) ; end of command (cond ((cmushell-front-match "\\s *\$\;\\|$\$" str eoc) "") ; no arg ((cmushell-front-match "\\s +\$[^ \t\;]+\$\\s *\$\;\\|$\$" str eoc) (substring str (match-beginning 1) (match-end 1))) ; arg (t nil))))) ; something else. ;;; The first regexp is [optional whitespace, (";" or the end of string)]. ;;; The second regexp is [whitespace, (an arg), optional whitespace, ;;; (";" or end of string)]. ;;; popd [+n] (defun cmushell-process-popd (arg) (let ((num (if (zerop (length arg)) 0 ; no arg means +0 (cmushell-extract-num arg)))) (if (and num (< num (length cmushell-dirstack))) (if (= num 0) ; condition-case because the CD could lose. (condition-case nil (progn (cd (car cmushell-dirstack)) (setq cmushell-dirstack (cdr cmushell-dirstack)) (cmushell-dirstack-message)) (error (message "Couldn't cd."))) (let* ((ds (cons nil cmushell-dirstack)) (cell (nthcdr (- num 1) ds))) (rplacd cell (cdr (cdr cell))) (setq cmushell-dirstack (cdr ds)) (cmushell-dirstack-message))) (message "Bad popd.")))) ;;; cd [dir] (defun cmushell-process-cd (arg) (condition-case nil (progn (cd (if (zerop (length arg)) (getenv "HOME") arg)) (cmushell-dirstack-message)) (error (message "Couldn't cd.")))) ;;; pushd [+n | dir] (defun cmushell-process-pushd (arg) (if (zerop (length arg)) ;; no arg -- swap pwd and car of shell stack (condition-case nil (if cmushell-dirstack (let ((old default-directory)) (cd (car cmushell-dirstack)) (setq cmushell-dirstack (cons old (cdr cmushell-dirstack))) (cmushell-dirstack-message)) (message "Directory stack empty.")) (message "Couldn't cd.")) (let ((num (cmushell-extract-num arg))) (if num ; pushd +n (if (> num (length cmushell-dirstack)) (message "Directory stack not that deep.") (let* ((ds (cons default-directory cmushell-dirstack)) (dslen (length ds)) (front (nthcdr num ds)) (back (reverse (nthcdr (- dslen num) (reverse ds)))) (new-ds (append front back))) (condition-case nil (progn (cd (car new-ds)) (setq cmushell-dirstack (cdr new-ds)) (cmushell-dirstack-message)) (error (message "Couldn't cd."))))) ;; pushd <dir> (let ((old-wd default-directory)) (condition-case nil (progn (cd arg) (setq cmushell-dirstack (cons old-wd cmushell-dirstack)) (cmushell-dirstack-message)) (error (message "Couldn't cd.")))))))) ;; If STR is of the form +n, for n>0, return n. Otherwise, nil. (defun cmushell-extract-num (str) (and (string-match "^\\+[1-9][0-9]*$" str) (string-to-int str))) (defun cmushell-dirtrack-toggle () "Turn directory tracking on and off in a cmushell buffer." (interactive) (setq cmushell-dirtrackp (not cmushell-dirtrackp)) (message "directory tracking %s." (if cmushell-dirtrackp "ON" "OFF"))) ;;; For your typing convenience: (fset 'dirtrack-toggle 'cmushell-dirtrack-toggle) (defun cmushell-resync-dirs () "Resync the buffer's idea of the current directory stack. This command queries the shell with the command bound to cmushell-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 cmushell-dirstack-query) (insert "\n") (sit-for 0) ; force redisplay (comint-send-string proc cmushell-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) (- (match-end 0) 1))) (dl-len (length dl)) (ds '()) ; new dir stack (i 0)) (while (< i dl-len) ;; regexp = optional whitespace, (non-whitespace), optional whitespace (string-match "\\s *\$\\S +\$\\s *" dl i) ; pick off next dir (setq ds (cons (substring dl (match-beginning 1) (match-end 1)) ds)) (setq i (match-end 0))) (let ((ds (reverse ds))) (condition-case nil (progn (cd (car ds)) (setq cmushell-dirstack (cdr ds)) (cmushell-dirstack-message)) (error (message "Couldn't cd."))))))) ;;; For your typing convenience: (fset 'dirs 'cmushell-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 cmushell-dirstack-message () (let ((msg "") (ds (cons default-directory cmushell-dirstack))) (while ds (let ((dir (car ds))) (if (string-match (format "^%s\$/\\|$\$" (getenv "HOME")) dir) (setq dir (concat "~/" (substring dir (match-end 0))))) (if (string-equal dir "~/") (setq dir "~")) (setq msg (concat msg dir " ")) (setq ds (cdr ds)))) (message msg))) ;;; Interfacing to client packages (and converting them) ;;;============================================================================ ;;; Several gnu packages (tex-mode, background, dbx, gdb, kermit, prolog, ;;; telnet are some) use the shell package as clients. Most of them would ;;; be better off using the comint package directly, but they predate it. ;;; The catch is that most of these packages (dbx, gdb, prolog, telnet) ;;; assume total knowledge of all the local variables that shell mode ;;; functions depend on. So they (kill-all-local-variables), then create ;;; the few local variables that shell.el functions depend on. Alas, ;;; cmushell.el functions depend on a different set of vars (for example, ;;; the input history ring is a local variable in cmushell.el's shell mode, ;;; whereas there is no input history ring in shell.el's shell mode). ;;; So we have a situation where the greater functionality of cmushell.el ;;; is biting us -- you can't just replace shell will cmushell. ;;; ;;; Altering these packages to use comint mode directly should *greatly* ;;; improve their functionality, and is actually pretty easy. It's ;;; mostly a matter of renaming a few variable names. See comint.el for more. ;;; -Olin ;;; Do the user's customisation... ;;;=============================== (defvar cmushell-load-hook nil "This hook is run when cmushell is loaded in. This is a good place to put keybindings.") (run-hooks 'cmushell-load-hook) ;;; Change Log ;;; =========================================================================== ;;; Olin 8/88 ;;; Created. ;;; ;;; Olin 5/26/90 ;;; - Split cmulisp and cmushell modes into separate files. ;;; Not only is this a good idea, it's apparently the way it'll be rel 19. ;;; - Souped up the directory tracking; it now can handle pushd, pushd +n, ;;; and popd +n. ;;; - Added cmushell-dirtrack-toggle command to toggle the directory ;;; tracking that cmushell tries to do. This is useful, for example, ;;; when you are running ftp -- it prevents the ftp "cd" command from ;;; spoofing the tracking machinery. This command is also named ;;; dirtrack-toggle, so you need only type M-x dirtrack to run it. ;;; - Added cmushell-resync-dirs command. This queries the shell ;;; for the current directory stack, and resets the buffer's stack ;;; accordingly. This command is also named dirs, so you need only type ;;; M-x dirs to run it. ;;; - Bits of the new directory tracking code were adapted from source ;;; contributed by Vince Broman, Jeff Peck, and Barry Warsaw. ;;; - See also the improvements made to comint.el at the same time. ;;; - Renamed several variables. Mostly this comprised changing "shell" ;;; to "cmushell" in the names. The only variables that are not prefixed ;;; with "cmushell-" are the ones that are common with shell.el: ;;; explicit-shell-file-name shell-prompt-pattern explicit-csh-args ;;; and shell-cd/popd/pushd-regexp ;;; The variables and functions that were changed to have "cmushell-" ;;; prefixes are: ;;; shell-directory-stack (v), shell-directory-tracker (f) ;;; This should not affect users, only elisp hackers. Hopefully ;;; one day shell.el will just go away, and we can drop all this ;;; "cmushell" bullshit. ;;; - Upgraded process sends to use comint-send-string instead of ;;; process-send-string. !E!O!F! # # type sh /afs/cs.cmu.edu/user/shivers/lib/emacs/sh2 to unpack this archive. # echo extracting tea.el... cat >tea.el <<'!E!O!F!' ;;; tea.el -- Teach emacs about T. ;;; Copyright Olin Shivers (1988) ;;; Please imagine a long, tedious, legalistic 5-page gnu-style copyright ;;; notice appearing here to the effect that you may use this code any ;;; way you like, as long as you don't charge money for it, remove this ;;; notice, or hold me liable for its results. ;;; ;;; 1. Major mode for editing T source: t-mode ;;; This is just a variant of scheme-mode, tweaked for T. ;;; 2. Major mode for running T in a buffer: run-tea ;;; This is a customisation of comint-mode. ;;; ;;; Written by Olin Shivers (olin.shivers@cs.cmu.edu). With bits and pieces ;;; lifted from scheme.el, shell.el, clisp.el, newclisp.el, cobol.el, et al.. ;;; 8/88 ;;; Please send me bug reports, bug fixes, and extensions, so that I can ;;; merge them into the master source. ;;; ;;; Change log at end of file. ;; YOUR .EMACS FILE ;;============================================================================= ;; Some suggestions for your .emacs file. ;; ;; ; If tea.el lives in some non-standard directory, you must tell emacs ;; ; where to get it. This may or may not be necessary. ;; (setq load-path (cons (expand-file-name "~jones/lib/emacs") load-path)) ;; ;; ; Autoload run-tea and t-mode from file tea.el ;; (autoload 'run-tea "tea" ;; "Run an inferior T process." ;; t) ;; ;; (autoload 't-mode "tea" ;; "Major mode for editing T source. Just Scheme mode, tuned a bit." ;; t) ;; ;; ; Files ending in ".t" are T source, so put their buffers in t-mode. ;; (setq auto-mode-alist ;; (cons '("\\.t$" . t-mode) ;; auto-mode-alist)) ;; ;; ; Define C-c C-t to run my favorite command in inferior T mode: ;; (setq tea-load-hook ;; '((lambda () (define-key inferior-t-mode-map "\C-c\C-t" ;; 'favorite-cmd)))) ;; ETAGS ;;============================================================================= ;; A suggestion for modifying the etags program so that it knows about T. ;; You should modify the few lines that allow etags to conclude that ;; files that end with ".t" are lisp or scheme source code. ;; Find a line that looks like ;; /* .scm or .sm or .scheme implies scheme source code */ ;; and add a ;; !strcmp (cp + 1, "t") || ;; suffix check to the following clauses that check filename suffixes. ;; This is already done for some versions of etags. Have a look, or try it ;; & see. (setq scheme-mit-dialect nil) ; Give me a break. (require 'scheme) (require 'cmushell) ;;; T mode stuff ;;;============================================================================ ;;; Note: T mode alters the scheme-mode syntax table and indentation ;;; hooks slightly. If you were using scheme-mode and t-mode simultaneously ;;; this might be a problem, except that the alterations are fairly ;;; innocuous. ;; This adds [] and {} as matching delimiters. So emacs will treat #[Char 0] ;; or #{Procedure 1 ADD} as an s-exp with a quote sign in front. (modify-syntax-entry ?[ "(]" scheme-mode-syntax-table) (modify-syntax-entry ?] ")[" scheme-mode-syntax-table) (modify-syntax-entry ?{ "(}" scheme-mode-syntax-table) (modify-syntax-entry ?} "){" scheme-mode-syntax-table) ;; Modify scheme-indent-hook for T. (put 'labels 'scheme-indent-hook 1) (put 'block 'scheme-indent-hook 0) (put 'block0 'scheme-indent-hook 0) (put 'object 'scheme-indent-hook 1) (put 'lset 'scheme-indent-hook 1) (put 'xcase 'scheme-indent-hook 1) (put 'select 'scheme-indent-hook 1) (put 'xselect 'scheme-indent-hook 1) (put 'iterate 'scheme-indent-hook 2) (put 'cond 'scheme-indent-hook 0) (put 'xcond 'scheme-indent-hook 0) (put 'catch 'scheme-indent-hook 1) (put 'bind 'scheme-indent-hook 1) (put 'define-operation 'scheme-indent-hook 1) (put 'operation 'scheme-indent-hook 1) (put 'object 'scheme-indent-hook 1) (put 'join 'scheme-indent-hook 0) (put 'destructure 'scheme-indent-hook 1) (put 'destructure* 'scheme-indent-hook 1) (put 'define-integrable 'scheme-indent-hook 1) (put 'define-constant 'scheme-indent-hook 1) (put 'define-syntax 'scheme-indent-hook 1) (put 'let-syntax 'scheme-indent-hook 1) (put 'define-local-syntax 'scheme-indent-hook 1) (put 'macro-expander 'scheme-indent-hook 1) (put 'with-open-streams 'scheme-indent-hook 1) (put 'with-open-ports 'scheme-indent-hook 1) (put 'with-input-from-string 'scheme-indent-hook 1) (put 'with-output-to-string 'scheme-indent-hook 1) (put 'with-output-width-string 'scheme-indent-hook 1) (put 'receive 'scheme-indent-hook 2) (put 'receive-values 'scheme-indent-hook 1) (defvar t-mode-hook nil "*Hook for customising T mode") (defvar t-mode-map (full-copy-sparse-keymap scheme-mode-map)) (defun t-mode () "Major mode for editing T code. This is Scheme mode, slightly tuned for T. Editing commands are similar to those of Lisp mode. In addition, if an inferior T process is running, some additional commands will be defined, for evaluating expressions and controlling the interpreter, and the state of the process will be displayed in the modeline of all T buffers. The names of commands that interact with the T process start with \"tea-\". For more information see the documentation for inferior-t-mode. Commands: Delete converts tabs to spaces as it moves back. Blank lines separate paragraphs. Semicolons start comments. \\{t-mode-map} Customisation: Entry to this mode runs the hooks on t-mode-hook" (interactive) (kill-all-local-variables) (use-local-map t-mode-map) (scheme-mode-variables) (setq major-mode 't-mode) (setq mode-name "T") (run-hooks 't-mode-hook)) ;;; INFERIOR T MODE STUFF ;;;============================================================================ (defvar inferior-t-mode-map nil) (cond ((not inferior-t-mode-map) (setq inferior-t-mode-map (full-copy-sparse-keymap comint-mode-map)) (scheme-mode-commands inferior-t-mode-map) (define-key inferior-t-mode-map "\M-\C-x" 'tea-send-definition) (define-key inferior-t-mode-map "\C-x\C-e" 'tea-send-last-sexp) (define-key inferior-t-mode-map "\C-cl" 'tea-load-file) (define-key inferior-t-mode-map "\C-ck" 'tea-compile-file) ;"kompile" )) ;; Install the process communication commands in the scheme-mode keymap. (define-key t-mode-map "\M-\C-x" 'tea-send-definition) ; gnu convention (define-key t-mode-map "\C-x\C-e" 'tea-send-last-sexp) ; gnu convention (define-key t-mode-map "\C-ce" 'tea-send-definition) (define-key t-mode-map "\C-c\C-e" 'tea-send-definition-and-go) (define-key t-mode-map "\C-cr" 'tea-send-region) (define-key t-mode-map "\C-c\C-r" 'tea-send-region-and-go) (define-key t-mode-map "\C-cc" 'tea-compile-definition) (define-key t-mode-map "\C-c\C-c" 'tea-compile-definition-and-go) (define-key t-mode-map "\C-cz" 'switch-to-tea) (define-key t-mode-map "\C-cl" 'tea-load-file) (define-key t-mode-map "\C-ck" 'tea-compile-file) (defvar inferior-t-mode-hook nil "*Hook for customising inferior-T mode") (defun inferior-t-mode () "Major mode for interacting with an inferior T process. The following commands are available: \\{inferior-t-mode-map} A T process can be fired up with M-x run-tea. Customisation: Entry to this mode runs the hooks on comint-mode-hook and inferior-t-mode-hook (in that order). You can send text to the inferior T process from other buffers containing T source. switch-to-tea switches the current buffer to the T process buffer. tea-send-definition sends the current definition to the T process. tea-compile-definition compiles the current definition. tea-send-region sends the current region to the T process. tea-compile-region compiles the current region. tea-send-definition-and-go, tea-compile-definition-and-go, tea-send-region-and-go, and tea-compile-region-and-go switch to the T process buffer after sending their text. For information on running multiple processes in multiple buffers, see documentation for variable tea-buffer. Commands: Return after the end of the process' output sends the text from the end of process to point. Return before the end of the process' output copies the sexp ending at point to the end of the process' output, and sends it. Delete converts tabs to spaces as it moves back. Tab indents for T; with argument, shifts rest of expression rigidly with the current line. C-M-q does Tab on each line starting within following expression. Paragraphs are separated only by blank lines. Semicolons start comments. If you accidentally suspend your process, use \\[comint-continue-subjob] to continue it." (interactive) (comint-mode) (setq comint-prompt-regexp "^>+ *") ; Customise in inferior-t-mode-hook (scheme-mode-variables) (setq major-mode 'inferior-t-mode) (setq mode-name "Inferior T") (setq mode-line-process '(": %s")) (use-local-map inferior-t-mode-map) (setq comint-input-filter 'tea-input-filter) (setq comint-input-sentinel 'ignore) (setq comint-get-old-input 'tea-get-old-input) (run-hooks 'inferior-t-mode-hook)) (defun tea-input-filter (str) "Don't save anything matching tea-filter-regexp" (not (string-match tea-filter-regexp str))) (defvar tea-filter-regexp "\\`\\s *\\S ?\\S ?\\s *\\'" "*Input matching this regexp are not saved on the history list. Defaults to a regexp ignoring all inputs of 0, 1, or 2 letters.") (defun tea-get-old-input () "Snarf the sexp ending at point" (save-excursion (let ((end (point))) (backward-sexp) (buffer-substring (point) end)))) ;;; This will break if you have an argument with whitespace, as in ;;; string = "-ab +c -x 'you lose'". (defun tea-args-to-list (string) (let ((where (string-match "[ \t]" string))) (cond ((null where) (list string)) ((not (= where 0)) (cons (substring string 0 where) (tea-args-to-list (substring string (+ 1 where) (length string))))) (t (let ((pos (string-match "[^ \t]" string))) (if (null pos) nil (tea-args-to-list (substring string pos (length string))))))))) (defvar tea-program-name "t" "*Program invoked by the run-tea command") ;;; Obsolete (defun tea (&rest foo) (message "Use run-tea")) (defun run-tea (cmd) "Run an inferior T process, input and output via buffer *tea*. If there is a process already running in *tea*, just switch to that buffer. With argument, allows you to edit the command line (default is value of tea-program-name). Runs the hooks from inferior-t-mode-hook (after the comint-mode-hook is run). \(Type \\[describe-mode] in the process buffer for a list of commands.)" (interactive (list (if current-prefix-arg (read-string "Run T: " tea-program-name) tea-program-name))) (if (not (comint-check-proc "*tea*")) (let ((cmdlist (tea-args-to-list cmd))) (set-buffer (apply 'make-comint "tea" (car cmdlist) nil (cdr cmdlist))) (inferior-t-mode))) (setq tea-buffer "*tea*") (switch-to-buffer "*tea*")) (defun tea-send-region (start end) "Send the current region to the inferior T process" (interactive "r") (comint-send-region (tea-proc) start end) (comint-send-string (tea-proc) "\n")) (defun tea-send-definition () "Send the current definition to the inferior T process." (interactive) (save-excursion (end-of-defun) (let ((end (point))) (beginning-of-defun) (tea-send-region (point) end)))) (defun tea-send-last-sexp () "Send the previous sexp to the inferior T process." (interactive) (tea-send-region (save-excursion (backward-sexp) (point)) (point))) (defun tea-compile-region (start end) "Compile the current region in the inferior T process. \(A BLOCK is wrapped around the region: (BLOCK <region>)" (interactive "r") (comint-send-string (tea-proc) "(orbit '(block ") (comint-send-region (tea-proc) start end) (comint-send-string (tea-proc) "))\n")) (defun tea-compile-definition () "Compile the current definition in the inferior T process." (interactive) (save-excursion (end-of-defun) (let ((end (point))) (beginning-of-defun) (tea-compile-region (point) end)))) (defun switch-to-tea (eob-p) "Switch to the T process buffer. With argument, positions cursor at end of buffer." (interactive "P") (if (get-buffer tea-buffer) (pop-to-buffer tea-buffer) (error "No current process buffer. See variable tea-buffer.")) (cond (eob-p (push-mark) (goto-char (point-max))))) (defun tea-send-region-and-go (start end) "Send the current region to the inferior T process, and switch to the process buffer." (interactive "r") (tea-send-region start end) (switch-to-tea t)) (defun tea-send-definition-and-go () "Send the current definition to the inferior T process, and switch to the process buffer." (interactive) (tea-send-definition) (switch-to-tea t)) (defun tea-compile-region-and-go (start end) "Compile the current region in the inferior T process, and switch to process buffer." (interactive "r") (tea-compile-region start end) (switch-to-tea t)) (defun tea-compile-definition-and-go () "Compile the current definition in the inferior T process, and switch to process buffer." (interactive) (tea-compile-definition) (switch-to-tea t)) (defvar tea-source-modes '(t-mode) "*Used to determine if a buffer contains T source code. If it's loaded into a buffer that is in one of these major modes, it's considered a T source file by tea-load-file and tea-compile-file. Used by these commands to determine defaults.") (defvar tea-prev-l/c-dir/file nil "Caches the (directory . file) pair used in the last tea-load-file or tea-compile-file command. Used for determining the default in the next one.") (defun tea-load-file (file-name) "Load a T file into the inferior T process." (interactive (comint-get-source "Load T file: " tea-prev-l/c-dir/file tea-source-modes t)) ; T because LOAD needs ; an exact name. (comint-check-source file-name) ; Check to see if buffer needs saved. (setq tea-prev-l/c-dir/file (cons (file-name-directory file-name) (file-name-nondirectory file-name))) (comint-send-string (tea-proc) (concat "(load \"" file-name "\"\)\n")) (switch-to-tea t)) (defun tea-compile-file (file-name) "Compile a T file in the inferior T process." (interactive (comint-get-source "Compile T file: " tea-prev-l/c-dir/file tea-source-modes nil)) ; NIL because COMPILE doesn't ; need an exact name. (comint-check-source file-name) ; Check to see if buffer needs saved. (setq tea-prev-l/c-dir/file (cons (file-name-directory file-name) (file-name-nondirectory file-name))) (comint-send-string (tea-proc) (concat "(compile-file \"" file-name "\"\)\n")) (switch-to-tea t)) ;;; This helps when you run more than one T process at a time. ;;; If we're in some inferior T buffer, return its process, ;;; even if the buffer's been renamed. If we're elsewhere, assume ;;; the standard process named "tea". (defun tea-proc () (let ((proc (get-buffer-process (current-buffer)))) (if (and proc (eq major-mode 'inferior-t-mode)) proc (get-process "tea")))) (defvar tea-buffer nil "*The current T process buffer. MULTIPLE PROCESS SUPPORT =========================================================================== Tea.el supports, in a fairly simple fashion, running multiple T processes. To run multiple T processes, you start the first up with \\[run-tea]. It will be in a buffer named *tea*. Rename this buffer with \\[rename-buffer]. You may now start up a new process with another \\[run-tea]. It will be in a new buffer, named *tea*. You can switch between the different process buffers with \\[switch-to-buffer]. Commands that send text from source buffers to T processes -- like tea-send-definition or tea-compile-region -- have to choose a process to send to, when you have more than one T process around. This is determined by the global variable tea-buffer. Suppose you have three inferior T's running: Buffer Process foo tea bar tea<2> *tea* tea<3> If you do a \\[tea-send-definition-and-go] command on some T source code, what process do you send it to? - If you're in a process buffer (foo, bar, or *tea*), you send it to that process. - If you're in some other buffer (e.g., a source file), you send it to the process attached to buffer tea-buffer. This process selection is performed by function tea-proc. Whenever \\[run-tea] fires up a new process, it resets tea-buffer to be the new process's buffer. If you only run one process, this will do the right thing. If you run multiple processes, you can change tea-buffer to another process buffer with \\[set-variable]. More sophisticated approaches are, of course, possible. If you find youself needing to switch back and forth between multiple processes frequently, you may wish to consider ilisp.el, a larger, more sophisticated package for running inferior Lisp and Scheme processes. The approach taken here is for a minimal, simple implementation. Feel free to extend it.") (defun tea-proc () "Returns the current T process. See variable tea-buffer." (let ((proc (get-buffer-process (if (eq major-mode 'inferior-t-mode) (current-buffer) tea-buffer)))) (or proc (error "No current process. See variable tea-buffer")))) ;;; Do the user's customisation... (defvar tea-load-hook nil "This hook is run when tea is loaded in. This is a good place to put keybindings.") (run-hooks 'tea-load-hook) ;;; CHANGE LOG ;;; =========================================================================== ;;; 8/88 Olin ;;; Created. ;;; ;;; 2/15/89 Olin ;;; Removed -emacs flag from process invocation. It's only useful for ;;; cscheme, and makes cscheme assume it's running under xscheme.el, ;;; which messes things up royally. A bug. ;;; ;;; 5/22/90 Olin ;;; Upgraded to use comint-send-string and comint-send-region. ;;; - run-tea now offers to let you edit the command line if ;;; you invoke it with a prefix-arg. M-x tea is redundant, and ;;; has been removed. ;;; - Explicit references to process "tea" have been replaced with ;;; (tea-proc). This allows better handling of multiple process bufs. ;;; - Added tea-send-last-sexp, bound to C-x C-e. A gnu convention. ;;; - Have not added process query facility a la cmulisp.el's lisp-show-arglist ;;; and friends, but interested hackers might find a useful application ;;; of this facility. !E!O!F!