1 ;;; riece-ruby.el --- interact with Ruby interpreter
2 ;; Copyright (C) 1998-2005 Daiki Ueno
4 ;; Author: Daiki Ueno <ueno@unixuser.org>
6 ;; Keywords: IRC, riece, Ruby
8 ;; This file is part of Riece.
10 ;; This program is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
15 ;; This program is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
27 ;; riece-ruby.el is a library to interact with Ruby interpreter.
28 ;; It supports concurrent execution of Ruby programs in a single
29 ;; session. For example:
31 ;; (riece-ruby-execute "sleep 30"); returns immediately
34 ;; (riece-ruby-execute "1 + 1")
37 ;; (riece-ruby-execute "\"")
40 ;; (riece-ruby-inspect "rubyserv0")
41 ;; => ((OK nil) nil (("running")))
43 ;; (riece-ruby-inspect "rubyserv1")
44 ;; => ((OK nil) "2" (("finished")))
46 ;; (riece-ruby-inspect "rubyserv2")
47 ;; => ((OK nil) "(eval):1: unterminated string meets end of file" (("exited")))
51 (require 'riece-debug)
53 (defgroup riece-ruby nil
54 "Interact with Ruby interpreter."
57 (defcustom riece-ruby-command "ruby"
58 "Command name for Ruby interpreter."
62 (defcustom riece-ruby-out-file (expand-file-name "riece-ruby.out"
64 "A file which records stdout of Ruby programs."
68 (defcustom riece-ruby-err-file (expand-file-name "riece-ruby.err"
70 "A file which records stderr of Ruby programs."
74 (defcustom riece-ruby-log-file (expand-file-name "riece-ruby.log"
76 "A file used to logging."
80 (defvar riece-ruby-server-program "server.rb"
81 "The server program file. If the filename is not absolute, it is
82 assumed that the file is in the same directory of this file.")
84 (defvar riece-ruby-server-program-arguments (list "-o" riece-ruby-out-file
85 "-e" riece-ruby-err-file
86 "-l" riece-ruby-log-file)
87 "Command line arguments passed to `riece-ruby-server-program'.")
89 (defvar riece-ruby-process nil
90 "Process object of Ruby interpreter.")
92 (defvar riece-ruby-lock nil
93 "Lock for waiting server response.
94 Local to the process buffer.")
95 (defvar riece-ruby-response nil
97 Local to the process buffer.")
98 (defvar riece-ruby-data nil
100 Local to the process buffer.")
101 (defvar riece-ruby-escaped-data nil
102 "Escaped data from server. This variable is cleared every time
103 server response arrives.
104 Local to the process buffer.")
105 (defvar riece-ruby-status-alist nil
107 Local to the process buffer.")
109 (defvar riece-ruby-output-handler-alist nil
110 "An alist mapping from program name to output handler.
111 Output handlers are called every time \"# output\" line arrives.
112 Use `riece-ruby-set-output-handler' to set this variable.")
113 (defvar riece-ruby-exit-handler-alist nil
114 "An alist mapping from program name to exit handler.
115 Exit handlers are called once when \"# exit\" line arrives.
116 Use `riece-ruby-set-exit-handler' to set this variable.")
117 (defvar riece-ruby-property-alist nil
118 "An alist mapping from program name to the property list.
119 Use `riece-ruby-set-property' to set this variable.")
121 (defun riece-ruby-escape-data (data)
123 (while (string-match "[%\r\n]+" data index)
124 (setq data (replace-match
125 (mapconcat (lambda (c) (format "%%%02X" c))
126 (match-string 0 data) "")
128 index (+ (match-end 0)
129 (* (- (match-end 0) (match-beginning 0)) 2))))
132 (defun riece-ruby-unescape-data (data)
134 (while (string-match "%\\([0-9A-F][0-9A-F]\\)" data index)
135 (setq data (replace-match
136 (read (concat "\"\\x" (match-string 1 data) "\""))
138 index (- (match-end 0) 2)))
141 (defun riece-ruby-reset-process-buffer ()
143 (set-buffer (process-buffer riece-ruby-process))
144 (buffer-disable-undo)
145 (make-local-variable 'riece-ruby-response)
146 (setq riece-ruby-response nil)
147 (make-local-variable 'riece-ruby-data)
148 (setq riece-ruby-data nil)
149 (make-local-variable 'riece-ruby-escaped-data)
150 (setq riece-ruby-escaped-data nil)
151 (make-local-variable 'riece-ruby-status-alist)
152 (setq riece-ruby-status-alist nil)))
154 (defun riece-ruby-send-eval (program)
155 (let* ((string (riece-ruby-escape-data program))
156 (length (- (length string) 998))
159 (while (< index length)
160 (setq data (cons (substring string index (setq index (+ index 998)))
162 (setq data (cons (substring string index) data)
163 data (nreverse data))
164 (process-send-string riece-ruby-process "EVAL\r\n")
166 (process-send-string riece-ruby-process
167 (concat "D " (car data) "\r\n"))
168 (setq data (cdr data)))
169 (process-send-string riece-ruby-process "END\r\n")))
171 (defun riece-ruby-send-poll (name)
172 (process-send-string riece-ruby-process
173 (concat "POLL " name "\r\n")))
175 (defun riece-ruby-send-exit (name)
176 (process-send-string riece-ruby-process
177 (concat "EXIT " name "\r\n")))
179 (defun riece-ruby-filter (process input)
181 (set-buffer (process-buffer process))
182 (goto-char (point-max))
184 (goto-char (point-min))
186 (while (looking-at ".*\r\n")
187 (if (looking-at "OK\\( \\(.*\\)\\)?\r")
189 (if riece-ruby-escaped-data
190 (setq riece-ruby-data (mapconcat #'riece-ruby-unescape-data
191 riece-ruby-escaped-data "")))
192 (setq riece-ruby-escaped-data nil
193 riece-ruby-response (list 'OK (match-string 2))
194 riece-ruby-lock nil))
195 (if (looking-at "ERR \\([0-9]+\\)\\( \\(.*\\)\\)?\r")
197 (setq riece-ruby-escaped-data nil
199 (list 'ERR (string-to-number (match-string 2))
201 riece-ruby-lock nil))
202 (if (looking-at "D \\(.*\\)\r")
203 (setq riece-ruby-escaped-data (cons (match-string 1)
204 riece-ruby-escaped-data))
205 (if (looking-at "S \\([^ ]*\\) \\(.*\\)\r")
207 (setq riece-ruby-status-alist (cons (cons (match-string 1)
209 riece-ruby-status-alist))
210 (if (member (car (car riece-ruby-status-alist))
211 '("finished" "exited"))
212 (riece-ruby-run-exit-handler
213 (cdr (car riece-ruby-status-alist)))))
214 (if (looking-at "# output \\([^ ]*\\) \\(.*\\)\r")
215 (let ((entry (assoc (match-string 1)
216 riece-ruby-output-handler-alist)))
218 (riece-debug-with-backtrace
219 (funcall (cdr entry) (car entry) (match-string 2)))))
220 (if (looking-at "# exit \\(.*\\)\r")
221 (riece-ruby-run-exit-handler (match-string 1))))))))
223 (delete-region (point-min) (point))))
225 (defun riece-ruby-run-exit-handler (name)
226 (let ((entry (assoc name riece-ruby-exit-handler-alist)))
229 (setq riece-ruby-exit-handler-alist
230 (delq entry riece-ruby-exit-handler-alist))
231 (riece-debug-with-backtrace
232 (funcall (cdr entry) (car entry)))
233 (riece-ruby-clear name)))))
235 (defun riece-ruby-sentinel (process status)
236 (kill-buffer (process-buffer process)))
238 (defun riece-ruby-execute (program)
239 "Schedule an execution of a Ruby PROGRAM.
240 Return a string name assigned by the server."
241 (unless (and riece-ruby-process
242 (eq (process-status riece-ruby-process) 'run))
243 (let (selective-display
244 (coding-system-for-write 'binary)
245 (coding-system-for-read 'binary))
246 (setq riece-ruby-process
247 (apply #'start-process "riece-ruby" (generate-new-buffer " *Ruby*")
249 (if (file-name-absolute-p riece-ruby-server-program)
250 riece-ruby-server-program
252 riece-ruby-server-program
255 (symbol-file 'riece-ruby-execute)))))
256 riece-ruby-server-program-arguments))
257 (process-kill-without-query riece-ruby-process)
258 (set-process-filter riece-ruby-process #'riece-ruby-filter)
259 (set-process-sentinel riece-ruby-process #'riece-ruby-sentinel)))
261 (set-buffer (process-buffer riece-ruby-process))
262 (riece-ruby-reset-process-buffer)
263 (make-local-variable 'riece-ruby-lock)
264 (setq riece-ruby-lock t)
265 (riece-ruby-send-eval program)
266 (while riece-ruby-lock
267 (accept-process-output riece-ruby-process))
268 (if (eq (car riece-ruby-response) 'ERR)
269 (error "Couldn't execute: %S" (cdr riece-ruby-response)))
270 (cdr (assoc "name" riece-ruby-status-alist))))
272 (defun riece-ruby-inspect (name)
273 "Inspect a result of program execution distinguished by NAME.
274 Return a three element list.
275 The car is protocol response line which looks like:
276 \(ERR 103 \"Not implemented\").
277 The cadr is data from the server, that is, the result of the program.
278 The caddr is status from the server."
280 (set-buffer (process-buffer riece-ruby-process))
281 (riece-ruby-reset-process-buffer)
282 (make-local-variable 'riece-ruby-lock)
283 (setq riece-ruby-lock t)
284 (riece-ruby-send-poll name)
285 (while riece-ruby-lock
286 (accept-process-output riece-ruby-process))
287 (list riece-ruby-response
289 riece-ruby-status-alist)))
291 (defun riece-ruby-clear (name)
292 "Clear a result of program execution distinguished by NAME.
293 Note that riece-ruby-clear is automatically called iff an exit-handler
294 is specified. Otherwise, it should be called explicitly."
296 (set-buffer (process-buffer riece-ruby-process))
297 (riece-ruby-reset-process-buffer)
298 (make-local-variable 'riece-ruby-lock)
299 (setq riece-ruby-lock t)
300 (riece-ruby-send-exit name)
301 (while riece-ruby-lock
302 (accept-process-output riece-ruby-process)))
303 (let ((entry (assoc name riece-ruby-property-alist)))
305 (delq entry riece-ruby-property-alist))))
307 (defun riece-ruby-set-exit-handler (name handler)
308 "Set an exit-handler HANDLER for the program distinguished by NAME.
309 An exit-handler is called when the program is finished or exited abnormally.
310 An exit-handler is called with an argument same as NAME.
311 Note that riece-ruby-clear is automatically called iff an exit-handler
312 is specified. Otherwise, it should be called explicitly."
313 (let ((entry (assoc name riece-ruby-exit-handler-alist)))
317 (setcdr entry handler)
318 (setq riece-ruby-exit-handler-alist
319 (cons (cons name handler)
320 riece-ruby-exit-handler-alist)))
321 ;;check if the program already exited
322 (riece-ruby-inspect name))
324 (setq riece-ruby-exit-handler-alist
325 (delq entry riece-ruby-exit-handler-alist))))))
327 (defun riece-ruby-set-output-handler (name handler)
328 "Set an output-handler HANDLER for the program distinguished by NAME.
329 An output-handler is called when the program sends any output by using
330 `output' method in the Ruby program.
331 An output-handler is called with two argument. The first argument is
332 the same as NAME. The second argument is output string."
333 (let ((entry (assoc name riece-ruby-output-handler-alist)))
337 (setcdr entry handler)
338 (setq riece-ruby-output-handler-alist
339 (cons (cons name handler)
340 riece-ruby-output-handler-alist))))
342 (setq riece-ruby-output-handler-alist
343 (delq entry riece-ruby-output-handler-alist))))))
345 (defun riece-ruby-set-property (name property value)
346 "Set given PROPERTY/VALUE pair to the program distinguished by NAME."
347 (let ((entry (assoc name riece-ruby-property-alist))
350 (setq entry (list name)
351 riece-ruby-property-alist (cons entry riece-ruby-property-alist)))
352 (if (setq property-entry (assoc property (cdr entry)))
353 (setcdr property-entry value)
354 (setcdr entry (cons (cons property value) (cdr entry))))))
356 (defun riece-ruby-property (name property)
357 "Return the value of PROPERTY set to the program distinguished by NAME."
358 (cdr (assoc property (cdr (assoc name riece-ruby-property-alist)))))
360 (defun riece-ruby-substitute-variables (program alist)
361 "Substitute symbols in PROGRAM by looking up ALIST.
362 Return a string concatenating elements in PROGRAM."
363 (setq program (copy-sequence program))
365 (let ((pointer program))
367 (setq pointer (memq (car (car alist)) program))
369 (setcar pointer (cdr (car alist))))))
370 (setq alist (cdr alist)))
371 (apply #'concat program))
373 (provide 'riece-ruby)
375 ;;; riece-ruby.el ends here