-;;; riece-ruby.el --- interact with ruby interpreter
+;;; riece-ruby.el --- interact with Ruby interpreter
;; Copyright (C) 1998-2005 Daiki Ueno
;; Author: Daiki Ueno <ueno@unixuser.org>
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
+;;; Commentary:
+
+;; riece-ruby.el is a library to interact with the Ruby interpreter.
+;; It supports concurrent execution of Ruby programs in a single
+;; session. For example:
+;;
+;; (riece-ruby-execute "sleep 30"); returns immediately
+;; => "rubyserv0"
+;;
+;; (riece-ruby-execute "1 + 1")
+;; => "rubyserv1"
+;;
+;; (riece-ruby-execute "\"")
+;; => "rubyserv2"
+;;
+;; (riece-ruby-inspect "rubyserv0")
+;; => ((OK nil) nil "running")
+;;
+;; (riece-ruby-inspect "rubyserv1")
+;; => ((OK nil) "2" "finished")
+;;
+;; (riece-ruby-inspect "rubyserv2")
+;; => ((OK nil) "(eval):1: unterminated string meets end of file" "exited")
+
;;; Code:
-(defvar riece-ruby-command "ruby"
- "Command name for Ruby interpreter.")
+(defgroup riece-ruby nil
+ "Interact with the Ruby interpreter."
+ :group 'riece)
+
+(defcustom riece-ruby-command "ruby"
+ "Command name for Ruby interpreter."
+ :type 'string
+ :group 'riece-ruby)
+
+(defvar riece-ruby-server-program "server.rb"
+ "The server program file. If the filename is not absolute, it is
+assumed that the file is in the same directory of this file.")
+
+(defvar riece-ruby-process nil
+ "Process object of the Ruby interpreter.")
-(defun riece-ruby-substitute-variables (program variable value)
+(defvar riece-ruby-lock nil
+ "Lock for waiting server response.
+Local to the process buffer.")
+(defvar riece-ruby-response nil
+ "The server response.
+Local to the process buffer.")
+(defvar riece-ruby-data nil
+ "Data from server.
+Local to the process buffer.")
+(defvar riece-ruby-escaped-data nil
+ "Escaped data from server. This variable is cleared every time
+server response arrives.
+Local to the process buffer.")
+(defvar riece-ruby-status-alist nil
+ "Status from server.
+Local to the process buffer.")
+
+(defvar riece-ruby-output-handler-alist nil
+ "An alist mapping from program name to output handler.
+Output handlers are called every time \"# output\" line arrives.
+Use `riece-ruby-set-output-handler' to set this variable.")
+(defvar riece-ruby-exit-handler-alist nil
+ "An alist mapping from program name to exit handler.
+Exit handlers are called once when \"# exit\" line arrives.
+Use `riece-ruby-set-exit-handler' to set this variable.")
+
+(defun riece-ruby-substitute-variables (program alist)
(setq program (copy-sequence program))
- (let ((pointer program))
- (while pointer
- (setq pointer (memq variable program))
- (if pointer
- (setcar pointer value)))
- program))
+ (while alist
+ (let ((pointer program))
+ (while pointer
+ (setq pointer (memq (car (car alist)) program))
+ (if pointer
+ (setcar pointer (cdr (car alist))))))
+ (setq alist (cdr alist)))
+ (apply #'concat program))
(defun riece-ruby-escape-data (data)
(let ((index 0))
index (- (match-end 0) 2)))
data))
-(defun riece-ruby-start ()
- (start-process "riece-ruby"
- (generate-new-buffer " *Ruby*")
- riece-ruby-command
- (expand-file-name "rubyserv.rb"
- (file-name-directory
- (symbol-file 'riece-ruby-start)))))
-
-(defun riece-ruby-execute (process program &optional callback)
- (set-process-filter process #'riece-ruby-filter)
- (set-process-sentinel process #'riece-ruby-sentinel)
- (with-current-buffer (process-buffer process)
- (make-local-variable 'riece-ruby-callback)
- (setq riece-ruby-callback callback)
+(defun riece-ruby-reset-process-buffer ()
+ (save-excursion
+ (set-buffer (process-buffer riece-ruby-process))
+ (buffer-disable-undo)
+ (make-local-variable 'riece-ruby-response)
+ (setq riece-ruby-response nil)
(make-local-variable 'riece-ruby-data)
- (setq riece-ruby-data nil))
- (process-send-string process
- (concat "EVAL " (riece-ruby-escape-data program)
- "\n")))
+ (setq riece-ruby-data nil)
+ (make-local-variable 'riece-ruby-escaped-data)
+ (setq riece-ruby-escaped-data nil)
+ (make-local-variable 'riece-ruby-status-alist)
+ (setq riece-ruby-status-alist nil)))
+
+(defun riece-ruby-send-eval (program)
+ (let* ((string (riece-ruby-escape-data program))
+ (length (- (length string) 998))
+ (index 0)
+ data)
+ (while (< index length)
+ (setq data (cons (substring string index (setq index (+ index 998)))
+ data)))
+ (setq data (cons (substring string index) data)
+ data (nreverse data))
+ (process-send-string riece-ruby-process "EVAL\r\n")
+ (while data
+ (process-send-string riece-ruby-process
+ (concat "D " (car data) "\r\n"))
+ (setq data (cdr data)))
+ (process-send-string riece-ruby-process "END\r\n")))
+
+(defun riece-ruby-send-poll (name)
+ (process-send-string riece-ruby-process
+ (concat "POLL " name "\r\n")))
+
+(defun riece-ruby-send-exit (name)
+ (process-send-string riece-ruby-process
+ (concat "EXIT " name "\r\n")))
(defun riece-ruby-filter (process input)
(save-excursion
(insert input)
(goto-char (process-mark process))
(beginning-of-line)
- (while (looking-at ".*\r?\n")
- (if (looking-at "OK\\( \\(.*\\)\\)?")
+ (while (looking-at ".*\r\n")
+ (if (looking-at "OK\\( \\(.*\\)\\)?\r")
(progn
- (funcall riece-ruby-callback
- (list 'OK
- (match-string 2)
- (riece-ruby-unescape-data
- (apply #'concat (nreverse riece-ruby-data)))))
- (setq riece-ruby-data nil))
- (if (looking-at "ERR \\([0-9]+\\)\\( \\(.*\\)\\)?")
+ (if riece-ruby-escaped-data
+ (setq riece-ruby-data (mapconcat #'riece-ruby-unescape-data
+ riece-ruby-escaped-data "")))
+ (setq riece-ruby-escaped-data nil
+ riece-ruby-response (list 'OK (match-string 2))
+ riece-ruby-lock nil))
+ (if (looking-at "ERR \\([0-9]+\\)\\( \\(.*\\)\\)?\r")
(progn
- (funcall riece-ruby-callback
- (list 'ERR
- (number-to-string (match-string 1))
- (match-string 3)
- (riece-ruby-unescape-data
- (apply #'concat (nreverse riece-ruby-data)))))
- (setq riece-ruby-data nil))
- (if (looking-at "D \\(.*\\)")
- (setq riece-ruby-data (cons (match-string 1) riece-ruby-data)))))
- (forward-line))))
+ (setq riece-ruby-escaped-data nil
+ riece-ruby-response
+ (list 'ERR (string-to-number (match-string 2))
+ (match-string 3))
+ riece-ruby-lock nil))
+ (if (looking-at "D \\(.*\\)\r")
+ (setq riece-ruby-escaped-data (cons (match-string 1)
+ riece-ruby-escaped-data))
+ (if (looking-at "S \\(.*\\) \\(.*\\)\r")
+ (progn
+ (setq riece-ruby-status-alist (cons (cons (match-string 1)
+ (match-string 2))
+ riece-ruby-status-alist))
+ (if (member (car (car riece-ruby-status-alist))
+ '("finished" "exited"))
+ (riece-ruby-run-exit-handler
+ (cdr (car riece-ruby-status-alist)))))
+ (if (looking-at "# output \\(.*\\) \\(.*\\)\r")
+ (let ((entry (assoc (match-string 1)
+ riece-ruby-output-handler-alist)))
+ (if entry
+ (funcall (car entry) (cdr entry) (match-string 2))))
+ (if (looking-at "# exit \\(.*\\)\r")
+ (riece-ruby-run-exit-handler (match-string 1))))))))
+ (forward-line))
+ (set-marker (process-mark process) (point-marker))))
+
+(defun riece-ruby-run-exit-handler (name)
+ (let ((entry (assoc name riece-ruby-exit-handler-alist)))
+ (if entry
+ (progn
+ (funcall (cdr entry) (car entry))
+ (setq riece-ruby-exit-handler-alist (delq entry))))))
(defun riece-ruby-sentinel (process status)
(kill-buffer (process-buffer process)))
+(defun riece-ruby-execute (program)
+ (unless (and riece-ruby-process
+ (eq (process-status riece-ruby-process) 'run))
+ (let (selective-display
+ (coding-system-for-write 'binary)
+ (coding-system-for-read 'binary))
+ (setq riece-ruby-process
+ (start-process "riece-ruby" (generate-new-buffer " *Ruby*")
+ riece-ruby-command
+ (if (file-name-absolute-p riece-ruby-server-program)
+ riece-ruby-server-program
+ (expand-file-name
+ riece-ruby-server-program
+ (file-name-directory
+ (symbol-file 'riece-ruby-execute))))))
+ (set-process-filter riece-ruby-process #'riece-ruby-filter)
+ (set-process-sentinel riece-ruby-process #'riece-ruby-sentinel)))
+ (save-excursion
+ (set-buffer (process-buffer riece-ruby-process))
+ (riece-ruby-reset-process-buffer)
+ (make-local-variable 'riece-ruby-lock)
+ (setq riece-ruby-lock t)
+ (riece-ruby-send-eval program)
+ (while riece-ruby-lock
+ (accept-process-output riece-ruby-process))
+ (if (eq (car riece-ruby-response) 'ERR)
+ (error "Couldn't execute: %S" (cdr riece-ruby-response)))
+ (cdr (assoc "name" riece-ruby-status-alist))))
+
+(defun riece-ruby-inspect (name)
+ (save-excursion
+ (set-buffer (process-buffer riece-ruby-process))
+ (riece-ruby-reset-process-buffer)
+ (make-local-variable 'riece-ruby-lock)
+ (setq riece-ruby-lock t)
+ (riece-ruby-send-poll name)
+ (while (null riece-ruby-response)
+ (accept-process-output riece-ruby-process))
+ (list riece-ruby-response
+ riece-ruby-data
+ riece-ruby-status-alist)))
+
+(defun riece-ruby-clear (name)
+ (save-excursion
+ (set-buffer (process-buffer riece-ruby-process))
+ (riece-ruby-reset-process-buffer)
+ (make-local-variable 'riece-ruby-lock)
+ (setq riece-ruby-lock t)
+ (riece-ruby-send-exit name)
+ (while (null riece-ruby-response)
+ (accept-process-output riece-ruby-process))))
+
+(defun riece-ruby-set-exit-handler (name handler)
+ (let ((entry (assoc name riece-ruby-exit-handler-alist)))
+ (if entry
+ (setcdr entry handler)
+ (setq riece-ruby-exit-handler-alist
+ (cons (cons name handler)
+ riece-ruby-exit-handler-alist)))
+ ;;check if the program already exited
+ (riece-ruby-inspect)))
+
+(defun riece-ruby-set-output-handler (name handler)
+ (let ((entry (assoc name riece-ruby-output-handler-alist)))
+ (if entry
+ (setcdr entry handler)
+ (setq riece-ruby-output-handler-alist
+ (cons (cons name handler)
+ riece-ruby-output-handler-alist)))))
+
(provide 'riece-ruby)
;;; riece-ruby.el ends here
projects / riece / blobdiff