295 lines
12 KiB
EmacsLisp
295 lines
12 KiB
EmacsLisp
;;; ob-oz.el --- Org-babel functions for Oz evaluation
|
|
|
|
;; Copyright (C) 2009-2013 Torsten Anders and Eric Schulte
|
|
|
|
;; Author: Torsten Anders and Eric Schulte
|
|
;; Keywords: literate programming, reproducible research
|
|
;; Homepage: http://orgmode.org
|
|
;; Version: 0.02
|
|
|
|
;; This file is not part of GNU Emacs.
|
|
|
|
;; This program is free software; you can redistribute it and/or modify
|
|
;; it under the terms of the GNU General Public License as published by
|
|
;; the Free Software Foundation; either version 3, or (at your option)
|
|
;; any later version.
|
|
;;
|
|
;; This program is distributed in the hope that it will be useful,
|
|
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
;; GNU General Public License for more details.
|
|
;;
|
|
;; You should have received a copy of the GNU General Public License
|
|
;; along with GNU Emacs; see the file COPYING. If not, write to the
|
|
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
;; Boston, MA 02110-1301, USA.
|
|
|
|
;;; Commentary:
|
|
|
|
;; Org-Babel support for evaluating Oz source code.
|
|
;;
|
|
;; Oz code is always send to the Oz Programming Environment (OPI), the
|
|
;; Emacs mode and compiler interface for Oz programs. Therefore, only
|
|
;; session mode is supported. In practice, non-session code blocks are
|
|
;; handled equally well by the session mode. However, only a single
|
|
;; session is supported. Consequently, the :session header argument is
|
|
;; ignored.
|
|
;;
|
|
;; The Org-babel header argument :results is interpreted as
|
|
;; follows. :results output requires the respective code block to be
|
|
;; an Oz statement and :results value requires an Oz
|
|
;; expression. Currently, results are only supported for expressions
|
|
;; (i.e. the result of :results output is always nil).
|
|
;;
|
|
;; Expression evaluation happens synchronously. Therefore there is an
|
|
;; additional header argument :wait-time <number>, which specifies the
|
|
;; maximum time to wait for the result of a given expression. nil
|
|
;; means to wait as long as it takes to get a result (potentially wait
|
|
;; forever).
|
|
;;
|
|
;; NOTE: Currently the copyright of this file may not be in a state to
|
|
;; permit inclusion as core software into Emacs or Org-mode.
|
|
|
|
;;; Requirements:
|
|
|
|
;; - Mozart Programming System, the implementation of the Oz
|
|
;; programming language (http://www.mozart-oz.org/), which includes
|
|
;; the major mode mozart for editing Oz programs.
|
|
;;
|
|
;; - StartOzServer.oz which is located in the contrib/scripts
|
|
;; directory of the Org-mode repository
|
|
|
|
;;; TODO:
|
|
|
|
;; - Decide: set communication to \\switch -threadedqueries?
|
|
;;
|
|
;; - Only start Oz compiler when required, e.g., load Org-babel only when needed?
|
|
;;
|
|
;; - Avoid synchronous evaluation to avoid blocking Emacs (complex
|
|
;; Strasheela programs can take long to find a result..). In order
|
|
;; to cleanly map code blocks to their associated results (which can
|
|
;; arrive then in any order) I could use IDs
|
|
;; (e.g. integers). However, how do I do concurrency in Emacs Lisp,
|
|
;; and how can I define org-babel-execute:oz concurrently.
|
|
;;
|
|
;; - Expressions are rarely used in Oz at the top-level, and using
|
|
;; them in documentation and Literate Programs will cause
|
|
;; confusion. Idea: hide expression from reader and instead show
|
|
;; them statement (e.g., MIDI output statement) and then include
|
|
;; result in Org file. Implementation: for expressions (:results
|
|
;; value) support an additional header argument that takes arbitrary
|
|
;; Oz code. This code is not seen by the reader, but will be used
|
|
;; for the actual expression at the end. Alternative: feed all
|
|
;; relevant code as statement (:results output), then add expression
|
|
;; as extra code block which outputs, e.g., file name (so the file
|
|
;; name must be accessible by global var), but the code of this
|
|
;; extra codeblock is not seen. Hm, in that case it might be even
|
|
;; more easy to manually add this link to the Org file.
|
|
;;
|
|
|
|
|
|
(require 'ob)
|
|
;;; major mode for editing Oz programs
|
|
(require 'mozart nil t)
|
|
|
|
;;
|
|
;; Interface to communicate with Oz.
|
|
;; (1) For statements without any results: oz-send-string
|
|
;; (2) For expressions with a single result: oz-send-string-expression
|
|
;; (defined in org-babel-oz-ResultsValue.el)
|
|
;;
|
|
|
|
;; oz-send-string-expression implements an additional very direct
|
|
;; communication between Org-babel and the Oz compiler. Communication
|
|
;; with the Oz server works already without this code via the function
|
|
;; oz-send-string from mozart.el.in, but this function does not get
|
|
;; back any results from Oz to Emacs. The following code creates a
|
|
;; socket for sending code to the OPI compiler and results are
|
|
;; returned by the same socket. On the Oz side, a socket is opened and
|
|
;; conected to the compiler of the OPI (via oz-send-string). On the
|
|
;; Emacs side, a connection to this socket is created for feeding code
|
|
;; and receiving results. This additional communication channel to the
|
|
;; OPI compiler ensures that results are returned cleanly (e.g., only
|
|
;; the result of the sent code is returned, no parsing or any
|
|
;; processing of *Oz Emulator* is required).
|
|
;;
|
|
;; There is no buffer, nor sentinel involved. Oz code is send
|
|
;; directly, and results from Oz are send back, but Emacs Lisp
|
|
;; requires a filter function for processing results.
|
|
|
|
(defvar org-babel-oz-server-dir
|
|
(file-name-as-directory
|
|
(expand-file-name
|
|
"contrib/scripts"
|
|
(file-name-as-directory
|
|
(expand-file-name
|
|
"../../.."
|
|
(file-name-directory (or load-file-name buffer-file-name))))))
|
|
"Path to the contrib/scripts directory in which
|
|
StartOzServer.oz is located.")
|
|
|
|
(defvar org-babel-oz-port 6001
|
|
"Port for communicating with Oz compiler.")
|
|
(defvar org-babel-oz-OPI-socket nil
|
|
"Socket for communicating with OPI.")
|
|
|
|
(defvar org-babel-oz-collected-result nil
|
|
"Aux var to hand result from org-babel-oz-filter to oz-send-string-expression.")
|
|
(defun org-babel-oz-filter (proc string)
|
|
"Processes output from socket org-babel-oz-OPI-socket."
|
|
;; (setq org-babel-oz-collected-results (cons string org-babel-oz-collected-results))
|
|
(setq org-babel-oz-collected-result string)
|
|
)
|
|
|
|
|
|
(defun org-babel-oz-create-socket ()
|
|
(message "Create OPI socket for evaluating expressions")
|
|
;; Start Oz directly
|
|
(run-oz)
|
|
;; Create socket on Oz side (after Oz was started).
|
|
(oz-send-string (concat "\\insert '" org-babel-oz-server-dir "StartOzServer.oz'"))
|
|
;; Wait until socket is created before connecting to it.
|
|
;; Quick hack: wait 3 sec
|
|
;;
|
|
;; extending time to 30 secs does not help when starting Emacs for
|
|
;; the first time (and computer does nothing else)
|
|
(sit-for 3)
|
|
;; connect to OPI socket
|
|
(setq org-babel-oz-OPI-socket
|
|
;; Creates a socket. I/O interface of Emacs sockets as for processes.
|
|
(open-network-stream "*Org-babel-OPI-socket*" nil "localhost" org-babel-oz-port))
|
|
;; install filter
|
|
(set-process-filter org-babel-oz-OPI-socket #'org-babel-oz-filter)
|
|
)
|
|
|
|
;; communication with org-babel-oz-OPI-socket is asynchronous, but
|
|
;; oz-send-string-expression turns is into synchronous...
|
|
(defun oz-send-string-expression (string &optional wait-time)
|
|
"Similar to oz-send-string, oz-send-string-expression sends a string to the OPI compiler. However, string must be expression and this function returns the result of the expression (as string). oz-send-string-expression is synchronous, wait-time allows to specify a maximum wait time. After wait-time is over with no result, the function returns nil."
|
|
(if (not org-babel-oz-OPI-socket)
|
|
(org-babel-oz-create-socket))
|
|
(let ((polling-delay 0.1)
|
|
result)
|
|
(process-send-string org-babel-oz-OPI-socket string)
|
|
;; wait for result
|
|
(if wait-time
|
|
(let ((waited 0))
|
|
(unwind-protect
|
|
(progn
|
|
(while
|
|
;; stop loop if org-babel-oz-collected-result \= nil or waiting time is over
|
|
(not (or (not (equal org-babel-oz-collected-result nil))
|
|
(> waited wait-time)))
|
|
(progn
|
|
(sit-for polling-delay)
|
|
;; (message "org-babel-oz: next polling iteration")
|
|
(setq waited (+ waited polling-delay))))
|
|
;; (message "org-babel-oz: waiting over, got result or waiting timed out")
|
|
;; (message (format "wait-time: %s, waited: %s" wait-time waited))
|
|
(setq result org-babel-oz-collected-result)
|
|
(setq org-babel-oz-collected-result nil))))
|
|
(unwind-protect
|
|
(progn
|
|
(while (equal org-babel-oz-collected-result nil)
|
|
(sit-for polling-delay))
|
|
(setq result org-babel-oz-collected-result)
|
|
(setq org-babel-oz-collected-result nil))))
|
|
result))
|
|
|
|
(defun org-babel-expand-body:oz (body params)
|
|
(let ((vars (mapcar #'cdr (org-babel-get-header params :var))))
|
|
(if vars
|
|
;; prepend code to define all arguments passed to the code block
|
|
(let ((var-string (mapcar (lambda (pair)
|
|
(format "%s=%s"
|
|
(car pair)
|
|
(org-babel-oz-var-to-oz (cdr pair))))
|
|
vars)))
|
|
;; only add var declarations if any variables are there
|
|
(mapconcat #'identity
|
|
(append (list "local") var-string (list "in" body "end"))
|
|
"\n"))
|
|
body)))
|
|
|
|
(defun org-babel-execute:oz (body params)
|
|
"Execute a block of Oz code with org-babel. This function is
|
|
called by `org-babel-execute-src-block' via multiple-value-bind."
|
|
(let* ((result-params (cdr (assoc :result-params params)))
|
|
(full-body (org-babel-expand-body:oz body params))
|
|
(wait-time (plist-get params :wait-time)))
|
|
;; actually execute the source-code block
|
|
(org-babel-reassemble-table
|
|
(cond
|
|
((member "output" result-params)
|
|
(message "Org-babel: executing Oz statement")
|
|
(oz-send-string full-body))
|
|
((member "value" result-params)
|
|
(message "Org-babel: executing Oz expression")
|
|
(oz-send-string-expression full-body (or wait-time 1)))
|
|
(t (error "either 'output' or 'results' must be members of :results.")))
|
|
(org-babel-pick-name (cdr (assoc :colname-names params))
|
|
(cdr (assoc :colnames params)))
|
|
(org-babel-pick-name (cdr (assoc :roname-names params))
|
|
(cdr (assoc :rownames params))))))
|
|
|
|
;; This function should be used to assign any variables in params in
|
|
;; the context of the session environment.
|
|
(defun org-babel-prep-session:oz (session params)
|
|
"Prepare SESSION according to the header arguments specified in PARAMS."
|
|
(error "org-babel-prep-session:oz unimplemented"))
|
|
;; TODO: testing... (copied from org-babel-haskell.el)
|
|
;; (defun org-babel-prep-session:oz (session params)
|
|
;; "Prepare SESSION according to the header arguments specified in PARAMS."
|
|
;; (save-window-excursion
|
|
;; (org-babel-oz-initiate-session session)
|
|
;; (let* ((vars (org-babel-ref-variables params))
|
|
;; (var-lines (mapconcat ;; define any variables
|
|
;; (lambda (pair)
|
|
;; (format "%s=%s"
|
|
;; (car pair)
|
|
;; (org-babel-ruby-var-to-ruby (cdr pair))))
|
|
;; vars "\n"))
|
|
;; (vars-file (concat (make-temp-file "org-babel-oz-vars") ".oz")))
|
|
;; (when vars
|
|
;; (with-temp-buffer
|
|
;; (insert var-lines) (write-file vars-file)
|
|
;; (oz-mode)
|
|
;; ;; (inferior-oz-load-file) ; ??
|
|
;; ))
|
|
;; (current-buffer))))
|
|
;;
|
|
|
|
|
|
;; TODO: testing... (simplified version of def in org-babel-prep-session:ocaml)
|
|
;;
|
|
;; BUG: does not work yet. Error: ad-Orig-error: buffer none doesn't exist or has no process
|
|
;; UNUSED DEF
|
|
(defun org-babel-oz-initiate-session (&optional session params)
|
|
"If there is not a current inferior-process-buffer in SESSION
|
|
then create. Return the initialized session."
|
|
(unless (string= session "none")
|
|
;; TODO: make it possible to have multiple sessions
|
|
(save-window-excursion
|
|
;; (run-oz)
|
|
(get-buffer oz-compiler-buffer))))
|
|
|
|
(defun org-babel-oz-var-to-oz (var)
|
|
"Convert an elisp var into a string of Oz source code
|
|
specifying a var of the same value."
|
|
(if (listp var)
|
|
;; (concat "[" (mapconcat #'org-babel-oz-var-to-oz var ", ") "]")
|
|
(eval var)
|
|
(format "%s" var) ; don't preserve string quotes.
|
|
;; (format "%s" var)
|
|
))
|
|
|
|
;; TODO:
|
|
(defun org-babel-oz-table-or-string (results)
|
|
"If the results look like a table, then convert them into an
|
|
Emacs-lisp table, otherwise return the results as a string."
|
|
(error "org-babel-oz-table-or-string unimplemented"))
|
|
|
|
|
|
(provide 'ob-oz)
|
|
;;; org-babel-oz.el ends here
|