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de42649f7b
e85080 is the last correct commit in the maint branch before releasing 7.8.04. The 7.8.05 release should be done from this commit.
137 lines
4.6 KiB
EmacsLisp
137 lines
4.6 KiB
EmacsLisp
;;; ob-scheme.el --- org-babel functions for Scheme
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;; Copyright (C) 2010-2012 Free Software Foundation, Inc.
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;; Author: Eric Schulte
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;; Keywords: literate programming, reproducible research, scheme
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;; Homepage: http://orgmode.org
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Now working with SBCL for both session and external evaluation.
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;;
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;; This certainly isn't optimally robust, but it seems to be working
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;; for the basic use cases.
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;;; Requirements:
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;; - a working scheme implementation
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;; (e.g. guile http://www.gnu.org/software/guile/guile.html)
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;;
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;; - for session based evaluation cmuscheme.el is required which is
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;; included in Emacs
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;;; Code:
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(require 'ob)
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(require 'ob-ref)
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(require 'ob-comint)
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(require 'ob-eval)
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(eval-when-compile (require 'cl))
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(declare-function run-scheme "ext:cmuscheme" (cmd))
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(defvar org-babel-default-header-args:scheme '()
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"Default header arguments for scheme code blocks.")
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(defvar org-babel-scheme-eoe "org-babel-scheme-eoe"
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"String to indicate that evaluation has completed.")
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(defcustom org-babel-scheme-cmd "guile"
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"Name of command used to evaluate scheme blocks."
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:group 'org-babel
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:type 'string)
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(defun org-babel-expand-body:scheme (body params)
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"Expand BODY according to PARAMS, return the expanded body."
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(let ((vars (mapcar #'cdr (org-babel-get-header params :var))))
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(if (> (length vars) 0)
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(concat "(let ("
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(mapconcat
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(lambda (var) (format "%S" (print `(,(car var) ',(cdr var)))))
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vars "\n ")
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")\n" body ")")
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body)))
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(defvar scheme-program-name)
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(defun org-babel-execute:scheme (body params)
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"Execute a block of Scheme code with org-babel.
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This function is called by `org-babel-execute-src-block'"
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(let* ((result-type (cdr (assoc :result-type params)))
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(org-babel-scheme-cmd (or (cdr (assoc :scheme params))
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org-babel-scheme-cmd))
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(full-body (org-babel-expand-body:scheme body params)))
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(read
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(if (not (string= (cdr (assoc :session params)) "none"))
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;; session evaluation
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(let ((session (org-babel-prep-session:scheme
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(cdr (assoc :session params)) params)))
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(org-babel-comint-with-output
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(session (format "%S" org-babel-scheme-eoe) t body)
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(mapc
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(lambda (line)
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(insert (org-babel-chomp line)) (comint-send-input nil t))
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(list body (format "%S" org-babel-scheme-eoe)))))
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;; external evaluation
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(let ((script-file (org-babel-temp-file "scheme-script-")))
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(with-temp-file script-file
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(insert
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;; return the value or the output
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(if (string= result-type "value")
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(format "(display %s)" full-body)
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full-body)))
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(org-babel-eval
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(format "%s %s" org-babel-scheme-cmd
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(org-babel-process-file-name script-file)) ""))))))
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(defun org-babel-prep-session:scheme (session params)
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"Prepare SESSION according to the header arguments specified in PARAMS."
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(let* ((session (org-babel-scheme-initiate-session session))
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(vars (mapcar #'cdr (org-babel-get-header params :var)))
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(var-lines
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(mapcar
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(lambda (var) (format "%S" (print `(define ,(car var) ',(cdr var)))))
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vars)))
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(when session
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(org-babel-comint-in-buffer session
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(sit-for .5) (goto-char (point-max))
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(mapc (lambda (var)
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(insert var) (comint-send-input nil t)
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(org-babel-comint-wait-for-output session)
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(sit-for .1) (goto-char (point-max))) var-lines)))
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session))
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(defun org-babel-scheme-initiate-session (&optional session)
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"If there is not a current inferior-process-buffer in SESSION
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then create. Return the initialized session."
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(require 'cmuscheme)
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(unless (string= session "none")
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(let ((session-buffer (save-window-excursion
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(run-scheme org-babel-scheme-cmd)
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(rename-buffer session)
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(current-buffer))))
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(if (org-babel-comint-buffer-livep session-buffer)
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(progn (sit-for .25) session-buffer)
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(sit-for .5)
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(org-babel-scheme-initiate-session session)))))
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(provide 'ob-scheme)
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;;; ob-scheme.el ends here
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