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+;;; ob-fomus.el --- org-babel functions for fomus evaluation
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+
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+;; Copyright (C) 2011 Torsten Anders
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+
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+;; Author: Torsten Anders
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+;; Keywords: literate programming, reproducible research
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+;; Homepage: http://orgmode.org
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+;; Version:
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+
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+;;; License:
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+
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+;; This program 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, or (at your option)
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+;; any later version.
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+;;
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+;; This program 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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+;;
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+;; You should have received a copy of the GNU General Public License
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+;; along with GNU Emacs; see the file COPYING. If not, write to the
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+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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+;; Boston, MA 02110-1301, USA.
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+
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+;;; Commentary:
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+
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+;; Org-Babel support for evaluating Fomus source code.
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+;; For information on Fomus see http://fomus.sourceforge.net/
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+;;
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+;; This differs from most standard languages in that
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+;;
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+;; 1) there is no such thing as a "session" in fomus
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+;;
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+;; 2) we are generally only going to return results of type "file"
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+;;
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+;; 3) we are adding the "file" and "cmdline" header arguments
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+;;
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+;; 4) there are no variables (at least for now)
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+
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+;;; Code:
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+(require 'ob)
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+(require 'ob-eval)
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+
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+(defvar org-babel-default-header-args:fomus
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+ '((:results . "file") (:exports . "results"))
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+ "Default arguments to use when evaluating a fomus source block.")
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+
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+(defun org-babel-expand-body:fomus (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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+ (mapc
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+ (lambda (pair)
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+ (let ((name (symbol-name (car pair)))
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+ (value (cdr pair)))
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+ (setq body
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+ (replace-regexp-in-string
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+ (concat "\$" (regexp-quote name))
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+ (if (stringp value) value (format "%S" value))
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+ body))))
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+ vars)
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+ body))
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+
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+(defun org-babel-execute:fomus (body params)
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+ "Execute a block of Fomus code with org-babel.
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+This function is called by `org-babel-execute-src-block'."
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+ (let* ((result-params (cdr (assoc :result-params params)))
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+ (out-file (cdr (assoc :file params)))
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+ (cmdline (cdr (assoc :cmdline params)))
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+ (cmd (or (cdr (assoc :cmd params)) "fomus"))
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+ (in-file (org-babel-temp-file "fomus-" ".fms")))
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+ (with-temp-file in-file
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+ (insert (org-babel-expand-body:fomus body params)))
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+ ;; TMP: testing
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+ ;; (message (concat cmd
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+ ;; " " (org-babel-process-file-name in-file)
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+ ;; " " cmdline
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+ ;; " -o " (org-babel-process-file-name out-file)))
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+ (org-babel-eval
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+ (concat cmd
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+ " " (org-babel-process-file-name in-file)
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+ " " cmdline
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+ " -o " (org-babel-process-file-name out-file)) "")
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+ nil)) ;; signal that output has already been written to file
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+
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+(defun org-babel-prep-session:fomus (session params)
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+ "Return an error because Fomus does not support sessions."
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+ (error "Fomus does not support sessions"))
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+
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+(provide 'ob-fomus)
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+
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+;;; ob-fomus.el ends here
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Eric Schulte