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authorWilliam Waites <wwaites@tardis.ed.ac.uk>2013-09-25 12:18:55 +0100
committerEric Schulte <schulte.eric@gmail.com>2013-09-25 09:12:38 -0600
commit7e35a32524c22907be3463f4a9811644eb242a7a (patch)
tree7aeb66b1e3c901af065364b6248054a21a73c8a1
parent5f73d93711bc0c2b697e01b3ce7ac14fe1b40bcf (diff)
downloadorg-mode-7e35a32524c22907be3463f4a9811644eb242a7a.tar.gz
Initial version of ABC notation handling for Babel
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+;;; ob-abc.el --- org-babel functions for template evaluation
+
+;; Copyright (C) Free Software Foundation
+
+;; Author: William Waites
+;; Keywords: literate programming, music
+;; Homepage: http://www.tardis.ed.ac.uk/wwaites
+;; Version: 0.01
+
+;;; License:
+
+;; 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:
+
+;;; This file adds support to Org Babel for music in ABC notation.
+;;; It requires that the abcm2ps program is installed.
+;;; See http://moinejf.free.fr/
+
+(require 'ob)
+
+;; optionally define a file extension for this language
+(add-to-list 'org-babel-tangle-lang-exts '("abc" . "abc"))
+
+;; optionally declare default header arguments for this language
+(defvar org-babel-default-header-args:abc
+ '((:results . "file") (:exports . "results"))
+ "Default arguments to use when evaluating an ABC source block.")
+
+(defun org-babel-expand-body:abc (body params)
+ "Expand BODY according to PARAMS, return the expanded body."
+ (let ((vars (mapcar #'cdr (org-babel-get-header params :var))))
+ (mapc
+ (lambda (pair)
+ (let ((name (symbol-name (car pair)))
+ (value (cdr pair)))
+ (setq body
+ (replace-regexp-in-string
+ (concat "\$" (regexp-quote name))
+ (if (stringp value) value (format "%S" value))
+ body))))
+ vars)
+ body))
+
+(defun org-babel-execute:abc (body params)
+ "Execute a block of ABC code with org-babel. This function is
+ called by `org-babel-execute-src-block'"
+ (message "executing Abc source code block")
+ (let* ((result-params (split-string (or (cdr (assoc :results params)))))
+ (cmdline (cdr (assoc :cmdline params)))
+ (out-file ((lambda (el)
+ (or el
+ (error "abc code block requires :file header argument")))
+ ;;; For SVG or EPS output, abcm2ps will add a number for a particular page
+ ;;; automatically. This needs to be specified in the :file argument and stripped
+ ;;; stripped out here. There is likely a better way to do this.
+ (replace-regexp-in-string "001" "" (cdr (assoc :file params)))))
+ (in-file (org-babel-temp-file "abc-"))
+ (cmd (concat "abcm2ps" " " cmdline
+ " -O " (org-babel-process-file-name out-file)
+ " " (org-babel-process-file-name in-file))))
+ (with-temp-file in-file (insert (org-babel-expand-body:abc body params)))
+ (org-babel-eval cmd "")
+ ;;; indicate that the file has been written
+ nil))
+
+;; This function should be used to assign any variables in params in
+;; the context of the session environment.
+(defun org-babel-prep-session:abc (session params)
+ "Return an error because abc does not support sessions."
+ (error "ABC does not support sessions"))
+
+(provide 'ob-abc)
+;;; ob-abc.el ends here