| commit | author | age | ||
| 76bbd0 | 1 | ;;; ob-abc.el --- Org Babel Functions for ABC -*- lexical-binding: t; -*- |
| C | 2 | |
| 3 | ;; Copyright (C) 2013-2018 Free Software Foundation, Inc. | |
| 4 | ||
| 5 | ;; Author: William Waites | |
| 6 | ;; Keywords: literate programming, music | |
| 7 | ;; Homepage: http://www.tardis.ed.ac.uk/wwaites | |
| 8 | ;; Version: 0.01 | |
| 9 | ||
| 10 | ;; This file is part of GNU Emacs. | |
| 11 | ||
| 12 | ;; GNU Emacs is free software: you can redistribute it and/or modify | |
| 13 | ;; it under the terms of the GNU General Public License as published by | |
| 14 | ;; the Free Software Foundation, either version 3 of the License, or | |
| 15 | ;; (at your option) any later version. | |
| 16 | ||
| 17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
| 18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 20 | ;; GNU General Public License for more details. | |
| 21 | ||
| 22 | ;; You should have received a copy of the GNU General Public License | |
| 23 | ;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. | |
| 24 | ||
| 25 | ;;; Commentary: | |
| 26 | ||
| 27 | ;;; This file adds support to Org Babel for music in ABC notation. | |
| 28 | ;;; It requires that the abcm2ps program is installed. | |
| 29 | ;;; See http://moinejf.free.fr/ | |
| 30 | ||
| 31 | (require 'ob) | |
| 32 | ||
| 33 | ;; optionally define a file extension for this language | |
| 34 | (add-to-list 'org-babel-tangle-lang-exts '("abc" . "abc")) | |
| 35 | ||
| 36 | ;; optionally declare default header arguments for this language | |
| 37 | (defvar org-babel-default-header-args:abc | |
| 38 | '((:results . "file") (:exports . "results")) | |
| 39 | "Default arguments to use when evaluating an ABC source block.") | |
| 40 | ||
| 41 | (defun org-babel-expand-body:abc (body params) | |
| 42 | "Expand BODY according to PARAMS, return the expanded body." | |
| 43 | (let ((vars (org-babel--get-vars params))) | |
| 44 | (mapc | |
| 45 | (lambda (pair) | |
| 46 | (let ((name (symbol-name (car pair))) | |
| 47 | (value (cdr pair))) | |
| 48 | (setq body | |
| 49 | (replace-regexp-in-string | |
| 50 | (concat "\$" (regexp-quote name)) | |
| 51 | (if (stringp value) value (format "%S" value)) | |
| 52 | body)))) | |
| 53 | vars) | |
| 54 | body)) | |
| 55 | ||
| 56 | (defun org-babel-execute:abc (body params) | |
| 57 | "Execute a block of ABC code with org-babel. This function is | |
| 58 | called by `org-babel-execute-src-block'" | |
| 59 | (message "executing Abc source code block") | |
| 60 | (let* ((cmdline (cdr (assq :cmdline params))) | |
| 61 | (out-file (let ((file (cdr (assq :file params)))) | |
| 62 | (if file (replace-regexp-in-string "\.pdf$" ".ps" file) | |
| 63 | (error "abc code block requires :file header argument")))) | |
| 64 | (in-file (org-babel-temp-file "abc-")) | |
| 65 | (render (concat "abcm2ps" " " cmdline | |
| 66 | " -O " (org-babel-process-file-name out-file) | |
| 67 | " " (org-babel-process-file-name in-file)))) | |
| 68 | (with-temp-file in-file (insert (org-babel-expand-body:abc body params))) | |
| 69 | (org-babel-eval render "") | |
| 70 | ;;; handle where abcm2ps changes the file name (to support multiple files | |
| 71 | (when (or (string= (file-name-extension out-file) "eps") | |
| 72 | (string= (file-name-extension out-file) "svg")) | |
| 73 | (rename-file (concat | |
| 74 | (file-name-sans-extension out-file) "001." | |
| 75 | (file-name-extension out-file)) | |
| 76 | out-file t)) | |
| 77 | ;;; if we were asked for a pdf... | |
| 78 | (when (string= (file-name-extension (cdr (assq :file params))) "pdf") | |
| 79 | (org-babel-eval (concat "ps2pdf" " " out-file " " (cdr (assq :file params))) "")) | |
| 80 | ;;; indicate that the file has been written | |
| 81 | nil)) | |
| 82 | ||
| 83 | ;; This function should be used to assign any variables in params in | |
| 84 | ;; the context of the session environment. | |
| 85 | (defun org-babel-prep-session:abc (_session _params) | |
| 86 | "Return an error because abc does not support sessions." | |
| 87 | (error "ABC does not support sessions")) | |
| 88 | ||
| 89 | (provide 'ob-abc) | |
| 90 | ;;; ob-abc.el ends here | |
