adding ob-lilypond to contrib/babel/langs/
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Eric Schulte
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;;; ob-lilypond.el --- org-babel functions for lilypond evaluation
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;; Copyright (C) Shelagh Manton, Martyn Jago
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;; Authors: Shelagh Manton, Martyn Jago
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;; Keywords: literate programming, weaving markup
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;; Homepage: https://github.com/sshelagh/ob-lilypond
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;; Version: 0.1
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;;; License:
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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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;;; Commentary:
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;; see http://github.com/mjago/ob-lilypond
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;;; Requirements:
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;; You need to have a copy of LilyPond
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(require 'ob)
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(require 'ob-eval)
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(defalias 'lilypond-mode 'LilyPond-mode)
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(add-to-list 'org-babel-tangle-lang-exts '("LilyPond" . "ly"))
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(defconst ly-version "0.1"
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"The version number of the file ob-lilypond.el.")
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(defvar ly-compile-post-tangle t
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"Following the org-babel-tangle (C-c C-v t) command,
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ly-compile-post-tangle determines whether ob-lilypond should
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automatically attempt to compile the resultant tangled file.
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If the value is nil, no automated compilation takes place.
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Default value is t")
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(defvar ly-display-pdf-post-tangle t
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"Following a successful LilyPond compilation
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ly-display-pdf-post-tangle determines whether to automate the
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drawing / redrawing of the resultant pdf. If the value is nil,
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the pdf is not automatically redrawn. Default value is t")
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(defvar ly-play-midi-post-tangle t
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"Following a successful LilyPond compilation
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ly-play-midi-post-tangle determines whether to automate the
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playing of the resultant midi file. If the value is nil,
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the midi file is not automatically played. Default value is t")
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(defvar ly-OSX-ly-path
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"/Applications/lilypond.app/Contents/Resources/bin/lilypond")
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(defvar ly-OSX-pdf-path "open")
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(defvar ly-OSX-midi-path "open")
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(defvar ly-nix-ly-path "/usr/bin/lilypond")
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(defvar ly-nix-pdf-path "evince")
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(defvar ly-nix-midi-path "timidity")
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(defvar ly-win32-ly-path "lilypond")
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(defvar ly-win32-pdf-path "")
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(defvar ly-win32-midi-path "")
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(defvar ly-gen-png nil
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"Image generation (png) can be turned on by default by setting
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LY-GEN-PNG to t")
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(defvar ly-gen-svg nil
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"Image generation (SVG) can be turned on by default by setting
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LY-GEN-SVG to t")
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(defvar ly-gen-html nil
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"HTML generation can be turned on by default by setting
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LY-GEN-HTML to t")
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(defvar ly-use-eps nil
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"You can force the compiler to use the EPS backend by setting
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LY-USE-EPS to t")
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(defvar org-babel-default-header-args:lilypond
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'((:tangle . "yes") (:noweb . "yes") (:results . "silent") (:comments . "yes"))
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"Default arguments to use when evaluating a lilypond source block.")
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(defun org-babel-expand-body:lilypond (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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(defun org-babel-execute:lilypond (body params)
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"This function is called by `org-babel-execute-src-block'.
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tTangle all lilypond blocks and process the result"
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(ly-tangle))
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(defun ly-tangle ()
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"ob-lilypond specific tangle, attempts to invoke
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=ly-execute-tangled-ly= if tangle is successful. Also passes
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specific arguments to =org-babel-tangle="
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(interactive)
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(if (org-babel-tangle nil "yes" "lilypond")
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(ly-execute-tangled-ly) nil))
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(defun org-babel-prep-session:lilypond (session params)
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"Return an error because LilyPond exporter does not support sessions."
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(error "Sorry, LilyPond does not currently support sessions!"))
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(defun ly-execute-tangled-ly ()
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"Compile result of block tangle with lilypond.
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If error in compilation, attempt to mark the error in lilypond org file"
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(when ly-compile-post-tangle
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(let ((ly-tangled-file (ly-switch-extension
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(buffer-file-name) ".lilypond"))
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(ly-temp-file (ly-switch-extension
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(buffer-file-name) ".ly")))
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(if (file-exists-p ly-tangled-file)
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(progn
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(when (file-exists-p ly-temp-file)
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(delete-file ly-temp-file))
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(rename-file ly-tangled-file
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ly-temp-file))
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(error "Error: Tangle Failed!") t)
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(switch-to-buffer-other-window "*lilypond*")
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(erase-buffer)
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(ly-compile-lilyfile ly-temp-file)
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(goto-char (point-min))
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(if (not (ly-check-for-compile-error ly-temp-file))
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(progn
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(other-window -1)
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(ly-attempt-to-open-pdf ly-temp-file)
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(ly-attempt-to-play-midi ly-temp-file))
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(error "Error in Compilation!")))) nil)
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(defun ly-compile-lilyfile (file-name &optional test)
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"Compile lilypond file and check for compile errors
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FILE-NAME is full path to lilypond (.ly) file"
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(message "Compiling LilyPond...")
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(let ((arg-1 (ly-determine-ly-path)) ;program
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(arg-2 nil) ;infile
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(arg-3 "*lilypond*") ;buffer
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(arg-4 t) ;display
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(arg-5 (if ly-gen-png "--png" "")) ;&rest...
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(arg-6 (if ly-gen-html "--html" ""))
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(arg-7 (if ly-use-eps "-dbackend=eps" ""))
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(arg-8 (if ly-gen-svg "-dbackend=svg" ""))
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(arg-9 (concat "--output=" (file-name-sans-extension file-name)))
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(arg-10 file-name))
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(if test
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`(,arg-1 ,arg-2 ,arg-3 ,arg-4 ,arg-5
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,arg-6 ,arg-7 ,arg-8 ,arg-9 ,arg-10)
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(call-process
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arg-1 arg-2 arg-3 arg-4 arg-5
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arg-6 arg-7 arg-8 arg-9 arg-10))))
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(defun ly-check-for-compile-error (file-name &optional test)
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"Check for compile error.
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This is performed by parsing the *lilypond* buffer
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containing the output message from the compilation.
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FILE-NAME is full path to lilypond file.
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If TEST is t just return nil if no error found, and pass
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nil as file-name since it is unused in this context"
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(let ((is-error (search-forward "error:" nil t)))
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(if (not test)
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(if (not is-error)
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nil
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(ly-process-compile-error file-name))
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is-error)))
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(defun ly-process-compile-error (file-name)
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"Process the compilation error that has occurred.
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FILE-NAME is full path to lilypond file"
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(let ((line-num (ly-parse-line-num)))
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(let ((error-lines (ly-parse-error-line file-name line-num)))
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(ly-mark-error-line file-name error-lines)
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(error "Error: Compilation Failed!"))))
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(defun ly-mark-error-line (file-name line)
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"Mark the erroneous lines in the lilypond org buffer.
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FILE-NAME is full path to lilypond file.
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LINE is the erroneous line"
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(switch-to-buffer-other-window
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(concat (file-name-nondirectory
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(ly-switch-extension file-name ".org"))))
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(let ((temp (point)))
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(goto-char (point-min))
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(setq case-fold-search nil)
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(if (search-forward line nil t)
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(progn
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(show-all)
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(set-mark (point))
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(goto-char (- (point) (length line))))
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(goto-char temp))))
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(defun ly-parse-line-num (&optional buffer)
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"Extract error line number."
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(when buffer
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(set-buffer buffer))
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(let ((start
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(and (search-backward ":" nil t)
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(search-backward ":" nil t)
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(search-backward ":" nil t)
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(search-backward ":" nil t)))
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(num nil))
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(if start
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(progn
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(forward-char)
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(let ((num (buffer-substring
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(+ 1 start)
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(- (search-forward ":" nil t) 1))))
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(setq num (string-to-number num))
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(if (numberp num)
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num
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nil)))
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nil)))
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(defun ly-parse-error-line (file-name lineNo)
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"Extract the erroneous line from the tangled .ly file
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FILE-NAME is full path to lilypond file.
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LINENO is the number of the erroneous line"
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(set-buffer (get-buffer-create "temp-buf"))
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(insert-file-contents (ly-switch-extension file-name ".ly")
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nil nil nil t)
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(if (> lineNo 0)
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(progn
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(goto-line lineNo)
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(buffer-substring (point) (point-at-eol)))
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nil))
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(defun ly-attempt-to-open-pdf (file-name &optional test)
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"Attempt to display the generated pdf file
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FILE-NAME is full path to lilypond file
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If TEST is non-nil, the shell command is returned and is not run"
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(when ly-display-pdf-post-tangle
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(let ((pdf-file (ly-switch-extension file-name ".pdf")))
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(if (file-exists-p pdf-file)
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(let ((cmd-string
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(concat (ly-determine-pdf-path) " " pdf-file)))
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(if test
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cmd-string
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(shell-command cmd-string)))
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(message "No pdf file generated so can't display!")))))
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(defun ly-attempt-to-play-midi (file-name &optional test)
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"Attempt to play the generated MIDI file
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FILE-NAME is full path to lilypond file
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If TEST is non-nil, the shell command is returned and is not run"
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(when ly-play-midi-post-tangle
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(let ((midi-file (ly-switch-extension file-name ".midi")))
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(if (file-exists-p midi-file)
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(let ((cmd-string
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(concat (ly-determine-midi-path) " " midi-file)))
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(if test
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cmd-string
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(shell-command cmd-string)))
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(message "No midi file generated so can't play!")))))
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(defun ly-determine-ly-path (&optional test)
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"Return correct path to ly binary depending on OS
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If TEST is non-nil, it contains a simulation of the OS for test purposes"
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(let ((sys-type
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(or test system-type)))
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(cond ((string= sys-type "darwin")
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ly-OSX-ly-path)
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((string= sys-type "win32")
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ly-win32-ly-path)
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(t ly-nix-ly-path))))
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(defun ly-determine-pdf-path (&optional test)
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"Return correct path to pdf viewer depending on OS
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If TEST is non-nil, it contains a simulation of the OS for test purposes"
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(let ((sys-type
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(or test system-type)))
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(cond ((string= sys-type "darwin")
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ly-OSX-pdf-path)
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((string= sys-type "win32")
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ly-win32-pdf-path)
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(t ly-nix-pdf-path))))
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(defun ly-determine-midi-path (&optional test)
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"Return correct path to midi player depending on OS
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If TEST is non-nil, it contains a simulation of the OS for test purposes"
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(let ((sys-type
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(or test test system-type)))
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(cond ((string= sys-type "darwin")
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ly-OSX-midi-path)
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((string= sys-type "win32")
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ly-win32-midi-path)
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(t ly-nix-midi-path))))
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(defun ly-toggle-midi-play ()
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"Toggle whether midi will be played following a successful compilation"
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(interactive)
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(setq ly-play-midi-post-tangle
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(not ly-play-midi-post-tangle))
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(message (concat "Post-Tangle MIDI play has been "
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(if ly-play-midi-post-tangle
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"ENABLED." "DISABLED."))))
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(defun ly-toggle-pdf-display ()
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"Toggle whether pdf will be displayed following a successful compilation"
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(interactive)
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(setq ly-display-pdf-post-tangle
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(not ly-display-pdf-post-tangle))
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(message (concat "Post-Tangle PDF display has been "
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(if ly-display-pdf-post-tangle
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"ENABLED." "DISABLED."))))
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(defun ly-toggle-png-generation ()
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"Toggle whether png image will be generated by compilation"
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(interactive)
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(setq ly-gen-png
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(not ly-gen-png))
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(message (concat "PNG image generation has been "
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(if ly-gen-png "ENABLED." "DISABLED."))))
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(defun ly-toggle-html-generation ()
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"Toggle whether html will be generated by compilation"
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(interactive)
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(setq ly-gen-html
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(not ly-gen-html))
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(message (concat "HTML generation has been "
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(if ly-gen-html "ENABLED." "DISABLED."))))
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(defun ly-version (&optional insert-at-point)
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(interactive)
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(setq version (format "ob-lilypond version %s" ly-version))
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(when insert-at-point (insert version))
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(message version))
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(defun ly-switch-extension (file-name ext)
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"Utility command to swap current FILE-NAME extension with EXT"
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(concat (file-name-sans-extension
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file-name) ext))
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(provide 'ob-lilypond)
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;;; ob-lilypond.el ends here
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