203 lines
7.7 KiB
EmacsLisp
203 lines
7.7 KiB
EmacsLisp
;;; org-babel-exp.el --- Exportation of org-babel source blocks
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;; Copyright (C) 2009 Eric Schulte, Dan Davison
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;; Author: Eric Schulte, Dan Davison
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;; Keywords: literate programming, reproducible research
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;; Homepage: http://orgmode.org
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;; Version: 0.01
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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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;; for more information see the comments in org-babel.el
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;;; Code:
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(require 'org-babel)
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(require 'org-exp-blocks)
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(org-export-blocks-add-block '(src org-babel-exp-src-blocks nil))
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(add-to-list 'org-export-interblocks '(src org-babel-exp-inline-src-blocks))
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(add-to-list 'org-export-interblocks '(lob org-babel-exp-lob-one-liners))
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(defvar org-babel-function-def-export-keyword "function"
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"When exporting a source block function, this keyword will
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appear in the exported version in the place of #+srcname:. A
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source block is considered to be a source block function if the
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srcname is present and is followed by a parenthesised argument
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list. The parentheses may be empty or contain whitespace. An
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example is the following which generates n random
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(uniform) numbers.
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#+srcname: rand(n)
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#+begin_src R
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runif(n)
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#+end_src
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")
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(defvar org-babel-function-def-export-indent 4
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"When exporting a source block function, the block contents
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will be indented by this many characters. See
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`org-babel-function-def-export-name' for the definition of a
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source block function.")
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(defun org-babel-exp-src-blocks (body &rest headers)
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"Process src block for export. Depending on the 'export'
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headers argument in replace the source code block with...
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both ---- display the code and the results
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code ---- the default, display the code inside the block but do
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not process
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results - just like none only the block is run on export ensuring
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that it's results are present in the org-mode buffer
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none ----- do not display either code or results upon export"
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(interactive)
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(message "org-babel-exp processing...")
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(let ((info (save-excursion
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(if (re-search-backward org-babel-src-block-regexp nil t)
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(org-babel-get-src-block-info)
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(error "Failed to find src block.")))))
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(org-babel-exp-do-export info 'block)))
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(defun org-babel-exp-inline-src-blocks (start end)
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"Process inline src blocks between START and END for export.
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See `org-babel-exp-src-blocks' for export options, currently the
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options and are taken from `org-babel-defualt-inline-header-args'."
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(interactive)
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(save-excursion
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(goto-char start)
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(while (and (< (point) end)
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(re-search-forward org-babel-inline-src-block-regexp end t))
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(let* ((info (save-match-data (org-babel-parse-inline-src-block-match)))
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(replacement (save-match-data
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(org-babel-exp-do-export info 'inline))))
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(setq end (+ end (- (length replacement) (length (match-string 1)))))
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(replace-match replacement t t nil 1)))))
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(defun org-babel-exp-lob-one-liners (start end)
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"Process #+lob (Library of Babel) calls between START and END for export.
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See `org-babel-exp-src-blocks' for export options. Currently the
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options are taken from `org-babel-default-header-args'."
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(interactive)
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(let (replacement)
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(save-excursion
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(goto-char start)
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(while (and (< (point) end)
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(re-search-forward org-babel-lob-one-liner-regexp nil t))
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(setq replacement
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(save-match-data
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(org-babel-exp-do-export
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(list "emacs-lisp" "results"
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(org-babel-merge-params
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org-babel-default-header-args
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(org-babel-parse-header-arguments
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(org-babel-clean-text-properties
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(concat ":var results="
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(mapconcat #'identity (org-babel-lob-get-info) " "))))))
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'lob)))
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(setq end (+ end (- (length replacement) (length (match-string 0)))))
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(replace-match replacement t t)))))
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(defun org-babel-exp-do-export (info type)
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(case (intern (or (cdr (assoc :exports (third info))) "code"))
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('none "")
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('code (org-babel-exp-code info type))
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('results (org-babel-exp-results info type))
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('both (concat (org-babel-exp-code info type)
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"\n\n"
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(org-babel-exp-results info type)))))
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(defun org-babel-exp-code (info type)
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(let ((lang (first info))
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(body (second info))
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(switches (fourth info))
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(name (fifth info))
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(args (sixth info))
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(function-def-line ""))
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(case type
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('inline (format "=%s=" (second info)))
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('block
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(when args
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(unless (string-match "-i\\>" switches)
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(setq switches (concat switches " -i")))
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(setq body (with-temp-buffer
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(insert body)
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(indent-code-rigidly (point-min) (point-max) org-babel-function-def-export-indent)
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(buffer-string)))
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(setq args (mapconcat #'identity
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(delq nil (mapcar (lambda (el) (and (length (cdr el)) (cdr el))) args))
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", "))
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(setq function-def-line
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(format "#+BEGIN_SRC org-babel-lob\n%s %s(%s):\n#+END_SRC\n"
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org-babel-function-def-export-keyword name args)))
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(concat function-def-line
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(format "#+BEGIN_SRC %s %s\n%s%s#+END_SRC" lang switches body
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(if (string-match "\n$" body) "" "\n"))))
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('lob (save-excursion
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(re-search-backward org-babel-lob-one-liner-regexp)
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(format "#+BEGIN_SRC org-babel-lob\n%s\n#+END_SRC"
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(first (org-babel-lob-get-info))))))))
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(defun org-babel-exp-results (info type)
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(let ((lang (first info))
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(body (second info))
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(params
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;; lets ensure that we lookup references in the original file
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(mapcar (lambda (pair)
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(if (and org-current-export-file
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(eq (car pair) :var)
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(string-match org-babel-ref-split-regexp (cdr pair)))
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`(:var . ,(concat (match-string 1 (cdr pair))
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"=" org-current-export-file
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":" (match-string 2 (cdr pair))))
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pair))
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(third info))))
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(case type
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('inline
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(let ((raw (org-babel-execute-src-block
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nil info '((:results . "silent"))))
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(result-params (split-string (cdr (assoc :results params)))))
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(cond ;; respect the value of the :results header argument
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((member "file" result-params)
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(org-babel-result-to-file raw))
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((or (member "raw" result-params) (member "org" result-params))
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raw)
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((member "code" result-params)
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(format "src_%s{%s}" lang raw))
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(t
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(if (stringp raw)
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(if (= 0 (length raw)) "=(no results)="
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(format "=%s=" raw))
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(format "=%S=" raw))))))
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('block
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(save-excursion ;; org-exp-blocks places us at the end of the block
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(re-search-backward org-babel-src-block-regexp nil t)
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(org-babel-execute-src-block
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nil nil (org-babel-merge-params params '((:results . "replace")))) ""))
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('lob
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(save-excursion
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(re-search-backward org-babel-lob-one-liner-regexp nil t)
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(org-babel-execute-src-block
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nil (list lang body (org-babel-merge-params params '((:results . "replace"))))) "")))))
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(provide 'org-babel-exp)
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;;; org-babel-exp.el ends here
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