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293 lines
10 KiB
EmacsLisp
293 lines
10 KiB
EmacsLisp
;;; ob-exp.el --- Exportation of org-babel source blocks
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;; Copyright (C) 2009, 2010 Free Software Foundation, Inc.
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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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;; This file is part of GNU Emacs.
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;; GNU Emacs 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 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs 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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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; See the online documentation for more information
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;;
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;; http://orgmode.org/worg/org-contrib/babel/
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;;; Code:
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(require 'ob)
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(require 'org-exp-blocks)
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(eval-when-compile
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(require 'cl))
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(defvar obe-marker nil)
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(defvar org-current-export-file)
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(defvar org-babel-lob-one-liner-regexp)
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(defvar org-babel-ref-split-regexp)
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(declare-function org-babel-lob-get-info "ob-lob" ())
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(declare-function org-babel-ref-literal "ob-ref" (ref))
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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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(add-hook 'org-export-blocks-postblock-hook 'org-exp-res/src-name-cleanup)
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(org-export-blocks-add-block '(src org-babel-exp-src-blocks nil))
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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 source name
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line. A source block is considered to be a source block function
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if the source name is present and is followed by a parenthesized
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argument list. The parentheses may be empty or contain
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whitespace. An example is the following which generates n random
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(uniform) numbers.
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#+source: 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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(save-excursion
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(goto-char (match-beginning 0))
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(let* ((info (org-babel-get-src-block-info))
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(params (nth 2 info)))
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;; expand noweb references in the original file
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(setf (nth 1 info)
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(if (and (cdr (assoc :noweb params))
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(string= "yes" (cdr (assoc :noweb params))))
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(org-babel-expand-noweb-references
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info (get-file-buffer org-current-export-file))
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(nth 1 info)))
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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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(params (nth 2 info))
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(replacement
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(save-match-data
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(if (org-babel-in-example-or-verbatim)
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(buffer-substring (match-beginning 0) (match-end 0))
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;; expand noweb references in the original file
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(setf (nth 1 info)
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(if (and (cdr (assoc :noweb params))
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(string= "yes" (cdr (assoc :noweb params))))
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(org-babel-expand-noweb-references
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info (get-file-buffer org-current-export-file))
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(nth 1 info)))
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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-exp-res/src-name-cleanup ()
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"Cleanup leftover #+results and #+srcname lines as part of the
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org export cycle. This should only be called after all block
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processing has taken place."
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(interactive)
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(save-excursion
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(goto-char (point-min))
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(while (org-re-search-forward-unprotected
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(concat
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"\\("org-babel-source-name-regexp"\\|"org-babel-result-regexp"\\)")
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nil t)
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(delete-region
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(progn (beginning-of-line) (point))
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(progn (end-of-line) (+ 1 (point)))))))
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(defun org-babel-in-example-or-verbatim ()
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"Return true if the point is currently in an escaped portion of
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an org-mode buffer code which should be treated as normal
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org-mode text."
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(or (org-in-indented-comment-line)
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(save-excursion
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(save-match-data
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(goto-char (point-at-bol))
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(looking-at "[ \t]*:[ \t]")))
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(org-in-regexps-block-p "^[ \t]*#\\+begin_src" "^[ \t]*#\\+end_src")))
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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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(let ((lob-info (org-babel-lob-get-info)))
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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
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(butlast lob-info) " ")))))
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(car (last lob-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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"Return a string containing the exported content of the current
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code block respecting the value of the :exports header argument."
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(flet ((silently () (let ((session (cdr (assoc :session (nth 2 info)))))
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(when (and session
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(not (equal "none" session))
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(not (assoc :noeval (nth 2 info))))
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(org-babel-exp-results info type 'silent))))
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(clean () (org-babel-remove-result info)))
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(case (intern (or (cdr (assoc :exports (nth 2 info))) "code"))
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('none (silently) (clean) "")
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('code (silently) (clean) (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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(defvar backend)
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(defun org-babel-exp-code (info type)
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"Return the code the current code block in a manner suitable
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for exportation by org-mode. This function is called by
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`org-babel-exp-do-export'. The code block will not be
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evaluated."
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(let ((lang (nth 0 info))
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(body (nth 1 info))
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(switches (nth 3 info))
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(name (nth 4 info))
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(args (mapcar
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#'cdr
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(org-remove-if-not (lambda (el) (eq :var (car el))) (nth 2 info)))))
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(case type
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('inline (format "=%s=" body))
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('block
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(let ((str
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(format "#+BEGIN_SRC %s %s\n%s%s#+END_SRC\n" lang switches body
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(if (and body (string-match "\n$" body))
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"" "\n"))))
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(when name
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(add-text-properties
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0 (length str)
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(list 'org-caption
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(format "%s(%s)"
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name
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(mapconcat #'identity args ", ")))
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str))
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str))
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('lob
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(let ((call-line (and (string-match "results=" (car args))
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(substring (car args) (match-end 0)))))
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(cond
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((eq backend 'html)
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(format "\n#+HTML: <label class=\"org-src-name\">%s</label>\n"
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call-line))
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((format ": %s\n" call-line))))))))
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(defun org-babel-exp-results (info type &optional silent)
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"Return the results of the current code block in a manner
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suitable for exportation by org-mode. This function is called by
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`org-babel-exp-do-export'. The code block will be evaluated.
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Optional argument SILENT can be used to inhibit insertion of
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results into the buffer."
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(let ((lang (nth 0 info))
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(body (nth 1 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
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(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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(equal :ob-must-be-reference
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(org-babel-ref-literal (match-string 2 (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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(nth 2 info))))
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;; skip code blocks which we can't evaluate
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(when (fboundp (intern (concat "org-babel-execute:" lang)))
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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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(unless silent
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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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(format "%s" 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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(org-babel-execute-src-block
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nil info (org-babel-merge-params
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params `((:results . ,(if silent "silent" "replace")))))
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"")
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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 info (org-babel-merge-params
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params `((:results . ,(if silent "silent" "replace")))))
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""))))))
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(provide 'ob-exp)
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;; arch-tag: 523abf4c-76d1-44ed-9f27-e3bddf34bf0f
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;;; ob-exp.el ends here
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