415 lines
16 KiB
EmacsLisp
415 lines
16 KiB
EmacsLisp
;;; ob-exp.el --- Exportation of org-babel source blocks
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;; Copyright (C) 2009-2012 Free Software Foundation, Inc.
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;; Authors: Eric Schulte
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;; Dan Davison
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;; Keywords: literate programming, reproducible research
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;; Homepage: http://orgmode.org
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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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;;; Code:
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(require 'ob)
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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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(defvar org-list-forbidden-blocks)
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(declare-function org-babel-lob-get-info "ob-lob" ())
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(declare-function org-babel-eval-wipe-error-buffer "ob-eval" ())
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(declare-function org-between-regexps-p "org"
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(start-re end-re &optional lim-up lim-down))
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(declare-function org-get-indentation "org" (&optional line))
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(declare-function org-heading-components "org" ())
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(declare-function org-in-block-p "org" (names))
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(declare-function org-in-verbatim-emphasis "org" ())
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(declare-function org-link-search "org" (s &optional type avoid-pos stealth))
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(declare-function org-fill-template "org" (template alist))
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(declare-function org-split-string "org" (string &optional separators))
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(declare-function org-element-at-point "org-element" (&optional keep-trail))
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(declare-function org-element-context "org-element" ())
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(declare-function org-element-property "org-element" (property element))
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(declare-function org-element-type "org-element" (element))
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(defcustom org-export-babel-evaluate t
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"Switch controlling code evaluation during export.
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When set to nil no code will be evaluated as part of the export
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process."
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:group 'org-babel
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:version "24.1"
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:type 'boolean)
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(put 'org-export-babel-evaluate 'safe-local-variable (lambda (x) (eq x nil)))
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(defun org-babel-exp-get-export-buffer ()
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"Return the current export buffer if possible."
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(cond
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((bufferp org-current-export-file) org-current-export-file)
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(org-current-export-file (get-file-buffer org-current-export-file))
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('otherwise
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(error "Requested export buffer when `org-current-export-file' is nil"))))
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(defmacro org-babel-exp-in-export-file (lang &rest body)
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(declare (indent 1))
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`(let* ((lang-headers (intern (concat "org-babel-default-header-args:" ,lang)))
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(heading (nth 4 (ignore-errors (org-heading-components))))
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(export-buffer (current-buffer))
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(original-buffer (org-babel-exp-get-export-buffer)) results)
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(when original-buffer
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;; resolve parameters in the original file so that
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;; headline and file-wide parameters are included, attempt
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;; to go to the same heading in the original file
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(set-buffer original-buffer)
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(save-restriction
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(when heading
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(condition-case nil
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(let ((org-link-search-inhibit-query t))
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(org-link-search heading))
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(error (when heading
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(goto-char (point-min))
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(re-search-forward (regexp-quote heading) nil t)))))
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(setq results ,@body))
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(set-buffer export-buffer)
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results)))
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(def-edebug-spec org-babel-exp-in-export-file (form body))
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(defun org-babel-exp-src-block (&rest headers)
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"Process source block for export.
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Depending on the 'export' headers argument in replace the source
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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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Assume point is at the beginning of block's starting line."
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(interactive)
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(unless noninteractive (message "org-babel-exp processing..."))
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(save-excursion
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(let* ((info (org-babel-get-src-block-info 'light))
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(lang (nth 0 info))
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(raw-params (nth 2 info)) hash)
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;; bail if we couldn't get any info from the block
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(when info
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;; if we're actually going to need the parameters
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(when (member (cdr (assoc :exports (nth 2 info))) '("both" "results"))
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(org-babel-exp-in-export-file lang
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(setf (nth 2 info)
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(org-babel-process-params
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(org-babel-merge-params
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org-babel-default-header-args
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(org-babel-params-from-properties lang)
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(if (boundp lang-headers) (eval lang-headers) nil)
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raw-params))))
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(setf hash (org-babel-sha1-hash info)))
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(org-babel-exp-do-export info 'block hash)))))
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(defcustom org-babel-exp-call-line-template
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""
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"Template used to export call lines.
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This template may be customized to include the call line name
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with any export markup. The template is filled out using
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`org-fill-template', and the following %keys may be used.
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line --- call line
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An example value would be \"\\n: call: %line\" to export the call line
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wrapped in a verbatim environment.
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Note: the results are inserted separately after the contents of
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this template."
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:group 'org-babel
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:type 'string)
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(defvar org-babel-default-lob-header-args)
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(defun org-babel-exp-non-block-elements (start end)
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"Process inline source and call lines between START and END for export."
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(interactive)
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(save-excursion
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(goto-char start)
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(unless (markerp end)
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(let ((m (make-marker)))
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(set-marker m end (current-buffer))
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(setq end m)))
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(let ((rx (concat "\\(?:" org-babel-inline-src-block-regexp
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"\\|" org-babel-lob-one-liner-regexp "\\)")))
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(while (re-search-forward rx end t)
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(save-excursion
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(let* ((element (save-match-data (org-element-context)))
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(type (org-element-type element)))
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(when (memq type '(babel-call inline-babel-call inline-src-block))
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(let ((beg-el (org-element-property :begin element))
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(end-el (org-element-property :end element)))
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(case type
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(inline-src-block
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(let* ((info (org-babel-parse-inline-src-block-match))
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(params (nth 2 info)))
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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 (org-babel-exp-get-export-buffer))
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(nth 1 info)))
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(goto-char beg-el)
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(let ((replacement (org-babel-exp-do-export info 'inline)))
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(if (equal replacement "")
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;; Replacement code is empty: completely
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;; remove inline src block, including extra
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;; white space that might have been created
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;; when inserting results.
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(delete-region beg-el
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(progn (goto-char end-el)
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(skip-chars-forward " \t")
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(point)))
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;; Otherwise: remove inline src block but
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;; preserve following white spaces. Then
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;; insert value.
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(delete-region beg-el
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(progn (goto-char end-el)
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(skip-chars-backward " \t")
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(point)))
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(insert replacement)))))
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((babel-call inline-babel-call)
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(let* ((lob-info (org-babel-lob-get-info))
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(results
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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-default-lob-header-args
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(org-babel-params-from-properties)
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(org-babel-parse-header-arguments
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(org-no-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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" ")))))
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"" nil (car (last lob-info)))
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'lob))
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(rep (org-fill-template
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org-babel-exp-call-line-template
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`(("line" . ,(nth 0 lob-info))))))
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;; If replacement is empty, completely remove the
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;; object/element, including any extra white space
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;; that might have been created when including
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;; results.
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(if (equal rep "")
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(delete-region
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beg-el
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(progn (goto-char end-el)
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(if (not (eq type 'babel-call))
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(progn (skip-chars-forward " \t") (point))
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(skip-chars-forward " \r\t\n")
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(line-beginning-position))))
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;; Otherwise, preserve following white
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;; spaces/newlines and then, insert replacement
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;; string.
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(goto-char beg-el)
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(delete-region beg-el
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(progn (goto-char end-el)
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(skip-chars-backward " \r\t\n")
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(point)))
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(insert rep)))))))))))))
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(defvar org-src-preserve-indentation) ; From org-src.el
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(defun org-export-blocks-preprocess ()
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"Execute all blocks in visible part of buffer."
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(interactive)
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(save-window-excursion
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(let ((case-fold-search t)
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(pos (point-min)))
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(goto-char pos)
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(while (re-search-forward "^[ \t]*#\\+BEGIN_SRC" nil t)
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(let ((element (save-match-data (org-element-at-point))))
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(when (eq (org-element-type element) 'src-block)
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(let* ((match-start (copy-marker (match-beginning 0)))
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(begin (copy-marker (org-element-property :begin element)))
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;; Make sure we don't remove any blank lines after
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;; the block when replacing it.
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(block-end (save-excursion
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(goto-char (org-element-property :end element))
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(skip-chars-backward " \r\t\n")
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(copy-marker (line-end-position))))
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(ind (org-get-indentation))
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(headers
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(cons
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(org-element-property :language element)
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(let ((params (org-element-property :parameters element)))
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(and params (org-split-string params "[ \t]+")))))
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(preserve-indent
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(or org-src-preserve-indentation
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(org-element-property :preserve-indent element))))
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;; Execute all non-block elements between POS and
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;; current block.
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(org-babel-exp-non-block-elements pos begin)
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;; Take care of matched block: compute replacement
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;; string. In particular, a nil REPLACEMENT means the
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;; block should be left as-is while an empty string
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;; should remove the block.
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(let ((replacement (progn (goto-char match-start)
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(org-babel-exp-src-block headers))))
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(cond ((not replacement) (goto-char block-end))
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((equal replacement "")
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(delete-region begin
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(progn (goto-char block-end)
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(skip-chars-forward " \r\t\n")
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(if (eobp) (point)
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(line-beginning-position)))))
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(t
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(goto-char match-start)
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(delete-region (point) block-end)
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(insert replacement)
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(if preserve-indent
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;; Indent only the code block markers.
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(save-excursion (skip-chars-backward " \r\t\n")
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(indent-line-to ind)
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(goto-char match-start)
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(indent-line-to ind))
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;; Indent everything.
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(indent-code-rigidly match-start (point) ind)))))
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(setq pos (point))
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;; Cleanup markers.
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(set-marker match-start nil)
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(set-marker begin nil)
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(set-marker block-end nil)))))
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;; Eventually execute all non-block Babel elements between last
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;; src-block and end of buffer.
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(org-babel-exp-non-block-elements pos (point-max)))))
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(defun org-babel-in-example-or-verbatim ()
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"Return true if point is in example or verbatim code.
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Example and verbatim code include escaped portions of
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an org-mode buffer code that should be treated as normal
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org-mode text."
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(or (save-match-data
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(save-excursion
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(goto-char (point-at-bol))
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(looking-at "[ \t]*:[ \t]")))
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(org-in-verbatim-emphasis)
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(org-in-block-p org-list-forbidden-blocks)
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(org-between-regexps-p "^[ \t]*#\\+begin_src" "^[ \t]*#\\+end_src")))
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(defun org-babel-exp-do-export (info type &optional hash)
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"Return a string with the exported content of a code block.
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The function respects the value of the :exports header argument."
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(let ((silently (lambda () (let ((session (cdr (assoc :session (nth 2 info)))))
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(when (not (and session (equal "none" session)))
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(org-babel-exp-results info type 'silent)))))
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(clean (lambda () (unless (eq type 'inline) (org-babel-remove-result info)))))
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(case (intern (or (cdr (assoc :exports (nth 2 info))) "code"))
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('none (funcall silently) (funcall clean) "")
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('code (funcall silently) (funcall clean) (org-babel-exp-code info))
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('results (org-babel-exp-results info type nil hash) "")
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('both (org-babel-exp-results info type nil hash)
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(org-babel-exp-code info)))))
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(defcustom org-babel-exp-code-template
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"#+BEGIN_SRC %lang%flags\n%body\n#+END_SRC"
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"Template used to export the body of code blocks.
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This template may be customized to include additional information
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such as the code block name, or the values of particular header
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arguments. The template is filled out using `org-fill-template',
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and the following %keys may be used.
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lang ------ the language of the code block
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name ------ the name of the code block
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body ------ the body of the code block
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flags ----- the flags passed to the code block
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In addition to the keys mentioned above, every header argument
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defined for the code block may be used as a key and will be
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replaced with its value."
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:group 'org-babel
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:type 'string)
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(defun org-babel-exp-code (info)
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"Return the original code block formatted for export."
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(setf (nth 1 info)
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(if (string= "strip-export" (cdr (assoc :noweb (nth 2 info))))
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(replace-regexp-in-string
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(org-babel-noweb-wrap) "" (nth 1 info))
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(if (org-babel-noweb-p (nth 2 info) :export)
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(org-babel-expand-noweb-references
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info (org-babel-exp-get-export-buffer))
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(nth 1 info))))
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(org-fill-template
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org-babel-exp-code-template
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`(("lang" . ,(nth 0 info))
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("body" . ,(nth 1 info))
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,@(mapcar (lambda (pair)
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(cons (substring (symbol-name (car pair)) 1)
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(format "%S" (cdr pair))))
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(nth 2 info))
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("flags" . ,((lambda (f) (when f (concat " " f))) (nth 3 info)))
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("name" . ,(or (nth 4 info) "")))))
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(defun org-babel-exp-results (info type &optional silent hash)
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"Evaluate and return the results of the current code block for export.
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Results are prepared in a manner suitable for export by org-mode.
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This function is called by `org-babel-exp-do-export'. The code
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block will be evaluated. Optional argument SILENT can be used to
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inhibit insertion of results into the buffer."
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(when (and org-export-babel-evaluate
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(not (and hash (equal hash (org-babel-current-result-hash)))))
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(let ((lang (nth 0 info))
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(body (if (org-babel-noweb-p (nth 2 info) :eval)
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(org-babel-expand-noweb-references
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info (org-babel-exp-get-export-buffer))
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(nth 1 info)))
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(info (copy-sequence 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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(org-babel-eval-wipe-error-buffer)
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(prog1 nil
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(setf (nth 1 info) body)
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(setf (nth 2 info)
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(org-babel-exp-in-export-file lang
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(org-babel-process-params
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(org-babel-merge-params
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(nth 2 info)
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`((:results . ,(if silent "silent" "replace")))))))
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(cond
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((equal type 'block)
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(org-babel-execute-src-block nil info))
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((equal type 'inline)
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;; position the point on the inline source block allowing
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;; `org-babel-insert-result' to check that the block is
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;; inline
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(re-search-backward "[ \f\t\n\r\v]" nil t)
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(re-search-forward org-babel-inline-src-block-regexp nil t)
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(re-search-backward "src_" nil t)
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(org-babel-execute-src-block nil info))
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((equal type '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 nil info)))))))))
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(provide 'ob-exp)
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;;; ob-exp.el ends here
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