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109 lines
3.8 KiB
EmacsLisp
109 lines
3.8 KiB
EmacsLisp
;;; ob-table.el --- support for calling org-babel functions from tables
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;; Copyright (C) 2009, 2010 Free Software Foundation, Inc.
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;; Author: Eric Schulte
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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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;; Should allow calling functions from org-mode tables using the
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;; function `sbe' as so...
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;; #+begin_src emacs-lisp :results silent
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;; (defun fibbd (n) (if (< n 2) 1 (+ (fibbd (- n 1)) (fibbd (- n 2)))))
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;; #+end_src
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;; #+srcname: fibbd
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;; #+begin_src emacs-lisp :var n=2 :results silent
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;; (fibbd n)
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;; #+end_src
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;; | original | fibbd |
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;; |----------+--------|
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;; | 0 | |
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;; | 1 | |
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;; | 2 | |
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;; | 3 | |
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;; | 4 | |
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;; | 5 | |
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;; | 6 | |
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;; | 7 | |
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;; | 8 | |
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;; | 9 | |
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;; #+TBLFM: $2='(sbe 'fibbd (n $1))
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;;; Code:
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(require 'ob)
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(defun org-babel-table-truncate-at-newline (string)
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"If STRING ends in a newline character, then remove the newline
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character and replace it with ellipses."
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(if (and (stringp string) (string-match "[\n\r]" string))
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(concat (substring string 0 (match-beginning 0)) "...")
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string))
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(defmacro sbe (source-block &rest variables)
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"Return the results of calling SOURCE-BLOCK assigning every
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variable in VARIABLES. Each element of VARIABLES should be a two
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element list, whose first element is the name of the variable and
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second element is a string of its value. The following call to
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`sbe' would be equivalent to the following source code block.
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(sbe 'source-block (n $2) (m 3))
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#+begin_src emacs-lisp :var results=source-block(n=val_at_col_2, m=3) :results silent
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results
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#+end_src
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NOTE: by default string variable names are interpreted as
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references to source-code blocks, to force interpretation of a
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cell's value as a string, prefix the identifier with two \"$\"s
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rather than a single \"$\" (i.e. \"$$2\" instead of \"$2\" in the
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example above."
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(let ((variables (mapcar
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(lambda (var)
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(if (and (= 3 (length var)) (eq (nth 1 var) '$))
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(list (car var) (format "\"%s\"" (last var)))
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var))
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variables)))
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(unless (stringp source-block) (setq source-block (symbol-name source-block)))
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(org-babel-table-truncate-at-newline ;; org-table cells can't be multi-line
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(if (and source-block (> (length source-block) 0))
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(let ((params
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(eval `(org-babel-parse-header-arguments
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(concat ":var results="
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,source-block
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"("
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(mapconcat (lambda (var-spec)
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(format "%S=%s" (nth 0 var-spec) (nth 1 var-spec)))
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',variables ", ")
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")")))))
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(org-babel-execute-src-block
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nil (list "emacs-lisp" "results"
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(org-babel-merge-params '((:results . "silent")) params))))
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""))))
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(provide 'ob-table)
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;; arch-tag: 4234cc7c-4fc8-4e92-abb0-2892de1a493b
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;;; ob-table.el ends here
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