org-mode/litorgy/litorgy-script.el

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;;; litorgy-script.el --- litorgy functions for scripting languages
;; Copyright (C) 2009 Eric Schulte
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research
;; Homepage: http://orgmode.org
;; Version: 0.01
;;; License:
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; Litorgy support for evaluating ruby, and python source code.
;;; Code:
(require 'litorgy)
(defun litorgy-script-add-interpreter (var cmds)
(set-default var cmds)
(mapc (lambda (cmd)
(setq litorgy-interpreters (cons cmd litorgy-interpreters))
(eval
`(defun ,(intern (concat "litorgy-execute:" cmd)) (body params)
,(concat "Evaluate a block of " cmd " script with litorgy. This function is
called by `litorgy-execute-src-block'. This function is an
automatically generated wrapper for `litorgy-script-execute'.")
(litorgy-script-execute ,cmd body params))))
cmds))
(defvar litorgy-script-ruby-wrapper-method
"
def main
%s
end
results = main()
puts (results.class == String) ? results : results.inspect
")
(defvar litorgy-script-python-wrapper-method
"
def main():
%s
print main()")
(defcustom litorgy-script-interpreters '("ruby" "python")
"List of interpreters of scripting languages which can be
executed through litorgy."
:group 'litorgy
:set 'litorgy-script-add-interpreter)
(defun litorgy-script-execute (cmd body params)
"Run CMD on BODY obeying any options set with PARAMS."
(message (format "executing %s code block..." cmd))
(let ((vars (litorgy-ref-variables params)))
(save-window-excursion
(with-temp-buffer
(insert
(format
(case (intern cmd)
('ruby litorgy-script-ruby-wrapper-method)
('python litorgy-script-python-wrapper-method))
(concat
(mapconcat ;; define any variables
(lambda (pair)
(format "\t%s=%s"
(car pair)
(litorgy-script-var-to-ruby/python (cdr pair))))
vars "\n")
"\n"
(let ((body-lines (split-string body "[\n\r]+" t)))
(mapconcat
(lambda (line)
(format "\t%s\n" line))
(butlast body-lines) "\n")
(format "\treturn %s\n" (car (last body-lines)))))))
;; (message (buffer-substring (point-min) (point-max))) ;; debug script
(shell-command-on-region (point-min) (point-max) cmd nil 'replace)
;; (message (format "shell output = %s" (buffer-string))) ;; debug results
(litorgy-script-table-or-results (buffer-string))))))
(defun litorgy-script-var-to-ruby/python (var)
"Convert an elisp var into a string of ruby or python source
code specifying a var of the same value."
(if (listp var)
(concat "[" (mapconcat #'litorgy-script-var-to-ruby/python var ", ") "]")
(format "%S" var)))
(defun litorgy-script-table-or-results (results)
"If the results look like a table, then convert them into an
Emacs-lisp table, otherwise return the results as a string."
(setq results (litorgy-chomp results))
(litorgy-read
(if (string-match "^\\[.+\\]$" results)
;; somewhat hacky, but thanks to similarities between languages
;; it seems to work
(litorgy-read
(replace-regexp-in-string
"\\[" "(" (replace-regexp-in-string
"\\]" ")" (replace-regexp-in-string
", " " " (replace-regexp-in-string
"'" "\"" results)))))
(litorgy-chomp results))))
(provide 'litorgy-script)
;;; litorgy-script.el ends here