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d128662fa3
This proposal for code tidying uses multiple-value-bind to satisfy:
1. The various parsed/resolved components of the param list (session,
vars, result-type) are available in the org-babel-execute:LANG
functions.
2. Those functions don't duplicate the code for parsing the params
list and resolving references
3. The functions still have the params list available to them, should
they need to implement language-specific behaviour using it.
If the org-babel-execute:LANG functions need to be called directly,
then that would now have to be via
(multiple-value-bind (session vars result-params result-type)
(org-babel-process-params params) (funcall cmd body params))
as in org-babel-exp.el. (But is it actually necessary to by-pass
org-babel-execute-src-block?)
162 lines
6.3 KiB
EmacsLisp
162 lines
6.3 KiB
EmacsLisp
;;; org-babel-ruby.el --- org-babel functions for ruby evaluation
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;; Copyright (C) 2009 Eric Schulte
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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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;;; 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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;; Org-Babel support for evaluating ruby source code.
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;;; Code:
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(require 'org-babel)
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(require 'inf-ruby)
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(org-babel-add-interpreter "ruby")
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(add-to-list 'org-babel-tangle-langs '("ruby" "rb" "#!/usr/bin/env ruby"))
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(defun org-babel-execute:ruby (body params)
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"Execute a block of Ruby code with org-babel. This function is
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called by `org-babel-execute-src-block' via multiple-value-bind."
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(message "executing Ruby source code block")
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(let ((full-body (concat
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(mapconcat ;; define any variables
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(lambda (pair)
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(format "%s=%s"
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(car pair)
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(org-babel-ruby-var-to-ruby (cdr pair))))
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vars "\n") "\n" body "\n")) ;; then the source block body
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(session (org-babel-ruby-initiate-session session)))
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(org-babel-ruby-evaluate session full-body result-type)))
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(defun org-babel-prep-session:ruby (session params)
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"Prepare SESSION according to the header arguments specified in PARAMS."
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;; (message "params=%S" params) ;; debugging
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(let* ((session (org-babel-ruby-initiate-session session))
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(vars (org-babel-ref-variables params))
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(var-lines (mapcar ;; define any variables
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(lambda (pair)
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(format "%s=%s"
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(car pair)
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(org-babel-ruby-var-to-ruby (cdr pair))))
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vars)))
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;; (message "vars=%S" vars) ;; debugging
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(org-babel-comint-in-buffer session
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(sit-for .5) (goto-char (point-max))
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(mapc (lambda (var)
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(insert var) (comint-send-input nil t)
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(org-babel-comint-wait-for-output session)
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(sit-for .1) (goto-char (point-max))) var-lines))))
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;; helper functions
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(defun org-babel-ruby-var-to-ruby (var)
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"Convert an elisp var into a string of ruby source code
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specifying a var of the same value."
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(if (listp var)
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(concat "[" (mapconcat #'org-babel-ruby-var-to-ruby var ", ") "]")
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(format "%S" var)))
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(defun org-babel-ruby-table-or-string (results)
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"If the results look like a table, then convert them into an
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Emacs-lisp table, otherwise return the results as a string."
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(org-babel-read
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(if (and (stringp results) (string-match "^\\[.+\\]$" results))
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(org-babel-read
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(replace-regexp-in-string
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"\\[" "(" (replace-regexp-in-string
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"\\]" ")" (replace-regexp-in-string
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", " " " (replace-regexp-in-string
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"'" "\"" results)))))
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results)))
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(defun org-babel-ruby-initiate-session (&optional session)
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"If there is not a current inferior-process-buffer in SESSION
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then create. Return the initialized session."
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(unless (string= session "none")
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(let ((session-buffer (save-window-excursion (run-ruby nil session) (current-buffer))))
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(if (org-babel-comint-buffer-livep session-buffer)
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session-buffer
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(sit-for .5)
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(org-babel-ruby-initiate-session session)))))
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(defvar org-babel-ruby-last-value-eval "_"
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"When evaluated by Ruby this returns the return value of the last statement.")
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(defvar org-babel-ruby-eoe-indicator ":org_babel_ruby_eoe"
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"Used to indicate that evaluation is has completed.")
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(defvar org-babel-ruby-wrapper-method
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"
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def main()
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%s
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end
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results = main()
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File.open('%s', 'w'){ |f| f.write((results.class == String) ? results : results.inspect) }
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")
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(defun org-babel-ruby-evaluate (buffer body &optional result-type)
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"Pass BODY to the Ruby process in BUFFER. If RESULT-TYPE equals
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'output then return a list of the outputs of the statements in
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BODY, if RESULT-TYPE equals 'value then return the value of the
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last statement in BODY, as elisp."
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(if (not session)
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;; external process evaluation
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(save-window-excursion
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(case result-type
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(output
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(with-temp-buffer
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(insert body)
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;; (message "buffer=%s" (buffer-string)) ;; debugging
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(shell-command-on-region (point-min) (point-max) "ruby" 'replace)
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(buffer-string)))
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(value
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(let ((tmp-file (make-temp-file "ruby-functional-results")))
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(with-temp-buffer
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(insert (format org-babel-ruby-wrapper-method body tmp-file))
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;; (message "buffer=%s" (buffer-string)) ;; debugging
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(shell-command-on-region (point-min) (point-max) "ruby"))
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(org-babel-ruby-table-or-string
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(with-temp-buffer (insert-file-contents tmp-file) (buffer-string)))))))
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;; comint session evaluation
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(let* ((full-body
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(mapconcat
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#'org-babel-chomp
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(list body org-babel-ruby-last-value-eval org-babel-ruby-eoe-indicator) "\n"))
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(raw (org-babel-comint-with-output buffer org-babel-ruby-eoe-indicator t
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(insert full-body) (comint-send-input nil t)))
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(results (cdr (member org-babel-ruby-eoe-indicator
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(reverse (mapcar #'org-babel-ruby-read-string
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(mapcar #'org-babel-trim raw)))))))
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(case result-type
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(output (mapconcat #'identity (reverse (cdr results)) "\n"))
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(value (org-babel-ruby-table-or-string (car results)))))))
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(defun org-babel-ruby-read-string (string)
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"Strip \\\"s from around ruby string"
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(if (string-match "\"\\([^\000]+\\)\"" string)
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(match-string 1 string)
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string))
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(provide 'org-babel-ruby)
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;;; org-babel-ruby.el ends here
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