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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