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;;; ob-ruby.el --- org-babel functions for ruby evaluation
;; Copyright (C) 2009-2013 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research
;; Homepage: http://orgmode.org
;; This file is part of GNU Emacs.
;; GNU Emacs 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 of the License, or
;; (at your option) any later version.
;; GNU Emacs 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. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Org-Babel support for evaluating ruby source code.
;;; Requirements:
;; - ruby and irb executables :: http://www.ruby-lang.org/
;;
;; - ruby-mode :: Can be installed through ELPA, or from
;; http://github.com/eschulte/rinari/raw/master/util/ruby-mode.el
;;
;; - inf-ruby mode :: Can be installed through ELPA, or from
;; http://github.com/eschulte/rinari/raw/master/util/inf-ruby.el
;;; Code:
(require 'ob)
(require 'ob-ref)
(require 'ob-comint)
(require 'ob-eval)
(eval-when-compile (require 'cl))
(declare-function run-ruby "ext:inf-ruby" (&optional command name))
(declare-function xmp "ext:rcodetools" (&optional option))
(defvar org-babel-tangle-lang-exts)
(add-to-list 'org-babel-tangle-lang-exts '("ruby" . "rb"))
(defvar org-babel-default-header-args:ruby '())
(defvar org-babel-ruby-command "ruby"
"Name of command to use for executing ruby code.")
(defun org-babel-execute:ruby (body params)
"Execute a block of Ruby code with Babel.
This function is called by `org-babel-execute-src-block'."
(let* ((session (org-babel-ruby-initiate-session
(cdr (assoc :session params))))
(result-params (cdr (assoc :result-params params)))
(result-type (cdr (assoc :result-type params)))
(full-body (org-babel-expand-body:generic
body params (org-babel-variable-assignments:ruby params)))
(result (if (member "xmp" result-params)
(with-temp-buffer
(require 'rcodetools)
(insert full-body)
(xmp (cdr (assoc :xmp-option params)))
(buffer-string))
(org-babel-ruby-evaluate
session full-body result-type result-params))))
(org-babel-reassemble-table
result
(org-babel-pick-name (cdr (assoc :colname-names params))
(cdr (assoc :colnames params)))
(org-babel-pick-name (cdr (assoc :rowname-names params))
(cdr (assoc :rownames params))))))
(defun org-babel-prep-session:ruby (session params)
"Prepare SESSION according to the header arguments specified in PARAMS."
;; (message "params=%S" params) ;; debugging
(let* ((session (org-babel-ruby-initiate-session session))
(var-lines (org-babel-variable-assignments:ruby params)))
(org-babel-comint-in-buffer session
(sit-for .5) (goto-char (point-max))
(mapc (lambda (var)
(insert var) (comint-send-input nil t)
(org-babel-comint-wait-for-output session)
(sit-for .1) (goto-char (point-max))) var-lines))
session))
(defun org-babel-load-session:ruby (session body params)
"Load BODY into SESSION."
(save-window-excursion
(let ((buffer (org-babel-prep-session:ruby session params)))
(with-current-buffer buffer
(goto-char (process-mark (get-buffer-process (current-buffer))))
(insert (org-babel-chomp body)))
buffer)))
;; helper functions
(defun org-babel-variable-assignments:ruby (params)
"Return list of ruby statements assigning the block's variables."
(mapcar
(lambda (pair)
(format "%s=%s"
(car pair)
(org-babel-ruby-var-to-ruby (cdr pair))))
(mapcar #'cdr (org-babel-get-header params :var))))
(defun org-babel-ruby-var-to-ruby (var)
"Convert VAR into a ruby variable.
Convert an elisp value into a string of ruby source code
specifying a variable of the same value."
(if (listp var)
(concat "[" (mapconcat #'org-babel-ruby-var-to-ruby var ", ") "]")
(format "%S" var)))
(defun org-babel-ruby-table-or-string (results)
"Convert RESULTS into an appropriate elisp value.
If RESULTS look like a table, then convert them into an
Emacs-lisp table, otherwise return the results as a string."
(org-babel-script-escape results))
(defun org-babel-ruby-initiate-session (&optional session params)
"Initiate a ruby session.
If there is not a current inferior-process-buffer in SESSION
then create one. Return the initialized session."
(unless (string= session "none")
(require 'inf-ruby)
(let ((session-buffer (save-window-excursion
(run-ruby nil session) (current-buffer))))
(if (org-babel-comint-buffer-livep session-buffer)
(progn (sit-for .25) session-buffer)
(sit-for .5)
(org-babel-ruby-initiate-session session)))))
(defvar org-babel-ruby-eoe-indicator ":org_babel_ruby_eoe"
"String to indicate that evaluation has completed.")
(defvar org-babel-ruby-f-write
"File.open('%s','w'){|f| f.write((_.class == String) ? _ : _.inspect)}")
(defvar org-babel-ruby-pp-f-write
"File.open('%s','w'){|f| $stdout = f; pp(results); $stdout = orig_out}")
(defvar org-babel-ruby-wrapper-method
"
def main()
%s
end
results = main()
File.open('%s', 'w'){ |f| f.write((results.class == String) ? results : results.inspect) }
")
(defvar org-babel-ruby-pp-wrapper-method
"
require 'pp'
def main()
%s
end
results = main()
File.open('%s', 'w') do |f|
$stdout = f
pp results
end
")
(defun org-babel-ruby-evaluate
(buffer body &optional result-type result-params)
"Pass BODY to the Ruby process in BUFFER.
If RESULT-TYPE equals 'output then return a list of the outputs
of the statements in BODY, if RESULT-TYPE equals 'value then
return the value of the last statement in BODY, as elisp."
(if (not buffer)
;; external process evaluation
(case result-type
(output (org-babel-eval org-babel-ruby-command body))
(value (let ((tmp-file (org-babel-temp-file "ruby-")))
(org-babel-eval
org-babel-ruby-command
(format (if (member "pp" result-params)
org-babel-ruby-pp-wrapper-method
org-babel-ruby-wrapper-method)
body (org-babel-process-file-name tmp-file 'noquote)))
((lambda (raw)
(if (or (member "code" result-params)
(member "pp" result-params))
raw
(org-babel-ruby-table-or-string raw)))
(org-babel-eval-read-file tmp-file)))))
;; comint session evaluation
(case result-type
(output
(mapconcat
#'identity
(butlast
(split-string
(mapconcat
#'org-babel-trim
(butlast
(org-babel-comint-with-output
(buffer org-babel-ruby-eoe-indicator t body)
(mapc
(lambda (line)
(insert (org-babel-chomp line)) (comint-send-input nil t))
(list body org-babel-ruby-eoe-indicator))
(comint-send-input nil t)) 2)
"\n") "[\r\n]")) "\n"))
(value
((lambda (results)
(if (or (member "code" result-params) (member "pp" result-params))
results
(org-babel-ruby-table-or-string results)))
(let* ((tmp-file (org-babel-temp-file "ruby-"))
(ppp (or (member "code" result-params)
(member "pp" result-params))))
(org-babel-comint-with-output
(buffer org-babel-ruby-eoe-indicator t body)
(when ppp (insert "require 'pp';") (comint-send-input nil t))
(mapc
(lambda (line)
(insert (org-babel-chomp line)) (comint-send-input nil t))
(append
(list body)
(if (not ppp)
(list (format org-babel-ruby-f-write
(org-babel-process-file-name tmp-file 'noquote)))
(list
"results=_" "require 'pp'" "orig_out = $stdout"
(format org-babel-ruby-pp-f-write
(org-babel-process-file-name tmp-file 'noquote))))
(list org-babel-ruby-eoe-indicator)))
(comint-send-input nil t))
(org-babel-eval-read-file tmp-file)))))))
(defun org-babel-ruby-read-string (string)
"Strip \\\"s from around a ruby string."
(if (string-match "^\"\\([^\000]+\\)\"$" string)
(match-string 1 string)
string))
(provide 'ob-ruby)
;;; ob-ruby.el ends here
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