;;; 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 . ;;; 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) (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.") (defcustom org-babel-ruby-hline-to "nil" "Replace hlines in incoming tables with this when translating to ruby." :group 'org-babel :version "24.4" :package-version '(Org . "8.0") :type 'string) (defcustom org-babel-ruby-nil-to 'hline "Replace 'nil' in ruby tables with this before returning." :group 'org-babel :version "24.4" :package-version '(Org . "8.0") :type 'string) (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 (org-babel-result-cond result-params result (org-babel-ruby-table-or-string 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 ", ") "]") (if (equal var 'hline) org-babel-ruby-hline-to (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." ((lambda (res) (if (listp res) (mapcar (lambda (el) (if (equal el 'nil) org-babel-ruby-nil-to el)) res) res)) (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 (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