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[O] [PATCH] Handle literal 'hline arguments passed to ruby.

From: Rick Frankel
Subject: [O] [PATCH] Handle literal 'hline arguments passed to ruby.
Date: Thu, 15 Aug 2013 14:50:41 -0400
User-agent: Roundcube Webmail/0.9.0

Solution shamelessly copied from ob-python.

* lisp/ob-ruby.el: New customizations `org-babel-ruby-hline-to' and
(org-babel-ruby-var-to-ruby): Convert incoming 'hlines.
(org-babel-ruby-table-or-string): Convert outgoing nils.
lisp/ob-ruby.el | 26 ++++++++++++++++++++++++--
1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/lisp/ob-ruby.el b/lisp/ob-ruby.el
index 20fb418..d15d288 100644
--- a/lisp/ob-ruby.el
+++ b/lisp/ob-ruby.el
@@ -50,6 +50,20 @@
(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'."
@@ -115,13 +129,21 @@ 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)))
+    (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."
-  (org-babel-script-escape results))
+  ((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.

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