Re: :session question - a simple PATCH

[Eric Schulte <schulte.eric@gmail.com>]

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Achim Gratz <Stromeko@Nexgo.DE> writes:

> Am 28.03.2013 20:35, schrieb Andreas Leha:
>> so it seems, currently, I (and John...) can not have both, /file local/
>> and /language local/ variables.
>>
>> - The emacs-lisp-block
>>    #+begin_src emacs-lisp
>>      (setq org-babel-default-header-args:R
>>            '((:session . "org-R")))
>>    #+end_src
>>    works, of course, but sets the R-session globally.
>>
>> - The file-local variables (both way to set them) choke on the colon in
>>    the varible name.
>
> You could use
>
> eval: (setq etq org-babel-default-header-args:R '((:session . "org-R")))
>
> instead of setting the variable directly.
>

The above sets the value globally, the following should work for
everyone.


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#+Title: Example

The value in this buffer is...
#+begin_src emacs-lisp
  org-babel-default-header-args:R
#+end_src

#+RESULTS:
| (:session . bar) |

# Local Variables:
# eval: (setq-local org-babel-default-header-args:R '((:session . "bar")))
# End:

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>
>> I do not know where to search for the reason, these variables work for
>> Eric but not for me (and John...).
>
> I don't think they work for Eric if he tries to set them as file variable.
>

This was my fault.  I miss-interpreted what was happening on my system,
these aren't working for me either.

>
>> So attached is a simple patch (search-and-replace) that renames all
>> org-babel-default-header-args:* variables to
>> org-babel-default-header-args-*
>
> In keeping with the spirit of the original naming I'd suggest
> switching from ":" to "/".  I still think this is a bug in how Emacs
> evaluates the local variables, but since it has been that way for ages
> it probably has become a feature.
>

I agree that this is an Emacs bug.  The attached patch fixes this bug, I
suppose it should be submitted to the emacs-dev mailing list.


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# Bazaar merge directive format 2 (Bazaar 0.90)
# revision_id: schulte.eric@gmail.com-20130328230926-46be4fl21w1g28wc
# target_branch: http://bzr.savannah.gnu.org/r/emacs/trunk/
# testament_sha1: 969600ed8b879f2317f13e9f06968aafad4f786d
# timestamp: 2013-03-28 17:09:47 -0600
# base_revision_id: monnier@iro.umontreal.ca-20130328163306-\
#   419khox8aneaoaxv
# 
# Begin patch
=== modified file 'lisp/files.el'
--- lisp/files.el	2013-03-24 06:42:25 +0000
+++ lisp/files.el	2013-03-28 23:09:26 +0000
@@ -3058,7 +3058,11 @@
 	       (while (and (or (not mode-only)
 			       (not result))
 			   (< (point) end))
-		 (unless (looking-at "[ \t]*\\([^ \t\n:]+\\)[ \t]*:[ \t]*")
+                 ;; The first of these next two regexs handles the
+                 ;; case when a variable name includes a ":", such as
+                 ;; the `org-babel-default-header-args:R' variable.
+		 (unless (or (looking-at "[ \t]*\\([^ \t\n]?+\\)[ \t]*:[ \t]*")
+                             (looking-at "[ \t]*\\([^ \t\n:]+\\)[ \t]*:[ \t]*"))
 		   (message "Malformed mode-line")
 		   (throw 'malformed-line nil))
 		 (goto-char (match-end 0))

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Cheers,

>
>
> Regards,

-- 
Eric Schulte
http://cs.unm.edu/~eschulte