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Re: [O] Detangle - How to get it to work

From: Paul Dumais
Subject: Re: [O] Detangle - How to get it to work
Date: Mon, 5 Aug 2013 17:10:33 -0600

Ok, I have a work-around which involves handling an error in
ob-tangle.el. The bug is in the org-babel-tangle-jump-to-org function
where 'forward-char' is spitting out an unhandled error as it tries to
move beyond the end of the buffer.

Here's the diff for my simple (half) fix:

1 file changed, 4 insertions(+), 1 deletion(-)
 lisp/ob-tangle.el | 5 ++++-

Modified   lisp/ob-tangle.el
diff --git a/lisp/ob-tangle.el b/lisp/ob-tangle.el
index 8141943..5cf50d4 100644
--- a/lisp/ob-tangle.el
+++ b/lisp/ob-tangle.el
@@ -542,7 +542,10 @@ which enable the original code blocks to be found."
       ;; Then move forward the correct number of characters in the
       ;; code buffer.
-      (forward-char (- mid body-start))
+      (condition-case err
+  (forward-char (- mid body-start))
+ (error (message "mid %d body-start %d\nerror message: %s"
+ mid body-start (error-message-string err))))
       ;; And return to the Org-mode buffer with the point in the right
       ;; place.

The real fix would involve finding out why the (- mid body-start)
value is not calculated correctly and puts point beyond the end of the

On Mon, Aug 5, 2013 at 1:36 PM, Paul Dumais <address@hidden> wrote:
> Hi, I think detangle is a must for collaborative work.
> I think I have read the instructions correctly, yet I can't seem to
> get it to work. Here is a minimal test:
> Org file named test.org:
> #+PROPERTY: comments link
> * Some source
> #+begin_src clojure :tangle yes
>   (defn hello [] (println "hello"))
> #+end_src
> This produces the following file named test.clj upon tangling:
> ;; [[file:~/test.org::*Some%20source][Some\ source:1]]
> (defn hello [] (println "hello"))
> ;; Some\ source:1 ends here
> When I add a line to the file:
> (def x 1)
>  and save, then do M-x org-babel-detangle, it says:
> Detangled 0 code blocks
> Is there something I'm missing?
> Thanks!

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