Bug: org-babel-tangle purges comma at the beginning of a line ]

Bug: org-babel-tangle purges comma at the beginning of a line ]

[Simon Campese]

Hello,

I just noticed that org-babel-tangle removes the comma if its at the
beginning of a line inside a source block. This seems to be independent from the
language indicated (tried with sh, js and emacs-lisp) and also
independent from the characters that follow (',' gets tangled to a blank
line, ',,,' gets tangled to ',,', ',sometext' gets tangled to 'sometext'
etc.).


Best,

Simon

Emacs  : GNU Emacs 24.2.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.6.4) 
 of 2013-01-20 on eric
Package: Org-mode version 7.9.3e (7.9.3e-1122-g27da9a @ mixed
 installation! ~/.emacs.d/el-get/org-mode/contrib/lisp/ and
 ~/.emacs.d/el-get/org-mode/lisp/) 

Re: Bug: org-babel-tangle purges comma at the beginning of a line ]

[Nicolas Goaziou]

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Hello,

Simon Campese <emacs-orgmode@campese.de> writes:

> I just noticed that org-babel-tangle removes the comma if its at the
> beginning of a line inside a source block. This seems to be independent from the
> language indicated (tried with sh, js and emacs-lisp) and also
> independent from the characters that follow (',' gets tangled to a blank
> line, ',,,' gets tangled to ',,', ',sometext' gets tangled to 'sometext'
> etc.).

That looks like a bug, indeed. Thank you for reporting it.

Would the following patch fix it?


Regards,

-- 
Nicolas Goaziou

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From c9dc22ea651056d6411dd27b57a252007d97bc00 Mon Sep 17 00:00:00 2001
From: Nicolas Goaziou <n.goaziou@gmail.com>
Date: Wed, 27 Feb 2013 08:58:32 +0100
Subject: [PATCH] ob-tangle: Correctly unescape code when tangling

* lisp/ob-tangle.el (org-babel-spec-to-string): Use dedicated function
  for unescaping code.
---
 lisp/ob-tangle.el | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lisp/ob-tangle.el b/lisp/ob-tangle.el
index 6c79794..2c2e7dd 100644
--- a/lisp/ob-tangle.el
+++ b/lisp/ob-tangle.el
@@ -346,8 +346,7 @@ form
     (insert
      (format
       "%s\n"
-      (replace-regexp-in-string
-       "^," ""
+      (org-unescape-code-in-string
        (org-babel-trim body (if org-src-preserve-indentation "[\f\n\r\v]")))))
     (when link-p
       (funcall
-- 
1.8.1.4

Re: Bug: org-babel-tangle purges comma at the beginning of a line ]

[Simon Campese]

Hello Nicolas, 

thanks a lot for the patch. It partly works, as long as there are some
more characters after the first comma, but a single comma at the beginning of
a line still gets purged. Now we can start discussing about whoever
would want to have a single comma in a line of its own... :-) 


Best wishes,

Simon

Re: Bug: org-babel-tangle purges comma at the beginning of a line ]

[Nicolas Goaziou]

Hello,

Simon Campese <emacs-orgmode@campese.de> writes:

> thanks a lot for the patch. It partly works, as long as there are some
> more characters after the first comma, but a single comma at the beginning of
> a line still gets purged. Now we can start discussing about whoever
> would want to have a single comma in a line of its own... :-)

I have applied the patch. Thank you for reporting the problem.

I think the other problem is unrelated to this. Could you provide an ECM
demonstrating this behaviour?


Regards,

-- 
Nicolas Goaziou