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[Orgmode] [Babel] Debugging shell code that misbehaves
From: |
Sébastien Vauban |
Subject: |
[Orgmode] [Babel] Debugging shell code that misbehaves |
Date: |
Thu, 14 Oct 2010 14:56:00 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/23.1.50 (windows-nt) |
#+TITLE: Debugging shell code that misbehaves
#+DATE: 2010-10-14
#+LANGUAGE: en_US
* Use case
Let's say that:
- This file is in =~/Client/Spec=
- I'm working on such a chunk of code:
#+begin_src sh :results output :exports results
grep indAllocType ../Ontology/champs.csv |\
iconv -f LATIN1 -t UTF8 |\
tr "[]" "|" | cut -d "|" -f 2 | cut -d " " -f 2- |\
sed 's%, %\n%g'
#+end_src
and that, when executing it, I've got an error with not enough context for me
to understand what's the problem is.
Sneak preview: under Cygwin, the =to= language (of the =iconv= command) must
be =UTF-8= in the above case (with a dash).
* Debug it
So, in order to debug, I decide to add a =session= argument:
#+begin_src sh :results output :exports results :session sva
grep indAllocType ../Ontology/champs.csv |\
iconv -f LATIN1 -t UTF8 |\
tr "[]" "|" | cut -d "|" -f 2 | cut -d " " -f 2- |\
sed 's%, %\n%g'
#+end_src
and, there, something totally different is occurring: =grep= is not finding
the file anymore.
Why? Because adding the session argument makes the code executed from my *home
directory*, while it was executed from the *document's directory* in the first
place.
So, this is not the right way to debug... as *conditions do change*.
* Solution?
What's the right solution for such a case?
- Putting a full path to the file =champs.csv= (instead of the relative one)
is not OK for me, as all of this is under SVN, and I want this to be
executable on someone's else PC (even if placed somewhere else).
- Add an explicit =cd= to the right place, before the commands execute. Not
possible, for the same reason as above.
Is there some natural way to work around this?
Best regards,
Seb
--
Sébastien Vauban
- [Orgmode] [Babel] Debugging shell code that misbehaves,
Sébastien Vauban <=