Re: Erroneous "No such file or directory" with babel and remote dir

[Nick Dokos <nicholas.dokos@hp.com>]

Nick Dokos <nicholas.dokos@hp.com> wrote:

> > Back in the days of release_7.01h, the following used to work:
> > 
> > ,------------------------------------------
> > | #+begin_src sh :dir /loris@othercomputer:
> > | hostname
> > | #+end_src
> > `------------------------------------------
> > 
> > Currently it produces the error:
> > 
> > ,---------------------------------------------------
> > | apply: Wrong type argument: number-or-marker-p, ""
> > `---------------------------------------------------
> > 

BTW, I get no error with the (more or less) current version of
org I'm using:

Org-mode version 7.9.2 (release_7.9.2-582-g6d099e @ /home/nick/elisp/org-mode/lisp/)

I just get the wrong answer: instead of evaluating on the remote, babel
evaluates it locallly.

> > I have had another go at bisecting this problem and came up with this:
> > 
> > ,-------------------------------------------------------------------------------------------------------------
> > | 9c878a8290c071fbe5e97bc33c300ef2f07d6153 is the first bad commit
> > | commit 9c878a8290c071fbe5e97bc33c300ef2f07d6153
> > | Author: Dan Davison <davison@stats.ox.ac.uk>
> > | Date:   Mon Aug 30 09:34:05 2010 -0700
> > | 
> > |     babel: Fix temporary file processing in the remote execution case.
> > |     
> > |         * ob.el (org-babel-temp-file): Don't use babel temporary
> > |         directory in remote case; use make-temp-file with remote file
> > |         name so that temp file is guaranteed not to exist previously
> > |         on remote machine.
> > |         (org-babel-tramp-localname): New function to return local name
> > |         portion of possibly remote file specification
> > |     
> > |         * ob-R.el (org-babel-R-evaluate-external-process): Respond to
> > |         changes in `org-babel-temp-file'; pass local file name to
> > |         remote R process.
> > |         (org-babel-R-evaluate-session) Respond to
> > |         changes in `org-babel-temp-file'; pass local file name to
> > |         remote R process.
> > | 
> > | :040000 040000 b31e072cf6b2951e95b7956d907303e7a04a8cfd 5f794ada52cceb0614fe7962a399f7e549759003 M      lisp
> > `-------------------------------------------------------------------------------------------------------------
> > 
> > Does that help anyone any further?
> > 
> 
> I don't think so: afaict, both 7.01h (which did not contain this patch)
> and 7.02 (which did) do the right thing (at least with your simple
> script above). Something else broke it.
> 

I checked successive versions from 7.01h onwards and found breakage
between release_7.8 and release_7.9. So I bisected and came up
with this as the bad commit:

,----
| commit 5cb80c7e5b9bcae180b799d2a49c78d529e029f0
| Author: Eric Schulte <eric.schulte@gmx.com>
| Date:   Mon Mar 12 13:23:53 2012 -0400
| 
|     apply :shebang and :padline to shell script execution
|     
|     * lisp/ob-sh.el (org-babel-execute:sh): Pass all params to subroutine.
|       (org-babel-sh-evaluate): Apply :shebang and :padline to shell script
|       execution.
`----

Reverting it caused a merge conflict that I didn't have the patience to
resolve.  But I made branches, one with this commit as its tip and one
with its predecessor:

    git checkout -b foo 5cb80c7
    git checkout -b bar de09874

Testing on foo gives me an error, testing on bar gives the correct
result.  So I'm pretty sure this commit introduced the problem. Eric has
applied a partial fix since then which gets rid of the error but still
gives the wrong answer (not Eric's fault: he followed my suggestion, but
I was treating the symptom, not the disease).

But I think this commit is the place that deserves more scrutiny.

HTH,
Nick