Re: allow gnuplot to generate plot in different directories

[Eric S Fraga <esflists@gmail.com>]

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On Wednesday,  6 Dec 2017 at 23:20, Nicolas Goaziou wrote:
> Hello,
>
> Eric S Fraga <esflists@gmail.com> writes:
>
>> attached is a patch (relative to master from a few minutes ago) which
>> allows gnuplot babel blocks to send the output to the right
>> directory.  I have tested this with both buffers associated with actual
>> files and buffers not associated with any file.
>
> Thank you. Shouldn't it go in maint?

I have no idea what the protocol here is.  But, in any case, attached is
a new patch relative to maint.

>
>> +      ;; setting the directory needs to be done first so that
>> +      ;; subsequent 'output' directive goes to the right place
>
> Nitpick:

I hate upper case (an RSI thing... ;-)) but okay.  also noting that the
previous comment started with lower case.  and should single sentence
comments end with a full stop (.)?

Thanks,
eric

-- 
Eric S Fraga via Emacs 27.0.50, Org release_9.1.4-200-g15df8d

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From 6857093df26af908d85dfb1e9512f1a838b2ffd7 Mon Sep 17 00:00:00 2001
From: Eric S Fraga <e.fraga@ucl.ac.uk>
Date: Thu, 7 Dec 2017 06:56:41 +0000
Subject: [PATCH] allow gnuplot to generate plots in different directories

* lisp/ob-gnuplot.el (org-babel-expand-body:gnuplot) if the org buffer
  is associated with a file, direct gnuplot to change to the directory
  for that file.
---
 lisp/ob-gnuplot.el | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lisp/ob-gnuplot.el b/lisp/ob-gnuplot.el
index b0743f604..241f1d3a4 100644
--- a/lisp/ob-gnuplot.el
+++ b/lisp/ob-gnuplot.el
@@ -116,6 +116,8 @@ code."
            (timefmt (cdr (assq :timefmt params)))
            (time-ind (or (cdr (assq :timeind params))
                          (when timefmt 1)))
+	   (directory (and (buffer-file-name)
+			   (file-name-directory (buffer-file-name))))
 	   (add-to-body (lambda (text) (setq body (concat text "\n" body)))))
       ;; append header argument settings to body
       (when title (funcall add-to-body (format "set title '%s'" title)))
@@ -161,7 +163,10 @@ code."
 			  (format "\\$%s" (car pair)) (cdr pair) body)))
 	    vars)
       (when prologue (funcall add-to-body prologue))
-      (when epilogue (setq body (concat body "\n" epilogue))))
+      (when epilogue (setq body (concat body "\n" epilogue)))
+      ;; Setting the directory needs to be done first so that
+      ;; subsequent 'output' directive goes to the right place.
+      (when directory (funcall add-to-body (format "cd '%s'" directory))))
     body))
 
 (defun org-babel-execute:gnuplot (body params)
-- 
2.15.0


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