[patch] ox-latex.el: support for pgf files

[Rasmus <rasmus@gmx.us>]

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This patch adds support for pgf files.  pgf is the machine upon which
tikz is build.  For instance matplotlib (of Python) and printpgf (of
Octave) both produces pgf files.  It's just a question of recognizing
the extension.  With this patch the following document exports
correctly:

#+TITLE: PGF test
#+LATEX_HEADER: \usepackage{pgf}
#+BEGIN_SRC emacs-lisp :exports none
  (set (make-local-variable 'org-latex-pdf-process)
       '("xelatex -pdf %f"))
#+END_SRC
#+BEGIN_SRC python :results raw :exports results
  from matplotlib import pylab as plt
  x, y = plt.rand(2)
  plt.scatter(x, y)
  fig = "test.pgf"
  plt.savefig(fig) ## utf8 by default
  return("".join(["[[file:", fig, "]]"]))
#+END_SRC

–Rasmus

-- 
Hooray!

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From ff4f43378779eb557213df1cd474a5232333af7d Mon Sep 17 00:00:00 2001
From: "rasmus.pank" <rasmus.pank@gmail.com>
Date: Mon, 20 May 2013 11:58:47 +0200
Subject: [PATCH] Support for pgf files in ox-latex.el

	* ox-latex.el: pgf is recognized as an inline image and
	treated the same way tikz files.

Python matplotlib and pgfprint for Octave generates pgf plots
rather than TiKZ plots.  They need just be included via \input{.}.

TINYCHANGE
---
 lisp/ox-latex.el | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lisp/ox-latex.el b/lisp/ox-latex.el
index 41cf1d0..fdada8b 100644
--- a/lisp/ox-latex.el
+++ b/lisp/ox-latex.el
@@ -420,7 +420,7 @@ environment."
   :type 'string)
 
 (defcustom org-latex-inline-image-rules
-  '(("file" . "\\.\\(pdf\\|jpeg\\|jpg\\|png\\|ps\\|eps\\|tikz\\)\\'"))
+  '(("file" . "\\.\\(pdf\\|jpeg\\|jpg\\|png\\|ps\\|eps\\|tikz\\|pgf\\)\\'"))
   "Rules characterizing image files that can be inlined into LaTeX.
 
 A rule consists in an association whose key is the type of link
@@ -1739,7 +1739,7 @@ used as a communication channel."
 		    (if (not (string-match "\\`\\[\\(.*\\)\\]\\'" opt)) opt
 		      (match-string 1 opt))))
 	 image-code)
-    (if (equal filetype "tikz")
+    (if (member filetype '("tikz" "pgf"))
 	;; For tikz images:
 	;; - use \input to read in image file.
 	;; - if options are present, wrap in a tikzpicture environment.
-- 
1.8.2.3