[PATCH] avoid loading major modes when exporting to file

[Timothy <tecosaur@gmail.com>]

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Hello,

Another little patch, this time a one-liner.
I think the commit description is pretty thorough, so give that a look.
TLDR; it makes `org-export-to-file' behave a bit more nicely.

--
Timothy


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From eb9d7c038dbb9e7a4b89edf61db83a31dda27170 Mon Sep 17 00:00:00 2001
From: TEC <tec@tecosaur.com>
Date: Wed, 31 Mar 2021 23:16:58 +0800
Subject: [PATCH] ox: don't load a major-mode when exporting to file

* lisp/ox.el (org-export-to-file): Prior to this, when
`org-export-to-file' was called it activated the major mode for that
file type based on `auto-mode-alist'.  This can be mildly annoying in
various ways as loading the major mode (1) makes the export take
longer, (2) can produce unwanted "noise" while initialising, namely
warnings and errors related to the mode itself, (3) can produce spurious
files like an .auctex-auto folder.  By locally binding `auctex-auto' to
nil all of these undesirable behaviours can be avoided.
---
 lisp/ox.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/ox.el b/lisp/ox.el
index f705bc83a..96d2866dd 100644
--- a/lisp/ox.el
+++ b/lisp/ox.el
@@ -6388,7 +6388,8 @@   (defun org-latex-export-to-latex
   (declare (indent 2))
   (if (not (file-writable-p file)) (error "Output file not writable")
     (let ((ext-plist (org-combine-plists `(:output-file ,file) ext-plist))
-	  (encoding (or org-export-coding-system buffer-file-coding-system)))
+	  (encoding (or org-export-coding-system buffer-file-coding-system))
+          (auto-mode-alist nil))
       (if async
           (org-export-async-start
 	      `(lambda (file)
-- 
2.30.1