27.0.91; Avoid error on org-html-fontify-code

[pierre.techoueyres@gmail.com]

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Hello Org's developpers,

Some time ago I tried to export in html form an org file containing many
src blocks and ended with the following message :

org-html-do-format-code: Buffer is read-only: #<killed buffer>

After narrowing down my file here are the steps to reproduce :

emacs -q
(require 'htmlize) ;; this is important else `org-html-fontify-code`
                   ;; will keep the wrong branch

;; open the ecm-org-src-ro.org ([1])
;; try to export as html

I've also attached a patch ([2]) to fix this.

I've also opened the bug 41641 with the sames informations.

Pierre

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#+title: ECM - src block read-only

   #+begin_src compilation
-*- mode: compilation; default-directory: "~/Travail/VCS/Emacs/emacs-org-mode/" -*-
Compilation started at Fri May 29 20:05:37

make -k targets 

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Compilation finished at Fri May 29 20:05:37
   #+end_src

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From c292c6bc638b6ae94bfe1fa8636b819b1d655d0c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pierre=20T=C3=A9choueyres?= <pierre.techoueyres@free.fr>
Date: Mon, 1 Jun 2020 12:30:04 +0200
Subject: [PATCH] ox-html.el: Fix read-only error when export src bloc

When the type of src block involve an read-only buffer (ex:
compilation mode) avoid to setup the temp buffer as read-only and
error when processing it

* lisp/ox-html.el (org-html-fontify-code): set `inhibit-read-only' to
avoid read-only temp buffer.
---
 lisp/ox-html.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/ox-html.el b/lisp/ox-html.el
index fe0a315c9..32996c2c2 100644
--- a/lisp/ox-html.el
+++ b/lisp/ox-html.el
@@ -2156,7 +2156,8 @@ org-html-fontify-code
 	  ;; htmlize
 	  (setq code
 		(let ((output-type org-html-htmlize-output-type)
-		      (font-prefix org-html-htmlize-font-prefix))
+		      (font-prefix org-html-htmlize-font-prefix)
+		      (inhibit-read-only t))
 		  (with-temp-buffer
 		    ;; Switch to language-specific mode.
 		    (funcall lang-mode)
-- 
2.26.2