Re: publishing: no default publishing function, or symbol is not defined

[Yasushi SHOJI <yasushi.shoji@gmail.com>]

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Hi Chris,

On Sun, Jun 20, 2021 at 3:30 AM Christopher W. Ryan via General
discussions about Org-mode. <emacs-orgmode@gnu.org> wrote:
> But is there not a default publishing action, that requires no explicit
> :publishing-function statement? This part of the documentation says
> there is:
>
> https://orgmode.org/manual/Publishing-action.html#Publishing-action

I just encountered the exact problem.  The attached patch fixed it for
me.  Would you mind testing it?

ps. I've dug a bit in the commit history but I couldn't find any evidence that
we've ever supported this default behaviour at least with the current exporter.

Nicolas, if that's true, should we change the documentation instead?

Best,
-- 
               yashi

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From 2fdf67b4ddfac97acb2b685957b6e4ca26474fb4 Mon Sep 17 00:00:00 2001
From: Yasushi SHOJI <yashi@spacecubics.com>
Date: Sun, 19 Sep 2021 18:56:19 +0900
Subject: [PATCH] ox-publish: Set default transformation

As documented in Org Manual, we should have the default transformation
function set to org-html-publish-to-html.

Signed-off-by: Yasushi SHOJI <yashi@spacecubics.com>
---
 lisp/ox-publish.el | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lisp/ox-publish.el b/lisp/ox-publish.el
index c25dd5473..99b1dca81 100644
--- a/lisp/ox-publish.el
+++ b/lisp/ox-publish.el
@@ -617,7 +617,8 @@ files, when entire projects are published (see
 			  (abbreviate-file-name filename))))
 	 (project-plist (cdr project))
 	 (publishing-function
-	  (pcase (org-publish-property :publishing-function project)
+	  (pcase (org-publish-property :publishing-function project
+                                       'org-html-publish-to-html)
 	    (`nil (user-error "No publishing function chosen"))
 	    ((and f (pred listp)) f)
 	    (f (list f))))
-- 
2.33.0