Hello,

I was modifying the ox-html options alist to add an OPTION key to
`:html-extension'. I do it like this:

    (:html-extension nil "html-extension" org-html-extension)

But after re-evaluate the ox-html backend definition and adding this to
my org-mode file:

    #+OPTIONS: html-extension:"bear"

The exported file still have an ".html" extension, and not a ".bear".

If I debug the function `org-html-export-to-html', its variable `ext-plist' is 
empty
and so the function don't use the value of option `:html-extension' but
of variable `org-html-extension' instead.

Ideally, `org-html-export-to-html' should use the value set with
`#+OPTIONS:' to define the extension of the exported file.

Best regards.



Emacs  : GNU Emacs 30.1 (build 1, x86_64-redhat-linux-gnu, GTK+ Version 
3.24.43, cairo version 1.18.2)
 of 2025-03-13
Package: Org mode version 9.7.11 (release_9.7.11 @ 
/usr/share/emacs/30.1/lisp/org/)

current state:
==============
(setq
 org-yank-image-file-name-function 'org-yank-image-autogen-filename
 org-persist-before-write-hook '(org-element--cache-persist-before-write)
 org-html-format-headline-function 'org-html-format-headline-default-function
 org-html-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"]
 org-latex-format-inlinetask-function 
'org-latex-format-inlinetask-default-function
 org-speed-command-hook '(org-speed-command-activate 
org-babel-speed-command-activate)
 org-persist-after-read-hook '(org-element--cache-persist-after-read)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-latex-format-headline-function 'org-latex-format-headline-default-function
 org-latex-format-drawer-function #[514 "\207" [] 3 "\n\n(fn _ CONTENTS)"]
 org-mode-hook '(#[0 "\301\211%10\207" [imenu-create-index-function 
org-imenu-get-tree] 2]
                 #[0 "\300\301\302\303\304$\207"
                   [add-hook change-major-mode-hook org-fold-show-all append 
local] 5]
                 #[0 "\300\301\302\303\304$\207"
                   [add-hook change-major-mode-hook org-babel-show-result-all 
append local] 5]
                 org-babel-result-hide-spec org-babel-hide-all-hashes)
 org-confirm-shell-link-function 'yes-or-no-p
 org-odt-format-headline-function 'org-odt-format-headline-default-function
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-occur-hook '(org-first-headline-recenter)
 org-html-format-inlinetask-function 
'org-html-format-inlinetask-default-function
 org-ascii-format-drawer-function #[771 "%1\207" [] 4 "\n\n(fn NAME CONTENTS 
WIDTH)"]
 org-bibtex-headline-format-function 'org-bibtex-headline-format-default
 org-link-parameters '(("attachment" :follow org-attach-follow :complete 
org-attach-complete-link)
                       ("id" :follow org-id-open :store org-id-store-link-maybe)
                       ("eww" :follow org-eww-open :store org-eww-store-link)
                       ("rmail" :follow org-rmail-open :store 
org-rmail-store-link)
                       ("mhe" :follow org-mhe-open :store org-mhe-store-link)
                       ("irc" :follow org-irc-visit :store org-irc-store-link 
:export org-irc-export)
                       ("info" :follow org-info-open :export org-info-export 
:store
                        org-info-store-link :insert-description 
org-info-description-as-command)
                       ("gnus" :follow org-gnus-open :store org-gnus-store-link)
                       ("docview" :follow org-docview-open :export 
org-docview-export :store
                        org-docview-store-link)
                       ("bibtex" :follow org-bibtex-open :store 
org-bibtex-store-link)
                       ("bbdb" :follow org-bbdb-open :export org-bbdb-export 
:complete
                        org-bbdb-complete-link :store org-bbdb-store-link)
                       ("w3m" :store org-w3m-store-link)
                       ("doi" :follow org-link-doi-open :export 
org-link-doi-export) ("file+sys")
                       ("file+emacs") ("shell" :follow org-link--open-shell)
                       ("news" :follow
                        #[514 "\301\300\302%4Q%2\"\207" ["news" browse-url ":"] 
6 "\n\n(fn URL ARG)"])
                       ("mailto" :follow
                        #[514 "\301\300\302%4Q%2\"\207" ["mailto" browse-url 
":"] 6
                          "\n\n(fn URL ARG)"]
                        )
                       ("https" :follow
                        #[514 "\301\300\302%4Q%2\"\207" ["https" browse-url 
":"] 6 "\n\n(fn URL ARG)"]
                        )
                       ("http" :follow
                        #[514 "\301\300\302%4Q%2\"\207" ["http" browse-url ":"] 
6 "\n\n(fn URL ARG)"])
                       ("ftp" :follow
                        #[514 "\301\300\302%4Q%2\"\207" ["ftp" browse-url ":"] 
6 "\n\n(fn URL ARG)"])
                       ("help" :follow org-link--open-help :store 
org-link--store-help)
                       ("file" :complete org-link-complete-file)
                       ("elisp" :follow org-link--open-elisp))
 org-persist-directory "/tmp/org-persist-5VEarY"
 org-cycle-tab-first-hook '(org-babel-hide-result-toggle-maybe 
org-babel-header-arg-expand)
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-tab-first-hook '(org-babel-hide-result-toggle-maybe 
org-babel-header-arg-expand)
 org-sort-function 'string-collate-lessp
 org--warnings nil
 org-babel-pre-tangle-hook '(save-buffer)
 org-export-before-parsing-hook '(org-attach-expand-links)
 org-link-shell-confirm-function 'yes-or-no-p
 org-fold-core-isearch-open-function 'org-fold--isearch-reveal
 outline-isearch-open-invisible-function 'outline-isearch-open-invisible
 org-src-mode-hook '(org-src-babel-configure-edit-buffer 
org-src-mode-configure-edit-buffer)
 org-agenda-loop-over-headlines-in-active-region nil
 org-link-elisp-confirm-function 'yes-or-no-p
 org-odt-format-inlinetask-function 'org-odt-format-inlinetask-default-function
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-show-empty-lines
                  org-cycle-optimize-window-after-visibility-change 
org-cycle-display-inline-images)
 org-persist-before-read-hook '(org-element--cache-persist-before-read)
 org-ascii-format-inlinetask-function 'org-ascii-format-inlinetask-default
 org-odt-format-drawer-function #[514 "\207" [] 3 "\n\n(fn NAME CONTENTS)"]
 )

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