[BUG] org-link-descriptive not honored as file-local-variable [9.5 (9.5-g0a86ad @ /home/gustavo/.emacs.d/elpa/org-9.5/)]

[Gustavo Barros]

Hi All,

Currently, trying to set `org-link-descriptive' as file-local-variable 
is not honored by Org, and doing so, leads to one of mismatched states 
between `org-link-descriptive' and the invisibility specs.

An ECM for it.  Start ~emacs -Q~ and setup current Org:

#+begin_src emacs-lisp
(add-to-list 'load-path "~/.emacs.d/elpa/org-9.5")
#+end_src

Visit =document.org= containing:

#+begin_src org
[[https://orgmode.org/][Org mode for Emacs]]

# Local Variables:
# org-link-descriptive: nil
# End:
#+end_src

The default value of `org-link-descriptive' is t, and after visiting 
this file, the local variable is indeed set (inspect it, and it tells 
you it is nil).  However, the links are still "descriptive", and 
`buffer-invisibility-spec' does contain `(org-link)'.  Indeed, if at 
that point, you try `org-toggle-link-display', it will fail the first 
time, but work the second one.

Possibly related threads:
https://list.orgmode.org/87pmzdhl4b.fsf@kenko.localhost.com/
https://list.orgmode.org/orgmode/87lfeqzm3a.fsf@gmail.com/

Best regards,
Gustavo.




Emacs  : GNU Emacs 27.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version 
3.24.20, cairo version 1.16.0)
of 2021-03-25
Package: Org mode version 9.5 (9.5-g0a86ad @ 
/home/gustavo/.emacs.d/elpa/org-9.5/)

current state:
==============
(setq
org-src-mode-hook '(org-src-babel-configure-edit-buffer 
org-src-mode-configure-edit-buffer)
org-link-shell-confirm-function 'yes-or-no-p
org-metadown-hook '(org-babel-pop-to-session-maybe)
org-reveal-start-hook '(org-decrypt-entry)
org-mode-hook '(#[0 "\300\301\302\303\304$\207" [add-hook 
change-major-mode-hook org-show-all append local] 5]
                 #[0 "\300\301\302\303\304$\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-archive-hook '(org-attach-archive-delete-maybe)
org-confirm-elisp-link-function 'yes-or-no-p
org-agenda-before-write-hook '(org-agenda-add-entry-text)
org-metaup-hook '(org-babel-load-in-session-maybe)
org-bibtex-headline-format-function #[257 "\300\236A\207" [:title] 3 
"\n\n(fn ENTRY)"]
org-babel-pre-tangle-hook '(save-buffer)
org-tab-first-hook '(org-babel-hide-result-toggle-maybe 
org-babel-header-arg-expand)
org-agenda-loop-over-headlines-in-active-region nil
org-occur-hook '(org-first-headline-recenter)
org-cycle-hook '(org-cycle-hide-archived-subtrees 
org-cycle-hide-drawers org-cycle-show-empty-lines
                  org-optimize-window-after-visibility-change)
org-speed-command-hook '(org-speed-command-activate 
org-babel-speed-command-activate)
org-export-before-parsing-hook '(org-attach-expand-links)
org-confirm-shell-link-function 'yes-or-no-p
org-link-parameters '(("attachment" :follow org-attach-follow :complete 
org-attach-complete-link)
		       ("id" :follow org-id-open) ("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)
		       ("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\302Q\"\207" ["news" browse-url 
                        ":"] 6 "\n\n(fn URL ARG)"])
                       ("mailto" :follow
			#[514 "\301\300\302Q\"\207" ["mailto" browse-url 
                        ":"] 6 "\n\n(fn URL ARG)"])
                       ("https" :follow
			#[514 "\301\300\302Q\"\207" ["https" browse-url 
                        ":"] 6 "\n\n(fn URL ARG)"])
                       ("http" :follow
			#[514 "\301\300\302Q\"\207" ["http" browse-url 
                        ":"] 6 "\n\n(fn URL ARG)"])
                       ("ftp" :follow
			#[514 "\301\300\302Q\"\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-link-elisp-confirm-function 'yes-or-no-p
)