Joseph Turner <jos...@breatheoutbreathe.in> writes:

> My Emacs setup broke today due to the presence of a lockfile inside
> "~/.local/share/org/todo".  I use EXWM, and I show org-agenda on startup:
>
> (add-hook 'after-init-hook
>             (lambda () (org-agenda nil "t")))
> (setq initial-buffer-choice (lambda () (get-buffer "*Org Agenda*")))
>
> org-agenda-files contained a non-existent file, so org-check-agenda-file
> attempted to prompt me.  For some reason (maybe EXWM didn't fully load),
> Emacs simply hung without prompting, leaving me with a black screen.

You may consider reporting the hang to Emacs or EXWM bug tracker.

> My configuration contains the equivalent of
>
> (setopt org-agenda-files
>        (directory-files-recursively "~/.local/share/org/todo" ".org$"))

I'd recommend using a different approach - use org-agenda-file-regexp
instead of ".org$"; or use #'file-directory-p as predicate - Org mode
then select Org files inside all the listed directories by itself.

> The attached patch silently removes lockfiles from org-agenda-files.

> -  "Make sure FILE exists.  If not, ask user what to do."
> +  "Make sure FILE exists.  If not, ask user what to do.
> +Automatically exclude lockfiles."
>    (unless (file-exists-p file)
> +    (when (string-match-p (rx bos ".#") file) ; Exclude lockfiles
> +      (org-remove-file file)
> +      (throw 'nextfile t))

I feel slightly reluctant about this patch:

1. You are only working around the actual problem with agenda file being
   deleted from disk while Emacs is loading. So, the patch is not
   solving a real Org mode problem - Org mode prompting about
   non-existing file is not wrong; your bug has nothing to do with Org
   mode itself.

2. In theory, there might be users with actual Org files starting from
   ".#" for whatever reason. The probability is not high, but if users
   choose to set org-agenda-files directly, file-by-file, that's a
   choice we should better respect in order to not create a blocker.

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
Learn more about Org mode at <https://orgmode.org/>.
Support Org development at <https://liberapay.com/org-mode>,
or support my work at <https://liberapay.com/yantar92>

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