As mentioned before, I use Emacs, org-roam and org-journal. In total I have about 3000 org-files and a tiny fraction of them contains org-keywords. Those files I would like to have in my org-agenda-files (so that they show up in my org-agenda). If there is no TODO or any other org-keyword left, these files should be automatically removed.

This is what I came up with: My solution uses rg (ripgrep) and “~/Documents/GitHub/org/dotfiles/agenda_files.el” is my “org-agenda-files”-file (replace this with yours). Put the snippet below in your .emacs and whenever you save a buffer, “agenda_files.el” is updated. rg is really fast and this causes no tangible delay in my setup.

(defun lt/auto-add-org-agenda ()
  "Automatically add org-files to org-agenda-files or remove them, based on whether or not they contain org-keywords."
  (interactive)
  (with-temp-file org-agenda-files (insert (shell-command-to-string (concat "rg -e '\\*.(TODO|NEXT|WAITING|RECREATION|PROJECT).[^%]' -g \"*.org\" -l " org-directory)))))
  (add-hook 'org-agenda-mode-hook 'lt/auto-add-org-agenda)

2023_02_21-1211: Fixed a stupid typo. 2023_02_24-1445: Corrected add-hook. 2023_02_27-1926: Found a much better hook. Now org-agenda-files is only updated right before the agenda is built. 2023_03_01-0825: If you are working with org-notifications you have to replace org-agenda-files (in the line starting with “(with-temp-file… )” ) with the file specified by org-agenda-files.

There is a lot of useful information flying around in Mastodon. Some of it I would like to archive in my text-based database (i.e. org-roam). To access Mastodon inside Emacs I use mastodon.el. This little hack copies an org-ified version of the “toot” at point in the mastodon.el timeline to the clipboard. It uses the URL of said toot to pull it’s title from the web (via org-web-tools) and creates an org-link as the heading/context for the toot. The content of the toot is then pasted between #+begin_quote and #+end_quote. I also added a keybinding (“j”) for this to work inside mastodon.el.

Caveats: For boosted toots you need to focus on the original toot first (via “T”). Line breaks are still a bit of a mess.

((defun lt/mastodon-toot--copy-orgified-toot-to-clipboard ()
          "Copy org-ified toot at point to clipboard."
            (interactive)
            (let* ((toot (mastodon-tl--property 'toot-json)))
            (when toot
              (let* 
              ((url (alist-get 'url toot))
               (content (mastodon-tl--content toot))
               (html (org-web-tools--get-url url))
               (title (org-web-tools--html-title html)))       
  (with-temp-buffer
     (emacs-lisp-mode)
     (insert content)
     (fill-region (point-min) (point-max))
     (let* ((content (buffer-substring (point-min) (point-max)))              
            (complete-toot (concat "\[\[" url "\]\[" title "\]\]\n\n" 
               "#+begin_quote\n\n" content "\n#+end_quote\n\n")))
            (kill-new complete-toot)
(message "Copied: '%s' to the clipboard." title)))))))
(define-key mastodon-mode-map (kbd "j") 'lt/mastodon-toot--copy-orgified-toot-to-clipboard)

Update 2023_02_04: I played around with this setup and decided to directly paste the toot into an org-journal entry. The following code will add that functionality to the keybinding “J” (when in Mastodon.el).

(defun lt/mastodon-toot--copy-orgified-toot-to-org-journal ()
          "Copy org-ified toot at point to org-journal."
            (interactive)
            (lt/mastodon-toot--copy-orgified-toot-to-clipboard)
            (org-journal-new-entry nil)
            (org-yank))
 (define-key mastodon-mode-map (kbd "J") 'lt/mastodon-toot--copy-orgified-toot-to-org-journal)

Btw: If you replace (org-journal-new-entry nil) in the second snipped with (org-capture nil "xyz") (whereby xyz stands for a template key) this should also work with org-capture.

Update 2023_02_11: Added a correction for the arbitary line breaks (via fill-region in a temporary buffer).