Setup for sharing org-mode agenda with google calendar

Setup for sharing org-mode agenda with google calendar (and mobile devices)

Note: this is only one-directional from org-mode to google calendar.

First step: setup org-mode to export all the agenda-files to an ics file.

Put this into the .emacs file (I save the agenda to dropbox).

(setq org-icalendar-combined-agenda-file "~/Dropbox/orgfiles/org.ics")
(setq org-icalendar-include-todo '(all))
(setq org-icalendar-use-scheduled '(event-if-todo event-if-not-todo)) 
(setq org-icalendar-use-deadline '(event-if-todo event-if-not-todo))

;; this hook saves an ics file once an org-buffer is saved
(defun my-icalendar-agenda-export()
    (if (string= (file-name-extension (buffer-file-name)) "org")
              (org-icalendar-combine-agenda-files)) 
      )
(add-hook 'after-save-hook 'my-icalendar-agenda-export)

Second: share in dropbox

In your dropbox folder on the web, click on share and "get link".

This links looks like this: https://www.dropbox.com/s/randomletters/org.ics

Replace www with dl such that it looks like this: https://dl.dropbox.com/s/randomletters/org.ics

Third: add by url in google-calendar

This is unfortunately not as straight-forward as I would like to belive. Google calendar allows to "Add by url" (in the left panel, under "Other calendars"). However, with dropbox-links this fails with some warning about "robots.txt".

There is the following workaround (thanks to this discussion). You have to create a pipe, then abbreviate the url with tinyurl and finally import the resulting link into google-calendar (works fine this time).

Last: subscribe to the new google calendar on your devices

e.g., mobile phone, mac, thunderbird (lightning),...