From mboxrd@z Thu Jan  1 00:00:00 1970
From: Florian Lindner <mailinglists@xgm.de>
Subject: Re: Default application for org-reveal
Date: Sun, 8 Jan 2017 18:25:19 +0100
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Am 07.01.2017 um 11:39 schrieb Marco Wahl:
> Hi,
> 
> Florian Lindner <mailinglists@xgm.de> writes:
> 
>> Hello,
>>
>> the Org Attach dispatcher offers a key "f" to open the attachment directory not in Emacs.
>>
>> (defun org-attach-reveal (&optional if-exists)
>>   "Show the attachment directory of the current task.
>> This will attempt to use an external program to show the directory."
>>   (interactive "P")
>>   (let ((attach-dir (org-attach-dir (not if-exists))))
>>     (and attach-dir (org-open-file attach-dir))))
>>
>> On my two systems this is the same a F, it opens in dired. xdg-open . uses dolphin to open inode/directory. How does Emacs/org determine which
>> application to use? How can I influence it?
> 
> The documentation of `org-open-file' points to variable `org-file-apps'.
> You can customize `org-file-apps'.
> 
> E.g. the entry
> 
> [INS] [DEL] Cons-cell:
>             Choice: [Value Menu] Links to a directory
>             Choice: [Value Menu] Command: firefox %s
> 
> stands for opening directories in firefox.

Ok, thanks. I've set org-file-apps like that now

org-file-apps '((system . "xdg-open %s")
                            ("\\.pdf\\'" . system)
                            (directory . system)
                            (auto-mode . emacs)))

and it seems to work.

IMHO should mailcap be deprecated in favor of xdg-open.

Best,
Florian