From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jack Kamm <jackkamm@gmail.com>
Subject: Re: Bug: R src blocks fail to produce link to graphics file [9.3
 org-plus-contrib-20200127]
Date: Mon, 27 Jan 2020 17:13:35 -0800
Message-ID: <87ftg0e62o.fsf@gmail.com>
References: <38232967-8656-40be-89de-30a7fd180838@www.fastmail.com>
 <874kwgg64g.fsf@gmail.com>
 <38d7ec9f-7e36-4b82-b1cf-03701b66eb1f@www.fastmail.com>
Mime-Version: 1.0
Content-Type: text/plain
Return-path: <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane-mx.org@gnu.org>
Received: from eggs.gnu.org ([2001:470:142:3::10]:53175)
 by lists.gnu.org with esmtp (Exim 4.90_1)
 (envelope-from <jackkamm@gmail.com>) id 1iwFRk-000737-H0
 for emacs-orgmode@gnu.org; Mon, 27 Jan 2020 20:13:41 -0500
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
 (envelope-from <jackkamm@gmail.com>) id 1iwFRj-0001b3-GD
 for emacs-orgmode@gnu.org; Mon, 27 Jan 2020 20:13:40 -0500
Received: from mail-pl1-x629.google.com ([2607:f8b0:4864:20::629]:45822)
 by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16)
 (Exim 4.71) (envelope-from <jackkamm@gmail.com>) id 1iwFRj-0001ae-9D
 for emacs-orgmode@gnu.org; Mon, 27 Jan 2020 20:13:39 -0500
Received: by mail-pl1-x629.google.com with SMTP id b22so4413996pls.12
 for <emacs-orgmode@gnu.org>; Mon, 27 Jan 2020 17:13:39 -0800 (PST)
In-Reply-To: <38d7ec9f-7e36-4b82-b1cf-03701b66eb1f@www.fastmail.com>
List-Id: "General discussions about Org-mode." <emacs-orgmode.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/emacs-orgmode>,
 <mailto:emacs-orgmode-request@gnu.org?subject=unsubscribe>
List-Archive: <https://lists.gnu.org/archive/html/emacs-orgmode>
List-Post: <mailto:emacs-orgmode@gnu.org>
List-Help: <mailto:emacs-orgmode-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/emacs-orgmode>,
 <mailto:emacs-orgmode-request@gnu.org?subject=subscribe>
Errors-To: emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane-mx.org@gnu.org
Sender: "Emacs-orgmode"
 <emacs-orgmode-bounces+geo-emacs-orgmode=m.gmane-mx.org@gnu.org>
To: Tyler Smith <tyler@plantarum.ca>, Emacs Org-Mode Help <emacs-orgmode@gnu.org>

> Is the rationale explained anywhere? After a bit of poking around, it looks like using the `:file` flag without a `file` argument to results doesn't do anything (no file is created), nor does the reverse. That is, unless you use both the `file` argument and the `:file` option, nothing happens. Is there a situation where you can use `:file` to do something that doesn't require a `file` argument to `:results`?

The specific commit where it happened was
26ed66b23335eb389f1f2859e409f46f66279e15, which says:

"Deducing the results from some other arguments is not obvious.
Moreover, it prevents users from setting, e.g., :file-ext, in a node
property, as every block would then create a file."

The commit also links to this thread:
http://lists.gnu.org/r/emacs-orgmode/2018-05/msg00469.html

I wasn't involved in that discussion, but I think the idea is that you
could create a subtree with many named source blocks each creating a PNG
file, set the :file-ext parameter at the subtree level, and have the
file names auto-created from the source block names.

> The documentation for ob-R is now incorrect:
>
>   https://orgmode.org/worg/org-contrib/babel/languages/ob-doc-R.html

Yes, also that page could use some other updates, e.g. there are some
dead links in there.