From mboxrd@z Thu Jan  1 00:00:00 1970
From: Vincent Legoll <vincent.legoll@gmail.com>
Subject: Re: Reverse dependencies
Date: Sat, 13 Aug 2016 13:17:31 +0200
Message-ID: <CAEwRq=oaPouH+aTbWZNe4oW8Z+sOXzAwgv0SMVO=z+rSU53YOA@mail.gmail.com>
References: <CAEwRq=qqGdiN7tQ4XsUiGLmdrTbXMjmZTWOX9+xGahhZTA4SdQ@mail.gmail.com>
	<20160716161333.GA29212@jasmine>
	<CAEwRq=p=Wp+9z13zHPdtKwWDQiaE_OgasbejEbpCF5y+19tByQ@mail.gmail.com>
	<87d1legy06.fsf@gmail.com>
	<CAEwRq=oZAtruL+COJh0_NPiN8TWoO_n8u14naUQBtayfUeJnew@mail.gmail.com>
	<CAJ=RwfZ4nwKUkkLOJjEz_0udZsJauHeBx2RpYXaWMPLkb3jikw@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Return-path: <help-guix-bounces+gcggh-help-guix=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:4830:134:3::10]:41431)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <vincent.legoll@gmail.com>) id 1bYWwZ-0007Ha-7P
	for help-guix@gnu.org; Sat, 13 Aug 2016 07:17:35 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <vincent.legoll@gmail.com>) id 1bYWwX-0003AZ-97
	for help-guix@gnu.org; Sat, 13 Aug 2016 07:17:34 -0400
Received: from mail-qt0-x234.google.com ([2607:f8b0:400d:c0d::234]:34347)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <vincent.legoll@gmail.com>) id 1bYWwX-0003AM-46
	for help-guix@gnu.org; Sat, 13 Aug 2016 07:17:33 -0400
Received: by mail-qt0-x234.google.com with SMTP id u25so4281072qtb.1
	for <help-guix@gnu.org>; Sat, 13 Aug 2016 04:17:32 -0700 (PDT)
In-Reply-To: <CAJ=RwfZ4nwKUkkLOJjEz_0udZsJauHeBx2RpYXaWMPLkb3jikw@mail.gmail.com>
List-Id: <help-guix.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/help-guix>,
	<mailto:help-guix-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/help-guix/>
List-Post: <mailto:help-guix@gnu.org>
List-Help: <mailto:help-guix-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/help-guix>,
	<mailto:help-guix-request@gnu.org?subject=subscribe>
Errors-To: help-guix-bounces+gcggh-help-guix=m.gmane.org@gnu.org
Sender: "Help-Guix" <help-guix-bounces+gcggh-help-guix=m.gmane.org@gnu.org>
To: "Thompson, David" <dthompson2@worcester.edu>
Cc: Alex Kost <alezost@gmail.com>, help-guix <help-guix@gnu.org>

Hello,

> What do you define "dependencies" to be?  Using your situation as an
> example, inkscape is *not* a dependency of the built system, but it is
> a dependency of the *derivation* that builds the system.

I don't know which exact terms to use, I just wanted to avoid pulling in
a big GUI package when I chose a bare-bones system, since I had to
compile it a few times while hydra was recovering. I always have seen
the term "reverse dependencies" used to refer to that concept.

> I'd also like to point out that you can already use 'guix gc
> --referrers /gnu/store/....-foo-1.0' to find out which store items
> depend on the one passed in.

I expected gc to mean "garbage collect" and do just that. As a newcomer
I'd never have searched there, and even then, that would not have helped :

$ guix help gc
Usage: guix gc [OPTION]... PATHS...
Invoke the garbage collector.
[...]
      --references       list the references of PATHS
  -R, --requisites       list the requisites of PATHS
      --referrers        list the referrers of PATHS

The reference manual has more detailed explanations, maybe this
should be copied in "guix help gc".

WDYT ?

-- 
Vincent Legoll