From mboxrd@z Thu Jan  1 00:00:00 1970
From: Federico Beffa <beffa@ieee.org>
Subject: Re: propagating inputs in ghc-* packages
Date: Sun, 2 Oct 2016 17:42:54 +0200
Message-ID: <CAKrPhPMN40BESFRVJHKqQEmVJX9vmw+vjRm1Ng0YG4zm5iafHw@mail.gmail.com>
References: <CAKrPhPNrzBpYFMrtF6jBsLUtVYa0rPmHxx5p1k5EHknjxiW+KQ@mail.gmail.com>
	<871t00v7fy.fsf@elephly.net>
	<CAKrPhPOstd4ALNv-Eqzts3psHAd=+i33t-rrTQT-0oYQgb9HwQ@mail.gmail.com>
	<87twcv8jou.fsf@elephly.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: quoted-printable
Return-path: <guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org>
Received: from eggs.gnu.org ([2001:4830:134:3::10]:55653)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <federico.beffa@gmail.com>) id 1bqium-0000Jf-9a
	for guix-devel@gnu.org; Sun, 02 Oct 2016 11:42:57 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <federico.beffa@gmail.com>) id 1bqiul-0004Or-93
	for guix-devel@gnu.org; Sun, 02 Oct 2016 11:42:56 -0400
Received: from mail-ua0-x236.google.com ([2607:f8b0:400c:c08::236]:35032)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <federico.beffa@gmail.com>) id 1bqiul-0004OY-4k
	for guix-devel@gnu.org; Sun, 02 Oct 2016 11:42:55 -0400
Received: by mail-ua0-x236.google.com with SMTP id q42so131887029uaq.2
	for <guix-devel@gnu.org>; Sun, 02 Oct 2016 08:42:54 -0700 (PDT)
In-Reply-To: <87twcv8jou.fsf@elephly.net>
List-Id: "Development of GNU Guix and the GNU System distribution."
	<guix-devel.gnu.org>
List-Unsubscribe: <https://lists.gnu.org/mailman/options/guix-devel>,
	<mailto:guix-devel-request@gnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/archive/html/guix-devel/>
List-Post: <mailto:guix-devel@gnu.org>
List-Help: <mailto:guix-devel-request@gnu.org?subject=help>
List-Subscribe: <https://lists.gnu.org/mailman/listinfo/guix-devel>,
	<mailto:guix-devel-request@gnu.org?subject=subscribe>
Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org
Sender: "Guix-devel" <guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org>
To: Ricardo Wurmus <rekado@elephly.net>
Cc: Guix-devel <guix-devel@gnu.org>

On Sun, Oct 2, 2016 at 6:21 AM, Ricardo Wurmus <rekado@elephly.net> wrote:
>> That sounds great! Just to be sure: you are saying that if you install
>> any library (call it A) and the GHC compiler into your profile then you
>> are able to compile your program (making use of library A) without
>> also having to manually install any input of library A?
>
> This seems to be the case.  Here is an example ghci session in which I=E2=
=80=99m
> using =E2=80=9Cghc-pandoc=E2=80=9D as a library without having to install=
 any of the
> numerous inputs to =E2=80=9Cghc-pandoc=E2=80=9D (and their inputs):
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ./pre-inst-env guix environment --ad-hoc ghc ghc-pandoc
> [=E2=80=A6]
> rekado in guix-wip [env]: ghci
> GHCi, version 7.10.2: http://www.haskell.org/ghc/  :? for help
> Prelude> import Text.Pandoc
> Prelude Text.Pandoc> readMarkdown def "Hello"
> Right (Pandoc (Meta {unMeta =3D fromList []}) [Para [Str "Hello"]])
> Prelude Text.Pandoc> :q
> Leaving GHCi.
> rekado in guix-wip [env]:
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Nice. Thanks for checking.