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From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Bags
Date: Thu, 02 Oct 2014 14:33:53 +0200
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To: Guix-devel <Guix-devel@gnu.org>

Hello,

I=E2=80=99ve pushed a new branch, =E2=80=98wip-bags=E2=80=99, which changes=
 the way
build systems work.  Basically, it introduces an intermediate
representation between packages and derivations, called =E2=80=9Cbags.=E2=
=80=9D

The main difference between a bag and a package is that a bag lists all
the inputs of the build process, including the =E2=80=9Cimplicit inputs=E2=
=80=9D added
by the build system.

This simplifies the code and should unlock nifty features like =E2=80=98guix
environment=E2=80=99 and =E2=80=9Cgrafts=E2=80=9D (a trick for faster secur=
ity updates; more on
that later.)

Comments welcome!

Ludo=E2=80=99.