From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: How to install a package in guile
Date: Tue, 25 Jul 2017 23:14:24 +0200
Message-ID: <87y3rcb4nj.fsf@gnu.org>
References: <87mv7s3agv.fsf@163.com>
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In-Reply-To: <87mv7s3agv.fsf@163.com> (Feng Shu's message of "Tue, 25 Jul 2017
	21:36:00 +0800")
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To: Feng Shu <tumashu@163.com>
Cc: guix-devel <guix-devel@gnu.org>

Hi,

"Feng Shu" <tumashu@163.com> skribis:

> I use the following exp to build a new version you-get
>
> #+BEGIN_COMMENT
> scheme@(guile-user)> ,run-in-store (build-package you-get #:use-substitut=
es? #t #:dry-run? #f)
> #+END_COMMENT
>
> How to install this new vesion of you-get in guile?

You=E2=80=99d first need to build a profile that contains you-get, using th=
e API
in (guix profiles):

--8<---------------cut here---------------start------------->8---
scheme@(guile-user)> ,use(guix)
scheme@(guile-user)> ,use(gnu)
scheme@(guile-user)> ,use(guix profiles)
scheme@(guile-user)> (packages->manifest (list (specification->package "you=
-get")))
$13 =3D #<<manifest> entries: (#<<manifest-entry> name: "you-get" version: =
"0.4.775" output: "out" item: #<package you-get@0.4.775 gnu/packages/video.=
scm:1239 1529d80> dependencies: () search-paths: () parent: #<promise #<pro=
cedure 7feced850c18 at guix/profiles.scm:276:48 ()>>>)>
scheme@(guile-user)> ,run-in-store (profile-derivation $13)
=E2=80=A6
--8<---------------cut here---------------end--------------->8---

The rest (setting up the symlink) is a little less convenient though.
See (guix scripts package) or the equivalent Emacs-Guix code for how
this works.

HTH!

Ludo=E2=80=99.