-*- mode: org -*-

[[https://www.gnu.org/software/guix/][GNU Guix]] (IPA: /ɡiːks/) is a purely functional package manager, and
associated free software distribution, for the [[https://www.gnu.org/gnu/gnu.html][GNU system]].  In addition
to standard package management features, Guix supports transactional
upgrades and roll-backs, unprivileged package management, per-user
profiles, and garbage collection.

It provides [[https://www.gnu.org/software/guile/][Guile]] Scheme APIs, including a high-level embedded
domain-specific languages (EDSLs) to describe how packages are to be
built and composed.

GNU Guix can be used on top of an already-installed GNU/Linux distribution, or
it can be used standalone (we call that “Guix System”).

Guix is based on the [[https://nixos.org/nix/][Nix]] package manager.


* Requirements

If you are building Guix from source, please see the manual for build
instructions and requirements, either by running:

  info -f doc/guix.info "Requirements"

or by checking the [[https://guix.gnu.org/manual/en/html_node/Requirements.html][web copy of the manual]].

* Installation

See the manual for the installation instructions, either by running

  info -f doc/guix.info "Installation"

or by checking the [[https://guix.gnu.org/manual/en/html_node/Installation.html][web copy of the manual]].

* Building from Git

For information on building Guix from a Git checkout, please see the relevant
section in the manual, either by running

  info -f doc/guix.info "Building from Git"

or by checking the [[https://guix.gnu.org/manual/en/html_node/Building-from-Git.html][web_copy of the manual]].

* How It Works

Guix does the high-level preparation of a /derivation/.  A derivation is
the promise of a build; it is stored as a text file under
=/gnu/store/xxx.drv=.  The (guix derivations) module provides the
`derivation' primitive, as well as higher-level wrappers such as
`build-expression->derivation'.

Guix does remote procedure calls (RPC;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 David Thompson <davet@gnu.org>
;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
;;; Copyright © 2021 Sarah Morgensen <iskarian@mgsn.dev>
;;; Copyright © 2022 Taiju HIGASHI <higashi@taiju.info>
;;; Copyright © 2023 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (test-gem)
  #:use-module (guix import gem)
  #:use-module (guix upstream)
  #:use-module ((guix download) #:select (url-fetch))
  #:use-module ((guix build-system ruby) #:select (rubygems-uri))
  #:use-module (guix base32)
  #:use-module (gcrypt hash)
  #:use-module (guix tests)
  #:use-module ((guix build utils) #:select (delete-file-recursively))
  #:use-module (srfi srfi-64)
  #:use-module (ice-9 match))

(define test-foo-json
  "{
  \"name\": \"foo\",
  \"version\": \"1.0.0\",
  \"sha\": \"f3676eafca9987cb5fe263df1edf2538bf6dafc712b30e17be3543a9680547a8\",
  \"info\": \"A cool gem\",
  \"homepage_uri\": \"https://example.com\",
  \"dependencies\": {
    \"runtime\": [
      { \"name\": \"bundler\" },
      { \"name\": \"bar\" }
    ]
  },
  \"licenses\": [\"MIT\", \"Apache 2.0\"]
}")

(define test-foo-v2-json
  "{
  \"name\": \"foo\",
  \"version\": \"2.0.0\",
  \"sha\": \"f3676eafca9987cb5fe263df1edf2538bf6dafc712b30e17be3543a9680547a8\",
  \"info\": \"A cool gem\",
  \"homepage_uri\": \"https://example.com\",
  \"dependencies\": {
    \"runtime\": [
      { \"name\": \"bundler\" },
      { \"name\": \"bar\" }
    ]
  },
  \"licenses\": [\"MIT\", \"Apache 2.0\"]
}")

(define test-bar-json
  "{
  \"name\": \"bar\",
  \"version\": \"1.0.0\",
  \"sha\": \"f3676eafca9987cb5fe263df