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;;; Guix --- Nix package management from Guile. -*- coding: utf-8 -*-
;;; Copyright (C) 2012 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of Guix.
;;;
;;; 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.
;;;
;;; 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 Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (guix http)
#:use-module (guix derivations)
#:use-module (guix utils)
#:export (http-fetch))
;;; Commentary:
;;;
;;; Produce fixed-output derivations with data fetched over HTTP.
;;;
;;; Code:
(define* (http-fetch store url hash-algo hash
#:optional name
#:key (system (%current-system)))
"Return the path of a fixed-output derivation in STORE that fetches URL,
which is expected to have hash HASH of type HASH-ALGO (a symbol). By
default, the file name is the base name of URL; optionally, NAME can specify
a different file name."
(define builder
`(begin
(use-modules (guix build http))
(http-fetch ,url %output)))
(build-expression->derivation store (or name (basename url)) system
builder '()
#:hash-algo hash-algo
#:hash hash
#:modules '((guix build http))))
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