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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 download)
#:use-module (ice-9 match)
#:use-module (guix derivations)
#:use-module (guix packages)
#:use-module ((guix store) #:select (derivation-path?))
#:use-module (guix utils)
#:export (url-fetch))
;;; Commentary:
;;;
;;; Produce fixed-output derivations with data fetched over HTTP or FTP.
;;;
;;; Code:
(define* (url-fetch store url hash-algo hash
#:optional name
#:key (system (%current-system)) guile)
"Return the path of a fixed-output derivation in STORE that fetches
URL (a string, or a list of strings denoting alternate URLs), 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 download))
(url-fetch ',url %output)))
(define guile-for-build
(match guile
((? package?)
(package-derivation store guile system))
((and (? string?) (? derivation-path?))
guile)
(#f ; the default
(let* ((distro (resolve-interface '(distro packages base)))
(guile (module-ref distro 'guile-final)))
(package-derivation store guile system)))))
(define file-name
(match url
((head _ ...)
(basename head))
(_
(basename url))))
(build-expression->derivation store (or name file-name) system
builder '()
#:hash-algo hash-algo
#:hash hash
#:modules '((guix build download)
(guix build utils)
(guix ftp-client))
#:guile-for-build guile-for-build))
;;; download.scm ends here
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