59 lines
2.1 KiB
Scheme
59 lines
2.1 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
|
;;; Copyright © 2012 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/>.
|
|
|
|
;;;
|
|
;;; Download a binary file from an external source.
|
|
;;;
|
|
|
|
(use-modules (ice-9 match)
|
|
(web uri)
|
|
(web client)
|
|
(rnrs io ports)
|
|
(srfi srfi-11)
|
|
(guix utils))
|
|
|
|
(define %url-base
|
|
"http://www.fdn.fr/~lcourtes/software/guix/packages")
|
|
|
|
(define (file-name->uri file)
|
|
"Return the URI for FILE."
|
|
(match (string-tokenize file (char-set-complement (char-set #\/)))
|
|
((_ ... system basename)
|
|
(string->uri (string-append %url-base "/" system
|
|
"/20121115/" basename)))))
|
|
|
|
(match (command-line)
|
|
((_ file expected-hash)
|
|
(let ((uri (file-name->uri file)))
|
|
(format #t "downloading file `~a' from `~a'...~%"
|
|
file (uri->string uri))
|
|
(let*-values (((resp data) (http-get uri #:decode-body? #f))
|
|
((hash) (bytevector->base16-string (sha256 data)))
|
|
((part) (string-append file ".part")))
|
|
(if (string=? expected-hash hash)
|
|
(begin
|
|
(call-with-output-file part
|
|
(lambda (port)
|
|
(put-bytevector port data)))
|
|
(rename-file part file))
|
|
(begin
|
|
(format (current-error-port)
|
|
"file at `~a' has SHA256 ~a; expected ~a~%"
|
|
(uri->string uri) hash expected-hash)
|
|
(exit 1)))))))
|