74 lines
2.7 KiB
Scheme
74 lines
2.7 KiB
Scheme
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;;; Guix --- Nix package management from Guile. -*- coding: utf-8 -*-
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;;; Copyright (C) 2012 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of Guix.
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;;;
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;;; Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (guix download)
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#:use-module (ice-9 match)
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#:use-module (guix derivations)
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#:use-module (guix packages)
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#:use-module ((guix store) #:select (derivation-path?))
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#:use-module (guix utils)
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#:export (url-fetch))
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;;; Commentary:
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;;;
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;;; Produce fixed-output derivations with data fetched over HTTP or FTP.
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;;;
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;;; Code:
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(define* (url-fetch store url hash-algo hash
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#:optional name
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#:key (system (%current-system)) guile)
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"Return the path of a fixed-output derivation in STORE that fetches
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URL (a string, or a list of strings denoting alternate URLs), which is
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expected to have hash HASH of type HASH-ALGO (a symbol). By default,
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the file name is the base name of URL; optionally, NAME can specify a
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different file name."
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(define builder
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`(begin
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(use-modules (guix build download))
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(url-fetch ',url %output)))
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(define guile-for-build
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(match guile
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((? package?)
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(package-derivation store guile system))
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((and (? string?) (? derivation-path?))
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guile)
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(#f ; the default
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(let* ((distro (resolve-interface '(distro packages base)))
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(guile (module-ref distro 'guile-final)))
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(package-derivation store guile system)))))
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(define file-name
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(match url
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((head _ ...)
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(basename head))
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(_
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(basename url))))
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(build-expression->derivation store (or name file-name) system
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builder '()
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#:hash-algo hash-algo
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#:hash hash
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#:modules '((guix build download)
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(guix build utils)
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(guix ftp-client))
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#:guile-for-build guile-for-build))
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;;; download.scm ends here
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