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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014 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 (gnu system grub)
#:use-module (guix store)
#:use-module (guix packages)
#:use-module (guix derivations)
#:use-module (guix records)
#:use-module (guix monads)
#:use-module (guix gexp)
#:use-module (ice-9 match)
#:use-module (srfi srfi-1)
#:export (menu-entry
menu-entry?
grub-configuration-file))
;;; Commentary:
;;;
;;; Configuration of GNU GRUB.
;;;
;;; Code:
(define-record-type* <menu-entry>
menu-entry make-menu-entry
menu-entry?
(label menu-entry-label)
(linux menu-entry-linux)
(linux-arguments menu-entry-linux-arguments
(default '())) ; list of string-valued gexps
(initrd menu-entry-initrd)) ; file name of the initrd as a gexp
(define* (grub-configuration-file entries
#:key (default-entry 1) (timeout 5)
(system (%current-system)))
"Return the GRUB configuration file for ENTRIES, a list of
<menu-entry> objects, defaulting to DEFAULT-ENTRY and with the given TIMEOUT."
(define entry->gexp
(match-lambda
(($ <menu-entry> label linux arguments initrd)
#~(format port "menuentry ~s {
linux ~a/bzImage ~a
initrd ~a
}~%"
#$label
#$linux (string-join (list #$@arguments))
#$initrd))))
(define builder
#~(call-with-output-file #$output
(lambda (port)
(format port "
set default=~a
set timeout=~a
search.file ~a/bzImage~%"
#$default-entry #$timeout
#$(any (match-lambda
(($ <menu-entry> _ linux)
linux))
entries))
#$@(map entry->gexp entries))))
(gexp->derivation "grub.cfg" builder))
;;; grub.scm ends here
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