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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013 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 (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 '()))
(initrd menu-entry-initrd))
(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 (prologue kernel)
(format #f "
set default=~a
set timeout=~a
search.file ~a~%"
default-entry timeout kernel))
(define (bzImage)
(any (match-lambda
(($ <menu-entry> _ linux)
(package-file linux "bzImage"
#:system system)))
entries))
(define entry->text
(match-lambda
(($ <menu-entry> label linux arguments initrd)
(mlet %store-monad ((linux (package-file linux "bzImage"
#:system system))
(initrd (package-file initrd "initrd"
#:system system)))
;; XXX: Assume that INITRD is a directory containing an 'initrd' file.
(return (format #f "menuentry ~s {
linux ~a ~a
initrd ~a
}~%"
label
linux (string-join arguments) initrd))))))
(mlet %store-monad ((kernel (bzImage))
(body (sequence %store-monad
(map entry->text entries))))
(text-file "grub.cfg"
(string-append (prologue kernel)
(string-concatenate body)))))
;;; grub.scm ends here
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