gnu/bootloader/extlinux.scm

   1 ;;; GNU Guix --- Functional package management for GNU
   2 ;;; Copyright © 2017 David Craven <david@craven.ch>
   3 ;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
   4 ;;;
   5 ;;; This file is part of GNU Guix.
   6 ;;;
   7 ;;; GNU Guix is free software; you can redistribute it and/or modify it
   8 ;;; under the terms of the GNU General Public License as published by
   9 ;;; the Free Software Foundation; either version 3 of the License, or (at
  10 ;;; your option) any later version.
  11 ;;;
  12 ;;; GNU Guix is distributed in the hope that it will be useful, but
  13 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;;; GNU General Public License for more details.
  16 ;;;
  17 ;;; You should have received a copy of the GNU General Public License
  18 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 (define-module (gnu bootloader extlinux)
  21   #:use-module (gnu bootloader)
  22   #:use-module (gnu packages bootloaders)
  23   #:use-module (guix gexp)
  24   #:use-module (guix utils)
  25   #:export (extlinux-bootloader
  26             extlinux-bootloader-gpt))
  27
  28 (define* (extlinux-configuration-file config entries
  29                                       #:key
  30                                       (system (%current-system))
  31                                       (old-entries '()))
  32   "Return the U-Boot configuration file corresponding to CONFIG, a
  33 <u-boot-configuration> object, and where the store is available at STORE-FS, a
  34 <file-system> object.  OLD-ENTRIES is taken to be a list of menu entries
  35 corresponding to old generations of the system."
  36
  37   (define all-entries
  38     (append entries (bootloader-configuration-menu-entries config)))
  39
  40   (define (menu-entry->gexp entry)
  41     (let ((label (menu-entry-label entry))
  42           (kernel (menu-entry-linux entry))
  43           (kernel-arguments (menu-entry-linux-arguments entry))
  44           (initrd (menu-entry-initrd entry)))
  45       #~(format port "LABEL ~a
  46   MENU LABEL ~a
  47   KERNEL ~a
  48   FDTDIR ~a/lib/dtbs
  49   INITRD ~a
  50   APPEND ~a
  51 ~%"
  52                 #$label #$label
  53                 #$kernel (dirname #$kernel) #$initrd
  54                 (string-join (list #$@kernel-arguments)))))
  55
  56   (define builder
  57     #~(call-with-output-file #$output
  58         (lambda (port)
  59           (let ((timeout #$(bootloader-configuration-timeout config)))
  60             (format port "# This file was generated from your Guix configuration.  Any changes
  61 # will be lost upon reconfiguration.
  62 UI menu.c32
  63 MENU TITLE GNU Guix Boot Options
  64 PROMPT ~a
  65 TIMEOUT ~a~%"
  66                     (if (> timeout 0) 1 0)
  67                     ;; timeout is expressed in 1/10s of seconds.
  68                     (* 10 timeout))
  69             #$@(map menu-entry->gexp all-entries)
  70
  71             #$@(if (pair? old-entries)
  72                    #~((format port "~%")
  73                       #$@(map menu-entry->gexp old-entries)
  74                       (format port "~%"))
  75                    #~())))))
  76
  77   (computed-file "extlinux.conf" builder))
  78
  79
  80 \f
  81
  82 ;;;
  83 ;;; Install procedures.
  84 ;;;
  85
  86 (define (install-extlinux mbr)
  87   #~(lambda (bootloader device mount-point)
  88       (let ((extlinux (string-append bootloader "/sbin/extlinux"))
  89             (install-dir (string-append mount-point "/boot/extlinux"))
  90             (syslinux-dir (string-append bootloader "/share/syslinux")))
  91         (for-each (lambda (file)
  92                     (install-file file install-dir))
  93                   (find-files syslinux-dir "\\.c32$"))
  94         (invoke/quiet extlinux "--install" install-dir)
  95         (write-file-on-device (string-append syslinux-dir "/" #$mbr)
  96                               440 device 0))))
  97
  98 (define install-extlinux-mbr
  99   (install-extlinux "mbr.bin"))
 100
 101 (define install-extlinux-gpt
 102   (install-extlinux "gptmbr.bin"))
 103
 104 \f
 105
 106 ;;;
 107 ;;; Bootloader definitions.
 108 ;;;
 109
 110 (define extlinux-bootloader
 111   (bootloader
 112    (name 'extlinux)
 113    (package syslinux)
 114    (installer install-extlinux-mbr)
 115    (configuration-file "/boot/extlinux/extlinux.conf")
 116    (configuration-file-generator extlinux-configuration-file)))
 117
 118 (define extlinux-bootloader-gpt
 119   (bootloader
 120    (inherit extlinux-bootloader)
 121    (installer install-extlinux-gpt)))