576 lines
22 KiB
Scheme
576 lines
22 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2016 Chris Marusich <cmmarusich@gmail.com>
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;;; Copyright © 2017 Leo Famulari <leo@famulari.name>
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;;; Copyright © 2017, 2020 Mathieu Othacehe <m.othacehe@gmail.com>
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;;; Copyright © 2019, 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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;;; Copyright © 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU 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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;;; GNU 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (gnu bootloader grub)
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#:use-module (guix records)
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#:use-module ((guix utils) #:select (%current-system))
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#:use-module (guix gexp)
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#:use-module (gnu artwork)
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#:use-module (gnu bootloader)
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#:use-module (gnu system uuid)
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#:use-module (gnu system file-systems)
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#:use-module (gnu system keyboard)
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#:use-module (gnu packages bootloaders)
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#:autoload (gnu packages gtk) (guile-cairo guile-rsvg)
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#:autoload (gnu packages xorg) (xkeyboard-config)
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#:use-module (ice-9 match)
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#:use-module (ice-9 regex)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-2)
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#:export (grub-theme
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grub-theme?
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grub-theme-image
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grub-theme-resolution
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grub-theme-color-normal
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grub-theme-color-highlight
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grub-theme-gfxmode
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grub-bootloader
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grub-efi-bootloader
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grub-mkrescue-bootloader
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grub-minimal-bootloader
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grub-configuration))
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;;; Commentary:
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;;;
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;;; Configuration of GNU GRUB.
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;;;
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;;; Code:
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(define* (normalize-file file mount-point store-directory-prefix)
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"Strip MOUNT-POINT and prepend STORE-DIRECTORY-PREFIX, if any, to FILE, a
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G-expression or other lowerable object denoting a file name."
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(define (strip-mount-point mount-point file)
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(if mount-point
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(if (string=? mount-point "/")
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file
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#~(let ((file #$file))
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(if (string-prefix? #$mount-point file)
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(substring #$file #$(string-length mount-point))
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file)))
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file))
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(define (prepend-store-directory-prefix store-directory-prefix file)
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(if store-directory-prefix
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#~(string-append #$store-directory-prefix #$file)
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file))
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(prepend-store-directory-prefix store-directory-prefix
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(strip-mount-point mount-point file)))
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(define-record-type* <grub-theme>
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;; Default theme contributed by Felipe López.
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grub-theme make-grub-theme
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grub-theme?
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(image grub-theme-image
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(default (file-append %artwork-repository
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"/grub/GuixSD-fully-black-4-3.svg")))
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(resolution grub-theme-resolution
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(default '(1024 . 768)))
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(color-normal grub-theme-color-normal
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(default '((fg . light-gray) (bg . black))))
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(color-highlight grub-theme-color-highlight
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(default '((fg . yellow) (bg . black))))
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(gfxmode grub-theme-gfxmode
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(default '("auto")))) ;list of string
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;;;
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;;; Background image & themes.
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;;;
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(define (bootloader-theme config)
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"Return user defined theme in CONFIG if defined or a default theme
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otherwise."
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(or (bootloader-configuration-theme config) (grub-theme)))
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(define* (image->png image #:key width height)
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"Build a PNG of HEIGHT x WIDTH from IMAGE if its file suffix is \".svg\".
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Otherwise the picture in IMAGE is just copied."
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(computed-file "grub-image.png"
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(with-imported-modules '((gnu build svg))
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(with-extensions (list guile-rsvg guile-cairo)
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#~(if (string-suffix? ".svg" #+image)
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(begin
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(use-modules (gnu build svg))
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(svg->png #+image #$output
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#:width #$width
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#:height #$height))
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(copy-file #+image #$output))))))
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(define* (grub-background-image config)
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"Return the GRUB background image defined in CONFIG or #f if none was found.
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If the suffix of the image file is \".svg\", then it is converted into a PNG
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file with the resolution provided in CONFIG."
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(let* ((theme (bootloader-theme config))
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(image (grub-theme-image theme)))
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(and image
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(match (grub-theme-resolution theme)
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(((? number? width) . (? number? height))
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(image->png image #:width width #:height height))
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(_ #f)))))
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(define* (eye-candy config store-device store-mount-point
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#:key store-directory-prefix system port)
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"Return a gexp that writes to PORT (a port-valued gexp) the 'grub.cfg' part
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concerned with graphics mode, background images, colors, and all that.
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STORE-DEVICE designates the device holding the store, and STORE-MOUNT-POINT is
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its mount point; these are used to determine where the background image and
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fonts must be searched for. SYSTEM must be the target system string---e.g.,
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\"x86_64-linux\". STORE-DIRECTORY-PREFIX is a directory prefix to prepend to
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any store file name."
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(define setup-gfxterm-body
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(let ((gfxmode
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(or (and-let* ((theme (bootloader-configuration-theme config))
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(gfxmode (grub-theme-gfxmode theme)))
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(string-join gfxmode ";"))
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"auto")))
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;; Intel and EFI systems need to be switched into graphics mode, whereas
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;; most other modern architectures have no other mode and therefore
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;; don't need to be switched.
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;; XXX: Do we really need to restrict to x86 systems? We could imitate
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;; what the GRUB default configuration does and decide based on whether
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;; a user provided 'gfxterm' in the terminal-outputs field of their
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;; bootloader-configuration record.
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(if (string-match "^(x86_64|i[3-6]86)-" system)
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(format #f "
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set gfxmode=~a
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insmod all_video
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insmod gfxterm~%" gfxmode)
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"")))
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(define (setup-gfxterm config font-file)
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(if (memq 'gfxterm (bootloader-configuration-terminal-outputs config))
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#~(format #f "if loadfont ~a; then
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setup_gfxterm
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fi~%" #+font-file)
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""))
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(define (theme-colors type)
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(let* ((theme (bootloader-theme config))
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(colors (type theme)))
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(string-append (symbol->string (assoc-ref colors 'fg)) "/"
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(symbol->string (assoc-ref colors 'bg)))))
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(define font-file
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(normalize-file (file-append grub "/share/grub/unicode.pf2")
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store-mount-point
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store-directory-prefix))
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(define image
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(normalize-file (grub-background-image config)
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store-mount-point
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store-directory-prefix))
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(and image
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#~(format #$port "
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function setup_gfxterm {~a}
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# Set 'root' to the partition that contains /gnu/store.
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~a
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~a
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~a
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insmod png
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if background_image ~a; then
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set color_normal=~a
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set color_highlight=~a
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else
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set menu_color_normal=cyan/blue
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set menu_color_highlight=white/blue
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fi~%"
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#$setup-gfxterm-body
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#$(grub-root-search store-device font-file)
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#$(setup-gfxterm config font-file)
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#$(grub-setup-io config)
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#$image
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#$(theme-colors grub-theme-color-normal)
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#$(theme-colors grub-theme-color-highlight))))
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;;;
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;;; Configuration file.
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;;;
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(define* (keyboard-layout-file layout
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#:key
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(grub grub))
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"Process the X keyboard layout description LAYOUT, a <keyboard-layout> record,
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and return a file in the format for GRUB keymaps. LAYOUT must be present in
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the 'share/X11/xkb/symbols/' directory of 'xkeyboard-config'."
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(define builder
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(with-imported-modules '((guix build utils))
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#~(begin
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(use-modules (guix build utils))
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;; 'grub-kbdcomp' passes all its arguments but '-o' to 'ckbcomp'
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;; (from the 'console-setup' package).
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(invoke #+(file-append grub "/bin/grub-mklayout")
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"-i" #+(keyboard-layout->console-keymap layout)
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"-o" #$output))))
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(computed-file (string-append "grub-keymap."
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(string-map (match-lambda
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(#\, #\-)
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(chr chr))
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(keyboard-layout-name layout)))
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builder))
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(define (grub-setup-io config)
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"Return GRUB commands to configure the input / output interfaces. The result
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is a string that can be inserted in grub.cfg."
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(let* ((symbols->string (lambda (list)
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(string-join (map symbol->string list) " ")))
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(outputs (bootloader-configuration-terminal-outputs config))
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(inputs (bootloader-configuration-terminal-inputs config))
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(unit (bootloader-configuration-serial-unit config))
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(speed (bootloader-configuration-serial-speed config))
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;; Respectively, GRUB_TERMINAL_OUTPUT and GRUB_TERMINAL_INPUT,
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;; as documented in GRUB manual section "Simple Configuration
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;; Handling".
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(valid-outputs '(console serial serial_0 serial_1 serial_2 serial_3
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gfxterm vga_text mda_text morse spkmodem))
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(valid-inputs '(console serial serial_0 serial_1 serial_2 serial_3
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at_keyboard usb_keyboard))
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(io (string-append
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"terminal_output "
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(symbols->string
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(map
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(lambda (output)
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(if (memq output valid-outputs) output #f)) outputs)) "\n"
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(if (null? inputs)
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""
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(string-append
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"terminal_input "
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(symbols->string
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(map
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(lambda (input)
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(if (memq input valid-inputs) input #f)) inputs)) "\n"))
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;; UNIT and SPEED are arguments to the same GRUB command
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;; ("serial"), so we process them together.
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(if (or unit speed)
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(string-append
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"serial"
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(if unit
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;; COM ports 1 through 4
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(if (and (exact-integer? unit) (<= unit 3) (>= unit 0))
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(string-append " --unit=" (number->string unit))
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#f)
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"")
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(if speed
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(if (exact-integer? speed)
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(string-append " --speed=" (number->string speed))
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#f)
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""))
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""))))
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(format #f "~a" io)))
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(define (grub-root-search device file)
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"Return the GRUB 'search' command to look for DEVICE, which contains FILE,
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a gexp. The result is a gexp that can be inserted in the grub.cfg-generation
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code."
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;; Usually FILE is a file name gexp like "/gnu/store/…-linux/vmlinuz", but
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;; it can also be something like "(hd0,msdos1)/vmlinuz" in the case of
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;; custom menu entries. In the latter case, don't emit a 'search' command.
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(if (and (string? file) (not (string-prefix? "/" file)))
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""
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(match device
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;; Preferably refer to DEVICE by its UUID or label. This is more
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;; efficient and less ambiguous, see <http://bugs.gnu.org/22281>.
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((? uuid? uuid)
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(format #f "search --fs-uuid --set ~a"
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(uuid->string device)))
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((? file-system-label? label)
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(format #f "search --label --set ~a"
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(file-system-label->string label)))
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((or #f (? string?))
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#~(format #f "search --file --set ~a" #$file)))))
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(define* (grub-configuration-file config entries
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#:key
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(system (%current-system))
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(old-entries '())
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store-directory-prefix)
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"Return the GRUB configuration file corresponding to CONFIG, a
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<bootloader-configuration> object, and where the store is available at
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STORE-FS, a <file-system> object. OLD-ENTRIES is taken to be a list of menu
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entries corresponding to old generations of the system.
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STORE-DIRECTORY-PREFIX may be used to specify a store prefix, as is required
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when booting a root file system on a Btrfs subvolume."
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(define all-entries
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(append entries (bootloader-configuration-menu-entries config)))
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(define (menu-entry->gexp entry)
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(let ((label (menu-entry-label entry))
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(linux (menu-entry-linux entry))
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(device (menu-entry-device entry))
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(device-mount-point (menu-entry-device-mount-point entry)))
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(if linux
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(let ((arguments (menu-entry-linux-arguments entry))
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(linux (normalize-file linux
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device-mount-point
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store-directory-prefix))
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(initrd (normalize-file (menu-entry-initrd entry)
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device-mount-point
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store-directory-prefix)))
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;; Here DEVICE is the store and DEVICE-MOUNT-POINT is its mount point.
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;; Use the right file names for LINUX and INITRD in case
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;; DEVICE-MOUNT-POINT is not "/", meaning that the store is on a
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;; separate partition.
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;; When BTRFS-SUBVOLUME-FILE-NAME is defined, prepend it the linux and
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;; initrd paths, to allow booting from a Btrfs subvolume.
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#~(format port "menuentry ~s {
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~a
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linux ~a ~a
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initrd ~a
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}~%"
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#$label
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#$(grub-root-search device linux)
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#$linux (string-join (list #$@arguments))
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#$initrd))
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(let ((kernel (menu-entry-multiboot-kernel entry))
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(arguments (menu-entry-multiboot-arguments entry))
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(modules (menu-entry-multiboot-modules entry))
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(root-index 1)) ; XXX EFI will need root-index 2
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#~(format port "
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menuentry ~s {
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multiboot ~a root=device:hd0s~a~a~a
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}~%"
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#$label
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#$kernel
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#$root-index (string-join (list #$@arguments) " " 'prefix)
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(string-join (map string-join '#$modules)
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"\n module " 'prefix))))))
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(define (sugar)
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(let* ((entry (first all-entries))
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(device (menu-entry-device entry))
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(mount-point (menu-entry-device-mount-point entry)))
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(eye-candy config
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device
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mount-point
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#:store-directory-prefix store-directory-prefix
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#:system system
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#:port #~port)))
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(define keyboard-layout-config
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(let* ((layout (bootloader-configuration-keyboard-layout config))
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(grub (bootloader-package
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(bootloader-configuration-bootloader config)))
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(keymap* (and layout
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(keyboard-layout-file layout #:grub grub)))
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(keymap (and keymap*
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(if store-directory-prefix
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#~(string-append #$store-directory-prefix
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#$keymap*)
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keymap*))))
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#~(when #$keymap
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(format port "\
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insmod keylayouts
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keymap ~a~%" #$keymap))))
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(define builder
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#~(call-with-output-file #$output
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(lambda (port)
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(format port
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"# This file was generated from your Guix configuration. Any changes
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# will be lost upon reconfiguration.
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")
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#$(sugar)
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#$keyboard-layout-config
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(format port "
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set default=~a
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set timeout=~a~%"
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#$(bootloader-configuration-default-entry config)
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#$(bootloader-configuration-timeout config))
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#$@(map menu-entry->gexp all-entries)
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#$@(if (pair? old-entries)
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#~((format port "
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submenu \"GNU system, old configurations...\" {~%")
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#$@(map menu-entry->gexp old-entries)
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(format port "}~%"))
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#~())
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(format port "
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if [ \"${grub_platform}\" == efi ]; then
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menuentry \"Firmware setup\" {
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fwsetup
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}
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fi~%"))))
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;; Since this file is rather unique, there's no point in trying to
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;; substitute it.
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(computed-file "grub.cfg" builder
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#:options '(#:local-build? #t
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#:substitutable? #f)))
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;;;
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;;; Install procedures.
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;;;
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(define install-grub
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#~(lambda (bootloader device mount-point)
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(let ((grub (string-append bootloader "/sbin/grub-install"))
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(install-dir (string-append mount-point "/boot")))
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;; Install GRUB on DEVICE which is mounted at MOUNT-POINT. If DEVICE
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;; is #f, then we populate the disk-image rooted at MOUNT-POINT.
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(if device
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(begin
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;; Tell 'grub-install' that there might be a LUKS-encrypted
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;; /boot or root partition.
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(setenv "GRUB_ENABLE_CRYPTODISK" "y")
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;; Hide potentially confusing messages from the user, such as
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;; "Installing for i386-pc platform."
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(invoke/quiet grub "--no-floppy" "--target=i386-pc"
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"--boot-directory" install-dir
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device))
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;; When creating a disk-image, only install GRUB modules.
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(copy-recursively (string-append bootloader "/lib/")
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install-dir)))))
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(define install-grub-disk-image
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#~(lambda (bootloader root-index image)
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;; Install GRUB on the given IMAGE. The root partition index is
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;; ROOT-INDEX.
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(let ((grub-mkimage
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(string-append bootloader "/bin/grub-mkimage"))
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(modules '("biosdisk" "part_msdos" "fat" "ext2"))
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(grub-bios-setup
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(string-append bootloader "/sbin/grub-bios-setup"))
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(root-device (format #f "hd0,msdos~a" root-index))
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(boot-img (string-append bootloader "/lib/grub/i386-pc/boot.img"))
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(device-map "device.map"))
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;; Create a minimal, standalone GRUB image that will be written
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;; directly in the MBR-GAP (space between the end of the MBR and the
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;; first partition).
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(apply invoke grub-mkimage
|
||
"-O" "i386-pc"
|
||
"-o" "core.img"
|
||
"-p" (format #f "(~a)/boot/grub" root-device)
|
||
modules)
|
||
|
||
;; Create a device mapping file.
|
||
(call-with-output-file device-map
|
||
(lambda (port)
|
||
(format port "(hd0) ~a~%" image)))
|
||
|
||
;; Copy the default boot.img, that will be written on the MBR sector
|
||
;; by GRUB-BIOS-SETUP.
|
||
(copy-file boot-img "boot.img")
|
||
|
||
;; Install both the "boot.img" and the "core.img" files on the given
|
||
;; IMAGE. On boot, the MBR sector will execute the minimal GRUB
|
||
;; written in the MBR-GAP. GRUB configuration and missing modules will
|
||
;; be read from ROOT-DEVICE.
|
||
(invoke grub-bios-setup
|
||
"-m" device-map
|
||
"-r" root-device
|
||
"-d" "."
|
||
image))))
|
||
|
||
(define install-grub-efi
|
||
#~(lambda (bootloader efi-dir mount-point)
|
||
;; Install GRUB onto the EFI partition mounted at EFI-DIR, for the
|
||
;; system whose root is mounted at MOUNT-POINT.
|
||
(let ((grub-install (string-append bootloader "/sbin/grub-install"))
|
||
(install-dir (string-append mount-point "/boot"))
|
||
;; When installing Guix, it's common to mount EFI-DIR below
|
||
;; MOUNT-POINT rather than /boot/efi on the live image.
|
||
(target-esp (if (file-exists? (string-append mount-point efi-dir))
|
||
(string-append mount-point efi-dir)
|
||
efi-dir)))
|
||
;; Tell 'grub-install' that there might be a LUKS-encrypted /boot or
|
||
;; root partition.
|
||
(setenv "GRUB_ENABLE_CRYPTODISK" "y")
|
||
(invoke/quiet grub-install "--boot-directory" install-dir
|
||
"--bootloader-id=Guix"
|
||
"--efi-directory" target-esp))))
|
||
|
||
|
||
|
||
;;;
|
||
;;; Bootloader definitions.
|
||
;;;
|
||
|
||
(define grub-bootloader
|
||
(bootloader
|
||
(name 'grub)
|
||
(package grub)
|
||
(installer install-grub)
|
||
(disk-image-installer install-grub-disk-image)
|
||
(configuration-file "/boot/grub/grub.cfg")
|
||
(configuration-file-generator grub-configuration-file)))
|
||
|
||
(define* grub-minimal-bootloader
|
||
(bootloader
|
||
(inherit grub-bootloader)
|
||
(package grub-minimal)))
|
||
|
||
(define* grub-efi-bootloader
|
||
(bootloader
|
||
(inherit grub-bootloader)
|
||
(installer install-grub-efi)
|
||
(disk-image-installer #f)
|
||
(name 'grub-efi)
|
||
(package grub-efi)))
|
||
|
||
(define* grub-mkrescue-bootloader
|
||
(bootloader
|
||
(inherit grub-efi-bootloader)
|
||
(package grub-hybrid)))
|
||
|
||
|
||
;;;
|
||
;;; Compatibility macros.
|
||
;;;
|
||
|
||
(define-syntax grub-configuration
|
||
(syntax-rules (grub)
|
||
((_ (grub package) fields ...)
|
||
(if (eq? package grub)
|
||
(bootloader-configuration
|
||
(bootloader grub-bootloader)
|
||
fields ...)
|
||
(bootloader-configuration
|
||
(bootloader grub-efi-bootloader)
|
||
fields ...)))
|
||
((_ fields ...)
|
||
(bootloader-configuration
|
||
(bootloader grub-bootloader)
|
||
fields ...))))
|
||
|
||
;;; grub.scm ends here
|