450 lines
16 KiB
Scheme
450 lines
16 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014, 2015, 2016, 2017, 2018 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 Mathieu Othacehe <m.othacehe@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 store)
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#:use-module (guix packages)
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#:use-module (guix derivations)
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#:use-module (guix records)
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#:use-module (guix monads)
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#:use-module (guix gexp)
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#:use-module (guix download)
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#:use-module (gnu artwork)
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#:use-module (gnu system)
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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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#:autoload (gnu packages bootloaders) (grub)
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#:autoload (gnu packages compression) (gzip)
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#:autoload (gnu packages gtk) (guile-cairo guile-rsvg)
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#:autoload (gnu packages guile) (guile-2.2)
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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 (rnrs bytevectors)
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#:export (grub-image
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grub-image?
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grub-image-aspect-ratio
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grub-image-file
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grub-theme
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grub-theme?
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grub-theme-images
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grub-theme-color-normal
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grub-theme-color-highlight
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%background-image
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%default-theme
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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-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 (strip-mount-point mount-point file)
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"Strip MOUNT-POINT from FILE, which is a gexp or other lowerable object
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denoting a file name."
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(match mount-point
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((? string? 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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(#f file)))
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(define-record-type* <grub-image>
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grub-image make-grub-image
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grub-image?
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(aspect-ratio grub-image-aspect-ratio ;rational number
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(default 4/3))
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(file grub-image-file)) ;file-valued gexp (SVG)
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(define-record-type* <grub-theme>
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grub-theme make-grub-theme
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grub-theme?
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(images grub-theme-images
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(default '())) ;list of <grub-image>
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(color-normal grub-theme-color-normal
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(default '((fg . cyan) (bg . blue))))
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(color-highlight grub-theme-color-highlight
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(default '((fg . white) (bg . blue)))))
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(define %background-image
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(grub-image
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(aspect-ratio 4/3)
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(file (file-append %artwork-repository
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"/grub/GuixSD-fully-black-4-3.svg"))))
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(define %default-theme
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;; Default theme contributed by Felipe López.
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(grub-theme
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(images (list %background-image))
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(color-highlight '((fg . yellow) (bg . black)))
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(color-normal '((fg . light-gray) (bg . black))))) ;XXX: #x303030
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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 %default-theme
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otherwise."
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(or (bootloader-configuration-theme config) %default-theme))
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(define* (svg->png svg #:key width height)
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"Build a PNG of HEIGHT x WIDTH from SVG."
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(gexp->derivation "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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#~(begin
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(use-modules (gnu build svg))
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(svg->png #+svg #$output
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#:width #$width
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#:height #$height))))))
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(define* (grub-background-image config #:key (width 1024) (height 768))
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"Return the GRUB background image defined in CONFIG with a ratio of
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WIDTH/HEIGHT, or #f if none was found."
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(let* ((ratio (/ width height))
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(image (find (lambda (image)
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(= (grub-image-aspect-ratio image) ratio))
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(grub-theme-images
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(bootloader-theme config)))))
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(if image
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(svg->png (grub-image-file image)
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#:width width #:height height)
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(with-monad %store-monad
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(return #f)))))
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(define* (eye-candy config store-device store-mount-point
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#:key system port)
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"Return in %STORE-MONAD a gexp that writes to PORT (a port-valued gexp) the
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'grub.cfg' part concerned with graphics mode, background images, colors, and
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all that. STORE-DEVICE designates the device holding the store, and
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STORE-MOUNT-POINT is its mount point; these are used to determine where the
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background image and fonts must be searched for. SYSTEM must be the target
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system string---e.g., \"x86_64-linux\"."
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(define setup-gfxterm-body
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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 don't
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;; need to be switched.
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(if (string-match "^(x86_64|i[3-6]86)-" system)
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"
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# Leave 'gfxmode' to 'auto'.
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insmod video_bochs
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insmod video_cirrus
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insmod gfxterm
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if [ \"${grub_platform}\" == efi ]; then
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# This is for (U)EFI systems (these modules are unavailable in the
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# non-EFI GRUB.) If we don't load them, GRUB boots in \"blind mode\",
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# which isn't convenient.
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insmod efi_gop
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insmod efi_uga
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else
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# These are specific to non-EFI Intel machines.
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insmod vbe
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insmod vga
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fi
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"
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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~%" #$font-file)
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""))
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(define (theme-colors type)
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(let* ((theme (bootloader-theme config))
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(colors (type theme)))
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(string-append (symbol->string (assoc-ref colors 'fg)) "/"
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(symbol->string (assoc-ref colors 'bg)))))
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(define font-file
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(strip-mount-point store-mount-point
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(file-append grub "/share/grub/unicode.pf2")))
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(mlet* %store-monad ((image (grub-background-image config)))
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(return (and image
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#~(format #$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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#$(strip-mount-point store-mount-point image)
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#$(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 (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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"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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(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 ((device (menu-entry-device entry))
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(device-mount-point (menu-entry-device-mount-point entry))
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(label (menu-entry-label entry))
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(kernel (menu-entry-linux entry))
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(arguments (menu-entry-linux-arguments entry))
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(initrd (menu-entry-initrd entry)))
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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 KERNEL 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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(let ((kernel (strip-mount-point device-mount-point kernel))
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(initrd (strip-mount-point device-mount-point initrd)))
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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 kernel)
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#$kernel (string-join (list #$@arguments))
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#$initrd))))
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(mlet %store-monad ((sugar (eye-candy config
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(menu-entry-device
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(first all-entries))
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(menu-entry-device-mount-point
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(first all-entries))
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#:system system
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#:port #~port)))
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(define builder
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#~(call-with-output-file #$output
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(lambda (port)
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(format port
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"# This file was generated from your GuixSD configuration. Any changes
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# will be lost upon reconfiguration.
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")
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#$sugar
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(format port "
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set default=~a
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set timeout=~a~%"
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#$(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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(gexp->derivation "grub.cfg" builder)))
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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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;; Install GRUB on DEVICE which is mounted at 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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;; Tell 'grub-install' that there might be a LUKS-encrypted /boot or
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;; root partition.
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(setenv "GRUB_ENABLE_CRYPTODISK" "y")
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(unless (zero? (system* grub "--no-floppy" "--target=i386-pc"
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"--boot-directory" install-dir
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device))
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(error "failed to install GRUB (BIOS)")))))
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(define install-grub-efi
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#~(lambda (bootloader efi-dir mount-point)
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;; Install GRUB onto the EFI partition mounted at EFI-DIR, for the
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;; system whose root is mounted at MOUNT-POINT.
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(let ((grub-install (string-append bootloader "/sbin/grub-install"))
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(install-dir (string-append mount-point "/boot"))
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;; When installing GuixSD, it's common to mount EFI-DIR below
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;; MOUNT-POINT rather than /boot/efi on the live image.
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(target-esp (if (file-exists? (string-append mount-point efi-dir))
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(string-append mount-point efi-dir)
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efi-dir)))
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;; Tell 'grub-install' that there might be a LUKS-encrypted /boot or
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;; root partition.
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(setenv "GRUB_ENABLE_CRYPTODISK" "y")
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(unless (zero? (system* grub-install "--boot-directory" install-dir
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"--bootloader-id=GuixSD"
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"--efi-directory" target-esp))
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(error "failed to install GRUB (EFI)")))))
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;;;
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;;; Bootloader definitions.
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;;;
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(define grub-bootloader
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(bootloader
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(name 'grub)
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(package grub)
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(installer install-grub)
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(configuration-file "/boot/grub/grub.cfg")
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(configuration-file-generator grub-configuration-file)))
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(define* grub-efi-bootloader
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(bootloader
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(inherit grub-bootloader)
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(installer install-grub-efi)
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(name 'grub-efi)
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(package grub-efi)))
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(define* grub-mkrescue-bootloader
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(bootloader
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(inherit grub-efi-bootloader)
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(package grub-hybrid)))
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;;;
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;;; Compatibility macros.
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;;;
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(define-syntax grub-configuration
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(syntax-rules (grub)
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((_ (grub package) fields ...)
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(if (eq? package grub)
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(bootloader-configuration
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(bootloader grub-bootloader)
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fields ...)
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(bootloader-configuration
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(bootloader grub-efi-bootloader)
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fields ...)))
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((_ fields ...)
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(bootloader-configuration
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(bootloader grub-bootloader)
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fields ...))))
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;;; grub.scm ends here
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