guix/gnu/bootloader/grub.scm
Danny Milosavljevic cf189709bc
vm: Use grub-hybrid's grub-mkrescue.
* gnu/system/vm.scm (system-disk-image): Use grub-hybrid's grub-mkrescue.
* gnu/bootlader/grub.scm (grub-mkrescue-bootloader): New variable.
2017-08-03 18:13:03 +02:00

440 lines
16 KiB
Scheme
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2016 Chris Marusich <cmmarusich@gmail.com>
;;; Copyright © 2017 Leo Famulari <leo@famulari.name>
;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
;;;
;;; 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 bootloader 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 (guix download)
#:use-module (gnu artwork)
#:use-module (gnu system)
#:use-module (gnu bootloader)
#:use-module (gnu system file-systems)
#:autoload (gnu packages bootloaders) (grub)
#:autoload (gnu packages compression) (gzip)
#:autoload (gnu packages gtk) (guile-cairo guile-rsvg)
#:autoload (gnu packages guile) (guile-2.2)
#:use-module (ice-9 match)
#:use-module (ice-9 regex)
#:use-module (srfi srfi-1)
#:use-module (rnrs bytevectors)
#:export (grub-image
grub-image?
grub-image-aspect-ratio
grub-image-file
grub-theme
grub-theme?
grub-theme-images
grub-theme-color-normal
grub-theme-color-highlight
%background-image
%default-theme
grub-bootloader
grub-efi-bootloader
grub-mkrescue-bootloader
grub-configuration))
;;; Commentary:
;;;
;;; Configuration of GNU GRUB.
;;;
;;; Code:
(define (strip-mount-point mount-point file)
"Strip MOUNT-POINT from FILE, which is a gexp or other lowerable object
denoting a file name."
(match mount-point
((? string? mount-point)
(if (string=? mount-point "/")
file
#~(let ((file #$file))
(if (string-prefix? #$mount-point file)
(substring #$file #$(string-length mount-point))
file))))
(#f file)))
(define-record-type* <grub-image>
grub-image make-grub-image
grub-image?
(aspect-ratio grub-image-aspect-ratio ;rational number
(default 4/3))
(file grub-image-file)) ;file-valued gexp (SVG)
(define-record-type* <grub-theme>
grub-theme make-grub-theme
grub-theme?
(images grub-theme-images
(default '())) ;list of <grub-image>
(color-normal grub-theme-color-normal
(default '((fg . cyan) (bg . blue))))
(color-highlight grub-theme-color-highlight
(default '((fg . white) (bg . blue)))))
(define %background-image
(grub-image
(aspect-ratio 4/3)
(file (file-append %artwork-repository
"/grub/GuixSD-fully-black-4-3.svg"))))
(define %default-theme
;; Default theme contributed by Felipe López.
(grub-theme
(images (list %background-image))
(color-highlight '((fg . yellow) (bg . black)))
(color-normal '((fg . light-gray) (bg . black))))) ;XXX: #x303030
;;;
;;; Background image & themes.
;;;
(define (bootloader-theme config)
"Return user defined theme in CONFIG if defined or %default-theme
otherwise."
(or (bootloader-configuration-theme config) %default-theme))
(define* (svg->png svg #:key width height)
"Build a PNG of HEIGHT x WIDTH from SVG."
;; Note: Guile-RSVG & co. are now built for Guile 2.2, so we use 2.2 here.
;; TODO: Remove #:guile-for-build when 2.2 has become the default.
(mlet %store-monad ((guile (package->derivation guile-2.2 #:graft? #f)))
(gexp->derivation "grub-image.png"
(with-imported-modules '((gnu build svg))
#~(begin
;; We need these two libraries.
(add-to-load-path (string-append #+guile-rsvg
"/share/guile/site/"
(effective-version)))
(add-to-load-path (string-append #+guile-cairo
"/share/guile/site/"
(effective-version)))
(use-modules (gnu build svg))
(svg->png #+svg #$output
#:width #$width
#:height #$height)))
#:guile-for-build guile)))
(define* (grub-background-image config #:key (width 1024) (height 768))
"Return the GRUB background image defined in CONFIG with a ratio of
WIDTH/HEIGHT, or #f if none was found."
(let* ((ratio (/ width height))
(image (find (lambda (image)
(= (grub-image-aspect-ratio image) ratio))
(grub-theme-images
(bootloader-theme config)))))
(if image
(svg->png (grub-image-file image)
#:width width #:height height)
(with-monad %store-monad
(return #f)))))
(define* (eye-candy config store-device store-mount-point
#:key system port)
"Return in %STORE-MONAD a gexp that writes to PORT (a port-valued gexp) the
'grub.cfg' part concerned with graphics mode, background images, colors, and
all that. STORE-DEVICE designates the device holding the store, and
STORE-MOUNT-POINT is its mount point; these are used to determine where the
background image and fonts must be searched for. SYSTEM must be the target
system string---e.g., \"x86_64-linux\"."
(define setup-gfxterm-body
;; Intel and EFI systems need to be switched into graphics mode, whereas
;; most other modern architectures have no other mode and therefore don't
;; need to be switched.
(if (string-match "^(x86_64|i[3-6]86)-" system)
"
# Leave 'gfxmode' to 'auto'.
insmod video_bochs
insmod video_cirrus
insmod gfxterm
if [ \"${grub_platform}\" == efi ]; then
# This is for (U)EFI systems (these modules are unavailable in the
# non-EFI GRUB.) If we don't load them, GRUB boots in \"blind mode\",
# which isn't convenient.
insmod efi_gop
insmod efi_uga
else
# These are specific to non-EFI Intel machines.
insmod vbe
insmod vga
fi
"
""))
(define (setup-gfxterm config font-file)
(if (memq 'gfxterm (bootloader-configuration-terminal-outputs config))
#~(format #f "if loadfont ~a; then
setup_gfxterm
fi~%" #$font-file)
""))
(define (theme-colors type)
(let* ((theme (bootloader-theme config))
(colors (type theme)))
(string-append (symbol->string (assoc-ref colors 'fg)) "/"
(symbol->string (assoc-ref colors 'bg)))))
(define font-file
(strip-mount-point store-mount-point
(file-append grub "/share/grub/unicode.pf2")))
(mlet* %store-monad ((image (grub-background-image config)))
(return (and image
#~(format #$port "
function setup_gfxterm {~a}
# Set 'root' to the partition that contains /gnu/store.
~a
~a
~a
insmod png
if background_image ~a; then
set color_normal=~a
set color_highlight=~a
else
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
fi~%"
#$setup-gfxterm-body
#$(grub-root-search store-device font-file)
#$(setup-gfxterm config font-file)
#$(grub-setup-io config)
#$(strip-mount-point store-mount-point image)
#$(theme-colors grub-theme-color-normal)
#$(theme-colors grub-theme-color-highlight))))))
;;;
;;; Configuration file.
;;;
(define (grub-setup-io config)
"Return GRUB commands to configure the input / output interfaces. The result
is a string that can be inserted in grub.cfg."
(let* ((symbols->string (lambda (list)
(string-join (map symbol->string list) " ")))
(outputs (bootloader-configuration-terminal-outputs config))
(inputs (bootloader-configuration-terminal-inputs config))
(unit (bootloader-configuration-serial-unit config))
(speed (bootloader-configuration-serial-speed config))
;; Respectively, GRUB_TERMINAL_OUTPUT and GRUB_TERMINAL_INPUT,
;; as documented in GRUB manual section "Simple Configuration
;; Handling".
(valid-outputs '(console serial serial_0 serial_1 serial_2 serial_3
gfxterm vga_text mda_text morse spkmodem))
(valid-inputs '(console serial serial_0 serial_1 serial_2 serial_3
at_keyboard usb_keyboard))
(io (string-append
"terminal_output "
(symbols->string
(map
(lambda (output)
(if (memq output valid-outputs) output #f)) outputs)) "\n"
(if (null? inputs)
""
(string-append
"terminal_input "
(symbols->string
(map
(lambda (input)
(if (memq input valid-inputs) input #f)) inputs)) "\n"))
;; UNIT and SPEED are arguments to the same GRUB command
;; ("serial"), so we process them together.
(if (or unit speed)
(string-append
"serial"
(if unit
;; COM ports 1 through 4
(if (and (exact-integer? unit) (<= unit 3) (>= unit 0))
(string-append " --unit=" (number->string unit))
#f)
"")
(if speed
(if (exact-integer? speed)
(string-append " --speed=" (number->string speed))
#f)
""))
""))))
(format #f "~a" io)))
(define (grub-root-search device file)
"Return the GRUB 'search' command to look for DEVICE, which contains FILE,
a gexp. The result is a gexp that can be inserted in the grub.cfg-generation
code."
;; Usually FILE is a file name gexp like "/gnu/store/…-linux/vmlinuz", but
;; it can also be something like "(hd0,msdos1)/vmlinuz" in the case of
;; custom menu entries. In the latter case, don't emit a 'search' command.
(if (and (string? file) (not (string-prefix? "/" file)))
""
(match device
;; Preferably refer to DEVICE by its UUID or label. This is more
;; efficient and less ambiguous, see <http://bugs.gnu.org/22281>.
((? bytevector? uuid)
(format #f "search --fs-uuid --set ~a"
(uuid->string device)))
((? string? label)
(format #f "search --label --set ~a" label))
(#f
#~(format #f "search --file --set ~a" #$file)))))
(define* (grub-configuration-file config entries
#:key
(system (%current-system))
(old-entries '()))
"Return the GRUB configuration file corresponding to CONFIG, a
<bootloader-configuration> object, and where the store is available at
STORE-FS, a <file-system> object. OLD-ENTRIES is taken to be a list of menu
entries corresponding to old generations of the system."
(define all-entries
(append entries (bootloader-configuration-menu-entries config)))
(define (menu-entry->gexp entry)
(let ((device (menu-entry-device entry))
(device-mount-point (menu-entry-device-mount-point entry))
(label (menu-entry-label entry))
(kernel (menu-entry-linux entry))
(arguments (menu-entry-linux-arguments entry))
(initrd (menu-entry-initrd entry)))
;; Here DEVICE is the store and DEVICE-MOUNT-POINT is its mount point.
;; Use the right file names for KERNEL and INITRD in case
;; DEVICE-MOUNT-POINT is not "/", meaning that the store is on a
;; separate partition.
(let ((kernel (strip-mount-point device-mount-point kernel))
(initrd (strip-mount-point device-mount-point initrd)))
#~(format port "menuentry ~s {
~a
linux ~a ~a
initrd ~a
}~%"
#$label
#$(grub-root-search device kernel)
#$kernel (string-join (list #$@arguments))
#$initrd))))
(mlet %store-monad ((sugar (eye-candy config
(menu-entry-device
(first all-entries))
(menu-entry-device-mount-point
(first all-entries))
#:system system
#:port #~port)))
(define builder
#~(call-with-output-file #$output
(lambda (port)
(format port
"# This file was generated from your GuixSD configuration. Any changes
# will be lost upon reconfiguration.
")
#$sugar
(format port "
set default=~a
set timeout=~a~%"
#$(bootloader-configuration-default-entry config)
#$(bootloader-configuration-timeout config))
#$@(map menu-entry->gexp all-entries)
#$@(if (pair? old-entries)
#~((format port "
submenu \"GNU system, old configurations...\" {~%")
#$@(map menu-entry->gexp old-entries)
(format port "}~%"))
#~()))))
(gexp->derivation "grub.cfg" builder)))
;;;
;;; Install procedures.
;;;
(define install-grub
#~(lambda (bootloader device mount-point)
;; Install GRUB on DEVICE which is mounted at MOUNT-POINT.
(let ((grub (string-append bootloader "/sbin/grub-install"))
(install-dir (string-append mount-point "/boot")))
;; Tell 'grub-install' that there might be a LUKS-encrypted /boot or
;; root partition.
(setenv "GRUB_ENABLE_CRYPTODISK" "y")
(unless (zero? (system* grub "--no-floppy"
"--boot-directory" install-dir
device))
(error "failed to install GRUB")))))
;;;
;;; Bootloader definitions.
;;;
(define grub-bootloader
(bootloader
(name 'grub)
(package grub)
(installer install-grub)
(configuration-file "/boot/grub/grub.cfg")
(configuration-file-generator grub-configuration-file)))
(define* grub-efi-bootloader
(bootloader
(inherit grub-bootloader)
(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