;;; 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 uuid) #: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>. ((? uuid? 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 (BIOS)"))))) (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"))) ;; Tell 'grub-install' that there might be a LUKS-encrypted /boot or ;; root partition. (setenv "GRUB_ENABLE_CRYPTODISK" "y") (unless (zero? (system* grub-install "--boot-directory" install-dir "--efi-directory" efi-dir)) (error "failed to install GRUB (EFI)"))))) ;;; ;;; 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) (installer install-grub-efi) (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