;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2013, 2014, 2015, 2016 Ludovic Courtès ;;; Copyright © 2016 Chris Marusich ;;; ;;; 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 . (define-module (gnu system 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 file-systems) #:autoload (gnu packages grub) (grub) #:autoload (gnu packages compression) (gzip) #:autoload (gnu packages gtk) (guile-cairo guile-rsvg) #:use-module (ice-9 match) #:use-module (ice-9 regex) #:use-module (srfi srfi-1) #: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-configuration grub-configuration? grub-configuration-device menu-entry menu-entry? grub-configuration-file)) ;;; Commentary: ;;; ;;; Configuration of GNU GRUB. ;;; ;;; Code: (define (strip-mount-point fs file) "Strip the mount point of FS from FILE, which is a gexp or other lowerable object denoting a file name." (let ((mount-point (file-system-mount-point fs))) (if (string=? mount-point "/") file #~(let ((file #$file)) (if (string-prefix? #$mount-point file) (substring #$file #$(string-length mount-point)) file))))) (define-record-type* 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 make-grub-theme grub-theme? (images grub-theme-images (default '())) ;list of (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 #~(string-append #$%artwork-repository "/grub/GuixSD-fully-black-4-3.svg")))) (define %default-theme ;; Default theme contributed by Felipe López. (grub-theme (images (list %background-image)) (color-highlight '((fg . yellow) (bg . black))) (color-normal '((fg . light-gray) (bg . black))))) ;XXX: #x303030 (define-record-type* grub-configuration make-grub-configuration grub-configuration? (grub grub-configuration-grub ; package (default (@ (gnu packages grub) grub))) (device grub-configuration-device) ; string (menu-entries grub-configuration-menu-entries ; list (default '())) (default-entry grub-configuration-default-entry ; integer (default 0)) (timeout grub-configuration-timeout ; integer (default 5)) (theme grub-configuration-theme ; (default %default-theme))) (define-record-type* menu-entry make-menu-entry menu-entry? (label menu-entry-label) (device menu-entry-device) ; file system uuid, label, or #f (linux menu-entry-linux) (linux-arguments menu-entry-linux-arguments (default '())) ; list of string-valued gexps (initrd menu-entry-initrd)) ; file name of the initrd as a gexp ;;; ;;; Background image & themes. ;;; (define* (svg->png svg #:key width height) "Build a PNG of HEIGHT x WIDTH from SVG." (gexp->derivation "grub-image.png" (with-imported-modules '((gnu build svg)) #~(begin ;; We need these two libraries. (add-to-load-path (string-append #$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 #$height))))) (define* (grub-background-image config #:key (width 1024) (height 768)) "Return the GRUB background image defined in CONFIG with a ratio of WIDTH/HEIGHT, or #f if none was found." (let* ((ratio (/ width height)) (image (find (lambda (image) (= (grub-image-aspect-ratio image) ratio)) (grub-theme-images (grub-configuration-theme config))))) (if image (svg->png (grub-image-file image) #:width width #:height height) (with-monad %store-monad (return #f))))) (define (eye-candy config root-fs system port) "Return in %STORE-MONAD a gexp that writes to PORT (a port-valued gexp) the 'grub.cfg' part concerned with graphics mode, background images, colors, and all that. ROOT-FS is a file-system object denoting the root file system where the store is. SYSTEM must be the target system string---e.g., \"x86_64-linux\"." (define setup-gfxterm-body ;; Intel systems need to be switched into graphics mode, whereas most ;; other modern architectures have no other mode and therefore don't need ;; to be switched. (if (string-match "^(x86_64|i[3-6]86)-" system) " # Leave 'gfxmode' to 'auto'. insmod vbe insmod vga insmod video_bochs insmod video_cirrus insmod gfxterm terminal_output gfxterm " "")) (define (theme-colors type) (let* ((theme (grub-configuration-theme config)) (colors (type theme))) (string-append (symbol->string (assoc-ref colors 'fg)) "/" (symbol->string (assoc-ref colors 'bg))))) (define font-file (strip-mount-point root-fs (file-append grub "/share/grub/unicode.pf2"))) (mlet* %store-monad ((image (grub-background-image config))) (return (and image #~(format #$port " function setup_gfxterm {~a} # Set 'root' to the partition that contains /gnu/store. ~a if loadfont ~a; then setup_gfxterm fi 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 root-fs font-file) #$font-file #$(strip-mount-point root-fs image) #$(theme-colors grub-theme-color-normal) #$(theme-colors grub-theme-color-highlight)))))) ;;; ;;; Configuration file. ;;; (define (grub-root-search root-fs file) "Return the GRUB 'search' command to look for ROOT-FS, 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))) "" (case (file-system-title root-fs) ;; Preferably refer to ROOT-FS by its UUID or label. This is more ;; efficient and less ambiguous, see <>. ((uuid) (format #f "search --fs-uuid --set ~a" (uuid->string (file-system-device root-fs)))) ((label) (format #f "search --label --set ~a" (file-system-device root-fs))) (else ;; As a last resort, look for any device containing FILE. #~(format #f "search --file --set ~a" #$file))))) (define* (grub-configuration-file config store-fs entries #:key (system (%current-system)) (old-entries '())) "Return the GRUB configuration file corresponding to CONFIG, a object, and where the store is available at STORE-FS, a object. OLD-ENTRIES is taken to be a list of menu entries corresponding to old generations of the system." (define all-entries (append entries (grub-configuration-menu-entries config))) (define entry->gexp (match-lambda (($ label device linux arguments initrd) ;; Use the right file names for LINUX and STORE-FS in case STORE-FS is ;; not the "/" file system. (let ((linux (strip-mount-point store-fs linux)) (initrd (strip-mount-point store-fs initrd))) #~(format port "menuentry ~s { ~a linux ~a ~a initrd ~a }~%" #$label #$(grub-root-search store-fs linux) #$linux (string-join (list #$@arguments)) #$initrd))))) (mlet %store-monad ((sugar (eye-candy config store-fs system #~port))) (define builder #~(call-with-output-file #$output (lambda (port) (format port "# This file was generated from your GuixSD configuration. Any changes # will be lost upon reconfiguration. ") #$sugar (format port " set default=~a set timeout=~a~%" #$(grub-configuration-default-entry config) #$(grub-configuration-timeout config)) #$@(map entry->gexp all-entries) #$@(if (pair? old-entries) #~((format port " submenu \"GNU system, old configurations...\" {~%") #$@(map entry->gexp old-entries) (format port "}~%")) #~())))) (gexp->derivation "grub.cfg" builder))) ;;; grub.scm ends here