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-;;; 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>
-;;;
-;;; 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 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 bootloaders) (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)
- #: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-configuration
- grub-configuration?
- grub-configuration-device
- grub-configuration-grub
-
- menu-entry
- menu-entry?
-
- grub-configuration-file))
-
-;;; 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."
- (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>
- 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
-
-(define-record-type* <grub-configuration>
- grub-configuration make-grub-configuration
- grub-configuration?
- (grub grub-configuration-grub ; package
- (default (@ (gnu packages bootloaders) 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 ; <grub-theme>
- (default %default-theme)))
-
-(define-record-type* <menu-entry>
- menu-entry make-menu-entry
- menu-entry?
- (label menu-entry-label)
- (device menu-entry-device ; file system uuid, label, or #f
- (default #f))
- (device-mount-point menu-entry-device-mount-point
- (default "/"))
- (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 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 [ \"${grub_platform}\" == efi ]; then
- # This is for (U)EFI systems (these modules are unavailable in the
- # non-EFI GRUB.) If we don't load them, GRUB boots in \"blind mode\",
- # which isn't convenient.
- insmod efi_gop
- insmod efi_uga
- else
- # These are specific to non-EFI Intel machines.
- insmod vbe
- insmod vga
- fi
-
- terminal_output gfxterm
-"
- ""))
-
- (define (theme-colors type)
- (let* ((theme (grub-configuration-theme config))
- (colors (type theme)))
- (string-append (symbol->string (assoc-ref colors 'fg)) "/"
- (symbol->string (assoc-ref colors 'bg)))))
-
- (define font-file
- (strip-mount-point store-mount-point
- (file-append grub "/share/grub/unicode.pf2")))
-
- (mlet* %store-monad ((image (grub-background-image config)))
- (return (and image
- #~(format #$port "
-function setup_gfxterm {~a}
-
-# Set 'root' to the partition that contains /gnu/store.
-~a
-
-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 store-device font-file)
- #$font-file
-
- #$(strip-mount-point store-mount-point image)
- #$(theme-colors grub-theme-color-normal)
- #$(theme-colors grub-theme-color-highlight))))))
-
-
-;;;
-;;; Configuration file.
-;;;
-
-(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" #$file)))))
-
-(define* (grub-configuration-file config entries
- #:key
- (system (%current-system))
- (old-entries '()))
- "Return the GRUB configuration file corresponding to CONFIG, a
-<grub-configuration> object, and where the store is available at STORE-FS, a
-<file-system> object. OLD-ENTRIES is taken to be a list of menu entries
-corresponding to old generations of the system."
- (define all-entries
- (append entries (grub-configuration-menu-entries config)))
-
- (define entry->gexp
- (match-lambda
- (($ <menu-entry> label device device-mount-point
- linux arguments initrd)
- ;; Here DEVICE is the store and DEVICE-MOUNT-POINT is its mount point.
- ;; Use the right file names for LINUX and INITRD in case
- ;; DEVICE-MOUNT-POINT is not "/", meaning that the store is on a
- ;; separate partition.
- (let ((linux (strip-mount-point device-mount-point linux))
- (initrd (strip-mount-point device-mount-point initrd)))
- #~(format port "menuentry ~s {
- ~a
- linux ~a ~a
- initrd ~a
-}~%"
- #$label
- #$(grub-root-search device linux)
- #$linux (string-join (list #$@arguments))
- #$initrd)))))
-
- (mlet %store-monad ((sugar (eye-candy config
- (menu-entry-device (first entries))
- (menu-entry-device-mount-point
- (first entries))
- #:system system
- #:port #~port)))
- (define builder
- #~(call-with-output-file #$output
- (lambda (port)
- (format port
- "# This file was generated from your GuixSD configuration. Any changes
-# will be lost upon reconfiguration.
-")
- #$sugar
- (format port "
-set default=~a
-set timeout=~a~%"
- #$(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
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