;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org> ;;; Copyright © 2016 Christopher Allan Webber <cwebber@dustycloud.org> ;;; Copyright © 2016, 2017 Leo Famulari <leo@famulari.name> ;;; Copyright © 2017 Marius Bakke <mbakke@fastmail.com> ;;; Copyright © 2020 Tobias Geerinckx-Rice <me@tobias.gr> ;;; Copyright © 2020 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 build image) #:use-module (guix build store-copy) #:use-module (guix build syscalls) #:use-module (guix build utils) #:use-module (guix store database) #:use-module (gnu build bootloader) #:use-module (gnu build install) #:use-module (gnu build linux-boot) #:use-module (gnu image) #:use-module (gnu system uuid) #:use-module (ice-9 ftw) #:use-module (ice-9 match) #:use-module (srfi srfi-19) #:use-module (srfi srfi-34) #:use-module (srfi srfi-35) #:export (make-partition-image genimage initialize-efi-partition initialize-root-partition make-iso9660-image)) (define (sexp->partition sexp) "Take SEXP, a tuple as returned by 'partition->gexp', and turn it into a <partition> record." (match sexp ((size file-system label uuid) (partition (size size) (file-system file-system) (label label) (uuid uuid))))) (define (size-in-kib size) "Convert SIZE expressed in bytes, to kilobytes and return it as a string." (number->string (inexact->exact (ceiling (/ size 1024))))) (define (estimate-partition-size root) "Given the ROOT directory, evalute and return its size. As this doesn't take the partition metadata size into account, take a 25% margin." (* 1.25 (file-size root))) (define* (make-ext4-image partition target root #:key (owner-uid 0) (owner-gid 0)) "Handle the creation of EXT4 partition images. See 'make-partition-image'." (let ((size (partition-size partition)) (label (partition-label partition)) (uuid (partition-uuid partition)) (options "lazy_itable_init=1,lazy_journal_init=1")) (invoke "mke2fs" "-t" "ext4" "-d" root "-L" label "-U" (uuid->string uuid) "-E" (format #f "root_owner=~a:~a,~a" owner-uid owner-gid options) target (format #f "~ak" (size-in-kib (if (eq? size 'guess) (estimate-partition-size root) size)))))) (define* (make-vfat-image partition target root) "Handle the creation of VFAT partition images. See 'make-partition-image'." (let ((size (partition-size partition)) (label (partition-label partition))) (invoke "mkdosfs" "-n" label "-C" target "-F" "16" "-S" "1024" (size-in-kib (if (eq? size 'guess) (estimate-partition-size root) size))) (for-each (lambda (file) (unless (member file '("." "..")) (invoke "mcopy" "-bsp" "-i" target (string-append root "/" file) (string-append "::" file)))) (scandir root)))) (define* (make-partition-image partition-sexp target root) "Create and return the image of PARTITION-SEXP as TARGET. Use the given ROOT directory to populate the image." (let* ((partition (sexp->partition partition-sexp)) (type (partition-file-system partition))) (cond ((string=? type "ext4") (make-ext4-image partition target root)) ((string=? type "vfat") (make-vfat-image partition target root)) (else (format (current-error-port) "Unsupported partition type~%."))))) (define* (genimage config target) "Use genimage to generate in TARGET directory, the image described in the given CONFIG file." ;; genimage needs a 'root' directory. (mkdir "root") (invoke "genimage" "--config" config "--outputpath" target)) (define* (register-closure prefix closure #:key (deduplicate? #t) (reset-timestamps? #t) (schema (sql-schema))) "Register CLOSURE in PREFIX, where PREFIX is the directory name of the target store and CLOSURE is the name of a file containing a reference graph as produced by #:references-graphs.. As a side effect, if RESET-TIMESTAMPS? is true, reset timestamps on store files and, if DEDUPLICATE? is true, deduplicates files common to CLOSURE and the rest of PREFIX." (let ((items (call-with-input-file closure read-reference-graph))) (register-items items #:prefix prefix #:deduplicate? deduplicate? #:reset-timestamps? reset-timestamps? #:registration-time %epoch #:schema schema))) (define* (initialize-efi-partition root #:key bootloader-package #:allow-other-keys) "Install in ROOT directory, an EFI loader using BOOTLOADER-PACKAGE." (install-efi-loader bootloader-package root)) (define* (initialize-root-partition root #:key bootcfg bootcfg-location (deduplicate? #t) references-graphs (register-closures? #t) system-directory #:allow-other-keys) "Initialize the given ROOT directory. Use BOOTCFG and BOOTCFG-LOCATION to install the bootloader configuration. If REGISTER-CLOSURES? is true, register REFERENCES-GRAPHS in the store. If DEDUPLICATE? is true, then also deduplicate files common to CLOSURES and the rest of the store when registering the closures. SYSTEM-DIRECTORY is the name of the directory of the 'system' derivation." (populate-root-file-system system-directory root) (populate-store references-graphs root) (when register-closures? (for-each (lambda (closure) (register-closure root closure #:reset-timestamps? #t #:deduplicate? deduplicate?)) references-graphs)) (when bootcfg (install-boot-config bootcfg bootcfg-location root))) (define* (make-iso9660-image xorriso grub-mkrescue-environment grub bootcfg system-directory root target #:key (volume-id "Guix_image") (volume-uuid #f) register-closures? (references-graphs '()) (compression? #t)) "Given a GRUB package, creates an iso image as TARGET, using BOOTCFG as GRUB configuration and OS-DRV as the stuff in it." (define grub-mkrescue (string-append grub "/bin/grub-mkrescue")) (define grub-mkrescue-sed.sh (string-append (getcwd) "/" "grub-mkrescue-sed.sh")) ;; Use a modified version of grub-mkrescue-sed.sh, see below. (copy-file (string-append xorriso "/bin/grub-mkrescue-sed.sh") grub-mkrescue-sed.sh) ;; Force grub-mkrescue-sed.sh to use the build directory instead of /tmp ;; that is read-only inside the build container. (substitute* grub-mkrescue-sed.sh (("/tmp/") (string-append (getcwd) "/")) (("MKRESCUE_SED_XORRISO_ARGS \\$x") (format #f "MKRESCUE_SED_XORRISO_ARGS $(echo $x | sed \"s|/tmp|~a|\")" (getcwd)))) ;; 'grub-mkrescue' calls out to mtools programs to create 'efi.img', a FAT ;; file system image, and mtools honors SOURCE_DATE_EPOCH for the mtime of ;; those files. The epoch for FAT is Jan. 1st 1980, not 1970, so choose ;; that. (setenv "SOURCE_DATE_EPOCH" (number->string (time-second (date->time-utc (make-date 0 0 0 0 1 1 1980 0))))) ;; Our patched 'grub-mkrescue' honors this environment variable and passes ;; it to 'mformat', which makes it the serial number of 'efi.img'. This ;; allows for deterministic builds. (setenv "GRUB_FAT_SERIAL_NUMBER" (number->string (if volume-uuid ;; On 32-bit systems the 2nd argument must be ;; lower than 2^32. (string-hash (iso9660-uuid->string volume-uuid) (- (expt 2 32) 1)) #x77777777) 16)) (setenv "MKRESCUE_SED_MODE" "original") (setenv "MKRESCUE_SED_XORRISO" (string-append xorriso "/bin/xorriso")) (setenv "MKRESCUE_SED_IN_EFI_NO_PT" "yes") (for-each (match-lambda ((name . value) (setenv name value))) grub-mkrescue-environment) (apply invoke grub-mkrescue (string-append "--xorriso=" grub-mkrescue-sed.sh) "-o" target (string-append "boot/grub/grub.cfg=" bootcfg) root "--" ;; Set all timestamps to 1. "-volume_date" "all_file_dates" "=1" `(,@(if compression? '(;; ‘zisofs’ compression reduces the total image size by ;; ~60%. "-zisofs" "level=9:block_size=128k" ; highest compression ;; It's transparent to our Linux-Libre kernel but not to ;; GRUB. Don't compress the kernel, initrd, and other ;; files read by grub.cfg, as well as common ;; already-compressed file names. "-find" "/" "-type" "f" ;; XXX Even after "--" above, and despite documentation ;; claiming otherwise, "-or" is stolen by grub-mkrescue ;; which then chokes on it (as ‘-o …’) and dies. Don't use ;; "-or". "-not" "-wholename" "/boot/*" "-not" "-wholename" "/System/*" "-not" "-name" "unicode.pf2" "-not" "-name" "bzImage" "-not" "-name" "*.gz" ; initrd & all man pages "-not" "-name" "*.png" ; includes grub-image.png "-exec" "set_filter" "--zisofs" "--") '()) "-volid" ,(string-upcase volume-id) ,@(if volume-uuid `("-volume_date" "uuid" ,(string-filter (lambda (value) (not (char=? #\- value))) (iso9660-uuid->string volume-uuid))) '()))))