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system: Add a version field to the <boot-parameters> record.

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This version field exposes the (already present) version information of a boot
parameters file.

* gnu/system.scm (%boot-parameters-version): New variable.
(<boot-parameters>)[version]: New field.
(read-boot-parameters): Use it.
(operating-system-boot-parameters-file): Likewise.
* tests/boot-parameters.scm (test-read-boot-parameters): Use
%boot-parameters-version as the default version value in the template.
This commit is contained in:
Maxim Cournoyer 2022-02-18 15:42:07 -05:00
parent a53ea46bfc
commit 4a3b8f4d59
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GPG Key ID: 1260E46482E63562
2 changed files with 18 additions and 5 deletions
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21
gnu/system.scm
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@ -9,7 +9,7 @@
;;; Copyright © 2020 Danny Milosavljevic <dannym@scratchpost.org>
;;; Copyright © 2020, 2021 Brice Waegeneire <brice@waegenei.re>
;;; Copyright © 2020 Florian Pelz <pelzflorian@pelzflorian.de>
;;; Copyright © 2020 Maxim Cournoyer <maxim.cournoyer@gmail.com>
;;; Copyright © 2020, 2022 Maxim Cournoyer <maxim.cournoyer@gmail.com>
;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <jannek@gnu.org>
;;; Copyright © 2020 Efraim Flashner <efraim@flashner.co.il>
;;; Copyright © 2021 Maxime Devos <maximedevos@telenet.be>
@ -161,6 +161,8 @@
boot-parameters-kernel-arguments
boot-parameters-initrd
boot-parameters-multiboot-modules
boot-parameters-version
%boot-parameters-version
read-boot-parameters
read-boot-parameters-file
boot-parameters->menu-entry
@ -295,6 +297,9 @@ directly by the user."
;;; Boot parameters
;;;
;;; When bumping the boot-parameters version, increment it by one (1).
(define %boot-parameters-version 0)
(define-record-type* <boot-parameters>
boot-parameters make-boot-parameters boot-parameters?
(label boot-parameters-label)
@ -322,7 +327,9 @@ directly by the user."
(kernel boot-parameters-kernel)
(kernel-arguments boot-parameters-kernel-arguments)
(initrd boot-parameters-initrd)
(multiboot-modules boot-parameters-multiboot-modules))
(multiboot-modules boot-parameters-multiboot-modules)
(version boot-parameters-version ;positive integer
(default %boot-parameters-version)))
(define (ensure-not-/dev device)
"If DEVICE starts with a slash, return #f. This is meant to filter out
@ -359,12 +366,18 @@ file system labels."
(warning (G_ "unrecognized uuid ~a at '~a'~%") x (port-filename port))
#f)))
;; New versions are not backward-compatible, so only accept past and current
;; versions, not future ones.
(define (version? n)
(member n (iota (1+ %boot-parameters-version))))
(match (read port)
(('boot-parameters ('version 0)
(('boot-parameters ('version (? version? version))
('label label) ('root-device root)
('kernel kernel)
rest ...)
(boot-parameters
(version version)
(label label)
(root-device (device-sexp->device root))
@ -1500,7 +1513,7 @@ being stored into the \"parameters\" file)."
system-kernel-arguments?)))
(scheme-file "parameters"
#~(boot-parameters
(version 0)
(version #$(boot-parameters-version params))
(label #$(boot-parameters-label params))
(root-device
#$(device->sexp

2
tests/boot-parameters.scm
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@ -101,7 +101,7 @@
;; Call read-boot-parameters with the desired string as input.
(define* (test-read-boot-parameters
#:key
(version 0)
(version %boot-parameters-version)
(bootloader-name 'grub)
(bootloader-menu-entries '())
(label %default-label)