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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020, 2022 Mathieu Othacehe <othacehe@gnu.org>
;;;
;;; 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 image)
#:use-module (guix platform)
#:use-module (guix records)
#:use-module (guix diagnostics)
#:use-module (guix i18n)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-35)
#:export (partition
partition?
partition-device
partition-size
partition-offset
partition-file-system
partition-file-system-options
partition-label
partition-uuid
partition-flags
partition-initializer
image
image?
image-name
image-format
image-platform
image-size
image-operating-system
image-partition-table-type
image-partitions
image-compression?
image-volatile-root?
image-shared-store?
image-shared-network?
image-substitutable?
image-type
image-type?
image-type-name
image-type-constructor
os->image
os+platform->image))
;;;
;;; Sanitizers.
;;;
;; Image and partition sizes can be either be a size in bytes or the 'guess
;; symbol denoting that the size should be estimated by Guix, according to the
;; image content.
(define-with-syntax-properties (validate-size (value properties))
(unless (and value
(or (eq? value 'guess) (integer? value)))
(raise
(make-compound-condition
(condition
(&error-location
(location (source-properties->location properties))))
(formatted-message
(G_ "size (~a) can only be 'guess or a numeric expression ~%")
value 'field))))
value)
;;;
;;; Partition record.
;;;
;; The partition offset should be a bytes count as an integer.
(define-with-syntax-properties (validate-partition-offset (value properties))
(unless (and value (integer? value))
(raise
(make-compound-condition
(condition
(&error-location
(location (source-properties->location properties))))
(formatted-message
(G_ "the partition offset (~a) can only be a \
numeric expression ~%") value 'field))))
value)
;; The supported partition flags.
(define-with-syntax-properties (validate-partition-flags (value properties))
(let ((bad-flags (lset-difference eq? value '(boot esp))))
(unless (and (list? value) (null? bad-flags))
(raise
(make-compound-condition
(condition
(&error-location
(location (source-properties->location properties))))
(formatted-message
(G_ "unsupported partition flag(s): ~a ~%") bad-flags)))))
value)
(define-record-type* <partition> partition make-partition
partition?
(size partition-size ;size in bytes as integer or 'guess
(sanitize validate-size))
(offset partition-offset
(default 0) ;offset in bytes as integer
(sanitize validate-partition-offset))
(file-system partition-file-system
(default "ext4")) ;string
(file-system-options partition-file-system-options
(default '())) ;list of strings
(label partition-label) ;string
(uuid partition-uuid
(default #f)) ;<uuid>
(flags partition-flags
(default '()) ;list of symbols
(sanitize validate-partition-flags))
(initializer partition-initializer
(default #f))) ;gexp | #f
;;;
;;; Image record.
;;;
(define-syntax-rule (define-set-sanitizer name field set)
"Define NAME as a procedure or macro that raises an error if passed a value
that is not in SET, mentioning FIELD in the error message."
(define-with-syntax-properties (name (value properties))
(unless (memq value 'set)
(raise
(make-compound-condition
(condition
(&error-location
(location (source-properties->location properties))))
(formatted-message (G_ "~s: invalid '~a' value") value 'field))))
value))
;; The supported image formats.
(define-set-sanitizer validate-image-format format
(disk-image compressed-qcow2 docker iso9660))
;; The supported partition table types.
(define-set-sanitizer validate-partition-table-type partition-table-type
(mbr gpt))
(define-record-type* <image>
image make-image
image?
(name image-name ;symbol
(default #f))
(format image-format ;symbol
(sanitize validate-image-format))
(platform image-platform ;<platform>
(default #f))
(size image-size ;size in bytes as integer
(default 'guess)
(sanitize validate-size))
(operating-system image-operating-system ;<operating-system>
(default #f))
(partition-table-type image-partition-table-type ; 'mbr or 'gpt
(default 'mbr)
(sanitize validate-partition-table-type))
(partitions image-partitions ;list of <partition>
(default '()))
(compression? image-compression? ;boolean
(default #t))
(volatile-root? image-volatile-root? ;boolean
(default #t))
(shared-store? image-shared-store? ;boolean
(default #f))
(shared-network? image-shared-network? ;boolean
(default #f))
(substitutable? image-substitutable? ;boolean
(default #t)))
;;;
;;; Image type.
;;;
;; The role of this record is to provide a constructor that is able to turn an
;; <operating-system> record into an <image> record. Some basic <image-type>
;; records are defined in the (gnu system image) module. They are able to
;; turn an <operating-system> record into an EFI or an ISO 9660 bootable
;; image, a Docker image or even a QCOW2 image.
;;
;; Other <image-type> records are defined in the (gnu system images ...)
;; modules. They are dedicated to specific machines such as Novena and Pine64
;; SoC boards that require specific images.
;;
;; All the available <image-type> records are collected by the 'image-modules'
;; procedure. This allows the "guix system image" command to turn a given
;; <operating-system> record into an image, thanks to the specified
;; <image-type>. In that case, the <image-type> look up is done using the
;; name field of the <image-type> record.
(define-record-type* <image-type>
image-type make-image-type
image-type?
(name image-type-name) ;symbol
(constructor image-type-constructor)) ;<operating-system> -> <image>
;;;
;;; Image creation.
;;;
(define* (os->image os #:key type)
"Use the image constructor from TYPE, an <image-type> record to turn the
given OS, an <operating-system> record into an image and return it."
(let ((constructor (image-type-constructor type)))
(constructor os)))
(define* (os+platform->image os platform #:key type)
"Use the image constructor from TYPE, an <image-type> record to turn the
given OS, an <operating-system> record into an image targeting PLATFORM, a
<platform> record and return it."
(image
(inherit (os->image os #:type type))
(platform platform)))
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