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system: image: Remove "image-root" when building raw disk-images.

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The "image-root" derivation output is used as a temporary directory that is
passed to mke2fs and mkdosfs later on. By merging the creation of this
directory and the production of partition images, we can get rid of the
derivation.

As mke2fs and mkdosfs are not able to override file permissions, call those
commands with fakeroot. This way, all the image files will be owned by root,
even if image generation is done in an unprivilegded context.

* gnu/system/image.scm (system-disk-image): Merge "image-root" and
"iso9660-image" derivations so that we spare an extra derivation. Also add
"fakeroot" and its runtime dependencies to the inputs.
* gnu/build/image.scm (make-ext-image, make-vfat-image): Make sure that mke2fs
and mkdosfs are respectively called by fakeroot.
This commit is contained in:
Mathieu Othacehe 2020-06-22 17:40:10 +02:00
parent cf14e67963
commit 7f75a7ec08
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GPG key ID: 8354763531769CA6
2 changed files with 16 additions and 16 deletions
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5
gnu/build/image.scm
View file

@ -77,7 +77,7 @@ (define* (make-ext-image partition target root
(uuid (partition-uuid partition))
(journal-options "lazy_itable_init=1,lazy_journal_init=1"))
(apply invoke
`("mke2fs" "-t" ,fs "-d" ,root
`("fakeroot" "mke2fs" "-t" ,fs "-d" ,root
"-L" ,label "-U" ,(uuid->string uuid)
"-E" ,(format #f "root_owner=~a:~a,~a"
owner-uid owner-gid journal-options)
@ -93,7 +93,8 @@ (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"
(invoke "fakeroot" "mkdosfs" "-n" label "-C" target
"-F" "16" "-S" "1024"
(size-in-kib
(if (eq? size 'guess)
(estimate-partition-size root)

27
gnu/system/image.scm
View file

@ -255,18 +255,24 @@ (define (partition-image partition)
(graph (match inputs
(((names . _) ...)
names)))
(root-builder
(type (partition-file-system partition))
(image-builder
(with-imported-modules*
(let* ((initializer #$(partition-initializer partition)))
(let ((initializer #$(partition-initializer partition))
(inputs '#+(list e2fsprogs fakeroot dosfstools mtools
sed coreutils))
(image-root "tmp-root"))
(sql-schema #$schema)
(set-path-environment-variable "PATH" '("bin" "sbin") inputs)
;; Allow non-ASCII file names--e.g., 'nss-certs'--to be
;; decoded.
(setenv "GUIX_LOCPATH"
#+(file-append glibc-utf8-locales "/lib/locale"))
(setlocale LC_ALL "en_US.utf8")
(initializer #$output
(initializer image-root
#:references-graphs '#$graph
#:deduplicate? #f
#:system-directory #$os
@ -277,19 +283,12 @@ (define (partition-image partition)
#+(bootloader-installer bootloader)
#:bootcfg #$bootcfg
#:bootcfg-location
#$(bootloader-configuration-file bootloader)))))
(image-root
(computed-file "partition-image-root" root-builder
#:options `(#:references-graphs ,inputs)))
(type (partition-file-system partition))
(image-builder
(with-imported-modules*
(let ((inputs '#+(list e2fsprogs dosfstools mtools)))
(set-path-environment-variable "PATH" '("bin" "sbin") inputs)
#$(bootloader-configuration-file bootloader))
(make-partition-image #$(partition->gexp partition)
#$output
#$image-root)))))
(computed-file "partition.img" image-builder)))
image-root)))))
(computed-file "partition.img" image-builder
#:options `(#:references-graphs ,inputs))))
(define (partition->config partition)
;; Return the genimage partition configuration for PARTITION.