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06a53abe68
This patch equips the publish tool to handle system images.
System images reside at <depot-user/image/. The directory contains an
index file that contains the meta information of the available images
in XML form, e.g.,
<index>
<image name="sculpt-pinephone-2023-01-19" board="pinephone">
<info text="initial version"/>
</image>
</index>
To publish a new version of the index:
./tool/depot/publish <depot-user>/image/index
Each system image comes in two forms, a bootable disk image and an
archive of the boot directory. The bootable disk image can be used to
install a new system from scratch by copying the image directly ot a
block device. It contains raw block data. The archive of the boot
directory contains the content needed for an on-target system update to
this version. Within the depot, this archive a directory - named after
the image - that contains the designated content of the boot directory
on target. Depending on the board, it may contain only a single file
loaded by the boot loader (e.g., uImage), or several boot modules, or
even the boot-loader configuration.
To publish both forms:
./tool/depot/publish <depot-user>/image/<image-name>
This results in the following - accompanied by their respective .sig
files - in the public directory:
<depot-user>/image/<image-name>.img.gz (disk image)
<depot-user>/image/<image-name>.tar.xz (boot archive)
<depot-user>/image/<image-name>.zip (disk image)
The .zip file contains the .img file. It is provided for users who
download the image on a system with no support for .gz.
Fixes #4735
Issue #4744