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wic: Add --embed-rootfs argument

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This option adds the content of a rootfs on a specific location on the
rootfs.

It is very useful for making a partition that contains the rootfs for a
host and a target Eg:

/ -> Roofs for the host
/export/ -> Rootfs for the target (which will netboot)

Although today we support making a partition for "/export" this might
not be compatible with some upgrade systems, or we might be limited by
the number of partitions.

With this patch we can use something like:

part / --source rootfs --embed-rootfs target-image /export --embed-rootfs target-image2 /export2

on the .wks file.

(From OE-Core rev: efdcf94801f6abe8e4099e324d9a3deccd8d4384)

Signed-off-by: Ricardo Ribalda Delgado <ricardo@ribalda.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Ricardo Ribalda Delgado
2020-03-04 15:49:36 +01:00
committed by Richard Purdie
parent 6bac089383
commit 242412656b
4 changed files with 31 additions and 1 deletions
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8
scripts/lib/wic/help.py
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@@ -980,6 +980,14 @@ DESCRIPTION
copies. This option only has an effect with the rootfs
source plugin.
--embed-rootfs: This option is specific to wic. It embeds a rootfs into
the given path to the resulting image. The option
contains two fields, the roofs and the path, separated
by a space. The rootfs follows the same logic as the
rootfs-dir argument. Multiple options can be provided
in order to embed multiple rootfs. This option only has
an effect with the rootfs source plugin.
--extra-space: This option is specific to wic. It adds extra
space after the space filled by the content
of the partition. The final size can go