wic: Add --change-directory argument

This option allows to specify which part of a rootfs is going to be
included, the same way the -C argument on tar.

Thanks to this option we can make sure the permissions and usernames
on the target partition are respected, and also simplify the creation of
splitted partitons, not neeting to invoke external vars or using .wks.in
files. Eg:

part / --source rootfs --ondisk sda --fstype=ext4 --exclude-path=etc/   
part /etc --source rootfs --fstype=ext4 --change-directory=etc

Cc: Paul Barker <pbarker@konsulko.com>
(From OE-Core rev: d17b03e49b09f1a2db3642823522ac39e7c3c301)

Signed-off-by: Ricardo Ribalda Delgado <ricardo@ribalda.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 2265d089a58e1f78f26d623ee667c420cb1c3bd4)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/scripts/lib/wic/partition.py b/scripts/lib/wic/partition.py
index cc0382ce54..286c7867cb 100644
--- a/scripts/lib/wic/partition.py
+++ b/scripts/lib/wic/partition.py
@@ -31,6 +31,7 @@ class Partition():
         self.extra_space = args.extra_space
         self.exclude_path = args.exclude_path
         self.include_path = args.include_path
+        self.change_directory = args.change_directory
         self.fsopts = args.fsopts
         self.fstype = args.fstype
         self.label = args.label