During import, if an image does not match the host's platform,
it won't have any children labels set, which will result in the
Garbage Collector deleting its content later, resulting in an
unusable image. In this case, we should fail early.
This can still be bypassed by using ctr import --all-platforms.
Signed-off-by: Claudiu Belu <cbelu@cloudbasesolutions.com>
This parallels the implementation of windowsDiff.Apply, including
bouncing very briefly though archive.WriteDiff and then straight back
out into Windows-specific code.
It's mostly pulling existing mechanisms from non-Windows Compare or
Windows Apply, and highlights that there's probably a lot of scope for
refactoring on top of this.
Now the export-related integration tests pass CI on Windows.
Signed-off-by: Paul "TBBle" Hampson <Paul.Hampson@Pobox.com>
