allow skipping empty layer detection on cache export #1993
Merged
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fix #1992
Moby image exporter does not remove empty layers causing inline cache to go out of sync. This allows behavior to be configured so it can be turned off in moby.
Regression from 85dd12d
There is still an issue that empty layers (ones optimized after differ, not metadata commands) can get out of sync in the history array of the image after cache import. Don't really know what to do about it as there is no information to determine that a
RUN
command didn't create a layer without running it.Signed-off-by: Tonis Tiigi tonistiigi@gmail.com