layers.Wipe(): try to remove layers before their parents #1342
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When removing layers, try to remove layers before removing their parents, as the lower-level driver may enforce the dependency beyond what the higher-level logic does or knows. Do this by sorting by creation time as an attempt at flattening the layer tree into an ordered list. It won't be correct if a parent layer needed to be recreated, but it's more likely to be correct otherwise. Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
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When removing layers, try to remove layers before removing their parents, as the lower-level driver may enforce the dependency beyond what the higher-level logic does or knows.
Do this by sorting by creation time as an attempt at flattening the layer tree into an ordered list. It won't be correct if a parent layer needed to be recreated, but it's more likely to be correct otherwise.