ApplyLayer parses a diff in the standard layer format from `layer`, and applies it to the directory `dest`.

ApplyUncompressedLayer parses a diff in the standard layer format from `layer`, and applies it to the directory `dest`.

NewArchiver returns a new Archiver which uses chrootarchive.Untar.

Untar reads a stream of bytes from `archive`, parses it as a tar archive, and unpacks it into the directory at `dest`.

UntarUncompressed reads a stream of bytes from `archive`, parses it as a tar archive, and unpacks it into the directory at `dest`.