ExtractLayer is like ExtractLayers but applied to a single layer.

ExtractLayers fetches the image layers represented by the list of descriptors and extracts them at the dst file path.

FetchImage retrieves an image from src.

FetchLayer returns a reader exposing the uncompressed content of an image layer retrieved from src and represented by desc.

RootFS returns a slice of files opened on the tar files of layers making the root file system of a container image.

ImageCache is an implementation of oras.ReadOnlyRegistry which copies remote images fetched by the program to a local store for faster retrieval.