LibraryInfo queries remote library to get info about the image.

NormalizedImageRef appends tag 'latest' if the passed ref does not have any tag or digest already.

ParseRef constructs image reference based on imgRef.

Pull pulls image referenced by ref and saves it to the passed location.

IDLen reflects number of symbols in image unique ID.

ErrIsUsed notifies that image is currently being used by someone.

ErrNotFound notifies that image is not found thus cannot be pulled.

ErrNotLibrary is used when user tried to get library image metadata but provided non library image reference.

Info represents image stored on the host filesystem.

Reference holds parsed content of image reference.