image

type ChainLayer interface {
	// FS output an filesystem that consist of the files found in the layer n and all previous layers
	// (layer 0, layer 1, ..., layer n).
	FS() scalibrfs.FS
	// Index is the index of the latest layer in the layer chain.
	Index() int
	// ChainID is the layer chain ID (sha256 hash) of the layer in the container image.
	// https://github.com/opencontainers/image-spec/blob/main/config.md#layer-chainid
	ChainID() digest.Digest
	// Layer is the latest layer in the layer chain.
	Layer() Layer
}

type File interface {
	fs.File
	RealFilePath() string
}

type History struct {
	Created []int
	Edited  []int
	Deleted []int
}

type Image interface {
	// Layers returns the layers of the image.
	Layers() ([]Layer, error)
	// ChainLayers returns the chain layers of the image.
	ChainLayers() ([]ChainLayer, error)
	// FS returns a SCALIBR compliant filesystem that represents the image.
	FS() scalibrfs.FS
}

type Layer interface {
	// FS outputs a filesystem that consist of the files found in the layer. This includes files that
	// were added or modified. Whiteout files are also included in the filesystem if files or
	// directories from previous layers were removed.
	FS() scalibrfs.FS
	// IsEmpty signifies whether the layer is empty. This should correspond with an empty filesystem
	// produced by the FS method.
	IsEmpty() bool
	// DiffID is the hash of the uncompressed layer. Will be an empty string if the layer is empty.
	DiffID() digest.Digest
	// Command is the specific command that produced the layer.
	Command() string
}