Coalescer

A coalescer must compute the final contents of a manifest given the artifacts found at each layer.

package indexer // import "github.com/quay/claircore/indexer"

type Coalescer interface {
	Coalesce(ctx context.Context, artifacts []*LayerArtifacts) (*claircore.IndexReport, error)
}
    Coalescer takes a set of layers and creates coalesced IndexReport.

    A coalesced IndexReport should provide only the packages present in the
    final container image once all layers were applied.

package indexer // import "github.com/quay/claircore/indexer"

type LayerArtifacts struct {
	Hash  claircore.Digest
	Pkgs  []*claircore.Package
	Dist  []*claircore.Distribution // each layer can only have a single distribution
	Repos []*claircore.Repository
	Files []claircore.File
}
    LayerArifact aggregates the artifacts found within a layer.

A Coalsecer implementation is free to determine this computation given the artifacts found in a layer. A Coalescer is called with a slice of LayerArtifacts structs. The manifest's layer ordering is preserved in the provided slice.