type Attestation = result.Attestation[cache.ImmutableRef]

type Config struct {
	// contains filtered or unexported fields
}

type DescriptorReference interface {
	Release() error
	Descriptor() ocispecs.Descriptor
}

type ExportBuildInfo struct {
	Ref         string
	InlineCache exptypes.InlineCache
	SessionID   string
}

type Exporter interface {
	Resolve(context.Context, int, map[string]string) (ExporterInstance, error)
}

type ExporterInstance interface {
	ID() int
	Name() string
	Config() *Config
	Type() string
	Attrs() map[string]string

	// Export performs the export operation and optionally returns a finalize
	// callback. This separates work that must run sequentially from work that
	// can run in parallel with other exports (e.g., cache export).
	//
	// For exporters that complete all work during Export (tar, local),
	// return nil for the finalize callback.
	Export(ctx context.Context, src *Source, buildInfo ExportBuildInfo) (
		response map[string]string,
		finalize FinalizeFunc,
		ref DescriptorReference,
		err error,
	)
}

type FinalizeFunc func(ctx context.Context) error

type Source = result.Result[cache.ImmutableRef]