// CopyReachableChunksP copies to |sink| all chunks reachable from (and including) |r|, but that are not in the subtree rooted at |exclude|
func CopyReachableChunksP(source, sink DataStore, sourceRef, exclude ref.Ref, concurrency int) {
excludeRefs := map[ref.Ref]bool{}
if !exclude.IsEmpty() {
mu := sync.Mutex{}
excludeCallback := func(r ref.Ref) bool {
mu.Lock()
excludeRefs[r] = true
mu.Unlock()
return false
}
walk.SomeChunksP(exclude, source, excludeCallback, concurrency)
}
copyCallback := func(r ref.Ref) bool {
return excludeRefs[r]
}
copyWorker(source, sink.transitionalChunkSink(), sourceRef, copyCallback, concurrency)
}
func copyWorker(source DataStore, sink chunks.ChunkSink, sourceRef ref.Ref, stopFn walk.SomeChunksCallback, concurrency int) {
tcs := &teeDataSource{source.transitionalChunkStore(), sink}
walk.SomeChunksP(sourceRef, tcs, stopFn, concurrency)
}