block_copy

func CopyBlockDAG ¶

func CopyBlockDAG(
	ctx context.Context,
	rootRef *block.BlockRef,
	rootCtor block.Ctor,
	src block.StoreOps,
	dest block.StoreOps,
) error

CopyBlockDAG copies all blocks reachable from rootRef from src to dest. Missing blocks are written to dest. Existing destination blocks are still decoded and traversed when their constructors are known, so a partial destination DAG can be completed. rootCtor is the constructor for the root block type. For child blocks, uses BlockWithRefs.GetBlockRefCtor to get constructors. If a child block's constructor is nil, the block data is still copied but its children cannot be traversed (leaf copy).