-n 参数的实现

-n 参数说明 ¹

"n", "Only chunk and hash - do not write to disk."

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代码实现

在 func (api *UnixfsAPI) Add(ctx context.Context, files files.Node, opts ...options.UnixfsAddOption) (path.Resolved, error) 接口中有类似如下代码

	if settings.OnlyHash {
		node, err := getOrCreateNilNode()
		if err != nil {
			return nil, err
		}
		addblockstore = node.Blockstore
		exch = node.Exchange
		pinning = node.Pinning
	}

	if settings.OnlyHash {
		md := dagtest.Mock()
		emptyDirNode := ft.EmptyDirNode()
		// Use the same prefix for the "empty" MFS root as for the file adder.
		emptyDirNode.SetCidBuilder(fileAdder.CidBuilder)
		mr, err := mfs.NewRoot(ctx, md, emptyDirNode, nil)
		if err != nil {
			return nil, err
		}

		fileAdder.SetMfsRoot(mr)
	}

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1. docs. ↩