Method AddPath

dive/filetree/file_tree.go:244–282

AddPath adds a new node to the tree with the given payload

(filepath string, data FileInfo)

// AddPath adds a new node to the tree with the given payload
func (tree *FileTree) AddPath(filepath string, data FileInfo) (*FileNode, []*FileNode, error) {
	filepath = path.Clean(filepath)
	if filepath == "." {
		return nil, nil, fmt.Errorf("cannot add relative path '%s'", filepath)
	}
	nodeNames := strings.Split(strings.Trim(filepath, "/"), "/")
	node := tree.Root
	addedNodes := make([]*FileNode, 0)
	for idx, name := range nodeNames {
		if name == "" {
			continue
		}
		// find or create node
		if node.Children[name] != nil {
			node = node.Children[name]
		} else {
			// don't add paths that should be deleted
			if strings.HasPrefix(name, doubleWhiteoutPrefix) {
				return nil, addedNodes, nil
			}

			// don't attach the payload. The payload is destined for the
			// Path's end node, not any intermediary node.
			node = node.AddChild(name, FileInfo{})
			addedNodes = append(addedNodes, node)

			if node == nil {
				// the child could not be added
				return node, addedNodes, fmt.Errorf("could not add child node: '%s' (path:'%s')", name, filepath)
			}
		}

		// attach payload to the last specified node
		if idx == len(nodeNames)-1 {
			node.Data.FileInfo = data
		}
	}
	return node, addedNodes, nil
}

// RemovePath removes a node from the tree given its path.
func (tree *FileTree) RemovePath(path string) error {