Format Docker Image Tree for D3.js Library

docker_image_tree.rb

  
    images = Docker::Image.all(all: 1)                                                                   

    nodes = images.each_with_object({}) do |image, memo|
      memo[image.id] = {
        id: image.id,
        name: image.id[0..11],
        parent_id: image.info['ParentId'],
        children: []
      }
    end

    nodes.each do |_, node|
      next if node[:parent_id] == ''
      nodes[node[:parent_id]][:children] << node
    end

    root = nodes.find do |_, node|
      node[:parent_id] == ''
    end

    respond_with root[1]
  end