Module: RGL::Graph

Defined in:
lib/cocoapods-binary-cache/dependencies_graph/graph_visualizer.rb

Instance Method Summary collapse

Instance Method Details

#to_dot_graph(options) ⇒ Object 



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# File 'lib/cocoapods-binary-cache/dependencies_graph/graph_visualizer.rb', line 9

def to_dot_graph(options)
  highlight_nodes = options[:highlight_nodes] || Set.new
  options["name"] ||= self.class.name.gsub(/:/, "_")
  fontsize = options["fontsize"] || "12"
  graph = (directed? ? DOT::Digraph : DOT::Graph).new(options)
  edge_class = directed? ? DOT::DirectedEdge : DOT::Edge
  vertex_options = options["vertex"] || {}
  edge_options = options["edge"] || {}

  each_vertex do |v|
    default_vertex_options = {
      "name" => vertex_id(v),
      "fontsize" => fontsize,
      "label" => vertex_label(v),
      "style" => "filled"
    }
    default_vertex_options.merge!("color" => "red", "fillcolor" => "red") if highlight_nodes.include?(v)
    each_vertex_options = default_vertex_options.merge(vertex_options)
    vertex_options.each { |option, val| each_vertex_options[option] = val.call(v) if val.is_a?(Proc) }
    graph << DOT::Node.new(each_vertex_options)
  end

  each_edge do |u, v|
    default_edge_options = {
      "from" => vertex_id(u),
      "to" => vertex_id(v),
      "fontsize" => fontsize
    }
    each_edge_options = default_edge_options.merge(edge_options)
    edge_options.each { |option, val| each_edge_options[option] = val.call(u, v) if val.is_a?(Proc) }
    graph << edge_class.new(each_edge_options)
  end

  graph
end

#write_to_graphic_file(options) ⇒ Object 



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# File 'lib/cocoapods-binary-cache/dependencies_graph/graph_visualizer.rb', line 45

def write_to_graphic_file(options)
  output_path = Pathname.new(options[:output_path])
  fmt = output_path.extname.delete_prefix(".")
  dotfile = output_path.sub_ext(".dot")

  File.open(dotfile, "w") do |f|
    f << to_dot_graph(options).to_s
  end

  unless system("dot -T#{fmt} #{dotfile} -o #{output_path}")
    message = <<~HEREDOC
      Error executing dot. Did you install GraphViz?
      Try installing it via Homebrew: `brew install graphviz`.
      Visit https://graphviz.org/download/ for more installation instructions.
    HEREDOC
    raise message
  end
  output_path
end