Customizing graphviz options for `bundle viz`

bundle-viz.rb

require 'graphviz'
require 'bundler'

module Bundler
  class Graph
    class GraphVizClient
      def g
        @g ||= ::GraphViz.digraph(@graph_name, {
          :use => 'neato',
          :concentrate => true,
          :normalize => true,
          :nodesep => '0.2',
          :overlap => false
        }) do |g|
          g.edge[:weight]   = 2
          g.edge[:fontname] = g.node[:fontname] = 'Arial, Helvetica, SansSerif'
          g.edge[:fontsize] = 12
        end
      end
    end
  end
end

output_file = File.expand_path('gem_graph')
graph = Bundler::Graph.new(Bundler.load, output_file, true, true)
graph.viz