class Bundler::CLI

def viz
  output_file = File.expand_path(options[:file])
  graph = Graph.new( Bundler.load )
  begin
    graph.viz(output_file, options[:version], options[:requirements])
    Bundler.ui.info output_file
  rescue LoadError => e
    Bundler.ui.error e.inspect
    Bundler.ui.warn "Make sure you have the graphviz ruby gem. You can install it with:"
    Bundler.ui.warn "`gem install ruby-graphviz`"
  rescue StandardError => e
    if e.message =~ /GraphViz not installed or dot not in PATH/
      Bundler.ui.error e.message
      Bundler.ui.warn "The ruby graphviz gem requires GraphViz to be installed"
    else
      raise
    end
  end
end