def viz
output_file = File.expand_path(options[:file])
output_format = options[:format]
graph = Graph.new(Bundler.load, output_file, options[:version], options[:requirements], options[:format])
begin
graph.viz
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