Module: Graphviz

Defined in:
lib/graphviz.rb,
lib/graphviz/graph.rb,
lib/graphviz/version.rb

Defined Under Namespace

Classes: Edge, EdgeNode, Graph, Node, OutputError

Constant Summary collapse

VERSION = 
"0.0.2"

Class Method Summary collapse

Class Method Details

.output(graph, options = {}) ⇒ Object 



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# File 'lib/graphviz.rb', line 30

def self.output(graph, options = {})
	text = graph.to_dot
	
	output_format = options[:format]
	
	if options[:path]
		# Grab the output format from the file name:
		if options[:path] =~ /\.(.*?)$/
			output_format ||= $1
		end
		
		output_file = File.open(options[:path], "w")
	else
		output_file = IO.pipe
	end
	
	RExec::Task.open(["dot", "-T#{output_format}"], :out => output_file) do |task|
		task.input.puts(graph.to_dot)
		task.input.close
		
		status = task.wait
		
		if status != 0
			raise OutputError.new(task.error.read)
		end
		
		# Did we use a local pipe for output?
		if Array === output_file
			return task.output.read
		end
	end
end