to_dot(options = {})
public
@param [Hash] options options for dot output.
@return [String] Returns a dot format
representation of the graph
# File lib/rubygems/resolver/molinillo/lib/molinillo/dependency_graph.rb, line 103
def to_dot(options = {})
edge_label = options.delete(:edge_label)
raise ArgumentError, "Unknown options: #{options.keys}" unless options.empty?
dot_vertices = []
dot_edges = []
vertices.each do |n, v|
dot_vertices << " #{n} [label=\"{#{n}|#{v.payload}}\"]"
v.outgoing_edges.each do |e|
label = edge_label ? edge_label.call(e) : e.requirement
dot_edges << " #{e.origin.name} -> #{e.destination.name} [label=#{label.to_s.dump}]"
end
end
dot_vertices.uniq!
dot_vertices.sort!
dot_edges.uniq!
dot_edges.sort!
dot = dot_vertices.unshift('digraph G {').push('') + dot_edges.push('}')
dot.join("\n")
end
