List all cucumber step definitions

custom_cucumber.rake

# Original Source: http://www.natontesting.com/2010/01/11/updated-script-to-list-all-cucumber-step-definitions/

namespace :cucumber do
  desc "Generate all step definitions report, opens file in a new browser if you have launchy gem"
  task :step_definitions do
    step_definition_dir = "./features/step_definitions"
    output_file = "step_definitions.html"
    
    f = File.new(output_file, "w")

    f << "<table><th>Regex</th><th>Modifiers</th><th>Step Definition Args</th><th>Source file</th>"

    Dir.glob(File.join(step_definition_dir,'**/*.rb')).each do |step_file|
      File.new(step_file).read.each_line do |line|
        next unless line =~ /^\s*(?:Given|When|Then)\(?\s*\//
        matches = /(?:Given|When|Then)\s*\(?\/(.*)\/([imxo]*)\)?\s*do\s*(?:$|\|(.*)\|)/.match(line).captures
        matches << step_file
        f << "<tr>"
        f << "<td>#{matches[0]}</td>"
        f << "<td>#{matches[1]}</td>"
        f << "<td>#{matches[2]}</td>"
        f << "<td><a href=\"#{matches[3]}\">#{matches[3]}</a></td>"
        f << "</tr>"
      end
    end

    f << "</table>"
    f.close
    
    begin 
      require 'launchy'
      Launchy::Browser.run(output_file)
    rescue LoadError
    end
  end
end