lookup

# File railties/lib/rails_generator/lookup.rb, line 113
        def lookup(generator_name)
          @found ||= {}
          generator_name = generator_name.to_s.downcase
          @found[generator_name] ||= cache.find { |spec| spec.name == generator_name }
          unless @found[generator_name] 
            chars = generator_name.scan(/./).map{|c|"#{c}.*?"}
            rx = /^#{chars}$/
            gns = cache.select{|spec| spec.name =~ rx }
            @found[generator_name] ||= gns.first if gns.length == 1
            raise GeneratorError, "Pattern '#{generator_name}' matches more than one generator: #{gns.map{|sp|sp.name}.join(', ')}" if gns.length > 1
          end
          @found[generator_name] or raise GeneratorError, "Couldn't find '#{generator_name}' generator"
        end