cucumber.yml

<%
@selenium_opts = '-r features/support/selenium.rb'
@webrat_opts   = '-r features/support/webrat.rb'

@rerun = File.file?('rerun.txt') ? IO.read('rerun.txt') : ""

def rerun?
  !@rerun.to_s.strip.empty?
end

def target_opts
  @rerun =~ /js_dependent/ ? @selenium_opts : @webrat_opts
end

rerun_opts = "#{@rerun} #{target_opts} --format pretty" if rerun? 

include_opts = '-r features/step_definitions -r features/support/env.rb'

selenium_all_opts = '--format progress features/js_dependent' unless rerun?
webrat_all_opts   = '--format progress features -e features/js_dependent' unless rerun?

std_opts = "#{rerun_opts} #{include_opts} --format rerun --out rerun.txt --strict --tags ~@wip"
wip_opts = "#{rerun_opts} #{include_opts} --tags @wip:3 --wip"
%>

default: <%= "#{std_opts} #{@webrat_opts} #{webrat_all_opts}" %>
wip:     <%= "#{wip_opts} #{@webrat_opts} #{webrat_all_opts}" %>

selenium:     <%= "#{std_opts} #{@selenium_opts} #{selenium_all_opts}" %>
selenium_wip: <%= "#{wip_opts} #{@selenium_opts} #{selenium_all_opts}" %>