cucumber.rake

begin
  tags = ['~@slow', '~@stable']
 
  namespace :cucumber do
    Cucumber::Rake::Task.new(:webrat) do |t|  
      t.profile = "webrat"
    end
    task :webrat => 'db:test:prepare'
  end
 
  desc "shortcut for cucumber:webrat"
  task :features => 'cucumber:webrat'


  namespace :features do
    Cucumber::Rake::Task.new(:quick, "Run quick Cucumber features  -slow, -stable") do |t|
      t.profile = "webrat"
      t.cucumber_opts = '--tags ~@slow,~@stable'
    end
    task :features_rcov => 'db:test:prepare'

    Cucumber::Rake::Task.new(:rcov, "Run Cucumber features with RCov") do |t|
      t.profile = "webrat"
      t.rcov = true
      t.rcov_opts << '-o coverage'
      t.rcov_opts << '--text-report'
      t.rcov_opts << '--exclude features\/,spec\/'
      t.rcov_opts << '--sort coverage'
    end
    task :features_rcov => 'db:test:prepare'


    namespace :rcov do
      Cucumber::Rake::Task.new(:redundant, "Search for unused step definitions using RCov") do |t|
        t.profile = "webrat"
        t.rcov = true
        t.rcov_opts << '-o coverage'
        t.rcov_opts << '--text-report'
        t.rcov_opts << '--exclude spec\/'
        t.rcov_opts << '--sort coverage'
      end
      task :redundant => 'db:test:prepare'
    end
  end
  
rescue NameError
  puts $!
end

rake output

$ rake gems
(in /Users/leehambley/example.com/)
uninitialized constant Cucumber
Missing source files, have you tried `rake gems:install` no such file to load -- cucumber/rake/task
 - [ ] haml-edge = 2.1.12
 - [ ] chriseppstein-compass = 0.6.15
 - [I] sqlite3-ruby = 1.2.4
 - [I] diabolo-webrat = 0.4.4.2
    - [I] nokogiri >= 1.2.0
 - [ ] rspec-rails = 1.2.6
 - [ ] rspec = 1.2.6
 - [ ] cucumber = 0.3.9
 - [ ] rcov 
 - [I] raldred-coderay 

I = Installed
F = Frozen
R = Framework (loaded before rails starts)

Rakefile

require(File.join(File.dirname(__FILE__), 'config', 'boot'))

require 'rake'
require 'rake/testtask'
require 'rake/rdoctask'
require 'tasks/rails'
require 'tasks/rails'

begin
  require 'cucumber/rake/task'
rescue LoadError
  puts "Missing source files, have you tried \`rake gems:install\` #{$!}"
end

snip-environment.rb

config.gem "haml-edge",             :lib => 'haml',         :version => '=2.1.12'
config.gem "chriseppstein-compass", :lib => 'compass',      :version => '=0.6.15'
config.gem "sqlite3-ruby",          :lib => 'sqlite3',      :version => '=1.2.4'

config.gem "diabolo-webrat",        :lib => 'webrat',       :version => '=0.4.4.2',     :env => 'test'
config.gem "rspec-rails",           :lib => 'spec/rails',   :version => '=1.2.6',       :env => 'test'
config.gem "rspec",                 :lib => "spec",         :version => '=1.2.6',       :env => 'test'
config.gem "cucumber",                                      :version => '=0.3.9',       :env => 'test'
config.gem "rcov",                                                                      :env => 'test'
config.gem "raldred-coderay",       :lib => 'coderay',                                  :env => 'test'