Sample rails rake task for continous integration and deployment

ci.rake

namespace :ci do
  task :copy_yml do
    sh "cp #{Rails.root}/config/example_database.yml #{Rails.root}/config/database.yml"
  end

  desc "Prepare for CI and run entire test suite"
  task :build do
    Rake::Task['db:migrate'].invoke
    Rake::Task['db:test:prepare'].invoke
    Rake::Task['test:units'].invoke    
    Rake::Task['cucumber:ci'].invoke    
  end
  
  task :deploy do
    sh "cap staging deploy"
  end
  
  desc "Prepare for CI and run entire test suite"
  task :run => ['ci:copy_yml', 'ci:build', 'ci:deploy'] do
  end

end