spec.rb

require 'rake'
require 'rspec/core/rake_task'

task :spec    => 'spec:all'
task :default => :spec

namespace :spec do
  targets = []
  # get indivisual role from spec dir
  Dir.glob('./spec/*').each do |dir|
    next unless File.directory?(dir)
    target = File.basename(dir)
    target = "_#{target}" if target == "default"
    targets << target
  end

  ENV['TARGET_HOSTS'].split(',').each do |host|
    targets.each do |target|
      RSpec::Core::RakeTask.new(target.to_sym) do |t|
        ENV['TARGET_HOST'] = host
        t.pattern = "spec/#{target}/*_spec.rb"
      end
    end
  end
end